11-554
Native American Heritage Commission
Native American Contact List
San Bernardino County
7/19/2023
Tribe Name
Fed (F)
Non -Fed (N)
Contact Person
Contact Address
Phone #
Fax #
Email Address
Cultural
Affiliation
Counties
Agua Caliente Band
of Cahuilla Indians
F
Patricia Garcia -Plotkin,
Director
5401 Dinah Shore Drive
Palm Springs, CA, 92264
(760) 699-6907
(760) 699-6924
[email protected]
Cahuilla
Imperial,Riverside,San
Bernardino,San Diego
Agua Caliente Band
of Cahuilla Indians
F
Reid Milanovich, Chairperson
5401 Dinah Shore Drive
Palm Springs, CA, 92264
(760) 699-6800
(760) 699-6919
[email protected]
Cahuilla
Imperial,Riverside,San
Bernardino,San Diego
Augustine Band of
Cahuilla Mission
Indians
F
Amanda Vance, Chairperson
84-001 Avenue 54
Coachella, CA, 92236
(760) 398-4722
(760) 369-7161
[email protected]
Cahuilla
Imperial,Riverside,San
Bernardino,San Diego
Cabazon Band of
Mission Indians
F
Doug Welmas, Chairperson
84-245 Indio Springs Parkway
Indio, CA, 92203
(760) 342-2593
(760) 347-7880
[email protected]
Cahuilla
Imperial,Riverside,San
Bernardino,San Diego
Cahuilla Band of
Indians
F
Anthony Madrigal, Tribal
Historic Preservation Officer
52701 CA Highway 371
Anza, CA, 92539
(951) 763-5549
[email protected]
Cahuilla
Imperial,Riverside,San
Bernardino,San Diego
Cahuilla Band of
Indians
F
Daniel Salgado, Chairperson
52701 CA Highway 371
Anza, CA, 92539
(951) 972-2568
(951) 763-2808
[email protected]
Cahuilla
Imperial,Riverside,San
Bernardino,San Diego
Cahuilla Band of
Indians
F
BobbyRay Esaprza, Cultural
Director
52701 CA Highway 371
Anza, CA, 92539
(951) 763-5549
[email protected]
Cahuilla
Imperial,Riverside,San
Bernardino,San Diego
Los Coyotes Band of
Cahuilla and Cupeno
Indians
F
Ray Chapparosa, Chairperson
P.O. Box 189
Warner Springs, CA, 92086-0189
(760) 782-0711
(760) 782-0712
Cahuilla
Imperial,Riverside,San
Bernardino,San Diego
Morongo Band of
Mission Indians
F
Ann Brierty, THPO
12700 Pumarra Road
Banning, CA, 92220
(951) 755-5259
(951) 572-6004
[email protected]
Cahuilla
Serrano
Imperial,Los Angeles,Riverside,San
Bernardino,San Diego
Morongo Band of
Mission Indians
F
Robert Martin, Chairperson
12700 Pumarra Road
Banning, CA, 92220
(951) 755-5110
(951) 755-5177
[email protected]
Cahuilla
Serrano
Imperial,Los Angeles,Riverside,San
Bernardino,San Dieggs
Quechan Tribe of the
Fort Yuma
Reservation
F
Jordan Joaquin, President,
Quechan Tribal Council
P.O.Box 1899
Yuma, AZ, 85366
(760) 919-3600
[email protected]
Quechan
Imperial,Kern,Los
Angeles,Riverside,San
Bernardino,San Diego
Quechan Tribe of the
Fort Yuma
Reservation
F
Jill McCormick, Historic
Preservation Officer
P.O. Box 1899
Yuma, AZ, 85366
(928) 261-0254
[email protected]
Quechan
Imperial,Kern,Los
Angeles,Riverside,San
Bernardino,San Diego
Quechan Tribe of the
Fort Yuma
Reservation
F
Manfred Scott, Acting
Chairman - Kw'ts'an Cultural
Committee
P.O. Box 1899
Yuma, AZ, 85366
(928) 210-8739
[email protected]
Quechan
Imperial,Kern,Los
Angeles,Riverside,San
Bernardino,San Diego
Ramona Band of
Cahuilla
F
John Gomez, Environmental
Coordinator
P. O. Box 391670
Anza, CA, 92539
(951) 763-4105
(951) 763-4325
[email protected]
Cahuilla
Imperial,Riverside,San
Bernardino,San Diego
Ramona Band of
Cahuilla
F
Joseph Hamilton, Chairperson
P.O. Box 391670
Anza, CA, 92539
(951) 763-4105
(951) 763-4325
[email protected]
Cahuilla
Imperial,Riverside,San
Bernardino,San Diego
Santa Rosa Band of
Cahuilla Indians
F
Lovina Redner, Tribal Chair
P.O. Box 391820
Anza, CA, 92539
(951) 659-2700
(951) 659-2228
[email protected]
Cahuilla
Imperial,Los
Angeles,Orange,Riverside,San
Bernardino,San Diego
Soboba Band of
Luiseno Indians
F
Jessica Valdez, Cultural
Resource Specialist
P.O. Box 487
San Jacinto, CA, 92581
(951) 663-6261
(951) 654-4198
[email protected]
Cahuilla
Luiseno
Imperial,Los
Angeles,Orange,Riverside,San
Bernardino,San Diego
Soboba Band of
Luiseno Indians
F
Joseph Ontiveros, Tribal
Historic Preservation Officer
P.O. Box 487
San Jacinto, CA, 92581
(951) 663-5279
(951) 654-4198
[email protected]
Cahuilla
Luiseno
Imperial,Los
Angeles,Orange,Riverside,San
Bernardino,San Diego
Torres -Martinez
Desert Cahuilla
Indians
F
Cultural Committee,
P.O. Box 1160
Thermal, CA, 92274
(760) 397-0300
(760) 397-8146
Cultural-Committee@torresmartinez-
nsn.gov
Cahuilla
Imperial,Riverside,San
Bernardino,San Diego
This list is current only as of the date of this document. Distribution of this list does not relieve any person of statutory responsibility as defined in Section 7050.5 of the Health and Safety Code, Section 5097.94 of the Public Resource Section 5097.98 of the Public Resources Code.
This list is only applicable for contacting local Native Americans with regard to cultural resources assessment for the proposed AHC Skilled Nursing Facility Project, Riverside County.
Record: PROJ-2023-003570
Report Type: List of Tribes
Counties: Riverside
NAHC Group: All
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AHC-Skilled Nursing Facility
NOISE AND VIBRATION ANALYSIS
CITY OF RANCHO MIRAGE
PREPARED BY:
Bill Lawson, PE, INCE
[email protected]
(949) 584-3148
AUGUST 3, 2023
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TABLE OF CONTENTS
TABLE OF CONTENTS III
APPENDICES IV
LIST OF EXHIBITS IV
LIST OF TABLES V
LIST OF ABBREVIATED TERMS VI
EXECUTIVE SUMMARY 1
1 INTRODUCTION 3
1.1 Site Location 3
1.2 Project Description 3
2 FUNDAMENTALS 7
2.1 Range of Noise 7
2.2 Noise Descriptors 8
2.3 Sound Propagation 8
2.4 Noise Control 9
2.5 Noise Barrier Attenuation 9
2.6 Land Use Compatibility With Noise 10
2.7 Community Response to Noise 10
2.8 Vibration 11
3 REGULATORY SETTING 13
3.1 State of California Noise Requirements 13
3.2 City of Rancho Mirage General Plan Noise Element 14
3.3 Operational Noise Standards 15
3.4 Construction Noise Standards 16
3.5 Vibration Standards 17
4 SIGNIFICANCE CRITERIA 19
4.1 Noise Level Increases (Threshold A) 19
4.2 Vibration (Threshold B) 20
4.3 CEQA Guidelines Not Further Analyzed (Threshold C) 20
4.4 Significance Criteria Summary 20
5 EXISTING NOISE LEVEL MEASUREMENTS 21
5.1 Measurement Procedure and Criteria 21
5.2 Noise Measurement Locations 21
5.3 Noise Measurement Results 22
6 RECEIVER LOCATIONS 25
7 OPERATIONAL NOISE IMPACTS 27
7.1 Operational Noise Sources 27
7.2 Reference Noise Levels 27
7.3 CadnaA Noise Prediction Model 30
7.4 Project Operational Noise Levels 30
7.5 Project Operational Noise Level Increases 31
7.6 Off -Site Traffic Noise Analysis 33
8 CONSTRUCTION IMPACTS 35
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8.1 Construction Noise Levels 35
8.2 Construction Reference Noise Levels 35
8.3 Construction Noise Analysis 37
8.4 Construction Noise Level Compliance 38
8.5 Construction Vibration Analysis 39
9 REFERENCES 41
10 CERTIFICATION 43
APPENDICES
APPENDIX 3.1: CITY OF RANCHO MIRAGE MUNICIPAL CODE
APPENDIX 5.1: STUDY AREA PHOTOS
APPENDIX 5.2: NOISE LEVEL MEASUREMENT WORKSHEETS
APPENDIX 7.1: CADNAA OPERATIONAL NOISE CALCULATIONS
APPENDIX 8.1: CADNAA CONSTRUCTION NOISE CALCULATIONS
LIST OF EXHIBITS
EXHIBIT 1-A: LOCATION MAP 4
EXHIBIT 1-B: SITE PLAN 5
EXHIBIT 2-A: TYPICAL NOISE LEVELS 7
EXHIBIT 2-B: NOISE LEVEL INCREASE PERCEPTION 10
EXHIBIT 2-C: TYPICAL LEVELS OF GROUND -BORNE VIBRATION 12 EXHIBIT 3-A: NOISE LEVEL AND LAND USE COMPATIBILITY 16
EXHIBIT 5-A: NOISE MEASUREMENT LOCATIONS 23
EXHIBIT 6-A: RECEIVER LOCATIONS 26
EXHIBIT 7-A: STATIONARY SOURCE NOISE LOCATIONS 28
EXHIBIT 8-A: TYPICAL CONSTRUCTION NOISE SOURCE LOCATIONS 36 15548-02 Noise Study
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LIST OF TABLES
TABLE ES -1: SUMMARY OF CEQA SIGNIFICANCE FINDINGS 1
TABLE 3-1: OPERATIONAL NOISE STANDARDS 15
TABLE 4-1: SIGNIFICANCE CRITERIA SUMMARY 20
TABLE 5-1: AMBIENT NOISE LEVEL MEASUREMENTS 22
TABLE 7-1: REFERENCE NOISE LEVEL MEASUREMENTS 29
TABLE 7-2: PROJECT OPERATIONAL NOISE LEVELS 31
TABLE 7-3: DAYTIME PROJECT STATIONARY SOURCE NOISE LEVEL INCREASES 32 TABLE 7-4: EVENING PROJECT STATIONARY SOURCE NOISE LEVEL INCREASES 32 TABLE 7-5: NIGHTTIME PROJECT STATIONARY SOURCE NOISE LEVEL INCREASES 33 TABLE 8-1: CONSTRUCTION REFERENCE NOISE LEVELS 37
TABLE 8-2: CONSTRUCTION EQUIPMENT NOISE LEVEL SUMMARY 38 TABLE 8-3: CONSTRUCTION NOISE LEVEL COMPLIANCE 38
TABLE 8-4: VIBRATION SOURCE LEVELS FOR CONSTRUCTION EQUIPMENT 39 TABLE 8-5: PROJECT CONSTRUCTION VIBRATION LEVELS 40
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LIST OF ABBREVIATED TERMS
(1) Reference
ANSI American National Standards Institute
Calveno California Vehicle Noise
CEQA California Environmental Quality Act
CNEL Community Noise Equivalent Level
dBA A -weighted decibels
EPA Environmental Protection Agency
FHWA Federal Highway Administration
FTA Federal Transit Administration
INCE Institute of Noise Control Engineering
Leg Equivalent continuous (average) sound level
Lmax Maximum level measured over the time interval
mph Miles per hour
PPV Peak Particle Velocity
Project AHC-Skilled Nursing Facility
REMEL Reference Energy Mean Emission Level
RMS Root -mean -square
VdB Vibration Decibels
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EXECUTIVE SUMMARY
Urban Crossroads, Inc. has prepared this noise study to determine the noise exposure and the necessary noise mitigation measures for the proposed AHC-Skilled Nursing Facility development ("Project"). The Project site is located north of Gerald Ford Drive and east of Bob Hope Drive in the City of Rancho Mirage. The Project proposes to develop a one-story 46 -bed skilled nursing facility. This noise study has been prepared to satisfy applicable City of Rancho Mirage noise standards and significance criteria based on Appendix G of the California Environmental Quality Act (CEQA) Guidelines (1).
The results of this Noise and Vibration Analysis are summarized below based on the significance criteria in Section 4 of this report consistent with Appendix G of the California Environmental Quality Act (CEQA) Guidelines. (1) Table ES -1 shows the findings of significance for each potential noise and/or vibration impact under CEQA before and after any required mitigation measures.
TABLE ES -1: SUMMARY OF CEQA SIGNIFICANCE FINDINGS
Analysis
Report
Section
Significance Findings
Unmitigated
Mitigated
Off -Site Traffic Noise
7 Less Than Significant
-
Operational Noise
9 Less Than Significant
-
Construction Noise
10 Less Than Significant
-
Construction Vibration
Less Than Significant
-
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AHC-Skilled Nursing Facility Noise and Vibration Analysis 1 INTRODUCTION
This noise analysis has been completed to determine the noise impacts associated with the development of the proposed AHC-Skilled Nursing Facility ("Project"). This noise study briefly describes the proposed Project, provides information regarding noise fundamentals, sets out the regulatory setting, presents the study methods and procedures, and evaluates the future exterior noise environment. In addition, this study includes an analysis of the potential Project -related long-term stationary -source operational noise and short-term construction noise, and vibration impacts.
1.1 SITE LOCATION
The proposed Project is located north of Gerald Ford Drive and east of Bob Hope Drive in the City of Rancho Mirage, as shown on Exhibit 1-A.
1.2 PROJECT DESCRIPTION
A preliminary site plan for the proposed Project is shown on Exhibit 1-B. The Project is proposed to construct a new, one story, 46 bed, 39,158 SF skilled nursing facility. This facility will be state of the art, inclusive of large therapy spaces, courtyards, upscale dining, and flat screen HDTVs in private patient rooms among other high -end amenities. Facility will provide short term, inpatient, post -acute, medical care as needed to help patients recover and recuperate more effectively after a hospital visit.
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AHC-Skilled Nursing Facility Noise and Vibration Analysis EXHIBIT 1-A: LOCATION MAP
Pete Dye Golf
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Abby Rd
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o c
Gerald Ford Dr
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310ft Center•
Gardens
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Retreat at
Sunnylands
Golf Course
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Rancho Mirage
Dinah Shore Dr
. 340 ft St Tho maso
rn Clearwater Way
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o Victory Dr
a Via Noela
9 • J 2
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Sources: Esri, HERE, Garmin, I rmap,
increment P Corp., GEBCO, U , FAO, NPS,
NRCAN, GeoBase, 1GN, Kudos r NL, Ordnance
Survey, Esri Japan, METI, Esri Ina (Hong Kong),
(c) OpenStreetMap contribut s, and U' GIs
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AHC-Skilled Nursing Facility Noise and Vibration Analysis EXHIBIT 1-B: SITE PLAN
122+/- PARKING SPACES TOTAL (PARCELS I k 2)
m
180.289 SF
4.14 ACRES
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AHC-Skilled Nursing Facility Noise and Vibration Analysis 2 FUNDAMENTALS
Noise is simply defined as "unwanted sound." Sound becomes unwanted when it interferes with normal activities, when it causes actual physical harm or when it has adverse effects on health.
Noise is measured on a logarithmic scale of sound pressure level known as a decibel (dB). A - weighted decibels (dBA) approximate the subjective response of the human ear to broad frequency noise source by discriminating against very low and very high frequencies of the audible spectrum. They are adjusted to reflect only those frequencies which are audible to the human ear. Exhibit 2-A presents a summary of the typical noise levels and their subjective loudness and effects that are described in more detail below.
EXHIBIT 2-A: TYPICAL NOISE LEVELS
COMMON OUTDOOR
ACTIVITIES
COMMON INDOOR
ACTIVITIES
A - WEIGHTED
SOUND LEVEL dBA
SUBJECTIVE
LOUDNESS
EFFECTS OF
NOISE
THRESHOLD OF PAIN
140
HEARING LOSS
.Milli
NEAR JET ENGINE
130
OLERABLE OR
120
DEAFENING
JET FLY -OVER AT 300m (1000 ft)
ROCK BAND
110
LOUD AUTO HORN
100
VERY NOISY
GAS LAWN MOWER AT 1m (3 ft)
90 DIESEL TRUCK AT 15m (50 ft),
at 80 km/hr (50 mph)
FOOD BLENDER AT 1 m (3 ft)
80 SPEECH
INTERFERENCE
NOISY URBAN AREA, DAYTIME
VACUUM CLEANER AT 3m (10 ft)
70 LOUD
HEAVY TRAFFIC AT 90m (300 ft)
NORMAL SPEECH AT 1m (3 ft)
60 QUIET URBAN DAYTIME
LARGE BUSINESS OFFICE
50 MODERATE
SLEEP
DISTURBANCE
QUIET URBAN NIGHTTIME
THEATER, LARGE CONFERENCE
ROOM (BACKGROUND)
40 QUIET SUBURBAN NIGHTTIME
LIBRARY
30 FAINT
NO EFFECT
QUIET RURAL NIGHTTIME
BEDROOM AT NIGHT, CONCERT
HALL (BACKGROUND)
20 BROADCAST/RECORDING
STUDIO
10 VERY FAINT
LOWEST THRESHOLD OF HUMAN
HEARING
LOWEST THRESHOLD OF HUMAN
HEARING
0 Source: Environmental Protection Agency Office of Noise Abatement and Control, Information on Levels of Environmental Noise Requisite to Protect Public Health and Welfare with an Adequate Margin of Safety (EPA/ONAC 550/9-74-004) March 1974.
2.1 RANGE OF NOISE
Since the range of intensities that the human ear can detect is so large, the scale frequently used to measure intensity is a scale based on multiples of 10, the logarithmic scale. The scale for measuring intensity is the decibel scale. Each interval of 10 decibels indicates a sound energy ten times greater than before, which is perceived by the human ear as being roughly twice as loud. (2) The most common sounds vary between 40 dBA (very quiet) to 100 dBA (very loud). Normal conversation at three feet is roughly at 60 dBA, while loud jet engine noises equate to 110 dBA 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis at approximately 1,000 feet, which can cause serious discomfort. (3) Another important aspect of noise is the duration of the sound and the way it is described and distributed in time.
2.2 NOISE DESCRIPTORS
Environmental noise descriptors are generally based on averages, rather than instantaneous, noise levels. The most used metric is the equivalent level (Leq). Equivalent sound levels are not measured directly but are calculated from sound pressure levels typically measured in A - weighted decibels (dBA). The equivalent sound level (Leq) represents a steady state sound level containing the same total energy as a time varying signal over a given sample period and is commonly used to describe the "average" noise levels within the environment.
Peak hour or average noise levels, while useful, do not completely describe a given noise environment. Noise levels lower than peak hour may be disturbing if they occur during times when quiet is most desirable, namely evening and nighttime (sleeping) hours. To account for this, the Community Noise Equivalent Level (CNEL), representing a composite 24 -hour noise level is utilized. The CNEL is the weighted average of the intensity of a sound, with corrections for time of day, and averaged over 24 hours. The time -of -day corrections require the addition of 5 decibels to dBA Leq sound levels in the evening from 7:00 p.m. to 10:00 p.m., and the addition of 10 decibels to dBA Leq sound levels at night between 10:00 p.m. and 7:00 a.m. These additions are made to account for the noise sensitive time periods during the evening and night hours when noise can become more intrusive. CNEL does not represent the actual sound level heard at any time, but rather represents the total sound exposure. The City of Rancho Mirage relies on the 24 -hour CNEL level to assess land use compatibility with transportation related noise sources.
2.3 SOUND PROPAGATION
When sound propagates over a distance, it changes in level and frequency content. The way noise reduces with distance depends on the following factors.
2.3.1 GEOMETRIC SPREADING
Sound from a localized source (i.e., a stationary point source) propagates uniformly outward in a spherical pattern. The sound level attenuates (or decreases) at a rate of 6 dB for each doubling of distance from a point source. Highways consist of several localized noise sources on a defined path and hence can be treated as a line source, which approximates the effect of several point sources. Noise from a line source propagates outward in a cylindrical pattern, often referred to as cylindrical spreading. Sound levels attenuate at a rate of 3 dB for each doubling of distance from a line source. (2)
2.3.2 GROUND ABSORPTION
The propagation path of noise from a highway to a receiver is usually very close to the ground.
Noise attenuation from ground absorption and reflective wave canceling adds to the attenuation associated with geometric spreading. Traditionally, the excess attenuation has also been expressed in terms of attenuation per doubling of distance. This approximation is usually 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis sufficiently accurate for distances of less than 200 ft. For acoustically hard sites (i.e., sites with a reflective surface between the source and the receiver, such as a parking lot or body of water), no excess ground attenuation is assumed. For acoustically absorptive or soft sites (i.e., those sites with an absorptive ground surface between the source and the receiver such as soft dirt, grass, or scattered bushes and trees), an excess ground attenuation value of 1.5 dB per doubling of distance is normally assumed. When added to the cylindrical spreading, the excess ground attenuation results in an overall drop-off rate of 4.5 dB per doubling of distance from a line source. (4)
2.3.3 ATMOSPHERIC EFFECTS
Receivers located downwind from a source can be exposed to increased noise levels relative to calm conditions, whereas locations upwind can have lowered noise levels. Sound levels can be increased at large distances (e.g., more than 500 feet) due to atmospheric temperature inversion (i.e., increasing temperature with elevation). Other factors such as air temperature, humidity, and turbulence can also have significant effects. (2)
2.3.4 SHIELDING
A large object or barrier in the path between a noise source and a receiver can substantially attenuate noise levels at the receiver. The amount of attenuation provided by shielding depends on the size of the object and the frequency content of the noise source. Shielding by trees and other such vegetation typically only has an "out of sight, out of mind" effect. That is, the perception of noise impact tends to decrease when vegetation blocks the line -of -sight to nearby residents. However, for vegetation to provide a substantial, or even noticeable, noise reduction, the vegetation area must be at least 15 feet in height, 100 feet wide and dense enough to completely obstruct the line -of -sight between the source and the receiver. This size of vegetation may provide up to 5 dBA of noise reduction. The Federal Highway Administration (FHWA) does not consider the planting of vegetation to be a noise abatement measure. (5)
2.4 NOISE CONTROL
Noise control is the process of obtaining an acceptable noise environment for an observation point or receiver by controlling the noise source, transmission path, receiver, or all three. This concept is known as the source -path -receiver concept. In general, noise control measures can be applied to these three elements.
2.5 NOISE BARRIER ATTENUATION
Effective noise barriers can reduce noise levels by 10 to 15 dBA, cutting the loudness of traffic noise in half. A noise barrier is most effective when placed close to the noise source or receiver.
Noise barriers, however, do have limitations. For a noise barrier to work, it must block the line - of -sight path of sound from the noise source.
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2.6 LAND USE COMPATIBILITY WITH NOISE
Some land uses are more tolerant of noise than others. For example, schools, hospitals, churches, and residences are more sensitive to noise intrusion than are commercial or industrial developments and related activities. As ambient noise levels affect the perceived amenity or livability of a development, so too can the mismanagement of noise impacts impair the economic health and growth potential of a community by reducing the area's desirability as a place to live, shop and work. For this reason, land use compatibility with the noise environment is an important consideration in the planning and design process. The FHWA encourages State and Local government to regulate land development in such a way that noise -sensitive land uses are either prohibited from being located adjacent to a highway, or that the developments are planned, designed, and constructed in such a way that noise impacts are minimized. (6)
2.7 COMMUNITY RESPONSE TO NOISE
Approximately sixteen percent of the population has a very low tolerance for noise and will object to any noise not of their making. Consequently, even in the quietest environment, some complaints may occur. Twenty to thirty percent of the population will not complain even in very severe noise environments. (7 pp. 8-6) Thus, a variety of reactions can be expected from people exposed to any given noise environment.
Surveys have shown that community response to noise varies from no reaction to vigorous action for newly introduced noises averaging from 10 dB below existing to 25 dB above existing. (8) According to research originally published in the Noise Effects Handbook (7), the percentage of high annoyance ranges from approximately 0 percent at 45 dB or less, 10 percent are highly annoyed around 60 dB, and increases rapidly to approximately 70 percent being highly annoyed at approximately 85 dB or greater. Despite this variability in behavior on an individual level, the population can be expected to exhibit the following responses to changes in noise levels as shown on Exhibit 2-B. A change of 3 dBA is considered barely perceptible, and changes of 5 dBA are considered readily perceptible. (4)
EXHIBIT 2-B: NOISE LEVEL INCREASE PERCEPTION
Twice as Loud
Readily Perceptible
Barely Perceptible
Just Perceptible
1 2 3 4 5 6 7 8 9 10
Noise Level Increase (dBA)
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2.8 VIBRATION
Per the Federal Transit Administration (FTA) Transit Noise Impact and Vibration Impact Assessment Manual (8) , vibration is the periodic oscillation of a medium or object. The rumbling sound caused by the vibration of room surfaces is called structure -borne noise. Sources of ground -borne vibrations include natural phenomena (e.g., earthquakes, volcanic eruptions, sea waves, landslides) or human -made causes (e.g., explosions, machinery, traffic, trains, construction equipment). Vibration sources may be continuous, such as factory machinery, or transient, such as explosions. As is the case with airborne sound, ground -borne vibrations may be described by amplitude and frequency.
There are several different methods that are used to quantify vibration. The peak particle velocity (PPV) is defined as the maximum instantaneous peak of the vibration signal. The PPV is most frequently used to describe vibration impacts to buildings but is not always suitable for evaluating human response (annoyance) because it takes some time for the human body to respond to vibration signals. Instead, the human body responds to average vibration amplitude often described as the root mean square (RMS). The RMS amplitude is defined as the average of the squared amplitude of the signal and is most frequently used to describe the effect of vibration on the human body. Decibel notation (VdB) is commonly used to measure RMS. Decibel notation (VdB) serves to reduce the range of numbers used to describe human response to vibration.
Typically, ground -borne vibration generated by man-made activities attenuates rapidly with distance from the source of the vibration. Sensitive receivers for vibration include structures (especially older masonry structures), people (especially residents, the elderly, and sick), and vibration -sensitive equipment and/or activities.
The background vibration -velocity level in residential areas is generally 50 VdB. Ground -borne vibration is normally perceptible to humans at approximately 65 VdB. For most people, a vibration -velocity level of 75 VdB is the approximate dividing line between barely perceptible and distinctly perceptible levels. Typical outdoor sources of perceptible ground -borne vibration are construction equipment, steel -wheeled trains, and traffic on rough roads. If a roadway is smooth, the ground -borne vibration is rarely perceptible. The range of interest is from approximately 50 VdB, which is the typical background vibration -velocity level, to 100 VdB, which is the general threshold where minor damage can occur in fragile buildings. Exhibit 2-C illustrates common vibration sources and the human and structural response to ground -borne vibration. 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis EXHIBIT 2-C: TYPICAL LEVELS OF GROUND -BORNE VIBRATION
Human/Structural Response
Threshold, minor cosmetic damage
fragile buildings
Difficulty with tasks such as
reading a VDT screen
Velocity Typical Sources
Level' (50 ft from source)
Residential annoyance, infrequent ---,-
events (e.g. commuter rail)
Residential annoyance, frequent —0-
events (e.g. rapid transit)
Limit for vibration sensitive
equipment. Approx. threshold for
human perception of vibration
00 90
Blasting from construction projects
�— Bulldozers and other heavy tracked
construction equipment
Commuter rail, upper range
80 Rapid transit, upper range
Commuter rail, typical
~— Bus or truck over bump
70 •— Rapid transit, typical
60 50
.4— Bus or truck, typical
"" — Typical background vibration
RMS Vibration Velocity Level in VdB relative to 10.6 inches/second Source: Federal Transit Administration (FTA) Transit Noise and Vibration Impact Assessment Manual. 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis 3 REGULATORY SETTING
To limit population exposure to physically and/or psychologically damaging as well as intrusive noise levels, the federal government, the State of California, various county governments, and most municipalities in the state have established standards and ordinances to control noise. In most areas, automobile and truck traffic is the major source of environmental noise. Traffic activity generally produces an average sound level that remains constant with time. Air and rail traffic, and commercial and industrial activities are also major sources of noise in some areas.
Federal, state, and local agencies regulate different aspects of environmental noise. Federal and state agencies generally set noise standards for mobile sources such as aircraft and motor vehicles, while regulation of stationary sources is left to local agencies.
3.1 STATE OF CALIFORNIA NOISE REQUIREMENTS
The State of California regulates freeway noise, sets standards for sound transmission, provides occupational noise control criteria, identifies noise standards, and provides guidance for local land use compatibility. State law requires that each county and city adopt a General Plan that includes a Noise Element which is to be prepared per guidelines adopted by the Governor's Office of Planning and Research (OPR). (9) The purpose of the Noise Element is to limit the exposure of the community to excessive noise levels. In addition, the California Environmental Quality Act (CEQA) requires that all known environmental effects of a project be analyzed, including environmental noise impacts.
3.1.1 RESIDENTIAL CONSTRUCTION
The State of California's noise insulation standards for all residential units are codified in the California Code of Regulations (CCR), Title 24, Building Standards Administrative Code, Section 1206 to 1207.11.2. These noise standards are applied to new construction that contains dwelling units or sleeping units, such as residential and hotel or motel uses, in California for controlling interior noise levels resulting from exterior noise sources. For new buildings, the acceptable interior noise limit is 45 dBA CNEL in habitable rooms (10).
3.1.2 NON-RESIDENTIAL CONSTRUCTION
The State of California's Green Building Standards Code contains mandatory measures for non- residential building construction in Section 5.507 on Environmental Comfort (11). These noise standards are applied to new construction in California for controlling interior noise levels resulting from exterior noise sources. The regulations specify that acoustical studies must be prepared when non-residential structures are developed in areas where the exterior noise levels exceed 65 dBA CNEL, such as within a noise contour of an airport, freeway, railroad, and other noise source. If the development falls within an airport or freeway 65 dBA CNEL noise contour, buildings shall be construction to provide an interior noise level environment attributable to exterior sources that does not exceed an hourly equivalent level of 50 dBA Leg in occupied areas during any hour of operation.
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AHC-Skilled Nursing Facility Noise and Vibration Analysis
3.2 CITY OF RANCHO MIRAGE GENERAL PLAN NOISE ELEMENT
The City of Rancho Mirage has adopted a Noise Element of the General Plan (2017) to control and abate environmental noise, and to protect the citizens of and visitors to the City of Rancho Mirage from excessive exposure to noise. The Noise Element is intended to help align the community's various land uses with the existing and future noise environment and thus ensure that any negative effects of noise are minimized or completely avoided.
The noise criteria identified in the City of Rancho Mirage Noise Element are guidelines to evaluate the land use compatibility of transportation related noise. To assist the city in the planning compatible uses, a range of exterior noise thresholds for various land uses have been developed.
Particularly sensitive land uses include residences, schools, libraries, churches, hospitals and nursing homes, and destination resort areas. In addition, parks, golf courses, and other outdoor activity areas can be sensitive to noise disturbances. Less sensitive land uses include commercial uses, conventional hotels and motels, and playgrounds. Least sensitive to noise are heavy commercial uses, transportation, communication, and utility land uses.
To protect noise sensitive land uses, and minimize the effects of excessive and nuisance noise, the City of Rancho Mirage General Plan Noise Element has outlined the following noise policies with the goal (Goal N 1) of a noise environment providing peace and quiet that complements and is consistent with Rancho Mirage's resort residential character:
Policy N 1.1: Land use patterns, associated traffic and its distribution, and individual developments shall be assessed for their potential to generate adverse and incompatible noise impacts.
Noise exceeding normally acceptable levels shall be appropriately mitigated.
Policy N 1.2
Noise sensitive land uses, including residences, resorts, community open space, schools, libraries, churches, hospitals, and convalescent homes, shall be protected from high noise levels emitted by both existing and future noise sources.
Policy N 1.3 Project designs shall be required to include measures that assure that interior noise levels for residential development do not exceed 45 dBA CNEL.
Policy N 1.4 Land uses allowed adjacent to Rancho Mirage's major arterial roads and highways, or the Southern Pacific Railroad/I-10 corridor, should generally be limited to those that are compatible with higher noise levels to maximize noise -related land use compatibility.
Policy N 1.5
Develop and maintain a circulation plan that is consistent with the resort residential character of Rancho Mirage, avoids impacts to existing and planned sensitive receptors/uses, and provides fixed routes for existing and future truck traffic.
The Noise Level and Land Use Compatibility matrix in the Noise Element shown on Exhibit 3-A provides guidelines to evaluate the acceptability of the transportation related noise level impacts. Single-family residential land uses are considered normally acceptable with exterior noise levels below 60 dBA CNEL and conditionally acceptable with noise levels below 70 dBA CNEL. Multi -family residential land uses are considered normally acceptable with exterior noise levels below 65 dBA CNEL and conditionally acceptable with noise levels below 70 dBA CNEL. For 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis conditionally acceptable land use, new construction or development undertaken only after a detailed analysis of the noise reduction requirements is made and necessary noise insulation features are included in the design. Conventional construction, but with closed windows and fresh air supply system or air conditioning will normally suffice. Outdoor environment will seem noisy.
3.3 OPERATIONAL NOISE STANDARDS
To analyze noise impacts originating from a designated fixed location or private property such as the AHC-Skilled Nursing Facility Project, stationary -source (operational) noise such as the expected roof -top air conditioning units, trash enclosure activity, parking lot vehicle movements, and emergency backup generator are typically evaluated against standards established under a jurisdiction's Municipal Code. The City of Rancho Mirage Municipal Code noise standards are provided in Appendix 3.1. The City of Rancho Mirage Municipal Code (RMMC), Chapter 8.45 establishes the noise level standards for stationary noise sources. The Project's land use will potentially impact nearby noise -sensitive uses in the Project study area. For nearby noise - sensitive residential land uses in the Project study area, Section 8.45.030 identifies the base exterior noise level standard of 55 dBA Leq during the daytime hours (7:00 a.m. to 6:00 p.m.), 50 dBA Leq during the evening hours (6:00 p.m. to 10:00 p.m.) and 45 dBA Leq during the nighttime hours (10:00 p.m. to 7:00 a.m.). (12) Table 3-1 provides a summary of the City of Rancho Mirage operational exterior noise level standards for all land use types.
TABLE 3-1: OPERATIONAL NOISE STANDARDS
Land
User
Zone2
Pe' irmod
Exterior Noise
Level Standards
(dBA Leq)3
Residential
(Low Density)
R -E, H -R,
R -L-2, R -L-3
Daytime (7:00 a.m. to 6:00 p.m.)
55 Evening (6:00 p.m. to 10:00 p.m.)
50 Nighttime (10:00 p.m. to 7:00 a.m.)
45 Residential
(Medium and High Density,
g
Hospital, Open Space)
OS, R M,
R -H, MHP
Daytime (7:00 a.m. to 6:00 p.m.)
60 Evening (6:00p.m. to 10:00 m.
p )
55 Nighttime (10:00 p.m. to 7:00 a.m.)
50 Commercial Office, Resort
Commercial, Mixed Use,
Institutional
0, P, Rs -H,
M -U
Daytime (7:00 a.m. to 6:00 p.m.)
65 Evening (6:00 p.m. to 10:00 p.m.)
60 Nighttime (10:00 p.m. to 7:00 a.m.)
55 Commercial Neighborhood,
General Commercial, Commercial
Recreation, Light Industrial
C -N, C -G, (-
L
Daytime (7:00 a.m. to 6:00 p.m.)
70 Evening (6:00 p.m. to 10:00 p.m.)
65 Nighttime (10:00 p.m. to 7:00 a.m.)
60 City of Rancho Mirage Municipal Code, Section 8.45.030 Exterior noise level limits (Appendix 3.1). 'City of Rancho Mirage Land Use and Zoning Map
3 Leq represents a steady state sound level containing the same total energy as a time varying signal over a given sample period. 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis EXHIBIT 3-A: NOISE LEVEL AND LAND USE COMPATIBILITY
LAND USE CATEGORIES
Residential, low density (single-family dwellings,
duplex, + mobile homes)
Residential multi -family
Transient lodging (motels and hotels)
Schools, libraries, churches, hospitals, nursing homes
Auditoriums, concert halls, amphitheaters
Sports arena, outdoor spectator sports
Playgrounds, neighborhood parks
Gold courses, riding stables, water recreation, cemeteries Office buildings, business, commercial, professional
Industrial, manufacturing, utilities, agriculture
Normally
Acceptable
Conditionally
Acceptable
Specified land use satisfactory based upon the
ossumption that any buildings are
conventionally constructed with no special
noise installation requirements.
New construction or development
undertaken only after detailed analysis of the
noise reduction requirements is made and
necessacry noise insultation featured are
included in design. Conventional
construction, but with closed windows and
fresh air supply system or air conditioning
with normally suffice. Outdoor environment
will seem noisy.
COMMUNITY NOISE EXPOSURE LEVEL (LDN OR CNEL, DBA)
55 60 65 70 75
80 1 1.1
•
II
Normally
Unacceptable
Clearly
unacceptable
New construction or development generally
discouraged, but if it does proceed, a
detailed analysis of noise reduction
requirements must be mode with needed
noise insulation features included in design
and outdoor areas must be shielded.
New construction or development generally
not undertaken. Construction cost to make
indoor environment acceptable would be
prohibitive and outdoor environment would
not be usable.
Source: City of Rancho Mirage General Plan Noise Element (2017) Exhibit 20
3.4 CONSTRUCTION NOISE STANDARDS
To analyze noise impacts originating from the construction of AHC-Skilled Nursing Facility, noise from construction activities is typically evaluated against standards established under a City's Municipal Code. To control noise impacts associated with the construction of the proposed Project, the City has established limits to the hours of operation. The Rancho Mirage Municipal Code (RMMC) Section 15.04.030[A][11] indicates that construction, shall be limited to the hours of 7:00 a.m. and 7:00 p.m. with no activity on Sundays and holidays (13). The city recognizes that construction noise is difficult to control and restricts allowable hours for this intrusion. Still, construction, even when restricted to within these hours, presents a nuisance value when conducted in proximity to sensitive receptors (14). However, neither the City of Rancho Mirage 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis General Plan nor Municipal Code establish numeric maximum acceptable construction source noise levels at potentially affected receivers. Therefore, a numerical construction threshold based on Federal Transit Administration (FTA) Transit Noise and Vibration Impact Assessment Manual is used for analysis of daytime construction impacts, as discussed below.
According to the FTA, local noise ordinances are typically not very useful in evaluating construction noise. They usually relate to nuisance and hours of allowed activity, and sometimes specify limits in terms of maximum levels, but are generally not practical for assessing the impact of a construction project. Project construction noise criteria should account for the existing noise environment, the absolute noise levels during construction activities, the duration of the construction, and the adjacent land use. Due to the lack of standardized construction noise thresholds, the FTA provides guidelines that can be considered reasonable criteria for construction noise assessment. The FTA considers a daytime exterior construction noise level of 80 dBA Leg as a reasonable threshold for noise sensitive residential land use (8 p. 179).
3.5 VIBRATION STANDARDS
Construction activity can result in varying degrees of ground -borne vibration, depending on the equipment and methods used, distance to the affected structures and soil type. Construction vibration is generally associated with pile driving and rock blasting. Other construction equipment such as air compressors, light trucks, hydraulic loaders, etc., generates little or no ground vibration (8).
To analyze vibration impacts associated with the AHC-Skilled Nursing Facility, vibration - generating activities are appropriately evaluated against standards established under a City's Municipal Code if such standards exist. While Section 17.18.080 of the RMMC requires that no vibration associated with any use shall be allowed which is discernable beyond the boundary line of the subject property, the City of Rancho Mirage does not identify specific construction vibration level limits. Therefore, for analysis purposes, the Caltrans Transportation and Construction Vibration Guidance Manual, (15 p. 38) Table 19, vibration damage are used in this noise study to assess potential temporary construction -related impacts at adjacent building locations. The nearest noise sensitive buildings adjacent to the Project site can best be described as "older residential structures" with a maximum acceptable continuous vibration threshold of
0.3 PPV (in/sec).
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AHC-Skilled Nursing Facility Noise and Vibration Analysis 4 SIGNIFICANCE CRITERIA
The following significance criteria are based on currently adopted guidance provided by Appendix G of the California Environmental Quality Act (CEQA) Guidelines (1). For the purposes of this report, impacts would be potentially significant if the Project results in or causes:
A. Generation of a substantial temporary or permanent increase in ambient noise levels in the vicinity of the project in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies?
B. Generation of excessive ground -borne vibration or ground -borne noise levels? C. For a project located within the vicinity of a private airstrip or an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project expose people residing or working in the project area to excessive noise levels?
4.1 NOISE LEVEL INCREASES (THRESHOLD A)
Noise level increases resulting from the Project are evaluated based on the Appendix G CEQA Guidelines described above at the closest sensitive receiver locations. Under CEQA, consideration must be given to the magnitude of the increase, the existing ambient noise levels, and the location of noise -sensitive receivers to determine if a noise increase represents a significant adverse environmental impact. This approach recognizes that there is no single noise increase that renders the noise impact significant. (16) This is primarily because of the wide variation in individual thresholds of annoyance and differing individual experiences with noise.
Thus, an important way of determining a person's subjective reaction to a new noise is the comparison of it to the existing environment to which one has adapted —the so-called ambient environment.
In general, the more a new noise exceeds the previously existing ambient noise level, the less acceptable the new noise will typically be judged. The Federal Interagency Committee on Noise (FICON) (17) developed guidance to be used for the assessment of project -generated increases in noise levels that consider the ambient noise level. The FICON recommendations are based on studies that relate aircraft noise levels to the percentage of persons highly annoyed by aircraft noise. Although the FICON recommendations were specifically developed to assess aircraft noise impacts, these recommendations are often used in environmental noise impact assessments involving the use of cumulative noise exposure metrics, such as the average -daily noise level (CNEL) and equivalent continuous noise level (Leq). The FICON guidance provides an established source of criteria to assess the impacts of substantial temporary or permanent increase in ambient noise levels. Based on the FICON criteria, the amount to which a given noise level increase is considered acceptable is reduced when the without Project noise levels are already shown to exceed certain land -use specific exterior noise level criteria. The specific levels are based on typical responses to noise level increases of 5 dBA or readily perceptible, 3 dBA or barely perceptible, and 1.5 dBA depending on the underlying without Project noise levels for noise - sensitive uses. These levels of increases and their perceived acceptance are consistent with guidance provided by both the Federal Highway Administration (4 p. 9) and Caltrans (18 p. 2_48). 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis
4.2 VIBRATION (THRESHOLD B)
As described in Section 3.5, the vibration impacts originating from the construction of the AHC- Skilled Nursing Facility, vibration -generating activities are appropriately evaluated using the Caltrans vibration damage thresholds to assess potential temporary construction -related impacts at adjacent building locations. The nearest noise sensitive buildings adjacent to the Project site can best be described as "older residential structures" with a maximum acceptable continuous vibration threshold of 0.3 PPV (in/sec).
4.3 CEQA GUIDELINES NOT FURTHER ANALYZED (THRESHOLD C)
CEQA Noise Threshold C applies when there are nearby public and private airports and/or air strips and focuses on land use compatibility of the Project to nearby airports and airstrips. The Project site is not located within two miles of an airport or airstrip. The closest airport is the Palm Springs International Airport located approximately 5.6 miles northwest of the Project site. As such, the Project site would not be exposed to excessive noise levels from airport operations, and therefore, impacts are considered less than significant, and no further noise analysis is conducted in relation to Appendix G to the CEQA Guidelines, Noise Threshold C.
4.4 SIGNIFICANCE CRITERIA SUMMARY
Noise impacts shall be considered significant if any of the following occur as a direct result of the proposed development. Table 4-1 shows the significance criteria summary matrix that includes the allowable criteria used to identify potentially significant incremental noise level increases.
TABLE 4-1: SIGNIFICANCE CRITERIA SUMMARY
Analysis
Receiving
Land Use
Condition(s)
Significance Criteria
Off -Site
Traffic
Noise -
Sensitive
If ambient is _ 5 dBA CNEL Project increase
If If ambient is 60 - 65 dBA CNEL
>_ 3 dBA CNEL Project increase
If ambient is > 65 dBA CNEL
>_ 1.5 dBA CNEL Project increase
Non -Noise-
Sensitivel'2
If ambient is _ 5 dBA CNEL Project increase
If ambient is > 70 dBA CNEL
>_ 3 dBA CNEL Project increase
Operational
All'
Exterior Noise Level Standards
See Table 3-1
Construction
Noise-
Sensitive
Shall be limited to the hours of 7:00 a.m. and 7:00 p.m. with no activity on Sundays and holidays4
Noise Level Thresholds
80 dBA Leg
All
Vibration Level Threshold6
0.3 PPV (in/sec)
FICON, 1992.
2 City of Rancho Mirage General Plan Noise Element.
3 City of Rancho Mirage General Plan Municipal Code, Section 8.45.030 4City of Rancho Mirage General Plan Municipal Code, Section15.04.030[A][10]. 5 Federal Transit Administration, Transit Noise and Vibration Impact Assessment Manual. e Caltrans Transportation and Construction Vibration Manual, April 2020 Table 19. "Daytime" = 7:00 a.m. to 10:00 p.m.; "Nighttime" = 10:00 p.m. to 7:00 a.m. 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis 5 EXISTING NOISE LEVEL MEASUREMENTS
To assess the existing noise level environment, 24 -hour noise level measurements were taken at four locations in the Project study area. The receiver locations were selected to describe and document the existing noise environment within the Project study area. Exhibit 5-A provides the boundaries of the Project study area and the noise level measurement locations. To fully describe the existing noise conditions, noise level measurements were collected by Urban Crossroads, Inc. on Wednesday, June 28, 2023. Appendix 5.1 includes study area photos.
5.1 MEASUREMENT PROCEDURE AND CRITERIA
To describe the existing noise environment, the hourly noise levels were measured during typical weekday conditions over a 24 -hour period. By collecting individual hourly noise level measurements, it is possible to describe the equivalent daytime and nighttime hourly noise levels. The long-term noise readings were recorded using Piccolo Type 2 integrating sound level meter and dataloggers. The Piccolo sound level meters were calibrated using a Larson -Davis calibrator, Model CAL 150. All noise meters were programmed in "slow" mode to record noise levels in "A" weighted form. The sound level meters and microphones were equipped with a windscreen during all measurements. All noise level measurement equipment satisfies the American National Standards Institute (ANSI) standard specifications for sound level meters ANSI S1.4-2014/IEC 61672-1:2013. (19)
5.2 NOISE MEASUREMENT LOCATIONS
The long-term noise level measurements were positioned as close to the nearest sensitive receiver locations as possible to assess the existing ambient hourly noise levels surrounding the Project site. Both Caltrans and the FTA recognize that it is not reasonable to collect noise level measurements that can fully represent every part of a private yard, patio, deck, or balcony normally used for human activity when estimating impacts for new development projects. This is demonstrated in the Caltrans general site location guidelines which indicate that, sites must be free of noise contamination by sources other than sources of interest. Avoid sites located near sources such as barking dogs, lawnmowers, pool pumps, and air conditioners unless it is the express intent of the analyst to measure these sources. (2) Further, FTA guidance states, that it is not necessary nor recommended that existing noise exposure be determined by measuring at every noise -sensitive location in the project area. Rather, the recommended approach is to characterize the noise environment for clusters of sites based on measurements or estimates at representative locations in the community (8).
Based on recommendations of Caltrans and the FTA, it is not necessary to collect measurements at each individual building or residence, because each receiver measurement represents a group of buildings that share acoustical equivalence (8). In other words, the area represented by the receiver shares similar shielding, terrain, and geometric relationship to the reference noise source. Receivers represent a location of noise sensitive areas and are used to estimate the future noise level impacts. Collecting reference ambient noise level measurements at the nearby sensitive receiver locations allows for a comparison of the before and after Project noise levels 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis and is necessary to assess potential noise impacts due to the Project's contribution to the ambient noise levels.
5.3 NOISE MEASUREMENT RESULTS
The noise measurements presented below focus on the equivalent or the hourly energy average sound levels (Leq). The equivalent sound level (Leq) represents a steady state sound level containing the same total energy as a time varying signal over a given sample period. Table 5-1 identifies the hourly daytime (7:00 a.m. to 6:00 p.m.), evening (6:00 p.m. to 10:00 p.m.) and nighttime (10:00 p.m. to 7:00 a.m.) noise levels at each noise level measurement location.
TABLE 5-1: AMBIENT NOISE LEVEL MEASUREMENTS
Location'
Description
Energy Average
Noise Level
(dBA Leq)2
Daytime
Evening
Nighttime
L1
Located north of the site near the medical building at
35900 Bob Hope Dr.
55.2 51.3
48.7 L2
Located northeast of the site near the residence at 35
Alicante Cir.
55.5 52.3
50.3 L3
Located east of the site near the residence at 9 Cassis Cir.
52.7 53.6
53.5 L4
Located west of the site
66.1 64.5
60.2 1 See Exhibit 5-A for the noise level measurement locations. 2 Energy (logarithmic) average levels. The long-term 24 -hour measurement worksheets are included in Appendix 5.2. "Daytime" = 7:00 a.m. to 10:00 p.m.; "Nighttime" = 10:00 p.m. to 7:00 a.m.
Table 5-1 provides the equivalent noise levels used to describe the daytime, evening, and nighttime ambient conditions. These daytime and nighttime energy average noise levels represent the average of all hourly noise levels observed during these time periods expressed as a single number. Appendix 5.2 provides summary worksheets of the noise levels for each of the daytime and nighttime hours.
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AHC-Skilled Nursing Facility Noise and Vibration Analysis EXHIBIT 5-A: NOISE MEASUREMENT LOCATIONS
LEGEND:
1,1
L_, Site Boundary - Measurement Locations
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AHC-Skilled Nursing Facility Noise and Vibration Analysis 6 RECEIVER LOCATIONS
To assess the potential for long-term operational and short-term construction noise impacts, the following sensitive receiver locations, as shown on Exhibit 6-A, were identified as representative locations for analysis. Sensitive receivers are generally defined as locations where people reside or where the presence of unwanted sound could otherwise adversely affect the use of the land.
Noise -sensitive land uses are generally considered to include schools, hospitals, single-family dwellings, mobile home parks, churches, libraries, and recreation areas. Moderately noise - sensitive land uses typically include multi -family dwellings, hotels, motels, dormitories, out- patient clinics, cemeteries, golf courses, country clubs, athletic/tennis clubs, and equestrian clubs. Land uses that are considered relatively insensitive to noise include business, commercial, and professional developments. Land uses that are typically not affected by noise include:
industrial, manufacturing, utilities, agriculture, undeveloped land, parking lots, warehousing, liquid and solid waste facilities, salvage yards, and transit terminals.
To describe the potential off -site Project noise levels, four receiver locations in the vicinity of the Project site were identified. The selection of receiver locations is based on FHWA guidelines and is consistent with additional guidance provided by Caltrans and the FTA, as previously described in Section 5.2. Other sensitive land uses in the Project study area that are located at greater distances than those identified in this noise study will experience lower noise levels than those presented in this report due to the additional attenuation from distance and the shielding of intervening structures. Distance is measured in a straight line from the project boundary to each receiver location.
R1: Location R1 represents the medical office building at 35900 Bob Hope Drive, approximately 152 feet north of the Project site. Since there are no private outdoor living areas (backyards) facing the Project site, receiver R1 is placed at the building fagade. A 24 -hour noise measurement was taken near this location, L1, to describe the existing ambient noise environment.
R2: Location R2 represents the existing noise sensitive residence at 35 Alicante Circle, approximately 120 feet northeast of the Project site. Receiver R2 is placed in the private outdoor living areas (backyards) facing the Project site. A 24 -hour noise measurement was taken near this location, L2, to describe the existing ambient noise environment.
R3: Location R3 represents the existing noise sensitive residence at 9 Cassis Circle, approximately 30 feet east of the Project site. Receiver R3 is placed in the private outdoor living areas (backyards) facing the Project site. A 24 -hour noise measurement was taken near this location, L3, to describe the existing ambient noise environment.
R4: Location R4 represents the existing noise sensitive residence at 7 Buckingham Way, approximately 272 feet west of the Project site. Since there are no private outdoor living areas (backyards) facing the Project site, receiver R4 is placed at the building facade. A 24 -hour noise measurement was taken near this location, L4, to describe the existing ambient noise environment.
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AHC-Skilled Nursing Facility Noise and Vibration Analysis EXHIBIT 6-A: RECEIVER LOCATIONS
LEGEND:
L-, Site Boundary ib Receiver Locations —• Distance from receiver to Project site boundary (in feet) 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis 7 OPERATIONAL NOISE IMPACTS
This section analyzes the potential stationary -source operational noise impacts at the nearest receiver locations, identified in Section 6, resulting from the operation of uses allowed by the AHC-Skilled Nursing Facility. The AHC-Skilled Nursing Facility is considered a noise -sensitive receiving land use and is not expected to include any meaningful sources of noise activity. Exhibit 7-A identifies the representative noise source locations used to assess stationary noise sources.
7.1 OPERATIONAL NOISE SOURCES
This operational noise analysis is intended to describe noise level impacts associated with the expected typical daytime and nighttime activities at the Project site. The on -site Project -related noise sources are expected to include: roof -top air conditioning units, trash enclosure activity, parking lot vehicle movements, and emergency backup generator.
7.2 REFERENCE NOISE LEVELS
To estimate the Project operational noise impacts, reference noise level measurements were collected from similar types of activities, or taken from manufactures specification sheets, to represent the noise levels expected with the development of the proposed Project. This section provides a detailed description of the reference noise levels shown on Table 7-1 used to estimate the Project operational noise impacts. It is important to note that the following projected noise levels assume the worst -case noise environment with the roof -top air conditioning units, trash enclosure activity, parking lot vehicle movements, and emergency backup generator all operating at the same time. These sources of noise activity will likely vary throughout the day.
7.2.1 MEASUREMENT PROCEDURES
Unless noted in the following descriptions, the reference noise level measurements presented in this section were collected using a Larson Davis LxT Type 1 precisions sound level meter (serial number 01146). The LxT sound level meter was calibrated using a Larson -Davis calibrator, Model CAL 200, was programmed in "slow" mode to record noise levels in "A" weighted form and was located at approximately five feet above the ground elevation for each measurement. The sound level meters and microphones were equipped with a windscreen during all measurements. All noise level measurement equipment satisfies the American National Standards Institute (ANSI) standard specifications for sound level meters ANSI S1.4-2014/IEC 61672-1:2013. (19) 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis EXHIBIT 7-A: STATIONARY SOURCE NOISE LOCATIONS
LEGEND:
122+/- PARKING SPACES TOTAL (PARCELS 1 k 2)
180.289 SF
4.14 ACRES
L-1 Site Boundary
■ Roof -Top Air Conditioning Unit • Emergency Backup Generator 0 Parking Lot Vehicle Movements
♦ Trash Enclosure Activity
6'
Existing Barrier
Existing Barrier Height (in feet)
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AHC-Skilled Nursing Facility Noise and Vibration Analysis TABLE 7-1: REFERENCE NOISE LEVEL MEASUREMENTS
Noise Sources
Noise
Source
Height
(Feet)
Min./
Hour2
Reference
Noise Level
(dBA Leq)
@ 50 Feet
Sound
Power
Level
(dBA)3
Day
Night
Roof -Top Air Conditioning Units
3'
39 28
57.2 88.9
Trash Enclosure Activity
5'
60 30
57.3 89.0
Parking Lot Vehicle Movements
5'
60 60
52.6 81.1
Emergency Backup Generator
6'
60 60
64.9 110.3
As measured by Urban Crossroads, Inc.
2Anticipated duration (minutes within the hour) of noise activity during typical hourly conditions expected at the Project site. "Daytime" = 7:00 a.m. - 10:00 p.m.; "Nighttime" = 10:00 p.m. - 7:00 a.m. 'Sound power level represents the total amount of acoustical energy (noise level) produced by a sound source independent of distance or surroundings. Sound power levels calculated using the CadnaA noise model at the reference distance to the noise source.
7.2.2 ROOF -TOP AIR CONDITIONING UNITS
To assess the noise levels created by the roof -top air conditioning units, reference noise level measurements were collected from a Lennox SCA120 series 10 -ton model packaged air conditioning unit. At the uniform reference distance of 50 feet, the reference noise level is 57.2 dBA Leq. For this noise analysis, the air conditioning units are expected to operate continuously for 60 minutes per hour and will be located four feet above the roof elevation of the Project buildings. This reference noise level describes the expected roof -top air conditioning units located 5 feet above the roof for the planned air conditioning units at the Project site.
7.2.3 TRASH ENCLOSURE ACTIVITY
To describe the noise levels associated with a trash enclosure activity, Urban Crossroads collected a reference noise level measurement at an existing trash enclosure containing two dumpster bins. The trash enclosure noise levels describe metal gates opening and closing, metal scraping against concrete floor sounds, dumpster movement on metal wheels, and trash dropping into the metal dumpster. The reference noise levels describe trash enclosure noise activities when trash is dropped into an empty metal dumpster, as would occur at the Project Site. The measured reference noise level at the uniform 50 -foot reference distance is 57.3 dBA Leq for the trash enclosure activity. The reference noise level describes the expected noise source activities associated with the trash enclosures for the Project's proposed building.
7.2.4 PARKING LOT ACTIVITIES
To describe the on -site parking lot activity a reference noise level of 52.6 dBA Leq at 50 feet is used. Parking lot activities are expected to take place during the full hour (60 minutes) throughout the daytime and evening hours with 30 minutes of activity during the nighttime hours. The parking lot noise levels are mainly due to cars pulling in and out of parking spaces in combination with car doors opening and closing.
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AHC-Skilled Nursing Facility Noise and Vibration Analysis
7.2.5 EMERGENCY BACKUP GENERATOR
To describe the noise levels associated with an emergency backup generator at the Project site, Urban Crossroads collected a reference noise level measurement of a 336 -kilowatt (kW) diesel generator. The measured reference noise level at the uniform 50 -foot reference distance is 64.9 dBA Leq. This analysis assumes the generator would operate for 10 minutes during the daytime hours reflecting that the backup generator would only be used in emergencies or when being tested for scheduled maintenance.
7.3 CADNAA NOISE PREDICTION MODEL
To fully describe the exterior operational noise levels from the Project, Urban Crossroads, Inc. developed a noise prediction model using the CadnaA (Computer Aided Noise Abatement) computer program. CadnaA can analyze multiple types of noise sources using the spatially accurate Project site plan, georeferenced Nearmap aerial imagery, topography, buildings, and barriers in its calculations to predict outdoor noise levels.
Using the ISO 9613-2 protocol, CadnaA will calculate the distance from each noise source to the noise receiver locations, using the ground absorption, distance, and barrier/building attenuation inputs to provide a summary of noise level at each receiver and the partial noise level contributions by noise source. Consistent with the ISO 9613-2 protocol, the CadnaA noise prediction model relies on the reference sound power level (LW) to describe individual noise sources. While sound pressure levels (e.g., Leq) quantify in decibels the intensity of given sound sources at a reference distance, sound power levels (LW) are connected to the sound source and are independent of distance. Sound pressure levels vary substantially with distance from the source and diminish because of intervening obstacles and barriers, air absorption, wind, and other factors. Sound power is the acoustical energy emitted by the sound source and is an absolute value that is not affected by the environment. The operational noise level calculations provided in this noise study account for the distance attenuation provided due to geometric spreading, when sound from a localized stationary source (i.e., a point source) propagates uniformly outward in a spherical pattern. A default ground attenuation factor of 0.5 was used in the noise analysis to account for mixed ground representing a combination of hard and soft surfaces.
7.4 PROJECT OPERATIONAL NOISE LEVELS
Using the reference noise levels to represent the proposed Project operations that include, Urban Crossroads, Inc. calculated the operational source noise levels that are expected to be generated from the Project site and the Project -related noise level increases that would be experienced at each of the sensitive receiver locations. Table 7-2 shows the calculated Project operational noise levels during the daytime hours of 7:00 a.m. to 6:00 p.m., evening hours of 6:00 p.m. to 10:00 p.m. and the nighttime hours of 10:00 p.m. to 7:00 a.m. Table 7-2 shows that the Project operational noise levels will range from 35.6 to 46.4 dBA Leq. 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis TABLE 7-2: PROJECT OPERATIONAL NOISE LEVELS
Receiver
Location'
Project Operational
Noise Levels (dBA Leq)2
Noise Level Standards
(dBA Leq)3
Threshold Exceeded?'
Day
Eve.
Night
Day
Eve.
Night
Day
Eve.
Night
R1
46.5 44.5
41.9 55
50 45
No
No
No
R2
44.3 39.9
37.4 55
50 45
No
No
No
R3
38.2 37.7
35.7 55
50 45
No
No
No
R4
52.5 46.0
43.7 55
50 45
No
No
No
See Exhibit 6-A for the receiver locations.
2 Proposed Project operational noise level calcu ations included in Appendix 7.1. 'City of Rancho Mirage exterior noise level standards by land use, as shown on Table 3-1. " Do the estimated Project operational noise source activities exceed the noise level standards? "Day" = 7:00 a.m. to 6:00 p.m.; "Evening" = 6:00 p.m. to 10:00 p.m.; "Night" = 10:00 p.m. to 7:00 a.m.
To demonstrate compliance with local noise regulations, the Project -only operational noise levels are evaluated against exterior noise level thresholds based on the City of Rancho Mirage exterior noise level standards at nearby noise -sensitive receiver locations. Table 7-2 shows that the operational noise levels associated with AHC-Skilled Nursing Facility Project will not exceed the City of Rancho Mirage daytime, evening, and nighttime exterior noise level standards at all nearby receiver locations. Therefore, the operational noise impacts are considered less than significant at the nearby noise -sensitive receiver locations.
7.5 PROJECT OPERATIONAL NOISE LEVEL INCREASES
To describe the Project operational noise level increases, the Project operational noise levels are combined with the existing ambient noise levels measurements for the nearby receiver locations potentially impacted by Project operational noise sources. Since the units used to measure noise, decibels (dB), are logarithmic units, the Project -stationary source and existing ambient noise levels cannot be combined using standard arithmetic equations. (2) Instead, they must be logarithmically added using the following base equation:
SPLrotai = 10Iogio[10sau/t0 + 10sPL2/10 + ... 10sPLn/1o] Where "SPL1," "SPL2," etc. are equal to the sound pressure levels being combined, or in this case, the Project operational and existing ambient noise levels. The difference between the combined Project and ambient noise levels describes the Project noise level increases to the existing ambient noise environment. Noise levels that would be experienced at receiver locations when Project -source noise is added to the daytime, evening, and nighttime ambient conditions are presented on Tables 7-3, 7-4, and 7-5, respectively. As indicated on Tables 7-3, 7-4 and 7-5, the Project will generate an unmitigated operational noise level increase ranging from 0.1 to 0.8 dBA Leg at the nearby receiver locations.
Tables 7-3, 7-4 and 7-5 show that the Project operational noise level contributions satisfy the operational noise level increase significance criteria presented in Table 4-1. Therefore, the Project related operational noise level increases at all sensitive receiver locations will be less than significant.
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AHC-Skilled Nursing Facility Noise and Vibration Analysis TABLE 7-3: DAYTIME PROJECT STATIONARY SOURCE NOISE LEVEL INCREASES Receiver
Locations
Total
Project
Operational
Noise
Lever
Measurement
Location3
Reference
Ambient
Noise
Levels'
Combined
Project
and
Ambient'
Project
Increase6
Increase
Criteria'
Increase
Criteria
Exceeded?'
R1
46.5 L1
55.2 55.7
0.5 5.0
No
R2
44.3 L2
55.5 55.8
0.3 5.0
No
R3
38.2 L3
52.7 52.9
0.2 5.0
No
R4
52.5 L4
66.1 66.3
0.2 1.5
No
See Exhibit 6-A for the receiver locations.
2 Total Project operational noise levels as shown on Table 7-2. 3 Reference noise level measurement locations as shown on Exhibit 5-A. ° Observed daytime ambient noise levels as shown on Table 5-1. 5 Represents the combined ambient conditions plus the Project activities. 6 The noise level increase expected with the addition of the proposed Project activities.
Significance Criteria as defined in Section 4.
TABLE 7-4: EVENING PROJECT STATIONARY SOURCE NOISE LEVEL INCREASES Receiver
Locations
Total
Project
Operational
Noise
Lever
Measurement
Location3
Reference
Ambient
Noise
Levels'
Combined
Project
and
Ambient'
Project
Increase6
Increase
Criteria'
Increase
Criteria
Exceeded?'
R1
44.5 L1
51.3 52.1
0.8 5.0
No
R2
39.9 L2
52.3 52.5
0.2 5.0
No
R3
37.7 L3
53.6 53.7
0.1 5.0
No
R4
46.0 L4
64.5 64.6
0.1 3.0
No
See Exhibit 6-A for the receiver locations.
2 Total Project operational noise levels as shown on Table 7-2. 3 Reference noise level measurement locations as shown on Exhibit 5-A. ° Observed evening ambient noise levels as shown on Table 5-1.
Represents the combined ambient conditions plus the Project activities. 6 The noise level increase expected with the addition of the proposed Project activities. ' Significance Criteria as defined in Section 4.
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AHC-Skilled Nursing Facility Noise and Vibration Analysis TABLE 7-5: NIGHTTIME PROJECT STATIONARY SOURCE NOISE LEVEL INCREASES Receiver
Locations
Total
Project
Operational
Noise
Level'
Measurement
Location3
Reference
Ambient
Noise
Levels'
Combined
Project
and
Ambients
Project
Increase6
Increase
Criteria'
Increase
Criteria
Exceeded?'
R1
41.9 L1
48.7 49.5
0.8 5.0
No
R2
37.4 L2
50.3 50.5
0.2 5.0
No
R3
35.7 L3
53.5 53.6
0.1 5.0
No
R4
43.7 L4
60.2 60.3
0.1 3.0
No
1 See Exhibit 6-A for the receiver locations.
Z Total Project operational noise levels as shown on Table 7-2. 3 Reference noise level measurement locations as shown on Exhibit 5-A. ° Observed nighttime ambient noise levels as shown on Table 5-1. s Represents the combined ambient conditions plus the Project activities. 6 The noise level increase expected with the addition of the proposed Project activities.
Significance Criteria as defined in Section 4.
7.6 OFF -SITE TRAFFIC NOISE ANALYSIS
Traffic generated by the operation of the proposed Project will influence the traffic noise levels in surrounding off -site areas and at the Project site. However, the off -site Project -related traffic represents an incremental increase to the existing roadway volumes, which is not expected to generate a barely perceptible noise level increase of 3 dBA CNEL at nearby sensitive land uses adjacent to study area roadways, since a doubling of the existing traffic volumes would be required to generate a 3 dBA CNEL increase. The incremental Project -related off -site traffic noise levels due to the AHC-Skilled Nursing Facility project trips are estimated at less than 1 dBA CNEL.
Due to the low traffic volumes generated by the Project, the off -site traffic noise levels generated by the Project are considered less than significant and no further analysis is required. 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis 8 CONSTRUCTION IMPACTS
This section analyzes potential impacts resulting from the short-term construction activities associated with the development of the Project. Exhibit 8-A shows the construction noise source locations in relation to the nearest sensitive receiver locations previously described in Section 8.
To prevent high levels of construction noise from impacting noise -sensitive land uses, RMMC Section 15.04.030[A][11] indicates that construction, shall be limited to the hours of 7:00 a.m. and 7:00 p.m. with no activity on Sundays and holidays (13).
8.1 CONSTRUCTION NOISE LEVELS
The FTA Transit Noise and Vibration Impact Assessment Manual recognizes that construction projects are accomplished in several different stages and outlines the procedures for assessing noise impacts during construction. Each stage has a specific equipment mix, depending on the work to be completed during that stage. As a result of the equipment mix, each stage has its own noise characteristics; some stages have higher continuous noise levels than others, and some have higher impact noise levels than others. The Project construction activities are expected to occur in the following stages:
• Site Preparation
• Grading
• Building Construction
• Paving
• Architectural Coating
8.2 CONSTRUCTION REFERENCE NOISE LEVELS
To describe construction noise activities, this construction noise analysis was prepared using reference construction equipment noise levels from the Federal Highway Administration (FHWA) published the Roadway Construction Noise Model (RCNM), which includes a national database of construction equipment reference noise emission levels. (21) The RCNM equipment database, provides a comprehensive list of the noise generating characteristics for specific types of construction equipment. In addition, the database provides an acoustical usage factor to estimate the fraction of time each piece of construction equipment is operating at full power (i.e., its loudest condition) during a construction operation. 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis EXHIBIT 8-A: TYPICAL CONSTRUCTION NOISE SOURCE LOCATIONS LEGEND:
Construction Activity cm,Receiver Locations —• Distance from receiver to Project site boundary (in feet) 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis
8.3 CONSTRUCTION NOISE ANALYSIS
Using the reference construction equipment noise levels and the CadnaA noise prediction model, calculations of the Project construction noise level impacts at the nearby sensitive receiver locations were completed. Consistent with FTA guidance for general construction noise assessment, Table 8-1 presents the combined noise levels for the loudest construction equipment, assuming they operate at the same time. As shown on Table 8-2, the construction noise levels are expected to range from 47.9 to 64.5 dBA Leq at the nearby receiver locations.
Appendix 8.1 includes the detailed CadnaA construction noise model inputs.
TABLE 8-1: CONSTRUCTION REFERENCE NOISE LEVELS
Construction
Stage
Reference
Construction
Equipmnetl
Reference Noise
Level @ 50 Feet
(dBA Leq)
Composite
Reference Noise
(dBA L Leveel
Reference
Power Level
(dBA 1_,,)3
Site
Preparation
Tractor
80 84.0
115.6
Backhoe
74 Grader
81 Grading
Scraper
80 83.3
114.9
Excavator
77 Dozer
78 Building
Construction
Crane
73 80.6
112.2
Generator
78 Front End Loader
75 Paving
Paver
74 77.8
109.5
Dump Truck
72 Roller
73 Architectural
Coating
Man Lift
68 76.2
107.8
Compressor (air)
74 Generator (<25kVA)
70 1 FHWA Road Construction Noise Model.
2 Represents the combined noise level for all equipment assuming they operate at the same time consistent with FTA Transit Noise and Vibration Impact Assessment guidance.
3 Sound power level represents the total amount of acoustical energy (noise level) produced by a sound source independent of distance or surroundings.
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AHC-Skilled Nursing Facility Noise and Vibration Analysis TABLE 8-2: CONSTRUCTION EQUIPMENT NOISE LEVEL SUMMARY
Receiver
Location'
Construction Noise Levels (dBA Ley)
Site
Preparation
Grading
Building
Construction
Paving
Architectural
Coating
Highest
Levels'
R1
62.9 62.2
59.5 56.8
55.1 62.9
R2
57.1 56.4
53.7 51.0
49.3 57.1
R3
55.7 55.0
52.3 49.6
47.9 55.7
R4
64.5 63.8
61.1 58.4
56.7 64.5
'Construction noise source and receiver locations are shown on Exhibit 8-A. 2 Construction noise level calculations based on distance from the construction activity, which is measured from the Project site boundary to the nearest receiver locations. CadnaA construction noise model inputs are included in Appendix 8.1.
8.4 CONSTRUCTION NOISE LEVEL COMPLIANCE
To evaluate whether the Project will generate potentially significant short-term noise levels at nearest receiver locations, a construction -related daytime noise level threshold of 80 dBA Leq is used as a reasonable threshold to assess the daytime construction noise level impacts. The construction noise analysis shows that the nearest receiver locations will satisfy the reasonable daytime 80 dBA Leq significance threshold during Project construction activities as shown on Table 8-3. Therefore, the noise impacts due to Project construction noise are considered less than significant at all receiver locations.
TABLE 8-3: CONSTRUCTION NOISE LEVEL COMPLIANCE
Receiver
Location'
Construction Noise Levels (dBA Ley)
Highest Construction
Noise Levels'
Threshold3
Threshold
Exceeded?'
R1
62.9 80
No
R2
57.1 80
No
R3
55.7 80
No
R4
64.5 80
No
'Construction noise source and receiver locations are shown on Exhibit 8-A. 'Highest construction noise level calculations based on distance from the construction noise source activity to the nearest receiver locations as shown on Table 8-2.
3 Construction noise level thresholds as shown on Table 4-1. ° Do the estimated Project construction noise levels exceed the construction noise level threshold? 15548-02 Noise Study
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8.5 CONSTRUCTION VIBRATION ANALYSIS
Construction activity can result in varying degrees of ground vibration, depending on the equipment and methods employed. Operation of construction equipment causes ground vibrations that spread through the ground and diminish in strength with distance. Ground vibration levels associated with various types of construction equipment are summarized on Table 8-4. Based on the representative vibration levels presented for various construction equipment types, it is possible to estimate the potential for human response (annoyance) and building damage using the following vibration assessment methods defined by Caltrans. To calculate vibration levels at distance, Caltrans provides the following equation: PPVequip = PPVref x (25/V-5
TABLE 8-4: VIBRATION SOURCE LEVELS FOR CONSTRUCTION EQUIPMENT Equipment
PPV (in/sec)
at 25 feet
Small bulldozer
0.003
Jackhammer
0.035
Loaded Trucks
0.076
Large bulldozer
0.089
Vibratory Roller
0.210
Caltrans Transportation and Construction Vibration Guidance Manual, April 2020.
Table 8-5 presents the expected Project related vibration levels at the nearby receiver building facade locations. At distances ranging from 30 to 272 feet from the building facade to the Project construction activities, construction vibration velocity levels are estimated to range from 0.006 to 0.160 in/sec PPV. Based on maximum acceptable continuous vibration threshold of 0.3 PPV (in/sec), the typical Project construction vibration levels will fall below the building damage thresholds at all the noise sensitive receiver locations. Therefore, the Project -related vibration impacts are considered less than significant during typical construction activities at the Project site. Moreover, the vibration levels reported at the sensitive receiver locations are unlikely to be sustained during the entire construction period but will occur rather only during the times that heavy construction equipment is operating adjacent to the Project site perimeter. 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis TABLE 8-5: PROJECT CONSTRUCTION VIBRATION LEVELS
Location'
Distance
to Const
Activity
(Feet ) z
Typical Construction Vibration Levels
PPV (in/sec)3
Thresholds
PPV
(in/sec)4
Thresholds
Exceeded?'
Small
bulldozer
Jack-
hammer
Loaded
Trucks
Large
bulldozer
Vibratory
Roller
Highest
Vibration
Level
R1
152'
0.000
0.002
0.005
0.006
0.014
0.014
0.3 No
R2
120'
0.000
0.003
0.007
0.008
0.020
0.020
0.3 No
R3
30'
0.002
0.027
0.058
0.068
0.160
0.160
0.3 No
R4
272'
0.000
0.001
0.002
0.002
0.006
0.006
0.3 No
1 Construction noise source and receiver locations are shown on Exhibit 8-A. 'Distance from receiver building facade to Project construction boundary Project site boundary). 3 Based on the Vibration Source Levels of Construction Equipment (Table 8-4). 4Caltrans Transportation and Construction Vibration Guidance Manual, April 2020, Table 19, p. 38. 5 Does the peak vibration exceed the acceptable vibration thresholds? "PPV" = Peak Particle Velocity
Moreover, the impacts at the site of the nearest sensitive receiver locations are unlikely to be sustained during the entire construction period but will occur rather only during the times that heavy construction equipment is operating adjacent to the Project site perimeter. 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis 9 REFERENCES
1. State of California. California Environmental Quality Act, Appendix G. 2018.
2. California Department of Transportation Environmental Program. Technical Noise Supplement - A Technical Supplement to the Traffic Noise Analysis Protocol. Sacramento, CA : s.n., September 2013.
3. Environmental Protection Agency Office of Noise Abatement and Control. Information on Levels of Environmental Noise Requisite to Protect Public Health and Welfare with an Adequate Margin of Safety. March 1974. EPA/ONAC 550/9/74-004.
4. U.S. Department of Transportation, Federal Highway Administration, Office of Environment and Planning, Noise and Air Quality Branch. Highway Traffic Noise Analysis and Abatement Policy and Guidance. December 2011.
5. U.S. Department of Transportation Federal Highway Administration. Highway Noise Barrier Design Handbook. 2001.
6. U.S. Department of Transportation, Federal Highway Administration. Highway Traffic Noise in the United States, Problem and Response. April 2000. p. 3.
7. U.S. Environmental Protection Agency Office of Noise Abatement and Control. Noise Effects Handbook -A Desk Reference to Health and Welfare Effects of Noise. October 1979 (revised July 1981).
EPA 550/9/82/106.
8. U.S. Department of Transportation, Federal Transit Administration. Transit Noise and Vibration Impact Assessment Manual. September 2018.
9. Office of Planning and Research. State of California General Plan Guidelines. October 2017.
10. State of California. California Code of Regulations, Title 24, Part 2, Volume 1, Chapter 12, Section 1206.4, Allowable Interior Noise Level. ICC Digital Coes. [Online] 2019. https://codes.iccsafe.org/content/CABCV12019/chapter-12-interior-environment .
11. -. 2019 California Green Building Standards Code. January 2020.
12. City of Rancho Mirage. Municipal Code, Chapter 8.45 Noise.
13. -. Municipal Code, Sections 15.04.030.
14. -. General Plan Update Draft Environmental Impact Report. 2005.
15. California Department of Transportation. Transportation and Construction Vibration Guidance Manual. April 2020.
16. California Court of Appeal. Gray v. County of Madera, F053661. 167 Cal.App.4th 1099; - Cal.Rptr.3d, October 2008.
17. Federal Interagency Committee on Noise. Federal Agency Review of Selected Airport Noise Analysis Issues. August 1992.
18. California Department of Transportation. Technical Noise Supplement. November 2009.
19. American National Standards Institute (ANSI). Specification for Sound Level Meters ANSI 51.4- 2014/IEC 61672-1:2013.
20. City of Perris. Municipal Code, Chapter 7.34 Noise Control.
21. U.S. Department of Transportation, Federal Highway Administration, Office of Environment and Planning. FHWA Roadway Construction Noise Model. January, 2006. 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis 10 CERTIFICATION
The contents of this noise study report represent an accurate depiction of the noise environment and impacts associated with the proposed AHC-Skilled Nursing Facility Project. The information contained in this noise study report is based on the best available data at the time of preparation.
If you have any questions, please contact me directly at (949) 584-3148.
Bill Lawson, P.E., INCE
Principal
URBAN CROSSROADS, INC.
1133 Camelback #8329
Newport Beach, CA 92658
(949) 581-3148
[email protected]
EDUCATION
3 FESS!
°WARD,_
No. TR 2537
`s_1RAFFIC
'OF CA10
Master of Science in Civil and Environmental Engineering California Polytechnic State University, San Luis Obispo • December, 1993 Bachelor of Science in City and Regional Planning
California Polytechnic State University, San Luis Obispo • June, 1992
PROFESSIONAL REGISTRATIONS
PE — Registered Professional Traffic Engineer — TR 2537 • January, 2009 AICP — American Institute of Certified Planners — 013011 • June, 1997 —January 1, 2012 PTP — Professional Transportation Planner • May, 2007 — May, 2013 INCE — Institute of Noise Control Engineering • March, 2004
PROFESSIONAL AFFILIATIONS
ASA — Acoustical Society of America
ITE — Institute of Transportation Engineers
PROFESSIONAL CERTIFICATIONS
Certified Acoustical Consultant — County of San Diego • March, 2018 Certified Acoustical Consultant — County of Orange • February, 2011 FHWA-NHI-142051 Highway Traffic Noise Certificate of Training • February, 2013 15548-02 Noise Study
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AHC-Skilled Nursing Facility Noise and Vibration Analysis APPENDIX 3.1:
CITY OF RANCHO MIRAGE MUNICIPAL CODE
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11/1/2020 Chapter 8.45 NOISE
Rancho Mirage Municipal Code
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Title 8 HEALTH AND SAFETY
Chapter 8.45 NOISE
845.010 Purpose.
The city has established a quality of life and environment in which peace and quiet is highly valued by its residents, visitors and businesses. The existence of excessive noise within the city is a condition which is detrimental to the health, safety, comfort, welfare and quality of life of the citizenry and shall be regulated in the public interest. This chapter has been created to implement the goals and policies of the noise element of the city's general plan and to prohibit undesirable noises in the community. This chapter shall be referred to and cited as the Rancho Mirage noise ordinance. (Ord. 633 § 1(Exh. A), 1995)
8.45.020 Definitions.
Ambient noise level means the all encompassing noise level associated with a given environment, being a composite of sounds from all sources, excluding the alleged offensive noise, at the location and approximate time at which a comparison with the alleged offensive noise is to be made.
Cumulative period means an additive period of time consisting of individual time segments which may be continuous or interrupted.
Decibel (dBA) means a unit of sound level measured on a sound level meter using the A -weighting network.
Emergency means any occurrence or set of circumstances involving actual or imminent physical danger, crisis, trauma or property damage which demands immediate action.
Noise level means the same as sound level the terms are interchangeable.
Person means any individual, association, partnership, corporation, organization, or public agency, including associated officer(s), employee(s) or department(s).
Sound level means the quantity of decibels measured using the frequency weighting of A of a sound level meter.
Sound level meter means an instrument meeting the American National Standards Institute's standard S1.4-1983 or later revision, for Type 1 or Type 2 specifications; or an instrument and the associated recording and analyzing equipment which will provide equivalent data. (Ord. 633 § 1(Exh. A), 1995)
8.45.030 Exterior noise level limits.
No person shall operate or cause to be operated any source of sound or allow the creation of sound or noise on property owned, leased, occupied or otherwise controlled by such person which causes the noise level, as measured on any other property, to exceed:
A. The noise level for the applicable zone specified in Table A-1 for a cumulative period of more than thirty minutes in any hour of the applicable time period.
Table A-1
Land Use/Zone
Residential, Low Density (R -E, H -R, R -L-2, R -L-3)
Residential, Medium and High Density, Hospital, Open
Space (OS, R -M, R -H, MHP)
Time of Day
7:00 a.m. to 6:00 p.m.
6:00 p.m. to 10:00 p.m.
10:00 p.m. to 7:00 a.m.
7:00 a.m. to 6:00 p.m.
6:00 p.m. to 10:00 p.m.
Noise Level (dBA)
55 50
45 60
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Chapter 8.45 NOISE
10:00 p.m. to 7:00 a.m.
50 7:00 a.m. to 6:00 p.m.
65 Commercial Office, Resort Commercial, Mixed Use,
Institutional (0, P, Rs -H, M -U)
6:00 p.m. to 10:00 p.m.
60 10:00 p.m. to 7:00 a.m.
55 7:00 a.m. to 6:00 p.m.
70 Commercial Neighborhood, General Commercial,
Commercial Recreation, Light Industrial (C -N, C -G, I -L) 6:00 p.m. to 10:00 p.m.
65 10:00 p.m. to 7:00 a.m.
60 B. For cumulative periods of time less than thirty minutes in an hour, all the noise standards in Table A-1 are increased according to Table B-1.
Table B-1
Duration of Sound
dBA Adjustment
15-30 minutes per hour
+ 3
10-15 minutes per hour
+ 5
5-10 minutes per hour
+ 10
1-5 minutes per hour
+ 15
Any period of time less than 1 minute per hour
+ 20
C. If the measured ambient noise level exceeds the dBA limits in Table A-1, the noise limits and their adjustments for the first three categories in Table B-1 shall be increased in five dBA increments as needed to encompass or reflect said ambient noise level. The maximum noise level under the last two categories in Table B-1 shall be increased, if necessary, only to equal the ambient noise level. (Ord. 1015 § 2, 2011; Ord. 633 § 1(Exh. A), 1995)
8.45.040 Noise level measurement.
A. The location selected for measuring exterior noise levels shall be at the point of the property line of the affected property nearest the alleged offending noise source. If possible, the ambient noise shall be measured at the same location along the property line.
B. If the measurement location is on a boundary between two different locations, the noise level limit applicable to the lower noise zone shall apply.
C. Upon receipt of a complaint or a request to investigate, the code compliance officer, equipped with an American National Standards Institute Type 2 or better sound level meter, may investigate the complaint. The investigation shall consist of measurements and the gathering of data to adequately define the noise problem and shall include the following:
1. Type and measurement of noise source;
2. Location of noise source relative to complainant's or affected property;
3. Time period during which noise source is considered to be intrusive;
4. Total duration of noise levels measured;
5. Date(s) and time(s) of noise measurement survey. (Ord. 633 § 1(Exh. A), 1995)
8.45.050 Special provisions and exemptions.
The following activities and noise sources shall be exempted from the provisions of this chapter:
A. School bands, school athletic and other activities occurring on a school campus; 48 https://www.qcode.us/codes/ranchomirage/
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11/1/2020 Chapter 8.45 NOISE
B. Outdoor gatherings, dance, shows, entertainment for events authorized through the city's special events process; C. Activities conducted in public parks and public playgrounds that are dependent upon such facilities for their operation;
D. Any emission of sound for purposes of alerting persons to an emergency or the general emission of sound during performance of emergency work;
E. Construction, alteration, repair, grading or improvement of any building, structure, road or improvement to real property for which a permit has been issued by the city if said construction occurs within the allowable hours set forth in Section 15.04.030(A)(10);
F. The operation of any equipment and machinery at any time within any zone by the city, its employees, or any agent or franchisee of the city in the course of performing maintenance, construction or trash collection. (Ord. 633 § 1(Exh. A), 1995)
8.45.060 Additional prohibition.
It is unlawful and a nuisance for any person to keep, maintain or permit upon any lot or parcel of land within the city under his or her control any animal, including any fowl, which by any sound or cry shall habitually disturb the peace and comfort of any person in the reasonable and comfortable enjoyment of life or property. (Ord. 633 § 1(Exh. A), 1995)
8.45.065 Landscape maintenance.
A. It is unlawful and a public nuisance for any person to permit or perform for -hire landscape and non- emergency exterior hardscape maintenance activities such as, but not limited to, tree trimming, re -seeding, lawn mowing, leaf blowing, dust and debris clearing and any other landscaping or nonemergency exterior hardscape maintenance activities which utilize any motorized saw, sander, drill, grinder, leaf -blower, lawnmower, hedge trimmer, edger, or any other similar tool or device any time on Saturday and Sunday and between the hours of six p.m. and seven a.m. the next day during weekdays, unless otherwise provided in this section.
B. The regular mowing or grooming of golf courses, grass tennis courts, grass croquet courts, and lawn bowling areas shall be exempt from the restrictions set forth in this section. The allowed work hours for mowing or green preparation for golf courses, grass tennis courts, grass croquet courts, and lawn bowling areas shall be between five thirty a.m. and seven p.m., seven days per week and during all seasons of the year.
C. Nothing set forth in this section shall permit any person from engaging in any activities that exceed the exterior noise level limits set forth in Section 8.45.030 or otherwise constitute a public nuisance as set forth in Section 14.60.325 of the Municipal Code. (Ord. 979, § 1, 2009; Ord. 936, § 3, 2006)
8.45.070 Administration.
The noise control program established by this chapter shall be administered by and is the responsibility of the code compliance division as directed by the director of the community development department. (Ord. 633 § 1(Exh. A), 1995)
8.45.080 Violations and enforcement procedures.
Violations of this chapter are declared to be a nuisance and subject to the procedures, remedies and penalties set forth in Title 14. (Ord. 916 §4, 2006; Ord. 633 § 1(Exh. A), 1995) View the mobile version.
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11/1/2020 15.04.030 Adoption, modifications, amendments and deletions to Chapter 1 of the Building Code.
Rancho Mirage Municipal Code
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Title 15 BUILDINGS AND CONSTRUCTION
Chapter 15.04 CALIFORNIA BUILDING CODE, 2019 EDITION
15.04.030 Adoption, modifications, amendments and deletions to Chapter 1 of the Building Code.
A. Except as otherwise provided in this chapter, the California Building Code, Title 24, California Code of Regulations, Part 2, Volume 1, Chapter 1, Division II, "Scope and Administration," including any and all amendments thereto that may hereafter be made and adopted by the state of California, is hereby adopted as the Administrative Code of the city. This administrative chapter shall apply to all codes listed in this title.
1. Section 101.1 is deleted in its entirety.
2. Section 101.5 is added to define the term "Holiday" and shall read as follows:
101.5 Holidays. "Holiday" as used in the Building Code shall mean New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving, and Christmas.
3. Section 102.2 is amended to read as follows:
102.2 Other laws. The provisions of this code shall not be deemed to nullify any provisions of local, state or federal law.
In the event of discrepancies between this chapter and Chapter 1, General Code Provision, the latter shall take precedence.
4. Section 103.1 is amended to read as follows:
103.1 Creation of enforcement agency. There is established within the City, a division of the Administrative Services Department to be known as the "Building and Safety Division" which shall be under the administrative and operational control of the City Building Official hereinafter referred to as the building official.
5. Section 105.2 is amended by adding a new exemption to the list of structures for which a permit shall not be required:
14. Masonry freestanding block walls not over 30" above grade. (The other provisions of Section 105.2 remain the same)
6. Section 105.5 is amended to read as follows:
105.5 Expiration. Every permit issued shall become invalid unless the work on the site authorized by such permit is commenced within 180 days after its issuance, or if the work authorized on the site by such permit is suspended or abandoned for a period of 180 days after the time the work is commenced. The building official is authorized to grant, in writing, one or more extensions of time, for periods not more than 180 days each. The extension shall be requested in writing and justifiable cause demonstrated.
Exception: For residential occupancies a permit shall remain valid for the purposes of this part if the work on the site authorized by that permit is commenced within 12 months after its issuance, unless the permittee has abandoned the work authorized by the permit.
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11/1/2020 15.04.030 Adoption, modifications, amendments and deletions to Chapter 1 of the Building Code.
7. Section 109.1 is amended to read as follows:
109.1 Payment of fees. On buildings, structures, electrical, gas, mechanical, and plumbing systems or alterations requiring a permit under this Building Code, a fee for each permit shall be paid as required, in accordance with the fees set forth in the City of Rancho Mirage Master Fee Schedule, a copy of which is on file with the Division of Building and Safety.
8. Section 113.4 is added to provide for the filing of appeals and shall read as follows:
113.4 Filing of appeals. All appeals shall be made in writing and shall specify the order, decision or determination made by the building official which is being appealed and wherein the building official erred in making the order, decision or determination. The appeal shall be accompanied by a fee as established by the City Council. If, after reviewing the information submitted, the building official determines the appeal does not merit a change in his or her order, decision, or determination, the building official shall schedule a hearing by the Appeals Board and the appellant shall be notified in writing of the date and time of the hearing.
9. Section 114 is amended to read as follows:
Section 114 VIOLATIONS.
114.1 Unlawful acts. It shall be unlawful for any person, firm, or corporation to erect, construct, alter, extend, repair, move, remove, demolish or occupy any building, structure or equipment regulated by this code, or to cause the same to be done, in conflict with or in violation of any provisions of this code. It shall be unlawful for any person to erect, construct, alter or repair a building or structure in violation of the approved construction documents or directive of the building official or of a permit or certificate issued under the provisions of this code. 114.2 Public nuisance; Abatement. Any violation of this Building Code, including the adopted appendices, is a public nuisance and may be abated in accordance with Title 14 of the City's Municipal Code. 114.3 Penalties. Any person who violates a provision of this Building Code, including the adopted appendices, or fails to comply with any of the requirements thereof or who erects, constructs, alters or repairs a building or structure in violation of the approved construction documents or directive of the building official, or of a permit or certificate issued under the provisions of this Building Code shall be guilty of an infraction violation, and the violator shall be subject to the provisions set forth in Chapter 14.100 (Infractions) of the City's Municipal Code, including, but not limited to, the imposition of any and all civil and criminal penalties set forth therein.
10. Section 116 is amended to read as follows:
Section 116 UNSAFE STRUCTURES AND EQUIPMENT.
116.1 Conditions. Structures or existing equipment that are or hereafter become unsafe, unsanitary or deficient because of inadequate means of egress facilities, inadequate light and ventilation, or which constitute a fire hazard, or are otherwise dangerous to human life or the public welfare, or that involve illegal or improper occupancy or inadequate maintenance shall be deemed an unsafe condition.
116.1.1 Unlawful acts. It shall be unlawful for any person, firm, or corporation to maintain as unsafe structures or equipment regulated by this code, or cause the same to be done in conflict with or in violation of any provisions of this 51 11-612
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11/1/2020 15.04.030 Adoption, modifications, amendments and deletions to Chapter 1 of the Building Code. code.
11. Section 117 is added to limit the hours of construction work and shall read as follows:
Section 117 HOURS OF WORK.
117.1. Restricted hours; Construction work. Except as otherwise provided herein, no person other than the person actually occupying any buildings to be altered, repaired or improved, shall be engaged or employed, nor shall any person cause any other person to be engaged or employed in any work of construction, erection, alteration, repair, addition to or improvement of any building, structure, road or improvement to realty, between the hours of seven p.m. of each day and seven a.m. of the next succeeding day or on Sundays and holidays, without written permission of the Building Official being first obtained. The Building Official may grant permission to work during those periods under appropriate circumstances after first having determined that such work will not unduly or unreasonably interfere with the peaceful enjoyment of property adjacent to such work.
117.2 Restricted hours; Landscape maintenance. Within gated communities, shopping centers, commercial centers, vacant residential or commercial parcels, or developed residential or commercial parcels, landscape activities such as leaf blowing, tree trimming, re -seeding, or mowing of grass as associated with the re -seeding process and any other landscaping activities which generate unusual noise, are prohibited between the hours of seven p.m. of each day and seven a.m. of the next succeeding day or on Sundays or on holidays. 117.3 Restricted hours; Golf courses. In order to assure the excellence and readiness of golf courses within the City, mowing and green preparation of golf courses is permitted between 5:30 a.m. and 7 p.m., seven days per week and during all seasons of the year.
12. Section 118 is added to require removal and disposal of trash and debris at building sites and shall read as follows:
Section 118 REMOVAL AND DISPOSAL OF TRASH AND DEBRIS.
118.1 Required removal. Any person to whom a building permit has been issued shall keep the building site free and clear of trash and debris. As used in this section, trash and debris shall include papers, cartons, bottles, cans, garbage, roofing materials, plaster, concrete and other substances that may accumulate as a result of construction activities. 118.2 Container. A trash container shall be located on every construction site and shall remain in place until construction is completed. The container shall be adequate in size to store the trash and debris generated on the building site until it can be removed.
118.3 Disposal. Trash and debris shall be removed from the site and transported to a legally established dump site either by the City's refuse contractor or the permittee.
(Ord. 1161 § 3, 2019; Ord. 1109 § 3, 2016; Ord. 1075 § 2, 2013; Ord. 1051 § 1, 2012; Ord. 1001 § 2, 2010; Ord. 973 § 1, 2009; Ord. 961 § 2, 2007)
View the mobile version.
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AHC-Skilled Nursing Facility Noise and Vibration Analysis APPENDIX 5.1:
STUDY AREA PHOTOS
15548-02 Noise Study
53 O URBAN
11-614
AHC-Skilled Nursing Facility Noise and Vibration Analysis This page intentionally left blank
15548-02 Noise Study
54 O URBAN
11-615
JN:15548
15548_L1_B 1.North
33, 47 21.200000"116, 24' 18.540000"
15548_L1_B 2.5outh
33, 47' 21.170000"116, 24' 18.460000"
15548_L1_B 3.East
33, 47' 21.190000"116, 24' 18.440000"
55 15548_L1_B 4.West
33, 47' 21.310000"116, 24' 18.520000"
11-616
JN:15548
15548_L2_D 1.North
33, 47 20.710000"116, 24' 15.940000"
15548_12_D 2.5outh
33, 47' 20.580000"116, 24' 15.830000"
15548_12_D 3.East
33, 47 20.540000"116, 24' 15.800000"
56 15548_12_D 4.West
33, 47' 20.640000"116, 24' 15.910000"
11-617
JN:15548
15548_L3_E 1.North
33, 47 18.730000"116, 24' 16.570000"
15548_L3_E 2.5outh
33, 47' 18.670000"116, 24' 16.590000"
15548_L3_E 3.East
33, 47 18.660000"116, 24' 16.570000"
57 15548_L3_E 4.West
33, 47' 18.590000"116, 24' 16.540000"
11-618
JN:15548
15548_L4_F 1.North
33, 47 17.490000"116, 24' 20.800000"
15548_L4_F 2.5outh
33, 47' 17.550000"116, 24' 20.880000"
15548_L4_F 3.East
33, 47 17.560000"116, 24' 20.880000"
58 15548_L4_F 4.West
33, 47' 17.560000"116, 24' 20.910000"
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AHC-Skilled Nursing Facility Noise and Vibration Analysis APPENDIX 5.2:
NOISE LEVEL MEASUREMENT WORKSHEETS
15548-02 Noise Study
59 ` o URBAN
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15548-02 Noise Study
60 O URBAN
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24 -Hour Noise Level Measurement Summary
Date: Wednesday, June 28, 2023
Project: Advanced Healthcare
Location: L1 - Located north of the site near the medical building at Source: 35900 Bob Hope Dr.
Meter: Piccolo II
JN: 15548
Analyst: Z. Ibrahim
Hourly L e, dBA Readings (unadjusted)
85.0 80.0
m 75.0
-o 70.0
65.0 60.0
T 55.0
50.0 o 45.0
= 40.0
35.0 N
ei
ei
M
N
M
00,_
. . .
. . . .
�
in
n
to
'1
r`
00 M
l0
US
N
N
N
U)
'
0 fir
'
M
M
M
in
N
N
N
�f1
N
M
ri
- Qj '_
0 1 2 3 4 5 6 7 8 9 10 11 12 13
Hour Beginning
14 15
16 17
18 19 20
21 22 23
Timeframe
Night
Hour
0 1
2 3
4 5
6 L eq
44.1 44.5
44.7 44.3
46.8 51.1
53.8 L max
53.2 54.1
53.7 51.5
53.8 58.0
61.9 L„„
35.6 36.6
37.6 38.0
40.1 43.9
46.8 L1%
52.8 53.7
53.4 51.3
53.5 57.5
61.2 L2%
52.3 53.2
53.0 50.8
53.1 57.1
60.7 L5%
50.7 51.5
51.0 49.7
52.0 56.0
59.0 L8%
49.2 49.5
49.5 48.7
51.1 55.1
57.5 L25%
43.8 43.6
44.5 44.8
47.7 52.2
54.4 L50%
39.6 40.4
41.3 41.9
44.7 49.1
51.9 L90%
36.7 37.5
38.5 39.0
41.2 45.2
48.3 L95%
36.2 37.1
38.1 38.5
40.7 44.6
47.6 L99%
35.8 36.7
37.7 38.1
40.3 44.0
47.0 L eq
44.1 44.5
44.7 44.3
46.8 51.1
53.8 Adj.
10.0 10.0
10.0 10.0
10.0 10.0
10.0 Adj. L eQ
54.1 54.5
54.7 54.3
56.8 61.1
63.8 Day
7 8
9 10
11 12
13 14
15 16
17 18
54.1 53.7
53.6 53.1
52.7 52.8
52.3 61.7
56.6 52.2
53.7 51.2
62.0 60.2
60.2 61.9
60.3 63.0
59.8 70.7
67.7 60.2
63.8 58.4
47.2 47.5
48.4 46.7
45.7 46.1
46.0 48.3
44.2 44.4
44.0 43.7
61.6 59.8
59.8 61.3
59.9 62.1
59.4 70.0
67.4 59.8
63.3 58.0
61.0 59.3
59.2 60.4
59.5 60.8
58.9 69.5
66.9 59.2
62.6 57.6
59.4 58.1
57.7 58.3
57.9 57.8
57.4 68.2
64.7 57.7
60.7 56.3
58.0 57.3
56.7 56.9
57.0 56.0
56.3 66.8
61.4 56.5
59.0 55.1
54.5 54.5
54.3 53.5
53.2 53.0
52.9 62.4
53.9 52.7
52.4 52.1
52.3 52.2
52.5 50.9
50.5 50.6
50.6 58.3
50.3 50.2
50.0 49.4
48.7 49.0
49.6 47.8
46.9 47.2
47.1 50.5
45.8 46.0
45.4 45.1
48.0 48.4
49.1 47.3
46.4 46.7
46.5 49.2
45.1 45.3
44.8 44.5
47.4 47.8
48.6 46.8
45.8 46.2
46.1 48.6
44.4 44.6
44.2 43.8
54.1 53.7
53.6 53.1
52.7 52.8
52.3 61.7
56.6 52.2
53.7 51.2
0.0 0.0
0.0 0.0
0.0 0.0
0.0 0.0
0.0 0.0
0.0 0.0
54.1 53.7
53.6 53.1
52.7 52.8
52.3 61.7
56.6 52.2
53.7 51.2
Evening
19 20
21 51.0
52.0 50.7
59.6 61.0
61.4 42.6
45.2 41.6
59.2 60.6
60.9 58.6
59.8 60.2
56.8 57.7
57.3 55.4
55.8 55.6
51.6 52.0
49.5 48.2
49.5 46.4
43.9 46.5
42.7 43.3
46.0 42.2
42.8 45.4
41.7 51.0
52.0 50.7
5.0 5.0
5.0 56.0
57.0 55.7
Night
Timeframe
22 23
Hour
48.5 49.0
Lea
51.2 61.7
55.2 58.1
58.9 L max
40.3 40.1
L min
57.4 58.7
L1 %
56.7 58.3
L2%
54.6 56.2
L5%
52.6 54.1
L8%
48.4 47.7
L25%
45.2 44.5
L50%
41.5 41.3
L90%
41.0 40.8
L95%
40.5 40.2
L99%
Day
Min
Max
Energy Average
58.4 43.7
70.7 48.4
Average:
58.0 70.0
61.9 57.6
69.5 61.2
56.3 68.2
59.5 55.1
66.8 58.1
52.1 62.4
54.1 49.4
58.3 51.5
45.1 50.5
47.4 44.5
49.2 46.8
43.8 48.6
46.2 Evening
Min
Max
Energy Average
50.7 52.0
51.3 59.6
61.4 41.6
45.2 Average:
59.2 60.9
60.2 58.6
60.2 59.5
56.8 57.7
57.3 55.4
55.8 55.6
49.5 52.0
51.0 46.4
49.5 48.0
42.7 46.5
44.4 42.2
46.0 43.8
41.7 45.4
43.3 48.5
49.0 Daytime
(7am-7pm)
10.0 10.0
58.5 59.0
L ea (dBA)
Evening Nighttime
(7pm-lOpm) (10pm-7am)
55.2 51.3 48.7
24 -Hour
Night
Min
Max
Energy Average
44.1 53.8
48.7 51.5
61.9 Average:
35.6 46.8
51.3 61.2
55.5 50.8
60.7 55.0
49.7 59.0
53.4 48.7
57.5 51.9
43.6 54.4
47.5 39.6
51.9 44.3
36.7 48.3
41.0 36.2
47.6 40.5
35.8 47.0
40.0 53.2
Z:\Shared\UciobsL15100-15500L15500\15548\04_Noise\Fieldwork\Measurements\15548 L1_B DEN 61 C!!1° CROSSROADS
URBAN
24 -Hour Noise Level Measurement Summary
Date: Wednesday, June 28, 2023
Project: Advanced Healthcare
Location: L2 - Located northeast of the site near the residence at 35 Source: Alicante Cir.
Meter: Piccolo II
JN: 15548
Analyst: Z. Ibrahim
Hourly L eq dBA Readings (unadjusted)
85.0 80.0
75.0 70.0
65.0 60.0
T 55.0
50.0 o 45.0
= 40.0
35.0 �O
N
O
r.
a1
a -I
a1
to
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to
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471
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M'
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f�11
111 _�
��f1
in
M
in
in
in
in
I-
0 1 2 3 4 5 6 7 8 9 10 11 12 13
Hour Beginning
14 15
16 17
18 19
20 21
22 23
Timeframe
Night
Hour
0 1
2 3
4 5
6 L eq
43.9 44.1
43.9 43.6
47.2 54.7
56.0 L Max
53.3 53.4
52.2 51.1
55.5 65.9
65.0 L min
37.5 38.1
38.7 38.8
41.2 45.4
48.7 LI%
52.8 52.8
51.7 50.6
55.2 65.3
64.6 L2%
52.0 51.8
50.9 50.0
54.7 64.2
64.0 L5%
49.7 49.9
49.0 48.3
52.9 61.5
61.9 L8%
48.1 48.4
47.6 47.1
51.3 60.3
60.0 L25%
43.6 43.9
44.0 44.0
47.3 52.5
55.8 L50%
41.2 41.3
41.8 41.8
45.0 50.0
53.4 L90%
38.4 38.9
39.6 39.7
42.0 46.9
50.3 L95%
38.0 38.6
39.2 39.3
41.7 46.4
49.6 L99%
37.6 38.2
38.8 38.9
41.3 45.5
48.9 L eq
43.9 44.1
43.9 43.6
47.2 54.7
56.0 Adj.
10.0 10.0
10.0 10.0
10.0 10.0
10.0 Adj. L eQ
53.9 54.1
53.9 53.6
57.2 64.7
66.0 Day
7 8
9 10
11 12
13 14
15 16
17 18
55.6 54.8
54.6 55.4
53.6 55.7
55.7 56.0
55.4 54.7
58.7 52.2
64.9 64.5
64.4 66.5
63.0 65.0
64.5 66.6
64.7 64.7
71.0 60.2
47.4 44.3
45.8 43.1
43.0 48.1
50.5 45.7
47.7 45.7
45.2 44.9
64.6 64.0
64.0 66.2
62.7 64.7
64.2 66.3
64.4 64.3
70.8 59.8
64.0 63.6
63.6 65.7
62.2 64.2
63.6 65.9
63.9 63.7
69.9 59.3
62.0 61.8
61.4 63.0
60.4 62.5
61.7 63.6
62.0 61.6
66.5 57.8
58.0 58.3
56.7 60.1
60.1 59.3
60.6 58.7
60.7 59.8
61.3 60.2
59.5 63.5
56.5 55.3
54.3 54.0
53.2 53.5
55.2 55.0
54.0 54.7
53.9 54.0
52.5 52.0
49.9 50.5
48.9 48.9
51.8 53.1
49.9 51.8
50.6 50.4
50.1 48.6
45.7 46.8
44.2 44.3
49.2 51.1
46.9 48.7
47.0 46.7
46.2 48.0
45.1 46.4
43.7 43.7
49.0 50.9
46.4 48.3
46.4 46.0
45.6 47.5
44.5 45.9
43.2 43.1
48.2 50.6
45.9 47.9
45.9 45.4
45.0 55.6
54.8 54.6
55.4 53.6
55.7 55.7
56.0 55.4
54.7 58.7
52.2 0.0
0.0 0.0
0.0 0.0
0.0 0.0
0.0 0.0
0.0 0.0
0.0 55.6
54.8 54.6
55.4 53.6
55.7 55.7
56.0 55.4
54.7 58.7
52.2 Evening
19 20
21 52.1
53.5 50.8
60.9 62.3
63.0 44.7
49.3 43.1
60.6 61.7
62.1 60.1
60.7 60.7
56.3 56.7
54.5 52.2
53.2 49.4
49.1 51.7
46.8 45.7
50.0 44.0
45.2 49.7
43.6 44.7
49.4 43.2
52.1 53.5
50.8 5.0
5.0 5.0
57.1 58.5
55.8 Night
Timeframe
22 23
Hour
47.9 48.7
L ea
52.2 58.7
55.5 56.3
59.6 L max
41.8 41.4
L min
55.8 58.9
LI %
55.2 57.8
L2%
53.2 54.9
L5%
51.8 52.4
L8%
48.0 47.5
L25%
45.8 45.1
L50%
43.1 42.4
L90%
42.6 42.0
L95%
42.0 41.6
L99%
Day
Min
Max
Energy Average
60.2 43.0
71.0 50.5
Average:
59.8 70.8
64.7 59.3
69.9 64.1
57.8 66.5
62.0 56.5
63.5 60.0
52.5 55.3
54.1 48.9
53.1 50.7
44.2 51.1
47.1 43.7
50.9 46.6
43.1 50.6
46.1 Evening
Min
Max
Energy Average
50.8 53.5
52.3 60.9 43.1
63.0 49.3
Average:
60.6 62.1
61.5 60.1
60.7 60.5
56.7 58.3
57.7 54.5
56.7 55.8
49.4 53.2
51.6 46.8
51.7 49.2
44.0 50.0
46.6 43.6
49.7 46.2
43.2 49.4
45.8 47.9
48.7 Daytime
(7am-7pm)
10.0 10.0
57.9 58.7
L ea (dBA)
Evening Nighttime
(7pm-lOpm) (10pm-7am)
55.5 52.3 50.3
24 -Hour
Night Min
Max
Energy Average
43.6 56.0
50.3 51.1
65.9 Average:
37.5 48.7
50.6 65.3
56.4 50.0
64.2 55.6
48.3 61.9
53.5 47.1
60.3 51.9
43.6 55.8
47.4 41.2
53.4 45.0
38.4 50.3
42.4 38.0
49.6 41.9
37.6 48.9
41.4 53.8
Z: \Shared\UciobsL15100-15500L15500\15548\04_Noise\Fieldwork\Measurements\15548 L2_DDEN 62 C!!1° CROSSROADS
URBAN
24 -Hour Noise Level Measurement Summary
Date: Wednesday, June 28, 2023
Project: Advanced Healthcare
Location:
Source:
L3 - Located east of the site near the residence at 9 Cassis Cir.
Meter: Piccolo II
JN: 15548
Analyst: Z. Ibrahim
Hourly L e, dBA Readings (unadjusted)
85.0 80.0
m 75.0
-o 70.0
65.0 60.0
T 55.0
50.0 o 45.0
= 40.0
35.0 N
-f
_ ..
N
N
N
-
UO
.
'
cr
ei
O
R
O
cn
to
in
mi
in
ni
i
in
0 1 2 3 4 5 6 7 8 9 10 11 12 13
Hour Beginning
14 15
16 17
18 19
20 21
22 23
Timeframe
Night
Hour
0 1
2 3
4 5
6 L eq
46.2 49.1
49.5 51.6
53.0 57.3
56.6 L max
53.1 57.4
57.6 60.2
62.0 66.6
62.6 L min
39.4 40.5
41.5 41.9
44.1 47.9
51.5 LI%
52.7 56.9
57.1 59.8
61.5 66.0
62.1 L2%
52.3 56.3
56.4 59.3
60.9 65.1
61.7 L5%
51.2 54.7
54.8 57.4
58.8 63.7
60.6 L8%
50.4 53.4
53.6 56.1
57.0 62.7
59.7 L25%
47.2 49.5
50.3 51.9
53.3 57.2
57.4 L50%
44.3 46.7
47.3 48.5
50.4 54.0
55.7 L90%
40.6 42.2
43.0 44.0
45.9 49.6
52.7 L95%
40.2 41.5
42.2 43.0
45.2 48.9
52.1 L99%
39.5 40.7
41.6 42.2
44.3 48.1
51.7 L eq
46.2 49.1
49.5 51.6
53.0 57.3
56.6 Adj.
10.0 10.0
10.0 10.0
10.0 10.0
10.0 Adj. L eQ
56.2 59.1
59.5 61.6
63.0 67.3
66.6 Day
7 8
9 10
11 12
13 14
15 16
17 18
54.5 52.6
54.1 51.1
51.4 51.1
50.0 52.4
51.0 52.9
53.6 54.4
59.5 58.1
60.6 56.3
58.1 56.1
55.9 61.8
57.9 59.6
61.7 61.8
50.1 48.2
49.7 47.5
46.6 45.7
44.6 44.7
44.9 46.7
47.1 47.8
59.2 57.8
60.3 55.9
57.6 55.8
55.4 61.4
57.5 59.1
61.0 61.1
58.9 57.6
60.0 55.5
57.0 55.5
55.0 60.8
57.1 58.5
60.5 60.4
58.1 56.5
58.0 54.6
55.9 54.8
54.0 58.7
56.0 57.0
58.8 59.0
57.6 55.8
57.0 53.8
55.0 54.1
53.5 57.1
55.2 56.3
57.3 58.1
55.3 53.5
54.7 51.7
52.0 52.3
51.0 51.8
51.7 54.0
53.9 55.3
53.6 51.4
53.0 50.2
49.9 50.4
48.8 49.2
49.1 51.6
51.9 53.0
51.1 49.2
50.8 48.3
47.7 46.6
45.6 45.9
46.0 48.1
48.6 49.3
50.6 48.8
50.4 47.9
47.2 46.2
45.2 45.3
45.6 47.5
47.9 48.6
50.2 48.4
49.8 47.6
46.8 45.8
44.8 44.8
45.1 46.8
47.3 47.9
54.5 52.6
54.1 51.1
51.4 51.1
50.0 52.4
51.0 52.9
53.6 54.4
0.0 0.0
0.0 0.0
0.0 0.0
0.0 0.0
0.0 0.0
0.0 0.0
54.5 52.6
54.1 51.1
51.4 51.1
50.0 52.4
51.0 52.9
53.6 54.4
Evening
19 20
21 53.6
53.8 53.5
60.9 62.9
61.0 46.5
46.3 45.9
60.4 62.2
60.6 59.7
61.6 60.1
58.3 60.1
59.1 57.4
57.9 58.1
54.5 53.9
53.9 51.8
50.9 51.2
48.2 47.5
47.7 47.5
46.9 47.0
46.7 46.4
46.1 53.6
53.8 53.5
5.0 5.0
5.0 58.6
58.8 58.5
Night
Timeframe
22 23
Hour
53.4 53.7
L ea
50.0 54.5
52.7 61.2
62.7 L max
44.7 44.5
L min
60.7 62.2
LI %
60.0 61.4
L2%
58.5 59.2
L5%
57.4 58.0
L8%
54.2 54.0
L25%
51.5 50.9
L50%
46.7 46.4
L90%
45.8 45.6
L95%
44.9 44.8
L99%
Day
Min
Max
Energy Average
55.9 44.6
61.8 50.1
Average:
55.4 61.4
58.5 55.0
60.8 58.1
54.0 59.0
56.8 53.5
58.1 55.9
51.0 55.3
53.1 48.8
53.6 51.0
45.6 51.1
48.1 45.2
50.6 47.6
44.8 50.2
47.1 Evening
Min
Max
Energy Average
53.5 53.8
53.6 60.9 45.9
62.9 46.5
Average:
60.4 62.2
61.1 59.7
61.6 60.5
58.3 60.1
59.2 57.4
58.1 57.8
53.9 54.5
54.1 50.9
51.8 51.3
47.5 48.2
47.8 46.9
47.5 47.1
46.1 46.7
46.4 Night
Min
Max
Energy Average
46.2 57.3
53.5 53.1
66.6 39.4
51.5 Average:
52.7 66.0
59.9 52.3
65.1 59.3
51.2 63.7
57.7 50.4
62.7 56.5
47.2 57.4
52.8 44.3
55.7 49.9
40.6 52.7
45.7 40.2
52.1 45.0
39.5 51.7
44.2 53.4
53.7 Daytime
(7am-7pm)
10.0 10.0
63.4 63.7
L ea (dBA)
Evening Nighttime
(7pm-lOpm) (10pm-7am)
52.7 53.6 53.5
24 -Hour
53.1 Z: \Shared\UciobsL15100-15500L15500\15548\04_Noise\Fieldwork\Measurements\15548 L3_EDEN 63 C!!1° CROSSROADS
URBAN
24 -Hour Noise Level Measurement Summary
Date: Wednesday, June 28, 2023
Project: Advanced Healthcare
Location:
L4 - Located west of the site
Source:
Meter: Piccolo II
JN: 15548
Analyst: Z. Ibrahim
Hourly L e, dBA Readings (unadjusted)
85.0 80.0
m 75.0
-o 70.0
65.0 60.0
T 55.0
50.0 o 45.0
= 40.0
35.0 in
I n
Iin
001
n
vi
I
O
4 ei
1D
n-
'1
IIIM
o
4 en
N
uS
o -
■ _.
EM
EM
M
- __-__1
0 1 2 3 4 5 6 7 8 9 10 11 12 13
Hour Beginning
14 15
16 17
18 19
20 21
22 23
Timeframe
Night
Hour
0 1
2 3
4 5
6 L eq
57.1 57.5
56.4 54.7
57.3 61.2
65.1 L max
67.8 69.4
67.6 65.3
66.8 70.1
74.0 L min
40.8 41.5
41.6 41.0
45.0 50.3
54.6 LI%
67.5 69.0
67.3 65.0
66.6 69.7
73.7 L2%
67.0 68.2
66.7 64.6
66.1 69.2
73.3 L5%
64.7 65.2
64.1 62.6
64.2 67.3
71.4 L8%
62.7 63.0
61.6 60.5
62.4 66.0
69.7 L25%
55.7 54.9
54.4 52.9
57.4 61.7
65.3 L50%
49.4 47.8
48.4 47.4
53.0 57.6
61.9 L90%
42.5 42.7
42.9 42.2
46.5 52.2
56.1 L95%
41.7 42.1
42.3 41.6
45.9 51.2
55.4 L99%
41.0 41.6
41.7 41.1
45.1 50.5
54.7 L eq
57.1 57.5
56.4 54.7
57.3 61.2
65.1 Adj.
10.0 10.0
10.0 10.0
10.0 10.0
10.0 Adj. L eQ
67.1 67.5
66.4 64.7
67.3 71.2
75.1 Day
7 8
9 10
11 12
13 14
15 16
17 18
65.0 64.9
67.5 65.3
65.8 64.9
65.2 68.7
66.1 66.7
65.6 65.1
73.9 73.7
79.1 75.0
75.2 73.3
73.9 80.4
74.5 75.6
73.7 74.6
53.7 53.1
54.5 52.6
52.6 51.4
52.3 53.2
53.3 52.7
51.9 51.7
49.9 49.1
47.3 73.6
73.4 78.7
74.5 74.8
73.1 73.6
79.9 74.2
75.2 73.4
74.4 73.1
72.8 77.6
73.5 74.3
72.6 73.0
79.2 73.6
74.5 72.8
73.8 71.2
70.9 73.7
71.3 72.1
71.0 71.3
75.8 71.8
72.3 71.0
71.6 69.7
69.7 71.1
69.8 70.2
69.8 69.8
72.3 70.4
70.8 70.1
69.7 65.4
65.5 66.7
66.2 66.4
65.9 66.4
67.3 67.2
68.0 66.9
65.5 61.6
61.7 63.2
61.5 62.2
61.4 61.8
64.1 63.4
63.9 63.0
61.1 55.6
55.2 56.4
54.8 54.8
53.8 54.5
56.1 56.0
55.3 55.0
54.2 54.6
54.2 55.5
53.6 53.6
52.6 53.3
54.5 54.6
53.9 53.6
53.0 53.9
53.3 54.7
52.8 52.7
51.6 52.4
53.4 53.5
53.0 52.3
51.9 50.1
49.4 47.5
65.0 64.9
67.5 65.3
65.8 64.9
65.2 68.7
66.1 66.7
65.6 65.1
0.0 0.0
0.0 0.0
0.0 0.0
0.0 0.0
0.0 0.0
0.0 0.0
65.0 64.9
67.5 65.3
65.8 64.9
65.2 68.7
66.1 66.7
65.6 65.1
Evening
19 20
21 64.6
64.4 64.5
75.1 75.4
76.9 74.8
75.0 76.4
73.9 74.1
75.5 71.3
71.5 71.9
69.4 69.3
69.5 64.6
63.6 61.8
58.7 57.9
55.8 52.1
51.6 49.4
51.1 50.5
48.4 64.6
64.4 64.5
5.0 5.0
5.0 69.6
69.4 69.5
Night
Timeframe
22 23
Hour
61.8 60.4
L ea
64.9 73.7
71.4 L max
45.7 45.2
L min
73.1 71.1
L1 %
72.1 70.4
L2%
69.6 68.1
L5%
67.2 66.0
L8%
59.9 58.9
L25%
54.5 53.2
L50%
47.3 47.2
L90%
46.6 46.3
L95%
45.8 45.4
L99%
Day
Min
Max
Energy Average
68.7 66.1
73.3 80.4
Average:
51.4 54.5
73.1 79.9
74.9 72.6
79.2 74.2
70.9 75.8
72.0 69.7
72.3 70.3
65.4 68.0
66.5 61.1
64.1 62.4
53.8 56.4
55.1 52.6
55.5 53.9
51.6 54.7
53.0 Evening
Min
Max
Energy Average
64.4 64.6
64.5 75.1 47.3
76.9 49.9
Average:
74.8 76.4
75.4 73.9
75.5 74.5
71.3 71.9
71.6 69.3
69.5 69.4
61.8 64.6
63.3 55.8
58.7 57.5
49.4 52.1
51.0 48.4
51.1 50.0
47.5 50.1
49.0 61.8
60.4 Daytime
(7am-7pm)
10.0 10.0
71.8 70.4
L ea (dBA)
Evening Nighttime
(7pm-10pm) (10pm-7am)
66.1 64.5 60.2
24 -Hour
Night Min
Max
Energy Average
54.7 65.1
60.2 65.3
74.0 Average:
40.8 54.6
65.0 73.7
69.2 64.6
73.3 68.6
62.6 71.4
66.4 60.5
69.7 64.3
52.9 65.3
57.9 47.4
61.9 52.6
42.2 56.1
46.6 41.6
55.4 45.9
41.0 54.7
45.2 64.4
Z: \Shared\UciobsL15100-15500L15500\15548\04_Noise\Fieldwork\Measurements\15548 L4_FDEN 64 C!!1° CROSSROADS
URBAN
AHC-Skilled Nursing Facility Noise and Vibration Analysis APPENDIX 7.1:
CADNAA OPERATIONAL NOISE CALCULATIONS
15548-02 Noise Study
65 0 URBAN
11-626
AHC-Skilled Nursing Facility Noise and Vibration Analysis This page intentionally left blank
15548-02 Noise Study
66 ` o URBAN
11-627
15548 - AHC Skilled Nursing Facility
CadnaA Noise Prediction Model: 15548-02.cna
Date: 03.08.23
Analyst: B. Lawson
Calculation Configuration
Configuration
Parameter
Value
General
Max. Error (dB)
0.00 Max. Search Radius (#(Unit,LEN))
2000.01
Min. Dist Src to Rcvr
0.00 Partition
Raster Factor
0.50 Max. Length of Section (it(Unit,LEN))
999.99
Min. Length of Section (#(Unit,LEN))
1.01 Min. Length of Section (%)
0.00 Proj. Line Sources
On
Proj. Area Sources
On
Ref. Time
Daytime Penalty (dB)
0.00 Recr. Time Penalty (dB)
5.00 Night-time Penalty (dB)
10.00 DTM
Standard Height (m)
0.00 Model of Terrain
Triangulation
Reflection
max. Order of Reflection
2 Search Radius Src
100.00
Search Radius Rcvr
100.00
Max. Distance Source - Rcvr
1000.001000.00
Min. Distance Rvcr- Reflector
1.00 1.00
Min. Distance Source - Reflector
0.10 Industrial (ISO 9613)
Lateral Diffraction
some Obj
Obst. within Area Src do not shield
On
Screening
Incl. Ground Att. over Barrier
Dz with limit (20/25)
Barrier Coefficients C1,2,3
3.0 20.0 0.0
Temperature (8(Unit,TEMP))
10 rel. Humidity (%)
70 Ground Absorption G
0.50 Wind Speed for Dir. (P(Unit,SPEED))
3.0 Roads (TNM)
Railways (FTA/FRA)
Aircraft (277)
Strictly acc. to AzB
Receiver Noise Levels
Name
M.
ID
Level
Lr
Limit. Value.
Land Use
Height
Coordinates
Day
Eve
Night
CNEL
Day
Eve
Night
CNEL
Type
Auto
Noise Type
X
Y
Z
(dBA)
(dBA)
(dBA)
(dBA)
(dBA)
(dBA)
(dBA)
(dBA)
(ft)
(ft)
(ft)
(ft)
91 91
46.5 44.5
41.9 49.6
65.0 60.0
55.0 0.0
5.00 a 6514499.41
2230857.05
5.00 R2
R2
44.3 39.9
37.4 45.8
55.0 50.0
45.0 0.0
5.00 a 6514811.74
2230794.15
5.00 R3
R3
38.2 37.7
35.7 42.9
55.0 50.0
45.0 0.0
5.00 a 6514073.02
2230502.05
5.00 R4
R4
52.5 46.0
43.7 52.8
55.0 50.0
45.0 0.0
5.00 a 6514756.81
2230400.36
5.00 Point Source(s)
Name
M.
ID
Result. PWL
Lw/Li
Operating Time
Height
Coordinates
Day
Evening
Night
Type
Value
norm.
Day
Special
Night
X
Y
Z
(dBA)
(dBA)
(dBA)
dB(A)
(min)
(min)
(min)
(ft)
(ft)
(ft)
(ft)
POINTSOURCE
AC01
88.9 88.9
88.9 Lw
88.9 468.00
117.00
252.00
3.00 g 6514456.04
2230333.18
23.00 POINTSOURCE
ACO2
88.9 88.9
88.9 Lw
88.9 468.00
117.00
252.00
3.00 g 6514632.61
2230333.70
23.00 POINTSOURCE
AC03
88.9 88.9
88.9 Lw
88.9 468.00
117.00
252.00
3.00 g 6514606.25
2230481.38
23.00 POINTSOURCE
AC04
88.9 88.9
88.9 Lw
88.9 468.00
117.00
252.00
3.00 g 6514440.94
2230464.95
23.00 POINTSOURCE
AC05
88.9 88.9
88.9 Lw
88.9 468.00
117,00
252.00
3.00 g 6514545.63
2230622.24
23.00 POINTSOURCE
CARO1
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514390.94
2230354.53
5.00 POINTSOURCE
CAR02
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514391.98
2230398.80
5.00 POINTSOURCE
CAR03
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514392.50
2230442.55
5.00 POINTSOURCE
CAR04
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514393.02
2230486.83
5.00 POINTSOURCE
CAR05
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514394.07
2230588.91
5.00 POINTSOURCE
CAR06
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514395.11
2230624.33
5.00 POINTSOURCE
CAR07
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514481.04
2230622.76
5.00 POINTSOURCE
CAR08
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514481.57
2230591.51
5.00 POINTSOURCE
CAR09
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514418.02
2230540.47
5.00 POINTSOURCE
CAR10
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514538.34
2230226.93
5.00 POINTSOURCE
CAR11
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514538.86
2230199.33
5.00 Urban Crossroads, Inc.
67 11-628
Name
M.
ID
Result. PWL
Lw/Li
Operating Time
Height
Coordinates
Day
Evening
Night
Type
Value
norm.
Day
Special
Night
X
Y
Z
(dBA)
(dBA)
(dBA)
dB(A)
(min)
(min)
(min)
(ft)
(ft)
(ft)
(ft)
POINTSOURCE
CAR12
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514562.29
2230171.20
5.00 POINTSOURCE
CAR13
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514600.32
2230170.16
5.00 POINTSOURCE
CAR14
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514620.11
2230209.74
5.00 POINTSOURCE
CAR15
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514643.54
2230170.68
5.00 POINTSOURCE
CAR16
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514667.50
2230209.22
5.00 POINTSOURCE
CAR17
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514688.86
2230435.26
5.00 POINTSOURCE
CAR18
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514689.90
2230468.08
5.00 POINTSOURCE
CAR19
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514626.36
2230557.66
5.00 POINTSOURCE
CAR20
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514624.27
2230590.47
5.00 POINTSOURCE
CAR21
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514622.19
2230631.10
5.00 POINTSOURCE
CAR22
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514655.00
2230580.05
5.00 POINTSOURCE
CAR23
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514652.92
2230618.08
5.00 POINTSOURCE
CAR24
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514689.90
2230597.76
5.00 POINTSOURCE
CAR25
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514689.90
2230634.74
5.00 POINTSOURCE
CAR26
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514679.48
2230685.26
5.00 POINTSOURCE
CAR27
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514634.69
2230685.78
5.00 POINTSOURCE
CAR28
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514594.07
2230685.78
5.00 POINTSOURCE
CAR29
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514399.79
2230680.58
5.00 POINTSOURCE
CAR30
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514436.77
2230681.62
5.00 POINTSOURCE
CAR31
81.1 81.1
81.1 Lw
81.1 720.00
180.00
270.00
5.00 a 6514471.67
2230681.62
5.00 POINTSOURCE
GENO1
110.3
110.3
110.3
Lw
110.3
120.00
0.00 0.00
5.00 a 6514674.41
2230515.29
5.00 POINTSOURCE
TRASHo1
89.0 89.0
89.0 Lw
89 720.00
180.00
270.00
5.00 a 6514690.42
2230520.68
5.00 POINTSOURCE
TRASHO2
89.0 89.0
89.0 Lw
89 720.00
180.00
270.00
5.00 a 6514689.90
2230511.30
5.00 Line Source(s)
Name M. ID Result. PWL
Result. PWL'
Lw / Li
Operating Time
Moving Pt. Src
Height
Day
(dBA) (dBA) (dBA) ( (dBA)
Evening Night
Day Evening
dBA) (dBA)
Night
Type Value I norm. Day Special Night Number Speed
dB(A) (min) (min) (min) Day IEvening Night (mph) (ft)
Name
ID
Height
Begin
(ft)
Coordinates
Area Source(s)
Name M. ID Result. PWL
End
(ft)
x
y Ground
(ft) (ft) (ft) )ft)
Result. PWL"
Lw / Li
Operating Time
Height
Day
(dBA) (dBA) (dBA) (dBA) (dBA) (dBA)
Evening
Night
Day
Evening
Night
Type ( Valued norm.
Day
Special
Night
(ft)
dB(A) (min) (min) (min)
Name ID
Height
Begin
(ft)
Coordinates
Barrier(s)
Name
Sel.
M.
ID Absorption
Z-Ext.
Cantilever
Height
Coordinates
left
right
horz.
vert.
Begin
End
x
y
z
Ground
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
BARRIEREXISTING
0 6.00
a
6515168.72
2230706.29
6.00 0.00
6514788.34
2230700.89
6.00 0.00
6514737.29
2230650.89
6.00 0.00
6514737.82
2230147.24
6.00 0.00
6514759.37
2230152.81
6.00 0.00
6514781.42
2230155.93
6.00 0.00
6514803.68
2230156.57
6.00 0.00
6514825.87
2230154.70
6.00 0.00
6514847.71
2230150.37
6.00 0.00
BARRIEREXISTING
0 6.00
a
6515172.92
2230777.65
6.00 0.00
6514801.36
2230775.37
6.00 0.00
6514774.27
2230801.41
6.00 0.00
6514776.36
2231105.58
6.00 0.00
6514775.84
2231325.89
6.00 0.00
BARRIEREXISTING
0 6.00
a
6514213.05
2231572.41
6.00 0.00
6514207.45
2230182.98
6.00 0.00
6514169.67
2230135.41
6.00 0.00
6513307.75
2230136.81
6.00 0.00
BARRIEREXISTING
0 5.00
a
6514537.83
2230629.22
5.00 0.00
6514557.15
2230629.64
5.00 0.00
6514556.11
2230508.70
5.00 0.00
6514614.92
2230504.75
5.00 0.00
6514613.47
2230461.32
5.00 0.00
6514586.87
2230435.55
5.00 0.00
6514639.86
2230331.86
5.00 0.00
6514626.97
2230323.34
5.00 0.00
6514568.58
2230424.74
5.00 0.00
6514527.64
2230424.54
5.00 0.00
End
(ft)
y Ground
(ft) (ft) )ft) (ft)
Urban Crossroads, Inc.
68 11-629
Name
Sel.
M.
ID Absorption
Z-Ext.
Cantilever
Height
Coordinates
left
right
horz.
vert.
Begin
End
x
y
z
Ground
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
6514458.65
2230322.09
5.00 0.00
6514444.52
2230330.40
5.00 0.00
6514514.55
2230450.30
5.00 0.00
6514428.73
2230458.20
5.00 0.00
6514430.39
2230471.29
5.00 0.00
6514528.89
2230466.30
5.00 0.00
6514537.41
2230526.36
5.00 0.00
6514537.83
2230629.64
5.00 0.00
BARRIERPLANNED
0 6.00
a
6514693.55
2230523.90
6.00 0.00
6514660.93
2230524.03
6.00 0.00
6514660.93
2230503.00
6.00 0.00
6514687.56
2230503.00
6.00 0.00
BARRIERPLANNED
0 6.00
a
6514685.16
2230508.19
6.00 0.00
6514694.08
2230508.46
6.00 0.00
6514693.55
2230523.90
6.00 0.00
Building(s)
Name
Sel.
M.
ID
RB
Residents
Absorption
Height
Coordinates
Begin
x
y
z
Ground
(ft)
(ft)
(ft)
(ft)
(ft)
BUILDING
BUILDING00001
x
0 20.00
a 6514514.38
2230636.83
20.00 0.00
6514575.32
2230637.87
20.00 0.00
6514577.40
2230515.99
20.00 0.00
6514626.36
2230513.91
20.00 0.00
6514624.27
2230448.80
20.00 0.00
6514618.54
2230448.28
20.00 0.00
6514618.02
2230425.37
20.00 0.00
6514666.98
2230336.83
20.00 0.00
6514613.34
2230304.53
20.00 0.00
6514550.32
2230416.51
20.00 0.00
6514540.42
2230417.55
20.00 0.00
6514476.88
2230304.53
20.00 0.00
6514423.75
2230336.83
20.00 0.00
6514476.36
2230427.45
20.00 0.00
6514421.67
2230427.45
20.00 0.00
6514421.67
2230508.18
20.00 0.00
6514503.44
2230508.70
20.00 0.00
6514514.90
2230520.16
20.00 0.00
Urban Crossroads, Inc.
69 11-630
AHC-Skilled Nursing Facility Noise and Vibration Analysis This page intentionally left blank
15548-02 Noise Study
70 O URBAN
11-631
AHC-Skilled Nursing Facility Noise and Vibration Analysis APPENDIX 8.1:
CADNAA CONSTRUCTION NOISE CALCULATIONS
15548-02 Noise Study
71 ` o URBAN
11-632
AHC-Skilled Nursing Facility Noise and Vibration Analysis This page intentionally left blank
15548-02 Noise Study
72 ` o URBAN
11-633
15548 - AHC Skilled Nursing Facility
CadnaA Noise Prediction Model: 15548-02_Construction.cna Date: 01.08.23
Analyst: B. Lawson
Calculation Configuration
Configuration
Parameter
Value
General
Max. Error (dB)
0.00 Max. Search Radius (#(Unit,LEN))
2000.01
Min. Dist Src to Rcvr
0.00 Partition
Raster Factor
0.50 Max. Length of Section (it(Unit,LEN))
999.99
Min. Length of Section (#(Unit,LEN))
1.01 Min. Length of Section (%)
0.00 Proj. Line Sources
On
Proj. Area Sources
On
Ref. Time
Daytime Penalty (dB)
0.00 Recr. Time Penalty (dB)
5.00 Night-time Penalty (dB)
10.00 DTM
Standard Height (m)
0.00 Model of Terrain
Triangulation
Reflection
max. Order of Reflection
2 Search Radius Src
100.00
Search Radius Rcvr
100.00
Max. Distance Source - Rcvr
1000.001000.00
Min. Distance Rvcr- Reflector
1.00 1.00
Min. Distance Source - Reflector
0.10 Industrial (ISO 9613)
Lateral Diffraction
some Obj
Obst. within Area Src do not shield
On
Screening
Incl. Ground Att. over Barrier
Dz with limit (20/25)
Barrier Coefficients C1,2,3
3.0 20.0 0.0
Temperature (#(Unit,TEMP))
10 rel. Humidity (%)
70 Ground Absorption G
0.50 Wind Speed for Dir. (#(Unit,SPEED))
3.0 Roads (TNM)
Railways (FTA/FRA)
Aircraft (277)
Strictly acc. to AzB
Receiver Noise Levels
Name
M.
ID
Level Lr
Limit. Value
Land Use
Height
Coordinates
Day
Eve
Night
CNEL
Day
Eve
Night
CNEL
Type
Auto
Noise Type
X
Y
Z
(dBA)
(dBA)
(dBA)
(dBA)
(dBA)
(dBA)
(dBA)
(dBA)
(ft)
(ft)
(ft)
(ft)
R1
91 62.9
62.9 62.9
69.5 65.0
60.0 55.0
0.0 5.00
a 6514499.41
2230857.05
5.00 R2
R2
57.1 57.1
57.1 63.8
55.0 50.0
45.0 0.0
5.00 a 6514811.74
2230794.15
5.00 R3
R3
55.7 55.7
55.7 62.4
55.0 50.0
45.0 0,0
5.00 a 6514073.02
2230502.05
5.00 R4
R4
64.5 64.5
64.5 71.1
55.0 50.0
45.0 0.0
5.00 a 6514756.81
2230400.36
5.00 Point Source(s)
Name
M.
ID
Result. PWL
Lw / Li
Value
Operating Time
Height
Coordinates
Day
Evening) Night
Type
norm.
dB(A) (min) ) (min) ) (min) (ft)
Day ) Special ) Night
X
9 I z
(dBA) (dBA) ) (dBA)
Barrier(s)
Name
Sel.
M.
ID Absorption
Z-Ext.
Cantilever
Height
Coordinates
left
right
horz.
vert.
Begin
End
x
y
z
Ground
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
BARRIEREXISTING
0 6.00
a
6515168.72
2230706.29
6.00 0.00
6514788.34
2230700.89
6.00 0.00
6514737.29
2230650.89
6.00 0.00
6514737.82
2230147.24
6.00 0.00
6514759.37
2230152.81
6.00 0.00
6514781.42
2230155.93
6.00 0.00
6514803.68
2230156.57
6.00 0.00
6514825.87
2230154.70
6.00 0.00
6514847.71
2230150.37
6.00 0.00
BARRIEREXISTING
0 6.00
a
6515172.92
2230777.65 6.00
0.00 (ft) ) (ft) ) (ft)
Urban Crossroads, Inc.
73 11-634
Name
Sel.
M.
ID Absorption
Z-Ext.
Cantilever
Height
Coordinates
left
right
horz.
vert.
Begin
End
x
y
z
Ground
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
6514801.36
2230775.37
6.00 0.00
6514774.27
2230801.41
6.00 0.00
6514776.36
2231105.58
6.00 0.00
6514775.84
2231325.89
6.00 0.00
BARRIEREXISTING
0 6.00
a
6514213.05
2231572.41
6.00 0.00
6514207.45
2230182.98
6.00 0.00
6514169.67
2230135.41
6.00 0.00
6513307.75
2230136.81
6.00 0.00
Building(s)
Name
5e1.
M.
ID
RB
Residents
Absorption
Height
Coordinates
Begin
(ft) (ft) (ft)
y
z Ground
Urban Crossroads, Inc.
74 11-635
Michael Baker
INTERNATIONAL
We Make a Difference
SKILLED NURSING FACILITY
PRELIMINARY HYDROLOGY STUDY
CITY OF RANCHO MIRAGE
Prepared for:
Advanced Health Care
310 W. Park Lane
Farmington, UT 84025
Telephone: TBD
Report Prepared By:
Michael Baker International
75-410 Gerald Ford Drive, Suite 100
Palm Desert, CA 92211
Telephone: (760) 346-7481
Fax: (760) 346-8315
MBI JN: 194821
Date: October 2023
Revision History
Date
Comment
Engineer of Work/ Contact Person:
Todd Pitner, P.E.
Danielle Peltier, E.I.T.
11-636
SECTION 1 — INTRODUCTION
1.1 BACKGROUND
Michael Baker International has been retained by Advanced Health Care to prepare a hydrology study for a Skilled Nursing Facility located on the northeast corner of Gerald Ford Drive and Bob Hope Drive in Rancho Mirage, CA 92270 to show how storm water runoff from the 100 - year storm event shall be retained on -site to ensure proper stormwater handling and safety to the public. Figure 1 below shows the general vicinity of the project location. \\ Thousand
\ Palms
RAMON RD
0 DINAH SHORE
Cathedral a
City
0 1
GERALD FORD
o
FRANK
Roncho Mirage
COUNTRY
INATRA
—1 CLUB
R
Palm
4 o �
FRED
DR
Desert
WARING
OR 00
DR
4o 'O
N 42ND AVE
o� 0 Bermudo
Dunes
Ft 1_
z
VICINITY MAP
NO SCALE
Figure 1. Vicinity Map
HWY
111
FAIRWAY -
MILES
vE
40TH
AVE
1r`
The 5.4 -acre site is a vacant plot that does not receive runoff from neighboring land developments. The property currently lies within a FEMA mapped flood plain Zone X, Areas determined to be outside the 0.2% annual chance floodplain. The National Flood Hazard FRIMette can be found in Appendix F. Runoff will be collected in storm drain facilities and drain to both above ground infiltration basins and an underground storage chamber proposed onsite under the parking lot.
1.2 OBJECTIVE
The objective of this drainage study is to determine the 100 -year onsite discharges in accordance with the criteria and procedures described in the Riverside County Flood Control & Water Conservation District (RCFCD&WCD) Hydrology Manual. The included calculations have been prepared to show the required storage volume for on -site retention. The drainage study will also demonstrate that the proposed storm drain system is sized to mitigate peak flows and minimize runoff due to the proposed land developments.
SECTION 2 — PROJECT DESCRIPTION
2.1 EXISTING CONDITIONS
The project site is a vacant lot with poor land cover, as seen in Figure 2 below. The property www.mbakerintl.com 75-410 Gerald Ford Drive., Suite 100 Palm Desert, CA 92211 Office: 760-346-7481
11-637
is 5.4 acres with a public, meandering sidewalk on the south and west perimeters, which is the only existing impervious surface on the property. Runoff generally flows in the southerly direction until meeting Gerald Ford Drive. There is no stormwater run-on from neighboring properties.
Figure 2. Project Site
2.2 PROPOSED CONDITIONS
The proposed development will include one building, concrete flatwork, paved parking areas, landscape areas, and various associated site improvements. Stormwater runoff will behave similar to the existing flow patterns by generally draining in the southerly direction.
Runoff from the parking lot will sheet flow to gutters and drain into grate inlets located at low points throughout the parking lot. Roof runoff will be collected in roof drains and conveyed to the proposed storm drain network and will be detailed in Final. Although the parcels are 5.4 acres, the total area of all drainage management areas that will have their runoff retained on -site are 4.41 acres. Approximately 0.09 acres of hardscape from the driveway will be draining away from the site, and the rest of the areas are landscaped/self treating areas. All drainage area runoff will be discharged into either above ground infiltration basins or a proposed underground basin system. The stored volume will be infiltrated into the subsoils within 72 hours to avoid any vector issues and will be confirmed with a calculation following the results of an on -site percolation test. Flows exceeding the design storm volume will be conveyed via surface overflow to Gerald Ford Drive. Refer to Appendix B for the Proposed Condition Hydrology Map.
As of June 15, 2009, developers must comply with the Colorado River Basin Regional Water Quality Control Board (CRBRWQCB) requiring the preparation, approval, and implementation of a project -specific WQMP for discretionary New Developments and Redevelopment projects that fall into (1) of the (8) Priority Development Project categories. This project falls into categories 3 and 8:
www.mbakerintl.com 75-410 Gerald Ford Drive., Suite 1001 Palm Desert, CA 92211 Office: 760-346-7481
11-638
3. Commercial and industrial developments of 100,000 square feet or more;
8. Parking lots of 5,000 square feet of more with 25 or more parking spaces and potentially exposed to Urban Runoff.
SECTION 3 — HYDROLOGY
3.1 APPROACH AND METHODOLOGY
The hydrologic analysis described in this report was performed in accordance with the criteria and procedures outlined in the Riverside County Flood Control and Water Conservation District Hydrology Manual dated April 1978, referred to hereafter as "Hydrology Manual".
Hydrologic calculations to evaluate surface runoff associated with the 100 -year storm event were performed using data from the Web Soil Survey and NOAA Atlas Point Precipitation Frequency Estimates to find soil classification and rainfall intensity values. The Web Soil Survey report in Appendix D shows that the site entirely lies within hydrologic soil type "A".
Precipitation data used in this study was taken from the NOAA Atlas 14 website at the project site and is included in Appendix E. The developed site will be considered "commercial" land use type with varying impervious cover. A summary of the proposed land -use is shown below in Table 1.
Table 1 — Proposed Land -use Summary
DMA ID
DMA Area (sf) _
Pervious (sf)
% Pervious
% Impervious
Al
31426.41
5520.48
17.57 82.43
A2
12578.47
5553.72
44.15 55.85
B1
26576.93
3222.4
12.12 87.88
B2
21054.64
7749.67
36.81 63.19
C1
76099.21
12855.85
16.89 83.11
D1
24299.8
5102.5
21.00 79.00
Watershed losses generally consist of infiltration, depression storage, vegetation, and minor amounts of evaporation. Loss rates vary with each land use and soil type. The procedures and criteria used in this study for estimating loss rates follow the guidelines of the Hydrology Manual.
The Antecedent Moisture Condition (AMC) indicates the soil wetness prior to a particular storm and the runoff potential for the subject storm. An AMC is defined as:
AMC I: Lowest runoff potential
AMC I I : Moderate runoff potential
AMC I I I : Highest runoff potential
AMC II was applied for the 100 -year storm event as outlined in the Hydrology Manual.
3.2 RATIONAL METHOD HYDROLOGY RESULTS
The peak 100 -year discharges are calculated using the rational method, as prescribed by the RCFC&WCD Hydrology Manual. Detailed catch basin inlet and storm drain size www.mbakerintl.com 75-410 Gerald Ford Drive., 5uite1001 Palm Desert, CA 92211 office: 760-346-7481
11-639
calculations (hydraulics) will be provided in the Final Report along with a discussion of Manning's N values. For the Preliminary report, rational method calculations are located in Appendix A.
3.3 STORAGE VOLUMES
The project is required to retain 100% of the worst -case duration of the 100 -year storm event onsite per the City of Rancho Mirage Municipal Code — Title 13 Section 13.05.010 for all projects greater than one acre in size and located north of the Whitewater River. A spreadsheet based on the Shortcut Method Synthetic Unit Hydrograph approach as prescribed by the Hydrology Manual has been utilized to perform the calculations. Rainfall input data for the 100 -year, 1 -hour, 3 -hour, 6 -hour, and 24 -hour storms is input per said NOAA 14 Atlas. Basin Inflow is modeled in 5 -minute intervals for the 1 -hour, 3 -hour and 6 - hour storms, and 15 -minute intervals for the 24 -hour storm, based on the design storm unit hydrographs presented in the Hydrology Manual.
The 100-yr, 6 -hour storm is shown to be the design storm from the results and a summary of the basin sizing can be seen in Table 2 below. The proposed underground retention chamber system has a capacity of approximately 3,725.06 cubic feet. ADS StormTech drawings are included in Appendix G that show the preliminary layout, sections, and details of the underground system; further specifications such as invert evaluations will be provided in the Final Drainage Study. The design infiltration rate of the soils at the basin is 1.0 in/hr per the maximum percolation rate set by the City of Rancho Mirage design standards in City Standard 310.
Table 2 — Unit Hydrograph Summary
Basin
Drainage Area (ac)
Basin Storage
Provided (cf)
Basin Storage
Storm Volume (cf)
Depth Full/
Max Depth
A
1.01 6,543.14
5,898.65
3.61/4
B
1.09 7,439.91
6,611.18
3.55/4
C
1.75 13,071.17
12,552.77
4.80/5
D
0.56 3,725.06
3,509.92
5.19/5.5
The proposed basins are in line with the design criteria set by the City having no steeper than 2:1 slopes, and one foot minimum of freeboard below the lowest building pad to the maximum water level. The maximum water surface elevation comes from Basin C, at 10.8, while the building pad is at 11.93.
CONCLUSION
The methodologies used in this study are in compliance with the City of Rancho Mirage and RCFC&WCD Criteria. The project site lies within FEMA designated Zone X, Areas determined to be outside the 0.2% annual chance floodplain. The above ground infiltration basins and underground storage chamber will retain the volume of 100% of the worst case 100 -year storm volume. Based on these design calculations, the proposed drainage system will capture sufficient onsite runoff to keep the proposed site from significant flooding during the 100 -year storm event. There are no anticipated negative upstream or downstream impacts.
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75-410 Gerald Ford Drive., Suite 1001 Palm Desert, CA 92211 Office: 760-346-7481
11-640
APPENDIX A
RATIONAL METHOD
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75-410 Gerald Ford Drive., Suite 1001 Palm Desert, CA 92211 Office: 760-346-7481
11-641
Riverside County Rational Hydrology Program
CIVILCADD/CIVILDESIGN Engineering Software,(c) 1989 - 2018 Version 9.0 Rational Hydrology Study Date: 10/02/23 File:SNFA.out
SKILLED NURSING FACILITY
DMA A
PROPOSED CONDITION 100 -YEAR STORM
BY DP ON 10/2/23
*********
Hydrology Study Control Information **********
English (in -lb) Units used in input data file
Program License Serial Number 6482
Rational Method Hydrology Program based on
Riverside County Flood Control & Water Conservation District 1978 hydrology manual
Storm event (year) = 100.00 Antecedent Moisture Condition = 2 Standard intensity -duration curves data (Plate D-4.1)
For the [ Cathedral City ] area used.
10 year storm 10 minute intensity = 2.770(In/Hr)
10 year storm 60 minute intensity = 0.980(In/Hr)
100 year storm 10 minute intensity = 4.520(In/Hr)
100 year storm 60 minute intensity = 1.600(In/Hr)
Storm event year = 100.0
Calculated rainfall intensity data:
1 hour intensity = 1.600(In/Hr)
Slope of intensity duration curve = 0.5800
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 10.000 to Point/Station 20.000 **** INITIAL AREA EVALUATION ****
Initial area flow distance = 247.600(Ft.)
Top (of initial area) elevation = 12.310(Ft.)
Bottom (of initial area) elevation = 11.190(Ft.)
Difference in elevation = 1.120(Ft.)
Slope = 0.00452 s(percent)= 0.45
TC = k(0.300)*[(length^3)/(elevation change)]^0.2
Initial area time of concentration = 8.008 min.
Rainfall intensity = 5.145(In/Hr) for a 100.0 year storm COMMERCIAL subarea type
Runoff Coefficient = 0.868
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
11-642
Decimal fraction soil group D = 0.000
RI index for soil(AMC 2) = 32.00
Pervious area fraction = 0.100; Impervious fraction = 0.900 Initial subarea runoff = 3.216(CFS)
Total initial stream area = 0.720(Ac.)
Pervious area fraction = 0.100
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 20.000 to Point/Station 40.000 **** CONFLUENCE OF MINOR STREAMS ****
Along Main Stream number: 1 in normal stream number 1
Stream flow area = 0.720(Ac.)
Runoff from this stream = 3.216(CFS)
Time of concentration = 8.01 min.
Rainfall intensity = 5.145(In/Hr)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 30.000 to Point/Station 40.000 **** INITIAL AREA EVALUATION ****
Initial area flow distance = 110.900(Ft.)
Top (of initial area) elevation = 12.300(Ft.)
Bottom (of initial area) elevation = 11.220(Ft.)
Difference in elevation = 1.080(Ft.)
Slope = 0.00974 s(percent)= 0.97
TC = k(0.300)*[(length^3)/(elevation change)]^0.2
Warning: TC computed to be less than 5 min.; program is assuming the time of concentration is 5 minutes.
Initial area time of concentration = 5.000 min.
Rainfall intensity = 6.762(In/Hr) for a 100.0 year storm COMMERCIAL subarea type
Runoff Coefficient = 0.873
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
RI index for soil(AMC 2) = 32.00
Pervious area fraction = 0.100; Impervious fraction = 0.900 Initial subarea runoff =
Total initial stream area =
Pervious area fraction = 0.100
1.713(CFS)
0.290(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 40.000 to Point/Station 40.000 **** CONFLUENCE OF MINOR STREAMS ****
Along Main Stream number: 1 in normal stream number 2
Stream flow area = 0.290(Ac.)
Runoff from this stream = 1.713(CFS)
Time of concentration = 5.00 min.
Rainfall intensity = 6.762(In/Hr)
Summary of stream data:
Stream Flow rate TC
No. (CFS) (min)
Rainfall Intensity
(In/Hr)
11-643
1 3.216 8.01 5.145
2 1.713 5.00 6.762
Largest stream flow has longer time of concentration
Qp =
Qp =
3.216 + sum of
Qb Ia/Ib
1.713 * 0.761 =
4.519
1.303
Total of 2 streams to confluence:
Flow rates before confluence point:
3.216 1.713
Area of streams before confluence:
0.720 0.290
Results of confluence:
Total flow rate = 4.519(CFS)
Time of concentration = 8.008 min.
Effective stream area after confluence = 1.010(Ac.)
End of computations, total study area = 1.01 (Ac.)
The following figures may
be used for a unit hydrograph study of the same area.
Area averaged pervious area fraction(Ap) = 0.100
Area averaged RI index number = 32.0
11-644
Riverside County Rational Hydrology Program
CIVILCADD/CIVILDESIGN Engineering Software,(c) 1989 - 2018 Version 9.0 Rational Hydrology Study Date: 10/02/23 File:SNFB.out
SKILLED NURSING FACILITY
DMA B
PROPOSED CONDITION 100 -YEAR STORM
BY DP ON 10/2/23
*********
Hydrology Study Control Information **********
English (in -lb) Units used in input data file
Program License Serial Number 6482
Rational Method Hydrology Program based on
Riverside County Flood Control & Water Conservation District 1978 hydrology manual
Storm event (year) = 100.00 Antecedent Moisture Condition = 2 Standard intensity -duration curves data (Plate D-4.1)
For the [ Cathedral City ] area used.
10 year storm 10 minute intensity = 2.770(In/Hr)
10 year storm 60 minute intensity = 0.980(In/Hr)
100 year storm 10 minute intensity = 4.520(In/Hr)
100 year storm 60 minute intensity = 1.600(In/Hr)
Storm event year = 100.0
Calculated rainfall intensity data:
1 hour intensity = 1.600(In/Hr)
Slope of intensity duration curve = 0.5800
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 10.000 to Point/Station 50.000 **** INITIAL AREA EVALUATION ****
Initial area flow distance = 121.900(Ft.)
Top (of initial area) elevation = 12.310(Ft.)
Bottom (of initial area) elevation = 10.780(Ft.)
Difference in elevation = 1.530(Ft.)
Slope = 0.01255 s(percent)= 1.26
TC = k(0.300)*[(length^3)/(elevation change)]^0.2
Warning: TC computed to be less than 5 min.; program is assuming the time of concentration is 5 minutes.
Initial area time of concentration = 5.000 min.
Rainfall intensity = 6.762(In/Hr) for a 100.0 year storm COMMERCIAL subarea type
Runoff Coefficient = 0.873
Decimal fraction soil group A = 1.000
11-645
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
RI index for soil(AMC 2) = 32.00
Pervious area fraction = 0.100; Impervious fraction 0.900 Initial subarea runoff =
Total initial stream area =
Pervious area fraction = 0.100
3.602(CFS)
0.610(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 50.000 to Point/Station 70.000 **** CONFLUENCE OF MINOR STREAMS ****
Along Main Stream number: 1 in normal stream number 1
Stream flow area = 0.610(Ac.)
Runoff from this stream = 3.602(CFS)
Time of concentration = 5.00 min.
Rainfall intensity = 6.762(In/Hr)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 60.000 to Point/Station 70.000 **** INITIAL AREA EVALUATION ****
Initial area flow distance = 196.000(Ft.)
Top (of initial area) elevation = 12.920(Ft.)
Bottom (of initial area) elevation = 11.060(Ft.)
Difference in elevation = 1.860(Ft.)
Slope = 0.00949 s(percent)= 0.95
TC = k(0.300)*[(length^3)/(elevation change)]^0.2
Initial area time of concentration = 6.289 min.
Rainfall intensity = 5.919(In/Hr) for a 100.0 year storm COMMERCIAL subarea type
Runoff Coefficient = 0.871
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.000
RI index for soil(AMC 2) = 32.00
Pervious area fraction = 0.100; Impervious fraction = 0.900 Initial subarea runoff =
Total initial stream area =
Pervious area fraction = 0.100
2.474(CFS)
0.480(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 70.000 to Point/Station
**** CONFLUENCE OF MINOR STREAMS ****
70.000
Along Main Stream number: 1 in normal stream number 2
Stream flow area = 0.480(Ac.)
Runoff from this stream = 2.474(CFS)
Time of concentration = 6.29 min.
Rainfall intensity = 5.919(In/Hr)
Summary of stream data:
Stream Flow rate TC
No. (CFS) (min)
Rainfall Intensity
(In/Hr)
11-646
1 3.602 5.00 6.762
2 2.474 6.29 5.919
Largest stream flow has longer or shorter time of concentration Qp =
Qp =
3.602 + sum of
Qa Tb/Ta
2.474 * 0.795 =
5.570
1.967
Total of 2 streams to confluence:
Flow rates before confluence point:
3.602 2.474
Area of streams before confluence:
0.610 0.480
Results of confluence:
Total flow rate = 5.570(CFS)
Time of concentration = 5.000 min.
Effective stream area after confluence = 1.090(Ac.)
End of computations, total study area = 1.09 (Ac.)
The following figures may
be used for a unit hydrograph study of the same area.
Area averaged pervious area fraction(Ap) = 0.100
Area averaged RI index number = 32.0
11-647
Riverside County Rational Hydrology Program
CIVILCADD/CIVILDESIGN Engineering Software,(c) 1989 - 2018 Version 9.0 Rational Hydrology Study Date: 10/02/23 File:SNFC.out
SKILLED NURSING FACILITY
DMA C
PROPOSED CONDITION 100 -YEAR STORM
BY DP ON 10/2/23
*********
Hydrology Study Control Information **********
English (in -lb) Units used in input data file
Program License Serial Number 6482
Rational Method Hydrology Program based on
Riverside County Flood Control & Water Conservation District 1978 hydrology manual
Storm event (year) = 100.00 Antecedent Moisture Condition = 2 Standard intensity -duration curves data (Plate D-4.1)
For the [ Cathedral City ] area used.
10 year storm 10 minute intensity = 2.770(In/Hr)
10 year storm 60 minute intensity = 0.980(In/Hr)
100 year storm 10 minute intensity = 4.520(In/Hr)
100 year storm 60 minute intensity = 1.600(In/Hr)
Storm event year = 100.0
Calculated rainfall intensity data:
1 hour intensity = 1.600(In/Hr)
Slope of intensity duration curve = 0.5800
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 80.000 to Point/Station 90.000 **** INITIAL AREA EVALUATION ****
Initial area flow distance = 183.400(Ft.)
Top (of initial area) elevation = 12.430(Ft.)
Bottom (of initial area) elevation = 10.840(Ft.)
Difference in elevation = 1.590(Ft.)
Slope = 0.00867 s(percent)= 0.87
TC = k(0.300)*[(length^3)/(elevation change)]^0.2
Initial area time of concentration = 6.236 min.
Rainfall intensity = 5.949(In/Hr) for a 100.0 year storm COMMERCIAL subarea type
Runoff Coefficient = 0.871
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
11-648
Decimal fraction soil group D = 0.000
RI index for soil(AMC 2) = 32.00
Pervious area fraction = 0.100; Impervious fraction = 0.900 Initial subarea runoff = 9.067(CFS)
Total initial stream area = 1.750(Ac.)
Pervious area fraction = 0.100
End of computations, total study area = 1.75 (Ac.)
The following figures may
be used for a unit hydrograph study of the same area.
Area averaged pervious area fraction(Ap) = 0.100
Area averaged RI index number = 32.0
11-649
Riverside County Rational Hydrology Program
CIVILCADD/CIVILDESIGN Engineering Software,(c) 1989 - 2018 Version 9.0 Rational Hydrology Study Date: 10/02/23 File:SNFD.out
SKILLED NURSING FACILITY
DMA D
PROPOSED CONDITION 100 -YEAR STORM
BY DP ON 10/2/23
*********
Hydrology Study Control Information **********
English (in -lb) Units used in input data file
Program License Serial Number 6482
Rational Method Hydrology Program based on
Riverside County Flood Control & Water Conservation District 1978 hydrology manual
Storm event (year) = 100.00 Antecedent Moisture Condition = 2 Standard intensity -duration curves data (Plate D-4.1)
For the [ Cathedral City ] area used.
10 year storm 10 minute intensity = 2.770(In/Hr)
10 year storm 60 minute intensity = 0.980(In/Hr)
100 year storm 10 minute intensity = 4.520(In/Hr)
100 year storm 60 minute intensity = 1.600(In/Hr)
Storm event year = 100.0
Calculated rainfall intensity data:
1 hour intensity = 1.600(In/Hr)
Slope of intensity duration curve = 0.5800
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Process from Point/Station 100.000 to Point/Station 110.000 **** INITIAL AREA EVALUATION ****
Initial area flow distance = 179.800(Ft.)
Top (of initial area) elevation = 12.170(Ft.)
Bottom (of initial area) elevation = 10.400(Ft.)
Difference in elevation = 1.770(Ft.)
Slope = 0.00984 s(percent)= 0.98
TC = k(0.300)*[(length^3)/(elevation change)]^0.2
Initial area time of concentration = 6.031 min.
Rainfall intensity = 6.065(In/Hr) for a 100.0 year storm COMMERCIAL subarea type
Runoff Coefficient = 0.871
Decimal fraction soil group A = 1.000
Decimal fraction soil group B = 0.000
Decimal fraction soil group C = 0.000
11-650
Decimal fraction soil group D = 0.000
RI index for soil(AMC 2) = 32.00
Pervious area fraction = 0.100; Impervious fraction = 0.900 Initial subarea runoff = 2.959(CFS)
Total initial stream area = 0.560(Ac.)
Pervious area fraction = 0.100
End of computations, total study area = 0.56 (Ac.)
The following figures may
be used for a unit hydrograph study of the same area.
Area averaged pervious area fraction(Ap) = 0.100
Area averaged RI index number = 32.0
11-651
APPENDIX B
PROPOSED CONDITION HYDROLOGY MAP
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75-410 Gerald Ford Drive., Suite 1001 Palm Desert, CA 92211 Office: 760-346-7481
11-652
75-410 GERALD FORD DRIVE, SUITE 100, PALM DESERT CA 92211 PHONE: (760) 346-7481 · MBAKERINTL.COM
V
V VV
V V V V V V
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V V V
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FH
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X X X X X X X X X X X X X X X
◊◊◊◊
◊
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310
31 0
310
310
31 0
31 0
310
310
310
315
315
310
31 0
310
310
310
315
315
30 5
31 0
30 5
31 0
31 0
312.4 313.5312.9
312.8
312.6312.3312.2311.9311.6
311.8
311.1
310.8
310.4
311.8
311.8
309.2
311.8
311.8
307.8
311.5
309.3
309.3
309.3
310.7
309.8
309.4
309.3
309.3
309.3
308.7
308.4
309.2
309.2
308.3 308.7 311.3 310.2 310.7
310.6309.9309.2308.7
310.3
307.7
305.4
304.6
304.4
303.8
303.9
304.4
304.7
305.4
312.4
311.7
311.9
310.7
310.8
310.5
310.3
310.1
309.4
311.5
311.8 313.3
313.3
312.8 312.4 313.5312.8
313.3
316.1
313.5312.9
312.3
312.5
312.6
312.4
312.3
312.3
312.4
312.9
312.6
311.2
311.1
311.3
311.4 311.3
312.6311.8
311.8311.8
312.4
312.3
311.7
311.3
310.9
311.4 311.5 311.8 312.2 313.4
315.7
313.8315.4313.5313.7313.4
311.8
313.8 313.9 314.6 316.7 315.4
313.7313.4312.3310.8
311.3
310.4 311.4 310.3 310.3 311.2
309.9
311.7311.5311.8
310.7
311.5 311.6 311.6
309.9
310.1
311.7
312.2
311.7 312.3 312.3 311.6
310.9310.8309.6308.9308.4
308.8
309.4311.6
311.5
312.6310.8
313.3
309.8
310.5
311.1
311.7
309.2
312.3
311.9
309.3
305.2
304.9
Dense Vegetation
Ground Obscured
Dense Vegetation
Ground Obscured
Dense Vegetation
Ground Obscured
Dense Vegetation
Ground Obscured
Dense Vegetation
Ground Obscured
Dense Vegetation
Ground Obscured
Dense Vegetation
Ground Obscured
PE=11.93
SKILLED NURSING FACILITY
PROPOSED
FF=12.60
BUILDING SITE
PE=12.3
FF=12.90
FUTURE
11 -
6 5
3 APPENDIX C
SYNTHETIC UNIT HYDROGRAPH CALCULATIONS
www.mbakerintl.com
75-410 Gerald Ford Drive., Suite 1001 Palm Desert, CA 92211 Office: 760-346-7481
11-654
HYDROLOGY CALCULATIONS -
Using the RCFC&WCD Short Cut Unit Hydrograph Method
Area Designations Basin A
Drainage Area (ac.) 1.0100
Unit time (minutes) 5 5 5 15
100 Year Storm Duration (hrs) 1 3 6 24
Total Precipitation (Plates D -4.4,E-5.2, 5.4, 5.6)(in.) 1.76 2.49 3.24 4.78 Or data from NOAA interactive website Soils Group A
AMC index II Runoff Number (plate E-6.1) 32
Plate E-6.2 Pervious Area Loss Rate (Fp)(in/hr) 0.74 (AMC 11) Percentage of Impervious Cover (Ai)(%) (plate E-6.3) 74.83 (See impervious/pervious area calculations included in report) Weighted Average Loss Rate (F=Fp(1-.9Ai))(in./hr.) 0.24 (used for 1, 3, and 6 hour storm, the 24 hour storm uses variable maximum loss rate per plate E-1.1 (3 of 6)) Low Loss Rate Percent (%) 80
Retention Basin Percolation Rate (in/hr) (also used for drywell percolation rate) Percolation is taken incrementally.
Basin volume is calculated using the "truncated pyramid" formula, a more conservative estimate than "averaged end areas" sometimes used (Drywell can be "zeroed our by reducing numbers to less than .001, but should not entered as zeros or program chokes.) Drywell storage includes 40% of the 1' wide rock bed surrounding the drywell: formula (upper)*P10*(diaml2)^2+(lower)*PI()*((diam/2)"2+0.4*((diaml2+(grav+0.4166))"2-(diam12+0.4166)^2)) The drywell wall thickness is assumed at 5" (0.4166) and the gravel bed width is variable "gray" Drywell design factors Upper sec. (ft.)= 5 Lower sec. (ft.). 1 Ring diam. (ft.) = 4 Drywell lower max. (cf)= 298.45 Upper max.(cf)= 62.83 Gravel bed width around drwyell= 1 Drywell total(cf)= 361.28 Ret. Basin design (area, depth) Top = kt^i' 1 s.f. Bot. = 992.86 s.f. Max. Depth (d)= 4 Max. storage= 6543.14 (d/3)*(bottom+top+(bottom*top)"0.50) Formulas vol=(h/3)*(bottom+top+(bottom*top)"0.50) area=bottom+(h/d)*(top-bottom) Outside input from:
h=(vol*3)/(bottom+top+(bottom*top)^0.5) (values must be non -zero or error occurs) 1 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow % Rain (in/hr Max. Min. Rain (in/hr Rate (cfs) Vol. (cf) Input (cf) Area (sf) Perc. (cf) Vol. (cf) Depth (ft) Basin (cf) Area (sf) Perc. (cf) Vol. (cf) Depth (ft Vol. (cf) Rate (cfs) 0:05 3.7 0.7814 0.2416 N/A 0.5398 0.5497 164.92 0.00 30.89 0.21 164.71 8.28 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0:10 4.8 1.0138 0.2416 N/A 0.7721 0.7863 235.90 0.00 171.76 1.19 361.28 20.00 38.14 992.86 6.89 31.25 0.02 0.00 0.00 0:15 5.1 1.0771 0.2416 N/A 0.8355 0.8509 255.26 0.00 286.14 1.99 361.28 20.00 253.28 999.47 6.94 277.58 0.17 0.00 0.00 0:20 4.9 1.0349 0.2416 N/A 0.7932 0.8079 242.36 0.00 286.14 1.99 361.28 20.00 240.37 1051.62 7.30 510.65 0.31 0.00 0.00 0:25 6.6 1.3939 0.2416 N/A 1.1523 1.1735 352.05 0.00 286.14 1.99 361.28 20.00 350.07 1100.96 7.65 853.07 0.52 0.00 0.00 0:30 7.3 1.5418 0.2416 N/A 1.3001 1.3241 397.22 0.00 286.14 1.99 361.28 20.00 395.23 1173.44 8.15 1240.15 0.76 0.00 0.00 0:35 8.4 1.7741 0.2416 N/A 1.5324 1.5607 468.20 0.00 286.14 1.99 361.28 20.00 466.21 1255.38 8.72 1697.65 1.04 0.00 0.00 0:40 9 1.9008 0.2416 N/A 1.6592 1.6897 506.92 0.00 286.14 1.99 361.28 20.00 504.93 1352.23 9.39 2193.19 1.34 0.00 0.00 0:45 12.3 2.5978 0.2416 N/A 2.3561 2.3995 719.86 0.00 286.14 1.99 361.28 20.00 717.87 1457.13 10.12 2900.94 1.77 0.00 0.00 0:50 17.6 3.7171 0.2416 N/A 3.4755 3.5395 1061.85 0.00 286.14 1.99 361.28 20.00 1059.86 1606.95 11.16 3949.64 2.41 0.00 0.00 0:55 16.1 3.4003 0.2416 N/A 3.1587 3.2169 965.06 0.00 286.14 1.99 361.28 20.00 963.07 1828.94 12.70 4900.01 3.00 0.00 0.00 1:00 4.2 0.8870 0.2416 N/A 0.6454 0.6573 197.19 0.00 286.14 1.99 361.28 20.00 195.20 2030.12 14.10 5081.11 3.11 0.00 0.00 0 0.0000 0.2416 0.00 0.0000 0.0000 0.00 0.00 286.14 1.99 359.29 19.84 0.00 2068.46 14.36 5066.75 3.10 0.00 0.00 0 0.0000 0.2416 0.00 0.0000 0.0000 0.00 0.00 286.14 1.99 357.31 19.68 0.00 2065.42 14.34 5052.41 3.09 0.00 0.00 1:15 0 0.0000 0.2416 0.00 0.0000 0.0000 0.00 0.00 286.14 1.99 355.32 19.53 0.00 2062.38 14.32 5038.08 3.08 0.00 0.00 Total volume (cf) 5566.79 Total Overflow (cf)
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3 Hour Storm in 5 minute increments Drywell Drywell Drywell Dry well Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flo w Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflo w Overflow % Rain (in/hr Max. Min . Rain (in/hr Rate (cfs) Vol. (cf) Input (cf) Area (sf) Perc. (cf, Vol. (cf) Depth (ft) Basin (cf) Area (sf) Perc . (cf) Vol. (cf) Depth (ft Vol. (cf) Rate (cfs) 0:05 1.3 0.39 0.24 N/A 0 .1468 0 .1495 44.85 0.00 30 .89 0.21 44.64 2.24 0.00 0.00 0.00 0 .00 0.00 0.00 0 .00 0:10 1. 3 0.39 0.24 N/A 0 .1468 0.1495 44.85 0.00 69 .07 0.48 89.01 4.47 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 0:15 1. 1 0.33 0.24 N/A 0 .0870 0 .0887 26.60 0.00 107.02 0.74 114.86 5.77 0.00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 0:20 1.5 0.45 0 .24 N/A 0.2066 0.2104 63 .11 0 .00 129.13 0 .90 177 .08 8 .90 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 0:25 1.5 0. 45 0 .24 N/A 0.2066 0 .2104 63 .11 0 .00 182.34 1.27 238 .93 12 .01 0.00 0 .00 0.00 0.00 0 .00 0.00 0.00 0:30 1.8 0.54 0.24 N/A 0.2962 0.3017 90.50 0.00 235 .23 1.63 349.72 19.08 0 .00 0.00 0.00 0 .00 0 .00 0.00 0 .00 0:35 1. 5 0.45 0.24 N/A 0 .2066 0.2104 63.11 0.00 286 .14 1.99 361.28 20.00 49.56 992.86 6 .89 42.67 0.03 0 .00 0 .00 0:40 1. 8 0.54 0.24 N/A 0 .2962 0.3017 90.50 0.00 286.14 1.99 361.28 20.00 88.51 1001 .89 6 .96 124 .22 0 .08 0 .00 0 .00 0:45 1.8 0. 54 0. 24 N/A 0.2962 0.3017 90 .50 0 .00 286.14 1 .99 361 .28 20 .00 88.51 1019.16 7.08 205.66 0.13 0.00 0.00 0:50 1.5 0. 45 0. 24 N/A 0.2066 0.2104 63 .11 0 .00 286.14 1 .99 361.28 20 .00 61.12 1036.39 7.20 259.58 0 .16 0.00 0 .00 0:55 1. 6 0.48 0.24 N/A 0.2364 0.2408 72.24 0.00 286 .14 1.99 361.28 20.00 70.25 1047.81 7 .28 322 .56 0 .20 0.00 0.00 1:00 1. 8 0.54 0.24 N/A 0.2962 0 .3017 90.50 0.00 286.14 1.99 361.28 20.00 88.51 1061 .14 7 .37 403.70 0 .25 0 .00 0 .00 1:05 2. 2 0.66 0.24 N/A 0.4157 0 .4234 127.02 0.00 286.14 1.99 361.28 20.00 125.03 1078 .32 7 .49 521.24 0 .32 0 .00 0 .00 1:10 2.2 0. 66 0. 24 N/A 0. 4157 0.4234 127 .02 0 .00 286.14 1.99 361.28 20 .00 125.03 1103.20 7.66 638.61 0 .39 0.00 0 .00 1:15 2. 2 0. 66 0. 24 N/A 0.4157 0.4234 127.02 0 .00 286.14 1 .99 361 .28 20 .00 125.03 1128.04 7 .83 755.81 0.46 0.00 0 .00 1:20 2 0.60 0.24 N/A 0.3560 0.3625 108.76 0.00 286 .14 1.99 361 .28 20.00 106.77 1152.85 8.01 854.57 0.52 0.00 0.00 1:25 2.6 0.78 0.24 N/A 0.5352 0.5451 163.53 0.00 286 .14 1.99 361.28 20.00 161.54 1173.76 8.15 1007.96 0.62 0 .00 0.00 1:30 2. 7 0.81 0.24 N/A 0. 5651 0. 5755 172.66 0.00 286.14 1.99 361.28 20.00 170.67 1206 .23 8.38 1170 .26 0 .72 0 .00 0 .00 1:35 2.4 0. 72 0. 24 N/A 0.4755 0.4842 145 .27 0 .00 286.14 1 .99 361 .28 20 .00 143.29 1240.59 8.62 1304 .93 0.80 0.00 0.00 1:40 2.7 0. 81 0. 24 N/A 0.5651 0.5755 172.66 0 .00 286.14 1 .99 361.28 20 .00 170.67 1269.10 8.81 1466.79 0 .90 0.00 0 .00 1:45 3. 3 0.99 0.24 N/A 0.7444 0. 7581 227.44 0.00 286.14 1.99 361.28 20.00 225.45 1303 .36 9 .05 1683.19 1.03 0.00 0.00 1:50 3. 1 0.93 0.24 N/A 0. 6846 0.6973 209.18 0.00 286.14 1.99 361.28 20.00 207.19 1349 .17 9.37 1881.01 1 .15 0 .00 0 .00 1:55 2. 9 0.87 0.24 N/A 0. 6249 0. 6364 190.92 0.00 286 .14 1.99 361.28 20.00 188 .93 1391 .04 9 .66 2060.28 1 .26 0 .00 0 .00 2:00 3 0. 90 0. 24 N/A 0.6548 0.6668 200. 05 0.00 286.14 1 .99 361.28 20 .00 198.06 1428.99 9.92 2248.42 1.37 0.00 0 .00 2:05 3.1 0. 93 0. 24 N/A 0.6846 0.6973 209. 18 0.00 286.14 1 .99 361 .28 20 .00 207.19 1468 .82 10 .20 2445.41 1.49 0.00 0.00 2:10 4.2 1.25 0.24 N/A 1.0133 1.0320 309.60 0.00 286 .14 1.99 361 .28 20.00 307.61 1510.52 10.49 2742 .53 1.68 0.00 0 .00 2:15 5 1.49 0.24 N/A 1. 2524 1.2754 382.63 0.00 286.14 1.99 361.28 20.00 380.64 1573.41 10.93 3112.24 1 .90 0 .00 0 .00 2:20 3. 5 1.05 0.24 N/A 0. 8042 0. 8190 245.69 0.00 286.14 1.99 361.28 20.00 243.71 1651 .68 11 .47 3344.48 2 .04 0 .00 0 .00 2:25 6.8 2. 03 0. 24 N/A 1. 7902 1.8232 546. 95 0. 00 286.14 1 .99 361 .28 20 .00 544.97 1700 .84 11.81 3877.64 2 .37 0.00 0.00 2:30 7.3 2. 18 0. 24 N/A 1.9396 1.9753 592. 60 0. 00 286.14 1.99 361.28 20 .00 590.61 1813.70 12.60 4455.65 2.72 0.00 0 .00 2:35 8.2 2.45 0.24 N/A 2. 2085 2.2492 674.76 0.00 286. 14 1.99 361.28 20.00 672.77 1936.06 13 .44 5114.98 3 .13 0.00 0 .00 2:40 5. 9 1.76 0.24 N/A 1. 5213 1. 5493 464.79 0.00 286.14 1.99 361.28 20.00 462.80 2075 .63 14 .41 5563 .37 3 .40 0 .00 0 .00 2:45 2 0.60 0.24 N/A 0. 3560 0. 3625 108.76 0.00 286. 14 1.99 361.28 20.00 106.77 2170 .55 15 .07 5655.07 3.46 0 .00 0 .00 2:50 1.8 0. 54 0. 24 N/A 0.2962 0.3017 90. 50 0. 00 286.14 1.99 361.28 20 .00 88.51 2189.96 15.21 5728.37 3 .50 0.00 0 .00 2:55 1.8 0. 54 0. 24 N/A 0.2962 0. 3017 90. 50 0. 00 286.14 1. 99 361.28 20 .00 88.51 2205.47 15.32 5801.57 3.55 0 .00 0 .00 3:00 0.6 0.18 0.24 0. 14 0.0359 0.0365 10.95 0.00 286. 14 1.99 361.28 20.00 8.97 2220.97 15 .42 5795 .11 3.54 0.00 0 .00 0 0.00 0.24 0.00 0. 0000 0. 0000 0.00 0.00 286. 14 1.99 359.29 19.84 0 .00 2219.60 15.41 5779.70 3.53 0 .00 0 .00 0 0.00 0.24 0.00 0. 0000 0. 0000 0.00 0.00 286.14 1.99 357.31 19.68 0 .00 2216 .34 15 .39 5764 .31 3 .52 0 .00 0 .00 3:15 0 0. 00 0. 24 0. 00 0.0000 0.0000 0. 00 0. 00 286.14 1. 99 355. 32 19.53 0.00 2213.08 15.37 5748.94 3.51 0.00 0.00 0 0. 00 0. 24 0.00 0.0000 0.0000 0. 00 0. 00 286.14 1. 99 353.33 19. 37 0.00 2209.83 15 .35 5733.59 3.51 0.00 0 .00 0 0.00 0.24 0.00 0.0000 0.0000 0.00 0.00 286.14 1.99 351.35 19.21 0.00 2206 .58 15 .32 5718 .27 3.50 0.00 0.00 3:30 0 0.00 0.24 0.00 0. 0000 0. 0000 0.00 0.00 286.14 1.99 349.36 19.05 0.00 2203 .34 15 .30 5702.97 3 .49 0 .00 0 .00 0 0.00 0.24 0.00 0. 0000 0. 0000 0.00 0.00 286. 14 1.99 347.37 18.89 0.00 2200.10 15 .28 5687.69 3 .48 0.00 0.00 0 0.00 0.24 0. 00 0.0000 0.0000 0.00 0.00 286. 14 1.99 345.38 18.73 0. 00 2196.86 15.26 5672 .43 3.47 0.00 0.00 Total volume (cf) 6501.40 Total Overflow (cf) 0.00
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6 Hour Storm in 5 minute increments Dry well Drywell Dry well Drywell Overflow Basin Basin Basin Time Pattem Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflo w Overflow % Rain (in/hr Max. Min . Rain (in/hr Rate (cfs) Vol. (cf) Input (cf) Area (sf) Perc . (cf, Vol . (cf) Depth (ft) Basin (cf) Area (sf) Perc . (cf) Vol. (cf) Depth (ft Vol . (cf) Rate (cfs) 0:05 0.5 0 .19 0 .24 0.16 0.0389 0.0396 11 .88 0 .00 30.89 0 .21 11 .66 0 .59 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 0:10 0.6 0.23 0.24 0.19 0.0467 0 .0475 14.25 0.00 40 .87 0.28 25.64 1.29 0.00 0.00 0.00 0 .00 0 .00 0.00 0 .00 0:15 0. 6 0.23 0.24 0.19 0 .0467 0 .0475 14.25 0.00 52.82 0 .37 39.52 1.99 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 0:20 0. 6 0.23 0.24 0.19 0 .0467 0 .0475 14.25 0.00 64 .69 0.45 53.33 2.68 0.00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 0:25 0.6 0.23 0 .24 0.19 0.0467 0.0475 14 .25 0 .00 76.50 0.53 67.05 3.37 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 0:30 0.7 0. 27 0 .24 0.22 0.0544 0.0554 16 .63 0 .00 88.24 0.61 83 .07 4 .18 0.00 0.00 0.00 0.00 0 .00 0.00 0.00 0:35 0.7 0.27 0.24 0 .22 0.0544 0.0554 16.63 0.00 101 .94 0.71 98.99 4.98 0 .00 0.00 0.00 0 .00 0 .00 0.00 0 .00 0:40 0. 7 0.27 0.24 0.22 0 .0544 0.0554 16.63 0.00 115.56 0.80 114.82 5.77 0.00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 0:45 0. 7 0.27 0.24 0.22 0 .0544 0.0554 16.63 0.00 129.09 0.90 130.55 6.56 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 0:50 0.7 0. 27 0. 24 0.22 0.0544 0.0554 16 .63 0 .00 142.55 0 .99 146 .19 7 .35 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0:55 0.7 0. 27 0. 24 0.22 0.0544 0.0554 16 .63 0 .00 155.93 1 .08 161 .74 8 .13 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 1:00 0.8 0.31 0.24 N/A 0.0694 0 .0707 21.21 0.00 169 .22 1.18 181.77 9.14 0.00 0.00 0.00 0 .00 0.00 0.00 0.00 1:05 0. 8 0.31 0.24 N/A 0.0694 0.0707 21.21 0.00 186 .35 1.29 201.68 10.14 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 1:10 0. 8 0.31 0.24 N/A 0.0694 0 .0707 21.21 0.00 203.38 1.41 221.48 11.13 0.00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 1:15 0.8 0. 31 0. 24 N/A 0.0694 0.0707 21 .21 0 .00 220.31 1.53 241 .15 12 .12 0.00 0.00 0.00 0.00 0 .00 0.00 0 .00 1:20 0.8 0. 31 0. 24 N/A 0.0694 0.0707 21.21 0 .00 237.14 1.65 260 .71 13 .10 0.00 0.00 0.00 0.00 0.00 0.00 0 .00 1:25 0.8 0.31 0.24 N/A 0.0694 0.0707 21.21 0.00 253 .87 1.76 280.15 14.08 0.00 0.00 0.00 0 .00 0.00 0.00 0.00 1:30 0. 8 0.31 0.24 N/A 0. 0694 0.0707 21.21 0.00 270.50 1.88 306.22 15.62 0.00 0 .00 0 .00 0.00 0 .00 0 .00 0.00 1:35 0. 8 0.31 0.24 N/A 0. 0694 0.0707 21.21 0.00 286.14 1.99 325.44 17.15 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 1:40 0.8 0. 31 0. 24 N/A 0.0694 0.0707 21.21 0 .00 286.14 1 .99 344 .66 18 .68 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1:45 0.8 0. 31 0. 24 N/A 0.0694 0.0707 21.21 0 .00 286.14 1 .99 361.28 20 .00 2.60 992.86 2.60 0.00 0 .00 0.00 0 .00 1:50 0.8 0.31 0.24 N/A 0.0694 0. 0707 21.21 0.00 286.14 1.99 361.28 20.00 19.22 992.86 6 .89 12 .32 0 .01 0.00 0.00 1:55 0. 8 0.31 0.24 N/A 0. 0694 0.0707 21.21 0.00 286.14 1.99 361.28 20.00 19 .22 995 .47 6.91 24.63 0 .02 0 .00 0 .00 2:00 0. 9 0.35 0.24 N/A 0. 1083 0. 1103 33.08 0.00 286 .14 1.99 361.28 20.00 31.10 998 .07 6 .93 48.80 0 .03 0 .00 0 .00 2:05 0.8 0. 31 0. 24 N/A 0.0694 0.0707 21. 21 0.00 286.14 1 .99 361.28 20 .00 19 .22 1003.19 6.97 61.05 0 .04 0.00 0 .00 2:10 0.9 0. 35 0. 24 N/A 0. 1083 0. 1103 33. 08 0.00 286.14 1 .99 361 .28 20 .00 31.10 1005 .78 6.98 85.16 0.05 0.00 0.00 2:15 0.9 0.35 0.24 N/A 0.1083 0.1103 33.08 0.00 286 .14 1.99 361 .28 20.00 31.10 1010.89 7.02 109.24 0 .07 0.00 0 .00 2:20 0. 9 0.35 0.24 N/A 0.1083 0.1103 33.08 0.00 286.14 1.99 361.28 20.00 31.10 1015.98 7 .06 133.28 0.08 0 .00 0 .00 2:25 0. 9 0.35 0.24 N/A 0. 1083 0.1103 33.08 0.00 286.14 1.99 361.28 20.00 31.10 1021 .07 7 .09 157 .29 0 .10 0 .00 0 .00 2:30 0.9 0. 35 0. 24 N/A 0.1083 0.1103 33. 08 0. 00 286.14 1 .99 361 .28 20 .00 31.10 1026.16 7.13 181.26 0.11 0.00 0.00 2:35 0.9 0. 35 0. 24 N/A 0.1083 0.1103 33. 08 0. 00 286.14 1.99 361.28 20 .00 31.10 1031.23 7.16 205.20 0 .13 0.00 0 .00 2:40 0.9 0.35 0.24 N/A 0.1083 0. 1103 33.08 0.00 286. 14 1.99 361.28 20.00 31.10 1036 .30 7 .20 229.10 0 .14 0.00 0 .00 2:45 1 0.39 0.24 N/A 0. 1472 0. 1499 44.96 0.00 286.14 1.99 361.28 20.00 42.98 1041 .36 7 .23 264.84 0 .16 0 .00 0 .00 2:50 1 0.39 0.24 N/A 0.1472 0. 1499 44.96 0.00 286. 14 1.99 361.28 20.00 42.98 1048.92 7 .28 300.53 0 .18 0 .00 0 .00 2:55 1 0. 39 0. 24 N/A 0.1472 0.1499 44.96 0. 00 286.14 1.99 361.28 20 .00 42.98 1056 .48 7.34 336.17 0 .21 0.00 0 .00 3:00 1 0. 39 0. 24 N/A 0.1472 0.1499 44. 96 0. 00 286.14 1. 99 361.28 20 .00 42.98 1064.02 7.39 371.76 0 .23 0.00 0 .00 3:05 1 0.39 0.24 N/A 0.1472 0.1499 44.96 0.00 286. 14 1.99 361.28 20.00 42.98 1071.56 7.44 407.29 0 .25 0.00 0 .00 3:10 1. 1 0.43 0.24 N/A 0.1860 0.1895 56.84 0.00 286. 14 1.99 361.28 20.00 54.86 1079 .08 7 .49 454.66 0.28 0 .00 0 .00 3:15 1. 1 0.43 0.24 N/A 0. 1860 0.1895 56.84 0.00 286.14 1.99 361.28 20.00 54.86 1089 .10 7 .56 501.95 0 .31 0 .00 0 .00 3:20 1.1 0. 43 0. 24 N/A 0.1860 0.1895 56. 84 0. 00 286.14 1. 99 361. 28 20.00 54.86 1099 .12 7.63 549 .17 0.34 0.00 0.00 3:25 1.2 0. 47 0. 24 N/A 0.2249 0.2291 68. 72 0. 00 286.14 1. 99 361.28 20. 00 66.73 1109.11 7.70 608.20 0 .37 0.00 0 .00 3:30 1.3 0.51 0.24 N/A 0.2638 0. 2687 80.60 0.00 286.14 1.99 361.28 20.00 78.61 1121.61 7 .79 679 .03 0.42 0.00 0.00 3:35 1. 4 0.54 0.24 N/A 0. 3027 0.3083 92. 48 0.00 286.14 1.99 361.28 20.00 90.49 1136 .60 7 .89 761.62 0 .47 0 .00 0 .00 3:40 1. 4 0.54 0.24 N/A 0. 3027 0. 3083 92.48 0.00 286.14 1.99 361.28 20.00 90.49 1154 .09 8 .01 844.10 0 .52 0 .00 0 .00 3:45 1.5 0.58 0.24 N/A 0.3416 0.3479 104. 36 0.00 286. 14 1.99 361. 28 20.00 102.37 1171.54 8.14 938.34 0 .57 0.00 0 .00 3:50 1.5 0. 58 0. 24 N/A 0. 3416 0.3479 104. 36 0. 00 286.14 1. 99 361. 28 20. 00 102.37 1191.49 8 .27 1032.43 0 .63 0.00 0.00 3:55 1.6 0.62 0.24 N/A 0.3804 0.3875 116.24 0.00 286. 14 1.99 361. 28 20.00 114.25 1211.41 8.41 1138.27 0 .70 0.00 0 .00 4:00 1. 6 0.62 0.24 N/A 0.3804 0.3875 116.24 0.00 286.14 1.99 361.28 20.00 114.25 1233.82 8.57 1243.95 0.76 0 .00 0 .00 4:05 1. 7 0.66 0.24 N/A 0.4193 0.4271 128.12 0.00 286.14 1.99 361.28 20.00 126.13 1256. 19 8.72 1361 .35 0 .83 0 .00 0 .00 4:10 1.8 0. 70 0. 24 N/A 0. 4582 0.4666 139.99 0. 00 286.14 1. 99 361. 28 20. 00 138.01 1281.04 8.90 1490 .47 0.91 0.00 0.00 4:15 1.9 0. 74 0. 24 N/A 0.4971 0.5062 151. 87 0. 00 286.14 1.99 361.28 20. 00 149. 89 1308.37 9.09 1631.27 1.00 0.00 0 .00
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4:20 2 0.78 0.24 N/A 0.5360 0 .5458 163.75 0.00 286.14 1.99 361.28 20.00 161.76 1338.18 9 .29 1783.74 1 .09 0 .00 0 .00 4:25 2 .1 0.82 0.24 N/A 0 .5748 0 .5854 175.63 0.00 286.14 1.99 361.28 20.00 173 .64 1370.45 9.52 1947.86 1 .19 0 .00 0 .00 4:30 2.1 0 .82 0 .24 N/A 0.5748 0.5854 175 .63 0 .00 286.14 1 .99 361 .28 20 .00 173.64 1405.20 9.76 2111.75 1.29 0.00 0.00 4:35 2.2 0 .86 0 .24 N/A 0.6137 0.6250 187 .51 0 .00 286.14 1.99 361.28 20 .00 185.52 1439.89 10.00 2287.27 1.40 0.00 0 .00 4:40 2.3 0.89 0.24 N/A 0 .6526 0 .6646 199.39 0.00 286.14 1.99 361.28 20.00 197.40 1477.04 10 .26 2474.41 1.51 0.00 0 .00 4:45 2. 4 0.93 0.24 N/A 0 .6915 0.7042 211.27 0.00 286.14 1.99 361.28 20.00 209.28 1516 .66 10.53 2673.16 1 .63 0 .00 0 .00 4:50 2. 4 0.93 0.24 N/A 0 .6915 0 .7042 211.27 0.00 286 .14 1.99 361.28 20.00 209.28 1558.73 10 .82 2871.62 1 .76 0 .00 0 .00 4:55 2.5 0.97 0 .24 N/A 0.7304 0.7438 223 .15 0 .00 286.14 1 .99 361.28 20 .00 221.16 1600.74 11.12 3081.66 1.88 0.00 0 .00 5:00 2. 6 1. 01 0 .24 N/A 0 .7692 0 .7834 235 .02 0 .00 286.14 1 .99 361 .28 20 .00 233.04 1645.20 11 .43 3303.27 2.02 0.00 0.00 5:05 3.1 1.21 0.24 N/A 0 .9636 0.9814 294.42 0.00 286 .14 1.99 361 .28 20.00 292.43 1692.12 11.75 3583 .95 2.19 0.00 0 .00 5:10 3.6 1.40 0.24 N/A 1.1580 1 .1794 353.81 0.00 286 .14 1.99 361.28 20.00 351.83 1751.53 12.16 3923.61 2.40 0 .00 0 .00 5:15 3. 9 1.52 0.24 N/A 1 .2747 1 .2982 389.45 0.00 286.14 1.99 361.28 20.00 387.46 1823.43 12 .66 4298.41 2 .63 0 .00 0 .00 5:20 4.2 1. 63 0. 24 N/A 1.3913 1.4170 425 .09 0 .00 286.14 1 .99 361 .28 20 .00 423.10 1902 .77 13.21 4708.30 2.88 0.00 0.00 5:25 4.7 1. 83 0. 24 N/A 1.5857 1.6149 484.48 0 .00 286.14 1 .99 361.28 20 .00 482.49 1989.54 13.82 5176.97 3.16 0.00 0 .00 5:30 5.6 2.18 0.24 N/A 1.9356 1.9713 591.39 0.00 286 .14 1.99 361.28 20.00 589.40 2088.75 14 .51 5751 .87 3.52 0.00 0.00 5:35 1. 9 0.74 0.24 N/A 0.4971 0 .5062 151.87 0.00 286.14 1.99 361.28 20.00 149 .89 2210 .45 15.35 5886.41 3 .60 0 .00 0 .00 5:40 0. 9 0.35 0.24 N/A 0.1083 0 .1103 33.08 0.00 286.14 1.99 361.28 20.00 31.10 2238 .93 15.55 5901.96 3.61 0 .00 0 .00 5:45 0.6 0. 23 0. 24 0.19 0.0467 0.0475 14 .25 0 .00 286.14 1.99 361.28 20 .00 12.27 2242.22 15.57 5898.65 3 .61 0.00 0 .00 5:50 0.5 0. 19 0. 24 0.16 0.0389 0.0396 11 .88 0 .00 286.14 1 .99 361 .28 20 .00 9.89 2241 .52 15.57 5892.98 3.60 0.00 0 .00 5:55 0.3 0.12 0.24 0. 09 0.0233 0.0238 7.13 0.00 286 .14 1.99 361 .28 20.00 5.14 2240.32 15.56 5882 .56 3.60 0.00 0.00 6:00 0. 2 0.08 0.24 0.06 0. 0156 0.0158 4.75 0.00 286 .14 1.99 361.28 20.00 2 .76 2238.11 15 .54 5869.78 3 .59 0 .00 0.00 0 0.00 0.24 0.00 0. 0000 0.0000 0.00 0.00 286.14 1.99 359.29 19.84 0 .00 2235.41 15.52 5854 .26 3 .58 0 .00 0 .00 0 0. 00 0. 24 0. 00 0.0000 0.0000 0 .00 0 .00 286.14 1 .99 357 .31 19.68 0.00 2232.12 15.50 5838 .76 3.57 0.00 0.00 6:15 0 0. 00 0. 24 0.00 0.0000 0.0000 0.00 0 .00 286.14 1 .99 355.32 19 .53 0 .00 2228.84 15.48 5823.28 3.56 0.00 0 .00 0 0.00 0.24 0.00 0.0000 0.0000 0.00 0.00 286.14 1.99 353.33 19.37 0.00 2225 .57 15 .46 5807 .82 3.55 0.00 0.00 0 0.00 0.24 0.00 0. 0000 0. 0000 0.00 0.00 286.14 1.99 351.35 19.21 0 .00 2222 .29 15.43 5792 .39 3 .54 0 .00 0 .00 6:30 0 0.00 0.24 0.00 0. 0000 0. 0000 0.00 0.00 286 .14 1.99 349.36 19.05 0.00 2219 .03 15 .41 5776.98 3 .53 0 .00 0 .00 0 0. 00 0. 24 0.00 0.0000 0.0000 0. 00 0.00 286.14 1 .99 347 .37 18 .89 0 .00 2215.77 15.39 5761.59 3.52 0.00 0 .00 0 0. 00 0. 24 0.00 0.0000 0.0000 0. 00 0.00 286.14 1 .99 345 .38 18 .73 0.00 2212 .51 15 .36 5746.23 3 .51 0.00 0.00 6:45 0 0.00 0.24 0. 00 0.0000 0.0000 0.00 0.00 286 .14 1.99 343 .40 18.58 0 .00 2209.26 15 .34 5730 .89 3.50 0.00 0 .00 0 0.00 0.24 0.00 0. 0000 0. 0000 0.00 0.00 286.14 1.99 341.41 18.42 0 .00 2206 .01 15.32 5715.57 3.49 0 .00 0 .00 0 0.00 0.24 0.00 0. 0000 0. 0000 0.00 0.00 286.14 1.99 339.42 18.26 0 .00 2202 .76 15 .30 5700 .27 3 .48 0 .00 0 .00 7:00 0 0. 00 0. 24 0. 00 0.0000 0.0000 0. 00 0. 00 286.14 1 .99 337 .44 18 .10 0.00 2199.53 15.27 5685.00 3.48 0.00 0.00 Total volume (cf) 6844. 04 Total Overflow (cf)
5 of 26
24 Hour Storm in 15 minute increments Dry well Drywell Dry well Drywell Overflow Basin Basin Basin Time Pattem Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflo w Overflow % Rain (in/hr Max. Min . Rain (in/hr Rate (cfs) Vol. (cf) Input (cf) Area (sf) Perc . (cf, Vol . (cf) Depth (ft) Basin (cf) Area (sf) Perc . (cf) Vol. (cf) Depth (ft Vol . (cf) Rate (cfs) 0:15 0.2 0 .04 0 .42 0.03 0.0076 0.0078 7 .01 0 .00 30.89 0 .64 6 .37 0 .32 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 0:30 0.3 0.06 0.42 0.05 0 .0115 0 .0117 10.51 0.00 36.34 0.76 16.12 0.81 0.00 0.00 0.00 0 .00 0 .00 0.00 0 .00 0:45 0. 3 0.06 0.41 0.05 0 .0115 0.0117 10.51 0.00 44 .68 0.93 25.71 1.29 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 1:00 0. 4 0.08 0.41 0.06 0 .0153 0 .0156 14.02 0.00 52.88 1.10 38.63 1.94 0.00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 1:15 0.3 0.06 0 .40 0.05 0.0115 0.0117 10 .51 0 .00 63.93 1.33 47 .81 2 .40 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 1:30 0.3 0. 06 0 .40 0.05 0 .0115 0 .0117 10 .51 0 .00 71.78 1 .50 56 .83 2 .86 0.00 0.00 0.00 0.00 0 .00 0.00 0.00 1:45 0.3 0.06 0.40 0 .05 0.0115 0.0117 10.51 0.00 79.50 1.66 65.69 3.30 0 .00 0.00 0.00 0 .00 0 .00 0.00 0 .00 2:00 0. 4 0.08 0.39 0.06 0.0153 0.0156 14.02 0.00 87.07 1.81 77.89 3.91 0.00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 2:15 0. 4 0.08 0.39 0.06 0 .0153 0 .0156 14.02 0.00 97.51 2.03 89.88 4.52 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 2:30 0.4 0. 08 0. 38 0.06 0.0153 0.0156 14 .02 0 .00 107.76 2.25 101 .66 5 .11 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2:45 0.5 0. 10 0. 38 0.08 0.0191 0.0195 17 .52 0 .00 117.84 2 .45 116 .73 5 .87 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 3:00 0.5 0.10 0.37 0.08 0.0191 0 .0195 17.52 0.00 130 .72 2.72 131.53 6.61 0.00 0.00 0.00 0 .00 0.00 0.00 0.00 3:15 0. 5 0.10 0.37 0.08 0.0191 0.0195 17.52 0.00 143.38 2.99 146.07 7.34 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 3:30 0. 5 0.10 0.36 0.08 0.0191 0 .0195 17.52 0.00 155.82 3 .25 160.35 8.06 0.00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 3:45 0.5 0. 10 0. 36 0.08 0.0191 0.0195 17 .52 0 .00 168.03 3.50 174 .37 8 .76 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 4:00 0.6 0. 11 0. 35 0.09 0. 0229 0.0234 21 .03 0 .00 180.02 3 .75 191 .65 9.63 0.00 0.00 0.00 0.00 0.00 0.00 0 .00 4:15 0.6 0.11 0.35 0. 09 0.0229 0.0234 21.03 0.00 194.80 4.06 208.62 10.49 0.00 0.00 0.00 0 .00 0.00 0.00 0.00 4:30 0. 7 0.13 0.34 0.11 0.0268 0.0273 24.53 0.00 209.32 4.36 228.79 11.50 0.00 0 .00 0 .00 0.00 0 .00 0 .00 0.00 4:45 0. 7 0.13 0.34 0.11 0. 0268 0.0273 24.53 0.00 226.57 4.72 248.61 12.50 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 5:00 0.8 0. 15 0. 34 0. 12 0.0306 0.0312 28 .04 0 .00 243.52 5.07 271 .58 13 .65 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5:15 0.6 0. 11 0. 33 0.09 0.0229 0.0234 21.03 0 .00 263.16 5 .48 287 .12 14 .43 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 5:30 0.7 0.13 0. 33 0.11 0. 0268 0. 0273 24.53 0.00 276.46 5.76 310.07 15.92 0.00 0.00 0.00 0 .00 0 .00 0.00 0.00 5:45 0. 8 0.15 0.32 0.12 0. 0306 0.0312 28.04 0.00 286.14 5.96 332.15 17.68 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 6:00 0. 8 0.15 0.32 0.12 0. 0306 0. 0312 28.04 0.00 286 .14 5.96 354.23 19.44 0.00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 6:15 0.9 0. 17 0. 31 0.14 0.0344 0.0350 31. 54 0.00 286.14 5 .96 361.28 20 .00 18.53 992.86 18.53 0.00 0 .00 0.00 0 .00 6:30 0.9 0. 17 0. 31 0.14 0. 0344 0. 0350 31. 54 0.00 286.14 5 .96 361 .28 20 .00 25.58 992 .86 20 .68 4.90 0 .00 0.00 0.00 6:45 1 0.19 0.31 0. 15 0.0382 0.0389 35.05 0.00 286 .14 5.96 361 .28 20.00 29.09 993.90 20.71 13 .28 0 .01 0.00 0 .00 7:00 1 0.19 0.30 0.15 0.0382 0.0389 35.05 0.00 286.14 5.96 361.28 20.00 29.09 995 .67 20.74 21.63 0.01 0 .00 0 .00 7:15 1 0.19 0.30 0.15 0. 0382 0. 0389 35.05 0.00 286.14 5.96 361.28 20.00 29.09 997 .44 20 .78 29.94 0 .02 0 .00 0 .00 7:30 1.1 0. 21 0. 29 0. 17 0.0421 0.0428 38. 55 0. 00 286.14 5 .96 361 .28 20 .00 32.59 999.20 20.82 41.71 0.03 0.00 0.00 7:45 1.2 0. 23 0. 29 0.18 0.0459 0.0467 42.06 0. 00 286.14 5 .96 361.28 20 .00 36.10 1001.69 20.87 56.94 0 .03 0.00 0 .00 8:00 1. 3 0.25 0.29 0.20 0.0497 0. 0506 45.56 0.00 286. 14 5.96 361.28 20.00 39.60 1004.91 20 .94 75 .61 0 .05 0.00 0 .00 8:15 1. 5 0.29 0.28 0.23 0. 0574 0.0584 52.57 0.00 286.14 5.96 361.28 20.00 46.61 1008 .87 21 .02 101 .21 0 .06 0 .00 0 .00 8:30 1. 5 0.29 0.28 0.23 0. 0574 0. 0584 52.57 0.00 286. 14 5.96 361.28 20.00 46.61 1014 .28 21 .13 126.69 0 .08 0 .00 0 .00 8:45 1.6 0. 31 0. 27 0.24 0.0612 0.0623 56. 08 0. 00 286.14 5. 96 361.28 20 .00 50.12 1019.68 21.24 155.56 0 .10 0.00 0 .00 9:00 1.7 0. 33 0. 27 0.26 0.0650 0. 0662 59. 58 0. 00 286.14 5. 96 361.28 20 .00 53.62 1025.79 21 .37 187.82 0 .11 0.00 0 .00 9:15 1.9 0.36 0.27 N/A 0.0975 0.0993 89.34 0.00 286. 14 5.96 361.28 20.00 83.37 1032.62 21.51 249 .68 0 .15 0.00 0 .00 9:30 2 0.38 0.26 N/A 0.1204 0.1226 110.34 0.00 286. 14 5.96 361.28 20.00 104.37 1045.71 21.79 332.27 0.20 0 .00 0 .00 9:45 2. 1 0.40 0.26 N/A 0. 1433 0.1459 131.30 0.00 286.14 5.96 361.28 20.00 125.34 1063 .20 22 .15 435 .46 0 ,27 0 .00 0 .00 10:00 22 0. 42 0. 25 N/A 0. 1661 0.1692 152. 24 0. 00 286.14 5. 96 361. 28 20.00 146.28 1085.04 22.61 559 .13 0.34 0.00 0.00 10:15 1.5 0. 29 0. 25 0.23 0.0574 0.0584 52.57 0. 00 286.14 5. 96 361.28 20. 00 46.61 1111.22 23.15 582.59 0 .36 0.00 0 .00 10:30 1.5 0.29 0.25 0. 23 0.0574 0. 0584 52.57 0.00 286.14 5.96 361.28 20.00 46.61 1116.19 23 .25 605.95 0 .37 0.00 0.00 10:45 2 0.38 0.24 N/A 0. 1388 0.1413 127.21 0.00 286.14 5.96 361.28 20.00 121.25 1121 .13 23 .36 703.85 0 .43 0 .00 0 .00 11:00 2 0.38 0.24 N/A 0. 1424 0. 1450 130.49 0.00 286.14 5.96 361.28 20.00 124.53 1141.85 23 .79 804.59 0 .49 0 .00 0 .00 11:15 1.9 0.36 0.24 N/A 0.1268 0.1291 116.20 0.00 286. 14 5.96 361. 28 20.00 110.24 1163.18 24.23 890 .60 0 .54 0.00 0 .00 11:30 1. 9 0. 36 0. 23 N/A 0. 1303 0. 1327 119. 41 0. 00 286.14 5. 96 361. 28 20. 00 113.45 1181.39 24 .61 979.43 0 .60 0.00 0.00 11:45 1.7 0.33 0.23 N/A 0.0955 0.0973 87.53 0.00 286. 14 5.96 361. 28 20.00 81.57 1200.19 25 .00 1035 .99 0 .63 0.00 0 .00 12:00 1. 8 0.34 0.23 N/A 0.1180 0.1202 108.19 0.00 286.14 5.96 361.28 20.00 102. 23 1212.17 25.25 1112.97 0.68 0 .00 0 .00 12:15 2. 5 0.48 0.22 N/A 0. 2553 02600 233.96 0.00 286.14 5.96 361.28 20.00 228.00 1228.46 25.59 1315 .38 0 .80 0 .00 0 .00 12:30 2.6 0. 50 0. 22 N/A 0.2777 0.2828 254. 55 0. 00 286.14 5. 96 361. 28 20. 00 248.59 1271.31 26.49 1537.48 0.94 0.00 0.00 12:45 2.8 0. 54 0. 22 N/A 0.3193 0.3251 292. 63 0. 00 286.14 5. 96 361.28 20. 00 286.66 1318.32 27.47 1796.68 1.10 0.00 0 .00
6 of 26
13:00 2.9 0.55 0.21 N/A 0.3416 0 .3479 313.14 0.00 286.14 5.96 361.28 20.00 307.18 1373.19 28.61 2075.25 1 .27 0 .00 0 .00 13:15 3 .4 0.65 0.21 N/A 0 .4405 0 .4486 403.72 0.00 286.14 5.96 361.28 20.00 397.76 1432 .16 29.84 2443.17 1 .49 0 .00 0 .00 13:30 3.4 0 .65 0 .21 N/A 0 .4436 0 .4518 406 .63 0 .00 286.14 5 .96 361 .28 20 .00 400.67 1510.04 31.46 2812 .38 1.72 0.00 0.00 13:45 2.3 0 .44 0 .20 N/A 0.2365 0.2408 216 .74 0 .00 286.14 5 .96 361.28 20 .00 210.77 1588.20 33.09 2990.07 1.83 0.00 0 .00 14:00 2.3 0.44 0.20 N/A 0.2396 0 .2440 219.57 0.00 286.14 5.96 361.28 20.00 213.61 1625.82 33 .87 3169 .81 1.94 0.00 0 .00 14:15 2. 7 0.52 0.20 N/A 0 .3191 0.3250 292.47 0.00 286.14 5.96 361.28 20.00 286.51 1663 .86 34 .66 3421.66 2 .09 0 .00 0 .00 14:30 2. 6 0.50 0.19 N/A 0 .3030 0 .3086 277.71 0.00 286 .14 5.96 361.28 20.00 271.75 1717.18 35 .77 3657.64 2 .24 0 .00 0 .00 14:45 2.6 0.50 0 .19 N/A 0.3060 0.3116 280 .43 0 .00 286.14 5 .96 361.28 20 .00 274.47 1767.13 36.82 3895.29 2.38 0.00 0 .00 15:00 2. 5 0. 48 0 .19 N/A 0.2898 0 .2951 265 .59 0 .00 286.14 5 .96 361 .28 20 .00 259.63 1817.44 37 .86 4117.06 2.52 0.00 0.00 15:15 2.4 0.46 0.19 N/A 0.2735 0.2786 250.70 0.00 286 .14 5.96 361 .28 20.00 244.74 1864.38 38.84 4322 .96 2.64 0.00 0 .00 15:30 2.3 0.44 0.18 N/A 0 .2572 0.2620 235.78 0.00 286 .14 5.96 361.28 20.00 229.82 1907.97 39 .75 4513.02 2.76 0 .00 0 .00 15:45 1. 9 0.36 0.18 N/A 0 .1835 0.1869 168.24 0.00 286.14 5.96 361.28 20.00 162.27 1948 .20 40.59 4634.71 2.83 0 .00 0 .00 16:00 1.9 0. 36 0. 18 N/A 0.1863 0.1897 170 .75 0 .00 286.14 5 .96 361 .28 20 .00 164.79 1973.96 41.12 4758.37 2 .91 0.00 0.00 16:15 0.4 0. 08 0. 17 0.06 0.0153 0.0156 14 .02 0 .00 286.14 5 .96 361.28 20 .00 8.06 2000.14 41.67 4724.76 2.89 0.00 0 .00 16:30 0.4 0.08 0.17 0.06 0.0153 0.0156 14.02 0.00 286 .14 5.96 361.28 20.00 8.06 1993.03 41 .52 4691 .30 2.87 0.00 0.00 16:45 0. 3 0.06 0.17 0.05 0.0115 0 .0117 10.51 0.00 286.14 5.96 361.28 20.00 4.55 1985 .94 41 .37 4654.48 2 .85 0 .00 0 .00 17:00 0. 3 0.06 0.17 0.05 0.0115 0 .0117 10.51 0.00 286.14 5.96 361.28 20.00 4.55 1978.15 41 .21 4617.82 2 .82 0 .00 0 .00 17:15 0.5 0. 10 0. 16 0.08 0.0191 0.0195 17 .52 0 .00 286.14 5 .96 361.28 20 .00 11.56 1970.39 41.05 4588.34 2.80 0.00 0 .00 17:30 0.5 0. 10 0. 16 0.08 0. 0191 0.0195 17 .52 0 .00 286.14 5 .96 361 .28 20 .00 11.56 1964 .15 40 .92 4558.98 2 .79 0.00 0 .00 17:45 0.5 0.10 0.16 0. 08 0.0191 0.0195 17.52 0.00 286 .14 5.96 361 .28 20.00 11.56 1957.93 40.79 4529.75 2.77 0.00 0.00 18:00 0. 4 0.08 0.16 0.06 0. 0153 0.0156 14.02 0.00 286 .14 5.96 361.28 20.00 8.06 1951.74 40.66 4497.15 2.75 0 .00 0.00 18:15 0. 4 0.08 0.15 0.06 0. 0153 0.0156 14.02 0.00 286.14 5.96 361.28 20.00 8.06 1944 .84 40.52 4464.69 2 .73 0 .00 0 .00 18:30 0.4 0. 08 0. 15 0. 06 0.0153 0.0156 14 .02 0 .00 286.14 5 .96 361 .28 20 .00 8.06 1937.97 40.37 4432 .38 2 .71 0.00 0.00 18:45 0.3 0. 06 0. 15 0.05 0.0115 0.0117 10.51 0 .00 286.14 5 .96 361.28 20 .00 4.55 1931.13 40.23 4396.70 2.69 0.00 0 .00 19:00 0.2 0.04 0.15 0.03 0. 0076 0. 0078 7.01 0.00 286.14 5.96 361.28 20.00 1.05 1923 .58 40 .07 4357 .67 2.66 0.00 0.00 19:15 0. 3 0.06 0.15 0.05 0. 0115 0.0117 10.51 0.00 286.14 5.96 361.28 20.00 4.55 1915 .32 39.90 4322 .32 2 .64 0 .00 0 .00 19:30 0. 4 0.08 0.14 0.06 0. 0153 0. 0156 14.02 0.00 286 .14 5.96 361.28 20.00 8.06 1907.83 39 .75 4290.63 2.62 0 .00 0 .00 19:45 0.3 0. 06 0. 14 0.05 0.0115 0.0117 10. 51 0.00 286.14 5 .96 361.28 20 .00 4.55 1901.13 39.61 4255.58 2.60 0.00 0 .00 20:00 0.2 0. 04 0. 14 0.03 0. 0076 0.0078 7. 01 0.00 286.14 5 .96 361 .28 20 .00 1.05 1893.71 39 .45 4217.18 2.58 0.00 0.00 20:15 0.3 0.06 0.14 0. 05 0.0115 0.0117 10.51 0.00 286 .14 5.96 361 .28 20.00 4.55 1885.58 39.28 4182 .45 2.56 0.00 0 .00 20:30 0.3 0.06 0.14 0.05 0.0115 0.0117 10.51 0.00 286.14 5.96 361.28 20.00 4.55 1878 .23 39.13 4147.87 2.54 0 .00 0 .00 20:45 0.3 0.06 0.13 0.05 0. 0115 0.0117 10.51 0.00 286.14 5.96 361.28 20.00 4.55 1870 .91 38 .98 4113.45 2 .51 0 .00 0 .00 21:00 0.2 0. 04 0. 13 0. 03 0.0076 0.0078 7. 01 0. 00 286.14 5 .96 361 .28 20 .00 1.05 1863 .62 38.83 4075.67 2.49 0.00 0.00 21:15 0.3 0. 06 0. 13 0.05 0.0115 0.0117 10. 51 0. 00 286.14 5 .96 361.28 20 .00 4.55 1855.62 38.66 4041.57 2.47 0.00 0 .00 21:30 0. 2 0.04 0.13 0.03 0. 0076 0. 0078 7.01 0.00 286. 14 5.96 361.28 20.00 1.05 1848.40 38 .51 4004.11 2.45 0.00 0 .00 21:45 0.3 0.06 0.13 0.05 0. 0115 0.0117 10.51 0.00 286.14 5.96 361.28 20.00 4 .55 1840 .47 38 .34 3970 .32 2 .43 0 .00 0 .00 22:00 0. 2 0.04 0.13 0.03 0. 0076 0. 0078 7.01 0.00 286. 14 5.96 361.28 20.00 1.05 1833 .32 38 .19 3933.17 2.40 0 .00 0 .00 22:15 0.3 0. 06 0. 13 0.05 0.0115 0.0117 10. 51 0. 00 286.14 5. 96 361.28 20 .00 4.55 1825 .46 38.03 3899.70 2.38 0.00 0 .00 22:30 0. 2 0. 04 0. 13 0.03 0.0076 0. 0078 7. 01 0. 00 286.14 5. 96 361.28 20 .00 1.05 1818 .37 37 .88 3862.86 2.36 0.00 0 .00 22:45 0.2 0.04 0.12 0. 03 0.0076 0.0078 7.01 0.00 286. 14 5.96 361.28 20.00 1.05 1810.57 37.72 3826 .19 2.34 0.00 0 .00 23:00 0.2 0.04 0.12 0.03 0.0076 0. 0078 7.01 0.00 286. 14 5.96 361.28 20.00 1.05 1802.81 37.56 3789.68 2.32 0 .00 0 .00 23:15 0.2 0.04 0.12 0.03 0. 0076 0. 0078 7.01 0.00 286.14 5.96 361.28 20.00 1.05 1795 .08 37 .40 3753 .33 2 .29 0 .00 0 .00 23:30 0.2 0. 04 0. 12 0. 03 0.0076 0.0078 7. 01 0. 00 286.14 5. 96 361. 28 20.00 1.05 1787.39 37.24 3717 .14 2.27 0.00 0.00 23:45 0.2 0. 04 0. 12 0.03 0.0076 0.0078 7. 01 0. 00 286.14 5. 96 361.28 20. 00 1.05 1779.73 37.08 3681.11 2.25 0.00 0 .00 24:00 0.2 0.04 0.12 0.03 0.0076 0.0078 7.01 0.00 286.14 5.96 361.28 20.00 1.05 1772.10 36 .92 3645 .24 2.23 0.00 0 .00 0 0.00 0.12 0.00 0. 0000 0. 0000 0.00 0.00 286.14 5.96 355.32 19.53 0.00 1764 .51 36 .76 3608.48 2 .21 0 .00 0 .00 Total volume (ct) 6835. 82 Total Overflow (cf)
HYDROLOGY CALCULATIONS -
Using the RCFC&WCD Short Cut Unit Hydrograph Method
Area Designations Basin B
Drainage Area (ac.) 1.0900
Unit time (minutes) 5 5 5 15
100 Year Storm Duration (hrs) 1 3 6 24
Total Precipitation (Plates D -4.4,E-5.2, 5.4, 5.6)(in.) 1.76 2.49 3.24 4.78 Or data from NOAA interactive website Soils Group A
AMC index II Runoff Number (plate E-6.1) 32
Plate E-6.2 Pervious Area Loss Rate (Fp)(in/hr) 0.74 (AMC 11) Percentage of Impervious Cover (Ai)(%) (plate E-6.3) 76.96 (See impervious/pervious area calculations included in report) Weighted Average Loss Rate (F=Fp(1-.9Ai))(in./hr.) 0.23 (used for 1, 3, and 6 hour storm, the 24 hour storm uses variable maximum loss rate per plate E-1.1 (3 of 6)) Low Loss Rate Percent (%) 80
Retention Basin Percolation Rate (in/hr) (also used for drywell percolation rate) Percolation is taken incrementally.
Basin volume is calculated using the "truncated pyramid" formula, a more conservative estimate than "averaged end areas" sometimes used (Drywell can be "zeroed our by reducing numbers to less than .001, but should not entered as zeros or program chokes.) Drywell storage includes 40% of the 1' wide rock bed surrounding the drywell: formula (upper)*P10*(diaml2)^2+(lower)*PI()*((diam/2)"2+0.4*((diaml2+(grav+0.4166))"2-(diam12+0.4166)^2)) The drywell wall thickness is assumed at 5" (0.4166) and the gravel bed width is variable "gray" Drywell design factors Upper sec. (ft.)= 5 Lower sec. (ft.). 1 Ring diam. (ft.) = 4 Drywell lower max. (cf)= 298.45 Upper max.(cf)= 62.83 Gravel bed width around drwyell= 1 Drywell total(cf)= 361.28 Ret. Basin design (area, depth) Top = s.f. Bot. = 1164.93 s.f. Max. Depth (d)= 4 Max. storage= 7439.91 (d/3)*(bottom+top+(bottom*top)"0.50) Formulas vol=(h/3)*(bottom+top+(bottom*top)"0.50) area=bottom+(h/d)*(top-bottom) h=(vol*3)/(bottom+top+(bottom*top)^0.5) (values must be non -zero or error occurs) Outside input from:
1 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow % Rain (in/hr Max. Min. Rain (in/hr Rate (cfs) Vol. (cf) Input (cf) Area (sf) Perc. (cf) Vol. (cf) Depth (ft) Basin (cf) Area (sf) Perc. (cf) Vol. (cf) Depth (ft Vol. (cf) Rate (cfs) 0:05 3.7 0.7814 0.2274 N/A 0.5540 0.6089 182.67 0.00 30.89 0.21 182.45 9.17 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0:10 4.8 1.0138 0.2274 N/A 0.7863 0.8642 259.27 0.00 186.93 1.30 361.28 20.00 79.14 1164.93 8.09 71.05 0.04 0.00 0.00 0:15 5.1 1.0771 0.2274 N/A 0.8497 0.9339 280.16 0.00 286.14 1.99 361.28 20.00 278.17 1179.17 8.19 341.03 0.18 0.00 0.00 0:20 4.9 1.0349 0.2274 N/A 0.8074 0.8874 266.23 0.00 286.14 1.99 361.28 20.00 264.24 1233.28 8.56 596.71 0.32 0.00 0.00 0:25 6.6 1.3939 0.2274 N/A 1.1665 1.2821 384.62 0.00 286.14 1.99 361.28 20.00 382.63 1284.52 8.92 970.42 0.52 0.00 0.00 0:30 7.3 1.5418 0.2274 N/A 1.3143 1.4445 433.36 0.00 286.14 1.99 361.28 20.00 431.37 1359.42 9.44 1392.35 0.75 0.00 0.00 0:35 8.4 1.7741 0.2274 N/A 1.5466 1.6999 509.96 0.00 286.14 1.99 361.28 20.00 507.98 1443.98 10.03 1890.30 1.02 0.00 0.00 0:40 9 1.9008 0.2274 N/A 1.6734 1.8392 551.75 0.00 286.14 1.99 361.28 20.00 549.76 1543.78 10.72 2429.34 1.31 0.00 0.00 0:45 12.3 2.5978 0.2274 N/A 2.3703 2.6052 781.55 0.00 286.14 1.99 361.28 20.00 779.56 1651.81 11.47 3197.44 1.72 0.00 0.00 0:50 17.6 3.7171 0.2274 N/A 3.4897 3.8354 1150.63 0.00 286.14 1.99 361.28 20.00 1148.65 1805.75 12.54 4333.54 2.33 0.00 0.00 0:55 16.1 3.4003 0.2274 N/A 3.1729 3.4873 1046.18 0.00 286.14 1.99 361.28 20.00 1044.19 2033.44 14.12 5363.61 2.88 0.00 0.00 1:00 4.2 0.8870 0.2274 N/A 0.6596 0.7249 217.48 0.00 286.14 1.99 361.28 20.00 215.50 2239.88 15.55 5563.55 2.91 0.00 0.00 0 0.0000 0.2274 0.00 0.0000 0.0000 0.00 0.00 286.14 1.99 359.29 19.84 0.00 2279.96 15.83 5547.72 2.98 0.00 0.00 0 0.0000 0.2274 0.00 0.0000 0.0000 0.00 0.00 286.14 1.99 357.31 19.68 0.00 2276.78 15.81 5531.91 2.97 0.00 0.00 1:15 0 0.0000 0.2274 0.00 0.0000 0.0000 0.00 0.00 286.14 1.99 355.32 19.53 0.00 2273.61 15.79 5516.12 2.97 0.00 0.00 Total volume (cf) 6063.85 Total Overflow (cf)
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3 Hour Storm in 5 minute increments Drywell Drywell Drywell Dry well Overflow Basin Basin Basin Time Pattem Storm Loss Rate Value Effective Flo w Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflo w Overflow % Rain (in/hr Max. Min . Rain (in/hr Rate (cfs) Vol. (cf) Input (cf) Area (sf) Perc. (cf, Vol. (cf) Depth (ft) Basin (cf) Area (sf) Perc . (cf) Vol. (cf) Depth (ft Vol. (cf) Rate (cfs) 0:05 1.3 0.39 0.23 N/A 0.1610 0 .1769 53.08 0.00 30 .89 0.21 52.87 2.66 0.00 0.00 0.00 0 .00 0.00 0.00 0 .00 0:10 1. 3 0.39 0.23 N/A 0 .1610 0.1769 53.08 0.00 76.11 0 .53 105.42 5.30 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 0:15 1. 1 0.33 0.23 N/A 0.1012 0 .1113 33.38 0.00 121.06 0.84 137.96 6.93 0.00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 0:20 1.5 0.45 0 .23 N/A 0.2208 0.2426 72.79 0 .00 148.89 1 .03 209 .72 10 .54 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 0:25 1.5 0. 45 0 .23 N/A 0.2208 0 .2426 72 .79 0 .00 210.25 1 .46 281 .04 14 .13 0.00 0 .00 0.00 0.00 0 .00 0.00 0.00 0:30 1.8 0.54 0.23 N/A 0.3104 0.3411 102.34 0.00 271 .26 1.88 361 .28 20.00 20.22 1164.93 8.09 12 .14 0 .01 0.00 0 .00 0:35 1. 5 0.45 0.23 N/A 0 .2208 0.2426 72.79 0.00 286 .14 1.99 361.28 20.00 70.80 1167.36 8 .11 74.83 0.04 0 .00 0 .00 0:40 1. 8 0.54 0.23 N/A 0 .3104 0.3411 102.34 0.00 286.14 1.99 361.28 20.00 100.36 1179 .93 8.19 166.99 0 .09 0 .00 0 .00 0:45 1.8 0. 54 0. 23 N/A 0.3104 0.3411 102 .34 0 .00 286.14 1 .99 361 .28 20 .00 100.36 1198.40 8.32 259.03 0.14 0.00 0.00 0:50 1.5 0. 45 0. 23 N/A 0.2208 0.2426 72.79 0 .00 286.14 1 .99 361.28 20 .00 70.80 1216.84 8 .45 321.38 0 .17 0.00 0 .00 0:55 1. 6 0.48 0.23 N/A 0.2506 0.2755 82.64 0.00 286 .14 1.99 361.28 20.00 80.65 1229 .34 8.54 393.49 0 .21 0.00 0.00 1:00 1. 8 0.54 0.23 N/A 0.3104 0 .3411 102.34 0.00 286.14 1.99 361.28 20.00 100.36 1243 .79 8.64 485 .21 0 .26 0 .00 0 .00 1:05 2. 2 0.66 0.23 N/A 0.4299 0 .4725 141.75 0.00 286.14 1.99 361.28 20.00 139.77 1262.17 8 .77 616.22 0 .33 0 .00 0 .00 1:10 2.2 0. 66 0. 23 N/A 0. 4299 0.4725 141 .75 0 .00 286.14 1.99 361.28 20 .00 139.77 1288 .43 8 .95 747.03 0 .40 0.00 0 .00 1:15 2. 2 0. 66 0. 23 N/A 0.4299 0.4725 141.75 0 .00 286.14 1 .99 361 .28 20 .00 139.77 1314 .65 9 .13 877.67 0.47 0.00 0 .00 1:20 2 0.60 0.23 N/A 0.3702 0.4068 122.05 0.00 286 .14 1.99 361 .28 20.00 120.06 1340.83 9.31 988.42 0.53 0.00 0.00 1:25 2.6 0.78 0.23 N/A 0.5494 0.6039 181.16 0.00 286 .14 1.99 361.28 20.00 179.17 1363 .03 9 .47 1158.13 0.62 0 .00 0.00 1:30 2. 7 0.81 0.23 N/A 0. 5793 0.6367 191.01 0.00 286.14 1.99 361.28 20.00 189 .03 1397 .04 9.70 1337.46 0 .72 0 .00 0 .00 1:35 2.4 0. 72 0. 23 N/A 0. 4897 0.5382 161.46 0 .00 286.14 1 .99 361 .28 20 .00 159.47 1432.98 9.95 1486 .98 0.80 0.00 0.00 1:40 2.7 0. 81 0. 23 N/A 0.5793 0.6367 191.01 0 .00 286.14 1 .99 361.28 20 .00 189.03 1462.94 10.16 1665.84 0 .90 0.00 0 .00 1:45 3. 3 0.99 0.23 N/A 0. 7586 0. 8338 250.13 0.00 286.14 1.99 361.28 20.00 248.14 1498.79 10 .41 1903.58 1.02 0.00 0.00 1:50 3. 1 0.93 0.23 N/A 0. 6988 0.7681 230.42 0.00 286.14 1.99 361.28 20.00 228.44 1546 .44 10 .74 2121 .27 1 .14 0 .00 0 .00 1:55 2. 9 0.87 0.23 N/A 0. 6391 0. 7024 210.72 0.00 286 .14 1.99 361.28 20.00 208 .73 1590 .07 11 .04 2318.96 1 .25 0 .00 0 .00 2:00 3 0. 90 0. 23 N/A 0.6690 0.7352 220. 57 0.00 286.14 1 .99 361.28 20 .00 218.58 1629.69 11.32 2526.23 1.36 0.00 0 .00 2:05 3.1 0. 93 0. 23 N/A 0.6988 0. 7681 230. 42 0.00 286.14 1 .99 361 .28 20 .00 228.44 1671.23 11 .61 2743.06 1.47 0.00 0.00 2:10 4.2 1.25 0.23 N/A 1.0275 1.1293 338.80 0.00 286 .14 1.99 361 .28 20.00 336.81 1714.68 11.91 3067 .96 1.65 0.00 0 .00 2:15 5 1.49 0.23 N/A 1. 2666 1.3920 417.61 0.00 286.14 1.99 361.28 20.00 415.63 1779.80 12.36 3471.23 1 .87 0 .00 0 .00 2:20 3. 5 1.05 0.23 N/A 0. 8184 0.8994 269.83 0.00 286.14 1.99 361.28 20.00 267.84 1860 .62 12 .92 3726.15 2 .00 0 .00 0 .00 2:25 6.8 2. 03 0. 23 N/A 1.8044 1.9832 594. 95 0. 00 286.14 1 .99 361 .28 20 .00 592.97 1911.71 13.28 4305.84 2 .31 0.00 0.00 2:30 7.3 2. 18 0. 23 N/A 1.9538 2.1474 644. 21 0. 00 286.14 1.99 361.28 20 .00 642.23 2027.89 14.08 4933.99 2.65 0.00 0 .00 2:35 8.2 2.45 0.23 N/A 2. 2227 2.4429 732.88 0.00 286. 14 1.99 361.28 20.00 730.90 2153.78 14 .96 5649.93 3.04 0.00 0 .00 2:40 5. 9 1.76 0.23 N/A 1. 5355 1. 6876 506.28 0.00 286.14 1.99 361.28 20.00 504.30 2297 .27 15.95 6138 .27 3 .30 0 .00 0 .00 2:45 2 0.60 0.23 N/A 0. 3702 0. 4068 122.05 0.00 286. 14 1.99 361.28 20.00 120.06 2395.14 16 .63 6241.70 3 .36 0 .00 0 .00 2:50 1.8 0. 54 0. 23 N/A 0.3104 0.3411 102. 34 0. 00 286.14 1.99 361.28 20 .00 100.36 2415.87 16.78 6325.28 3.40 0.00 0 .00 2:55 1.8 0. 54 0. 23 N/A 0. 3104 0. 3411 102. 34 0. 00 286.14 1. 99 361.28 20 .00 100.36 2432 .62 16 .89 0.00 0 .00 3:00 0.6 0.18 0.23 0. 14 0.0359 0.0394 11.82 0.00 286. 14 1.99 361.28 20.00 9.84 2449.35 17.01 6401.57 3.44 0.00 0 .00 0 0.00 0.23 0.00 0. 0000 0. 0000 0.00 0.00 286. 14 1.99 359.29 19.84 0.00 2447.91 17.00 6384.57 3.43 0 .00 0 .00 0 0.00 0.23 0.00 0. 0000 0. 0000 0.00 0.00 286.14 1.99 357.31 19.68 0 .00 2444 .50 16.98 6367.60 3 .42 0 .00 0 .00 3:15 0 0. 00 0. 23 0. 00 0.0000 0.0000 0. 00 0. 00 286.14 1. 99 355. 32 19.53 0.00 2441.10 16.95 6350.64 3.41 0.00 0.00 0 0. 00 0. 23 0.00 0.0000 0.0000 0. 00 0. 00 286.14 1. 99 353.33 19. 37 0.00 2437.70 16.93 6333.71 3.41 0.00 0 .00 0 0.00 0.23 0.00 0.0000 0.0000 0.00 0.00 286.14 1.99 351.35 19.21 0.00 2434 .31 16 .90 6316 .81 3.40 0.00 0.00 3:30 0 0.00 0.23 0.00 0. 0000 0. 0000 0.00 0.00 286.14 1.99 349.36 19.05 0.00 2430 .92 16.88 6299.93 3 .39 0 .00 0 .00 0 0.00 0.23 0.00 0. 0000 0. 0000 0.00 0.00 286. 14 1.99 347.37 18.89 0.00 2427 .54 16 .86 6283.07 3 .38 0.00 0.00 0 0.00 0.23 0. 00 0.0000 0.0000 0.00 0.00 286. 14 1.99 345.38 18.73 0. 00 2424.16 16.83 6266.24 3.37 0.00 0.00 Total volume (cf) 7180.08 Total Overflow (cf) 0.00
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6 Hour Storm in 5 minute increments Dry well Drywell Dry well Drywell Overflow Basin Basin Basin Time Pattem Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflo w Overflow % Rain (in/hr Max. Min . Rain (in/hr Rate (cfs) Vol. (cf) Input (cf) Area (sf) Perc . (cf, Vol . (cf) Depth (ft) Basin (cf) Area (sf) Perc . (cf) Vol. (cf) Depth (ft Vol . (cf) Rate (cfs) 0:05 0.5 0 .19 0 .23 0.16 0.0389 0.0427 12.82 0 .00 30.89 0 .21 12 .61 0 .63 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 0:10 0.6 0.23 0.23 0.19 0.0467 0 .0513 15.38 0.00 41 .67 0.29 27.70 1.39 0.00 0.00 0.00 0 .00 0 .00 0.00 0 .00 0:15 0. 6 0.23 0.23 0.19 0 .0467 0.0513 15.38 0.00 54 .58 0 .38 42.70 2.15 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 0:20 0. 6 0.23 0.23 0.19 0 .0467 0 .0513 15.38 0.00 67.41 0.47 57.62 2.90 0.00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 0:25 0.6 0.23 0 .23 0.19 0.0467 0.0513 15 .38 0 .00 80.17 0.56 72.45 3.64 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 0:30 0.7 0. 27 0 .23 0.22 0.0544 0 .0598 17 .95 0 .00 92.85 0.64 89 .75 4 .51 0.00 0.00 0.00 0.00 0 .00 0.00 0.00 0:35 0.7 0.27 0.23 0 .22 0.0544 0.0598 17.95 0.00 107 .65 0.75 106.95 5.38 0 .00 0.00 0.00 0 .00 0 .00 0.00 0 .00 0:40 0. 7 0.27 0.23 0.22 0 .0544 0.0598 17.95 0.00 122.36 0.85 124.05 6.23 0.00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 0:45 0. 7 0.27 0.23 0.22 0 .0544 0.0598 17.95 0.00 136.98 0.95 141.04 7.09 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 0:50 0.7 0. 27 0. 23 0.22 0.0544 0.0598 17 .95 0 .00 151.52 1.05 157 .94 7 .94 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0:55 0.7 0. 27 0. 23 0.22 0.0544 0.0598 17.95 0 .00 165.97 1 .15 174 .73 8 .78 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 1:00 0.8 0.31 0.23 N/A 0.0836 0 .0919 27.56 0.00 180 .33 1.25 201.04 10.10 0.00 0.00 0.00 0 .00 0.00 0.00 0.00 1:05 0. 8 0.31 0.23 N/A 0.0836 0.0919 27.56 0.00 202.84 1.41 227.20 11.42 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 1:10 0. 8 0.31 0.23 N/A 0.0836 0 .0919 27.56 0.00 225.21 1.56 253.20 12.73 0.00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 1:15 0.8 0. 31 0. 23 N/A 0.0836 0.0919 27 .56 0 .00 247.44 1 .72 279 .04 14 .02 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 1:20 0.8 0. 31 0. 23 N/A 0. 0836 0.0919 27 .56 0 .00 269.55 1 .87 311 .88 16 .07 0.00 0.00 0.00 0.00 0.00 0.00 0 .00 1:25 0.8 0.31 0.23 N/A 0.0836 0.0919 27.56 0.00 286 .14 1.99 337 .46 18.10 0.00 0.00 0.00 0 .00 0.00 0.00 0.00 1:30 0. 8 0.31 0.23 N/A 0.0836 0.0919 27.56 0.00 286 .14 1.99 361.28 20.00 1.75 1164.93 1 .75 0.00 0 .00 0 .00 0.00 1:35 0. 8 0.31 0.23 N/A 0. 0836 0.0919 27.56 0.00 286.14 1.99 361.28 20.00 25.58 1164 .93 8.09 17 .49 0 .01 0 .00 0 .00 1:40 0.8 0. 31 0. 23 N/A 0.0836 0.0919 27 .56 0 .00 286.14 1 .99 361 .28 20 .00 25.58 1168.43 8.11 34 .95 0.02 0.00 0.00 1:45 0.8 0. 31 0. 23 N/A 0.0836 0.0919 27.56 0 .00 286.14 1 .99 361.28 20 .00 25.58 1171.93 8 .14 52.39 0 .03 0.00 0 .00 1:50 0.8 0.31 0.23 N/A 0. 0836 0. 0919 27.56 0.00 286.14 1.99 361.28 20.00 25.58 1175.43 8.16 69.80 0.04 0.00 0.00 1:55 0. 8 0.31 0.23 N/A 0. 0836 0.0919 27.56 0.00 286.14 1.99 361.28 20.00 25 .58 1178 .92 8.19 87.19 0 .05 0 .00 0 .00 2:00 0. 9 0.35 0.23 N/A 0. 1225 0. 1346 40.38 0.00 286 .14 1.99 361.28 20.00 38.40 1182.40 8 .21 117.37 0 .06 0 .00 0 .00 2:05 0.8 0. 31 0. 23 N/A 0.0836 0.0919 27. 56 0.00 286.14 1 .99 361.28 20 .00 25.58 1188 .45 8 .25 134.69 0 .07 0.00 0 .00 2:10 0.9 0. 35 0. 23 N/A 0.1225 0. 1346 40. 38 0.00 286.14 1 .99 361 .28 20 .00 38.40 1191 .92 8.28 164.81 0 .09 0.00 0.00 2:15 0.9 0.35 0.23 N/A 0.1225 0.1346 40.38 0.00 286 .14 1.99 361 .28 20.00 38.40 1197.96 8.32 194 .89 0 .10 0.00 0 .00 2:20 0. 9 0.35 0.23 N/A 0.1225 0.1346 40.38 0.00 286.14 1.99 361.28 20.00 38.40 1203.99 8 .36 224.92 0 .12 0 .00 0 .00 2:25 0. 9 0.35 0.23 N/A 0.1225 0. 1346 40.38 0.00 286.14 1.99 361.28 20.00 38.40 1210 .01 8.40 254.92 0 .14 0 .00 0 .00 2:30 0.9 0. 35 0. 23 N/A 0.1225 0.1346 40. 38 0. 00 286.14 1 .99 361 .28 20 .00 38.40 1216.02 8.44 284.87 0.15 0.00 0.00 2:35 0.9 0. 35 0. 23 N/A 0.1225 0.1346 40. 38 0. 00 286.14 1.99 361.28 20 .00 38.40 1222.02 8 .49 314.78 0 .17 0.00 0 .00 2:40 0.9 0.35 0.23 N/A 0. 1225 0. 1346 40.38 0.00 286. 14 1.99 361.28 20.00 38.40 1228.02 8.53 344 .64 0 .19 0.00 0 .00 2:45 1 0.39 0.23 N/A 0. 1614 0.1773 53.20 0.00 286.14 1.99 361.28 20.00 51.22 1234 .00 8.57 387.29 0 .21 0 .00 0 .00 2:50 1 0.39 0.23 N/A 0.1614 0. 1773 53.20 0.00 286. 14 1.99 361.28 20.00 51.22 1242 .55 8 .63 429.88 0 .23 0 .00 0 .00 2:55 1 0. 39 0. 23 N/A 0.1614 0.1773 53. 20 0. 00 286.14 1.99 361.28 20 .00 51.22 1251.08 8 .69 472.40 0 .25 0.00 0 .00 3:00 1 0. 39 0. 23 N/A 0.1614 0. 1773 53. 20 0. 00 286.14 1. 99 361.28 20 .00 51.22 1259 .61 8.75 514.87 0 .28 0.00 0 .00 3:05 1 0.39 0.23 N/A 0.1614 0.1773 53.20 0.00 286. 14 1.99 361.28 20.00 51.22 1268.12 8.81 557.28 0 .30 0.00 0 .00 3:10 1. 1 0.43 0.23 N/A 0. 2002 0.2201 66.02 0.00 286. 14 1.99 361.28 20.00 64.03 1276.62 8 .87 612.45 0.33 0 .00 0 .00 3:15 1. 1 0.43 0.23 N/A 0. 2002 0.2201 66.02 0.00 286.14 1.99 361.28 20.00 64.03 1287 .67 8.94 667 .54 0 .36 0 .00 0 .00 3:20 1.1 0. 43 0. 23 N/A 0.2002 0.2201 66. 02 0. 00 286.14 1. 99 361. 28 20.00 64.03 1298.72 9.02 722.56 0.39 0.00 0.00 3:25 1.2 0. 47 0. 23 N/A 0.2391 0.2628 78. 84 0. 00 286.14 1. 99 361.28 20. 00 76.85 1309.74 9.10 790.32 0 .42 0.00 0 .00 3:30 1.3 0.51 0.23 N/A 0.2780 0. 3055 91.66 0.00 286.14 1.99 361.28 20.00 89.67 1323 .32 9 .19 870 .80 0.47 0.00 0.00 3:35 1. 4 0.54 0.23 N/A 0. 3169 0.3483 104.48 0.00 286.14 1.99 361.28 20.00 102.49 1339 .45 9.30 963.99 0 .52 0 .00 0 .00 3:40 1. 4 0.54 0.23 N/A 0. 3169 0. 3483 104.48 0.00 286.14 1.99 361.28 20.00 102.49 1358.13 9 .43 1057.06 0 .57 0 .00 0 .00 3:45 1.5 0.58 0.23 N/A 0.3558 0.3910 117.30 0.00 286. 14 1.99 361. 28 20.00 115. 31 1376.78 9.56 1162 .81 0 .63 0.00 0 .00 3:50 1.5 0. 58 0. 23 N/A 0. 3558 0. 3910 117. 30 0. 00 286.14 1. 99 361. 28 20. 00 115.31 1397.98 9.71 1268.41 0 .68 0.00 0.00 3:55 1.6 0.62 0.23 N/A 0.3946 0.4337 130.12 0.00 286. 14 1.99 361. 28 20.00 128.13 1419.14 9.86 1386 .69 0 .75 0.00 0 .00 4:00 1. 6 0.62 0.23 N/A 0.3946 0.4337 130.12 0.00 286.14 1.99 361.28 20.00 128. 13 1442.85 10.02 1504.81 0 .81 0 .00 0 .00 4:05 1. 7 0.66 0.23 N/A 0.4335 0.4765 142.94 0.00 286.14 1.99 361.28 20.00 140.95 1466. 52 10.18 1635 .58 0 .88 0 .00 0 .00 4:10 1.8 0. 70 0. 23 N/A 0.4724 0.5192 155. 76 0. 00 286.14 1. 99 361. 28 20. 00 153.77 1492.73 10.37 1778 .98 0.96 0.00 0.00 4:15 1.9 0. 74 0. 23 N/A 0.5113 0.5619 168. 58 0. 00 286.14 1.99 361.28 20. 00 166.59 1521.47 10.57 1935.01 1.04 0.00 0 .00
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4:20 2 0.78 0.23 N/A 0.5502 0 .6047 181.40 0.00 286.14 1.99 361.28 20.00 179.41 1552.74 10.78 2103.64 1 .13 0 .00 0 .00 4:25 2 .1 0.82 0.23 N/A 0 .5890 0 .6474 194.22 0.00 286.14 1.99 361.28 20.00 192.23 1586 .53 11 .02 2284.85 1 .23 0 .00 0 .00 4:30 2.1 0 .82 0 .23 N/A 0.5890 0.6474 194 .22 0 .00 286.14 1 .99 361 .28 20 .00 192.23 1622 .85 11.27 2465.82 1.33 0.00 0.00 4:35 2.2 0 .86 0 .23 N/A 0.6279 0.6901 207 .04 0 .00 286.14 1.99 361.28 20 .00 205.05 1659.12 11.52 2659.35 1.43 0.00 0 .00 4:40 2.3 0.89 0.23 N/A 0 .6668 0 .7329 219.86 0.00 286.14 1.99 361.28 20.00 217.87 1697 .91 11 .79 2865.43 1.54 0.00 0 .00 4:45 2. 4 0.93 0.23 N/A 0 .7057 0.7756 232.68 0.00 286.14 1.99 361.28 20.00 230.69 1739 .21 12 .08 3084.04 1 .66 0 .00 0 .00 4:50 2. 4 0.93 0.23 N/A 0.7057 0 .7756 232.68 0.00 286 .14 1.99 361.28 20.00 230.69 1783 .02 12 .38 3302.35 1 .78 0 .00 0 .00 4:55 2.5 0.97 0 .23 N/A 0.7446 0.8183 245 .50 0 .00 286.14 1 .99 361.28 20 .00 243.51 1826.77 12.69 3533.17 1.90 0.00 0 .00 5:00 2. 6 1. 01 0 .23 N/A 0 .7834 0 .8611 258 .32 0 .00 286.14 1 .99 361 .28 20 .00 256.33 1873.04 13 .01 3776.50 2.03 0.00 0.00 5:05 3.1 1.21 0.23 N/A 0 .9778 1.0747 322.42 0.00 286 .14 1.99 361 .28 20.00 320.43 1921.80 13.35 4083.58 2.20 0.00 0 .00 5:10 3.6 1.40 0.23 N/A 1.1722 1 .2884 386.51 0.00 286 .14 1.99 361.28 20.00 384.53 1983.35 13.77 4454.33 2 .39 0 .00 0 .00 5:15 3. 9 1.52 0.23 N/A 1 .2889 1 .4166 424.97 0.00 286.14 1.99 361.28 20.00 422.99 2057 .65 14 .29 4863.03 2 .61 0 .00 0 .00 5:20 4.2 1. 63 0. 23 N/A 1.4055 1.5448 463 .43 0 .00 286.14 1 .99 361 .28 20 .00 461.45 2139.56 14.86 5309.62 2.85 0.00 0.00 5:25 4.7 1. 83 0. 23 N/A 1.5999 1.7584 527 .53 0 .00 286.14 1 .99 361.28 20 .00 525.54 2229.06 15.48 5819.68 3 .13 0.00 0 .00 5:30 5.6 2.18 0.23 N/A 1.9498 2 .1430 642.91 0.00 286 .14 1.99 361.28 20.00 640.92 2331.29 16 .19 6444.42 3.46 0.00 0.00 5:35 1. 9 0.74 0.23 N/A 0.5113 0 .5619 168.58 0.00 286.14 1.99 361.28 20.00 166.59 2456 .50 17 .06 6593.95 3 .55 0 .00 0 .00 5:40 0. 9 0.35 0.23 N/A 0.1225 0 .1346 40.38 0.00 286.14 1.99 361.28 20.00 38.40 2486.46 17 .27 6615.08 3 .56 0 .00 0 .00 5:45 0.6 0. 23 0. 23 0.19 0.0467 0.0513 15 .38 0 .00 286.14 1.99 361.28 20 .00 13.40 2490.70 17.30 0.00 0 .00 5:50 0.5 0. 19 0. 23 0.16 0.0389 0.0427 12 .82 0 .00 286.14 1 .99 361 .28 20 .00 10.83 2489.92 17 .29 6604.72 3 .55 0.00 0 .00 5:55 0.3 0.12 0.23 0. 09 0.0233 0.0256 7.69 0.00 286 .14 1.99 361 .28 20.00 5.70 2488.62 17.28 6593 .14 3.54 0.00 0.00 6:00 0. 2 0.08 0.23 0.06 0. 0156 0.0171 5.13 0.00 286 .14 1.99 361.28 20.00 3.14 2486.30 17.27 6579.02 3.54 0 .00 0.00 0 0.00 0.23 0.00 0. 0000 0.0000 0.00 0.00 286.14 1.99 359.29 19.84 0 .00 2483.47 17 .25 6561 .77 3 .53 0 .00 0 .00 0 0. 00 0. 23 0. 00 0.0000 0.0000 0 .00 0 .00 286.14 1 .99 357 .31 19.68 0.00 2480.02 17.22 6544 .55 3.52 0.00 0.00 6:15 0 0. 00 0. 23 0.00 0.0000 0.0000 0.00 0 .00 286.14 1 .99 355.32 19 .53 0 .00 2476.56 17.20 6527.35 3 .51 0.00 0 .00 0 0.00 0.23 0.00 0.0000 0.0000 0.00 0.00 286.14 1.99 353.33 19.37 0.00 2473.12 17 .17 6510.18 3.50 0.00 0.00 0 0.00 0.23 0.00 0. 0000 0. 0000 0.00 0.00 286.14 1.99 351.35 19.21 0 .00 2469 .68 17 .15 6493.03 3 .49 0 .00 0 .00 6:30 0 0.00 0.23 0.00 0. 0000 0. 0000 0.00 0.00 286 .14 1.99 349.36 19.05 0.00 2466 .24 17 .13 6475.90 3 .48 0 .00 0 .00 0 0. 00 0. 23 0.00 0.0000 0.0000 0. 00 0.00 286.14 1 .99 347 .37 18 .89 0 .00 2462.81 17.10 6458.80 3.47 0.00 0 .00 0 0. 00 0. 23 0.00 0.0000 0.0000 0. 00 0.00 286.14 1 .99 345 .38 18 .73 0.00 2459 .38 17 .08 6441.72 3.46 0.00 0.00 6:45 0 0.00 0.23 0. 00 0.0000 0.0000 0.00 0.00 286 .14 1.99 343 .40 18.58 0 .00 2455.95 17.06 6424.66 3.45 0.00 0 .00 0 0.00 0.23 0.00 0. 0000 0. 0000 0.00 0.00 286.14 1.99 341.41 18.42 0.00 2452.54 17.03 6407.63 3 .45 0 .00 0 .00 0 0.00 0.23 0.00 0. 0000 0. 0000 0.00 0.00 286.14 1.99 339.42 18.26 0 .00 2449 .12 17 .01 6390.62 3 .44 0 .00 0 .00 7:00 0 0. 00 0. 23 0. 00 0.0000 0.0000 0. 00 0. 00 286.14 1 .99 337 .44 18 .10 0.00 2445 .71 16.98 6373.64 3.43 0.00 0.00 Total volume (cf) 7652. 75 Total Overflow (cf)
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24 Hour Storm in 15 minute increments Dry well Drywell Dry well Drywell Overflow Basin Basin Basin Time Pattem Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflo w Overflow % Rain (in/hr Max. Min. Rain (in/hr Rate (cfs) Vol. (cf) Input (cf) Area (sf) Perc . (cf, Vol . (cf) Depth (ft) Basin (cf) Area (sf) Perc . (cf) Vol. (cf) Depth (ft Vol . (cf) Rate (cfs) 0:15 0.2 0 .04 0 .40 0.03 0.0076 0.0084 7 .57 0 .00 30.89 0 .64 6 .92 0 .35 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 0:30 0.3 0.06 0.39 0.05 0 .0115 0 .0126 11.35 0.00 36.81 0.77 17.50 0.88 0.00 0.00 0.00 0 .00 0 .00 0.00 0 .00 0:45 0. 3 0.06 0.39 0.05 0 .0115 0.0126 11.35 0.00 45.86 0.96 27.89 1.40 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 1:00 0. 4 0.08 0.39 0.06 0 .0153 0 .0168 15.13 0.00 54.75 1.14 41.88 2.11 0.00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 1:15 0.3 0.06 0 .38 0.05 0.0115 0.0126 11 .35 0 .00 66.71 1.39 51 .84 2 .61 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 1:30 0.3 0. 06 0 .38 0.05 0 .0115 0 .0126 11 .35 0 .00 75.23 1 .57 61 .62 3 .10 0.00 0.00 0.00 0.00 0 .00 0.00 0.00 1:45 0.3 0.06 0.37 0 .05 0.0115 0.0126 11.35 0.00 83 .60 1.74 71.23 3.58 0 .00 0.00 0.00 0 .00 0 .00 0.00 0 .00 2:00 0. 4 0.08 0.37 0.06 0.0153 0.0168 15.13 0.00 91.81 1.91 84.45 4.24 0.00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 2:15 0. 4 0.08 0.36 0.06 0 .0153 0.0168 15.13 0.00 103.12 2.15 97.43 4.90 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 2:30 0.4 0. 08 0. 36 0.06 0.0153 0.0168 15 .13 0 .00 114.22 2 .38 110 .18 5 .54 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2:45 0.5 0. 10 0. 35 0.08 0.0191 0.0210 18.91 0 .00 125.12 2 .61 126.49 6 .36 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 3:00 0.5 0.10 0.35 0.08 0.0191 0 .0210 18.91 0.00 139 .07 2.90 142.50 7.16 0.00 0.00 0.00 0 .00 0.00 0.00 0.00 3:15 0. 5 0.10 0.35 0.08 0.0191 0.0210 18.91 0.00 152.77 3.18 158.23 7.95 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 3:30 0. 5 0.10 0.34 0.08 0.0191 0 .0210 18.91 0.00 166 .22 3.46 173.68 8.73 0.00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 3:45 0.5 0. 10 0. 34 0.08 0.0191 0.0210 18.91 0 .00 179.44 3 .74 188.86 9 .49 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 4:00 0.6 0. 11 0. 33 0.09 0. 0229 0.0252 22 .70 0 .00 192.41 4.01 207 .54 10 .43 0.00 0.00 0.00 0.00 0.00 0.00 0 .00 4:15 0.6 0.11 0.33 0. 09 0.0229 0.0252 22.70 0.00 208 .40 4.34 225.90 11.35 0.00 0.00 0.00 0 .00 0.00 0.00 0.00 4:30 0. 7 0.13 0.32 0.11 0.0268 0.0294 26.48 0.00 224.09 4.67 247.71 12.45 0.00 0 .00 0 .00 0.00 0 .00 0 .00 0.00 4:45 0. 7 0.13 0.32 0.11 0. 0268 0.0294 26.48 0.00 242.75 5.06 269.13 13.53 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 5:00 0.8 0. 15 0. 32 0. 12 0.0306 0.0336 30 .26 0 .00 261.07 5 .44 293 .95 14 .77 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5:15 0.6 0. 11 0. 31 0.09 0.0229 0.0252 22.70 0 .00 282.30 5 .88 312.42 16 .11 0 .00 0.00 0.00 0.00 0 .00 0.00 0 .00 5:30 0.7 0.13 0.31 0.11 0. 0268 0. 0294 26.48 0.00 286.14 5.96 332.94 17.74 0.00 0 .00 0.00 0 .00 0 .00 0.00 0.00 5:45 0. 8 0.15 0.30 0.12 0. 0306 0.0336 30.26 0.00 286.14 5.96 357.24 19.68 0 .00 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 6:00 0. 8 0.15 0.30 0.12 0. 0306 0. 0336 30.26 0.00 286 .14 5.96 361.28 20.00 20.26 1164.93 20 .26 0.00 0 .00 0 .00 0 .00 6:15 0.9 0. 17 0. 30 0.14 0.0344 0.0378 34. 04 0.00 286.14 5 .96 361.28 20 .00 28.08 1164.93 24.27 3.81 0 .00 0.00 0 .00 6:30 0.9 0. 17 0. 29 0.14 0. 0344 0. 0378 34. 04 0.00 286.14 5 .96 361 .28 20 .00 28.08 1165 .69 24 .29 7.61 0.00 0.00 0.00 6:45 1 0.19 0.29 0. 15 0.0382 0.0420 37.83 0.00 286 .14 5.96 361 .28 20.00 31.86 1166 .46 24.30 15 .17 0 .01 0.00 0 .00 7:00 1 0.19 0.28 0.15 0.0382 0.0420 37.83 0.00 286.14 5.96 361.28 20.00 31.86 1167.97 24.33 22.71 0.01 0 .00 0 .00 7:15 1 0.19 0.28 0.15 0. 0382 0. 0420 37.83 0.00 286.14 5.96 361.28 20.00 31.86 1169.48 24 .36 30.21 0 .02 0 .00 0 .00 7:30 1.1 0. 21 0. 28 0. 17 0.0421 0.0462 41. 61 0. 00 286.14 5 .96 361 .28 20 .00 35.65 1170.98 24.40 41.46 0.02 0.00 0.00 7:45 1.2 0. 23 0. 27 0.18 0.0459 0.0504 45. 39 0. 00 286.14 5 .96 361.28 20 .00 39.43 1173.24 24.44 56.45 0 .03 0.00 0 .00 8:00 1. 3 0.25 0.27 0.20 0.0497 0.0546 49.17 0.00 286. 14 5.96 361.28 20.00 43.21 1176.24 24 .51 75.15 0.04 0.00 0 .00 8:15 1. 5 0.29 0.26 0.23 0. 0574 0.0630 56.74 0.00 286.14 5.96 361.28 20.00 50.78 1179 .99 24 .58 101 .35 0 .05 0 .00 0 .00 8:30 1. 5 0.29 0.26 0.23 0. 0574 0. 0630 56.74 0.00 286. 14 5.96 361.28 20.00 50.78 1185 .24 24 .69 127.43 0 .07 0 .00 0 .00 8:45 1.6 0. 31 0. 26 0.24 0.0612 0.0672 60. 52 0. 00 286.14 5. 96 361.28 20 .00 54.56 1190 .47 24.80 157.19 0 .08 0.00 0 .00 9:00 1.7 0. 33 0. 25 N/A 0. 0712 0. 0783 70. 46 0. 00 286.14 5. 96 361.28 20 .00 64.50 1196.43 24 .93 196.76 0.11 0.00 0 .00 9:15 1.9 0.36 0.25 N/A 0.1131 0.1243 111.85 0.00 286. 14 5.96 361.28 20.00 105.89 1204.36 25 .09 277.56 0 .15 0.00 0 .00 9:30 2 0.38 0.25 N/A 0.1358 0.1492 134.29 0.00 286. 14 5.96 361.28 20.00 128 .33 1220.56 25.43 380.46 0.20 0 .00 0 .00 9:45 2. 1 0.40 0.24 N/A 0. 1584 0.1741 156.70 0.00 286.14 5.96 361.28 20.00 150.74 1241 .18 25 .86 505 .34 0 .27 0 .00 0 .00 10:00 2.2 0. 42 0. 24 N/A 0.1810 0.1990 179. 08 0. 00 286.14 5. 96 361. 28 20.00 173.12 1266.21 26.38 652.08 0.35 0.00 0.00 10:15 1.5 0. 29 0. 24 0.23 0.0574 0.0630 56. 74 0. 00 286.14 5. 96 361.28 20. 00 50.78 1295.62 26.99 675.87 0 .36 0.00 0 .00 10:30 1.5 0.29 0.23 0. 23 0. 0574 0. 0630 56.74 0.00 286.14 5.96 361.28 20.00 50.78 1300 .38 27 .09 699 .55 0 .38 0.00 0.00 10:45 2 0.38 0.23 N/A 0. 1531 0.1683 151.44 0.00 286.14 5.96 361.28 20.00 145.48 1305 .13 27 .19 817.84 0 .44 0 .00 0 .00 11:00 2 0.38 0.23 N/A 0.1565 0. 1720 154.76 0.00 286.14 5.96 361.28 20.00 148. 80 1328.84 27 .68 938.96 0 .50 0 .00 0 .00 11:15 1.9 0.36 0.22 N/A 0.1407 0.1546 139.14 0.00 286. 14 5.96 361. 28 20.00 133.18 1353.11 28.19 1043 .95 0 .56 0.00 0 .00 11:30 1. 9 0. 36 0. 22 N/A 0.1440 0. 1582 142. 40 0. 00 286.14 5. 96 361. 28 20. 00 136.44 1374.15 28 .63 1151.76 0 .62 0.00 0.00 11:45 1.7 0.33 0.22 N/A 0.1090 0.1198 107.79 0.00 286. 14 5.96 361. 28 20.00 101.83 1395.76 29.08 1224 .51 0 .66 0.00 0 .00 12:00 1. 8 0.34 0.21 N/A 0.1313 0.1443 129.89 0.00 286.14 5.96 361.28 20.00 123.93 1410.34 29.38 1319.06 0.71 0 .00 0 .00 12:15 2. 5 0.48 0.21 N/A 0. 2683 0.2949 265.43 0.00 286.14 5.96 361.28 20.00 259.47 1429. 29 29.78 1548 .75 0 .83 0 .00 0 .00 12:30 2.6 0. 50 0. 21 N/A 0.2906 0.3194 287. 45 0. 00 286.14 5. 96 361. 28 20. 00 281.49 1475.32 30.74 1799.50 0.97 0.00 0.00 12:45 2.8 0. 54 0. 20 N/A 0.3319 0.3648 328. 35 0. 00 286.14 5. 96 361.28 20. 00 322.39 1525.58 31.78 2090.11 1.12 0.00 0 .00
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13:00 2.9 0.55 0.20 N/A 0.3541 0 .3892 350.30 0.00 286.14 5.96 361.28 20.00 344.34 1583.82 33.00 2401.46 1 .29 0 .00 0 .00 13:15 3 .4 0.65 0.20 N/A 0.4528 0 .4976 447.87 0.00 286.14 5.96 361.28 20.00 441.91 1646 .22 34 .30 2809.07 1 .51 0 .00 0 .00 13:30 3.4 0 .65 0 .19 N/A 0 .4558 0 .5009 450 .83 0 .00 286.14 5 .96 361 .28 20 .00 444.87 1727.91 36.00 3217 .94 1.73 0.00 0.00 13:45 2.3 0 .44 0 .19 N/A 0.2484 0.2730 245 .71 0 .00 286.14 5 .96 361.28 20 .00 239.75 1809.86 37.71 3419.98 1.84 0.00 0 .00 14:00 2.3 0.44 0.19 N/A 0.2513 0 .2762 248.59 0.00 286.14 5.96 361.28 20.00 242.63 1850 .35 38 .55 3624 .07 1.95 0.00 0 .00 14:15 2. 7 0.52 0.19 N/A 0 .3307 0 .3634 327.09 0.00 286.14 5.96 361.28 20.00 321.13 1891 .25 39 .40 3905.79 2 .10 0 .00 0 .00 14:30 2. 6 0.50 0.18 N/A 0 .3144 0 .3455 310.98 0.00 286 .14 5.96 361.28 20.00 305.02 1947.71 40 .58 4170.24 2.24 0 .00 0 .00 14:45 2.6 0.50 0 .18 N/A 0.3172 0.3486 313 .75 0 .00 286.14 5 .96 361.28 20 .00 307.78 2000.71 41.68 4436.34 2.39 0.00 0 .00 15:00 2. 5 0. 48 0 .18 N/A 0 .3008 0 .3306 297 .56 0 .00 286.14 5 .96 361 .28 20 .00 291.59 2054.04 42 .79 4685.14 2 .52 0.00 0.00 15:15 2.4 0.46 0.17 N/A 0.2844 0.3126 281.33 0.00 286 .14 5.96 361 .28 20.00 275.36 2103.91 43.83 4916 .67 2.64 0.00 0 .00 15:30 2.3 0.44 0.17 N/A 0 .2680 0.2945 265.05 0.00 286 .14 5.96 361.28 20.00 259.09 2150.31 44 .80 5130.97 2.76 0 .00 0 .00 15:45 1. 9 0.36 0.17 N/A 0 .1941 0.2133 192.00 0.00 286.14 5.96 361.28 20.00 186.04 2193 .26 45.69 5271.31 2.83 0 .00 0 .00 16:00 1.9 0. 36 0. 17 N/A 0 .1967 0.2162 194 .55 0 .00 286.14 5 .96 361 .28 20 .00 188.59 2221.39 46.28 5413.62 2 .91 0.00 0.00 16:15 0.4 0. 08 0. 16 0.06 0.0153 0.0168 15 .13 0 .00 286.14 5 .96 361.28 20 .00 9.17 2249.91 46.87 5375.92 2.89 0.00 0 .00 16:30 0.4 0.08 0.16 0.06 0.0153 0 .0168 15.13 0.00 286 .14 5.96 361.28 20.00 9.17 2242 .35 46 .72 5338.37 2.87 0.00 0.00 16:45 0. 3 0.06 0.16 0.05 0.0115 0.0126 11.35 0.00 286.14 5.96 361.28 20.00 5.39 2234 .83 46.56 5297 .20 2 .85 0 .00 0 .00 17:00 0. 3 0.06 0.16 0.05 0.0115 0 .0126 11.35 0.00 286.14 5.96 361.28 20.00 5.39 2226 .58 46 .39 5256.20 2 .83 0 .00 0 .00 17:15 0.5 0. 10 0. 15 0.08 0.0191 0.0210 18.91 0 .00 286.14 5 .96 361.28 20 .00 12.95 2218.36 46.22 5222.94 2.81 0.00 0 .00 17:30 0.5 0. 10 0. 15 0.08 0. 0191 0.0210 18 .91 0 .00 286.14 5 .96 361 .28 20 .00 12.95 2211.69 46 .08 5189.81 2 .79 0.00 0 .00 17:45 0.5 0.10 0.15 0. 08 0.0191 0.0210 18.91 0.00 286 .14 5.96 361 .28 20.00 12.95 2205.05 45.94 5156 .82 2.77 0.00 0.00 18:00 0. 4 0.08 0.15 0.06 0. 0153 0.0168 15.13 0.00 286 .14 5.96 361.28 20.00 9.17 2198.44 45.80 5120.19 2.75 0 .00 0.00 18:15 0. 4 0.08 0.15 0.06 0. 0153 0.0168 15.13 0.00 286.14 5.96 361.28 20.00 9.17 2191 .10 45.65 5083 .71 2 .73 0 .00 0 .00 18:30 0.4 0. 08 0. 14 0. 06 0.0153 0.0168 15 .13 0 .00 286.14 5 .96 361 .28 20 .00 9.17 2183.79 45.50 5047 .39 2 .71 0.00 0.00 18:45 0.3 0. 06 0. 14 0.05 0.0115 0.0126 11.35 0 .00 286.14 5 .96 361.28 20 .00 5.39 2176.51 45 .34 5007.43 2.69 0.00 0 .00 19:00 0.2 0.04 0.14 0.03 0. 0076 0. 0084 7.57 0.00 286.14 5.96 361.28 20.00 1.60 2168 .50 45 .18 4963 .86 2.67 0.00 0.00 19:15 0. 3 0.06 0.14 0.05 0. 0115 0.0126 11.35 0.00 286.14 5.96 361.28 20.00 5.39 2159 .77 45 .00 4924 .25 2 .65 0 .00 0 .00 19:30 0. 4 0.08 0.14 0.06 0. 0153 0. 0168 15.13 0.00 286 .14 5.96 361.28 20.00 9.17 2151.83 44 .83 4888.59 2 .63 0 .00 0 .00 19:45 0.3 0. 06 0. 13 0.05 0.0115 0.0126 11. 35 0.00 286.14 5 .96 361.28 20 .00 5.39 2144.68 44.68 4849.29 2.61 0.00 0 .00 20:00 0.2 0. 04 0. 13 0.03 0. 0076 0. 0084 7. 57 0.00 286.14 5 .96 361 .28 20 .00 1.60 2136 .81 44 .52 4806.38 2.58 0.00 0.00 20:15 0.3 0.06 0.13 0. 05 0.0115 0.0126 11.35 0.00 286 .14 5.96 361 .28 20.00 5.39 2128.21 44.34 4767 .43 2.56 0.00 0 .00 20:30 0.3 0.06 0.13 0.05 0.0115 0.0126 11.35 0.00 286.14 5.96 361.28 20.00 5.39 2120.40 44.18 4728.64 2 .54 0 .00 0 .00 20:45 0.3 0.06 0.13 0.05 0. 0115 0.0126 11.35 0.00 286.14 5.96 361.28 20.00 5.39 2112 .63 44 .01 4690.01 2 .52 0 .00 0 .00 21:00 0.2 0. 04 0. 13 0. 03 0.0076 0.0084 7. 57 0. 00 286.14 5 .96 361 .28 20 .00 1.60 2104 .89 43.85 4647.77 2 .50 0.00 0.00 21:15 0.3 0. 06 0. 12 0.05 0.0115 0.0126 11. 35 0. 00 286.14 5 .96 361.28 20 .00 5.39 2096.42 43.68 4609.48 2.48 0.00 0 .00 21:30 0. 2 0.04 0.12 0.03 0. 0076 0. 0084 7.57 0.00 286. 14 5.96 361.28 20.00 1.60 2088.74 43.52 4567 .56 2.46 0.00 0 .00 21:45 0.3 0.06 0.12 0.05 0. 0115 0.0126 11.35 0.00 286.14 5.96 361.28 20.00 5 .39 2080 .34 43 .34 4529.61 2 .44 0 .00 0 .00 22:00 0. 2 0.04 0.12 0.03 0. 0076 0. 0084 7.57 0.00 286. 14 5.96 361.28 20.00 1.60 2072.74 43 .18 4488.03 2.41 0 .00 0 .00 22:15 0.3 0. 06 0. 12 0.05 0.0115 0.0126 11. 35 0. 00 286.14 5. 96 361.28 20 .00 5 .39 2064 .40 43.01 4450.41 2.39 0.00 0 .00 22:30 0. 2 0. 04 0. 12 0.03 0.0076 0. 0084 7. 57 0. 00 286.14 5. 96 361.28 20 .00 1.60 2056 .86 42 .85 4409.16 2.37 0.00 0 .00 22:45 0.2 0.04 0.12 0. 03 0.0076 0.0084 7.57 0.00 286. 14 5.96 361.28 20.00 1.60 2048.60 42.68 4368 .09 2.35 0.00 0 .00 23:00 0.2 0.04 0.12 0.03 0.0076 0.0084 7.57 0.00 286. 14 5.96 361.28 20.00 1.60 2040.37 42.51 4327.18 2 .33 0 .00 0 .00 23:15 0.2 0.04 0.12 0.03 0. 0076 0. 0084 7.57 0.00 286.14 5.96 361.28 20.00 1.60 2032 .17 42 .34 4286.45 2 .30 0 .00 0 .00 23:30 0.2 0. 04 0. 11 0. 03 0.0076 0.0084 7. 57 0. 00 286.14 5. 96 361. 28 20.00 1.60 2024.00 42.17 4245.89 2.28 0.00 0.00 23:45 0.2 0. 04 0. 11 0.03 0.0076 0.0084 7. 57 0. 00 286.14 5. 96 361.28 20. 00 1.60 2015.88 42.00 4205.49 2.26 0.00 0 .00 24:00 0.2 0.04 0.11 0.03 0.0076 0.0084 7.57 0.00 286.14 5.96 361.28 20.00 1.60 2007.78 41 .83 4165 .27 2.24 0.00 0 .00 0 0.00 0.11 0.00 0. 0000 0. 0000 0.00 0.00 286.14 5.96 355.32 19.53 0.00 1999 .72 41 .66 4123.61 2 .22 0 .00 0 .00 Total volume (cf) 7710.69 Total Overflow (cf)
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HYDROLOGY CALCULATIONS -
Using the RCFC&WCD Short Cut Unit Hydrograph Method
Area Designations Basin C
Drainage Area (ac.) 1.7500
Unit time (minutes) 5 5 5 15
100 Year Storm Duration (hrs) 1 3 6 24
Total Precipitation (Plates D -4.4,E-5.2, 5.4, 5.6)(in.) 1.76 2.49 3.24 4.78 Or data from NOAA interactive website Soils Group A
AMC index II Runoff Number (plate E-6.1) 32
Plate E-6.2 Pervious Area Loss Rate (Fp)(in/hr) 0.74 (AMC 11) Percentage of Impervious Cover (Ai)(%) (plate E-6.3) 83.11 (See impervious/pervious area calculations included in report) Weighted Average Loss Rate (F=Fp(1-.9Ai))(in./hr.) 0.19 (used for 1, 3, and 6 hour storm, the 24 hour storm uses variable maximum loss rate per plate E-1.1 (3 of 6)) Low Loss Rate Percent (%) 80
Retention Basin Percolation Rate (in/hr) (also used for drywell percolation rate) Percolation is taken incrementally.
Basin volume is calculated using the "truncated pyramid" formula, a more conservative estimate than "averaged end areas" sometimes used (Drywell can be "zeroed our by reducing numbers to less than .001, but should not entered as zeros or program chokes.) Drywell storage includes 40% of the 1' wide rock bed surrounding the drywell: formula (upper)*P10*(diaml2)"2+(lower)*PI()*((diam/2)"2+0.4*((diaml2+(grav+0.4166))"2-(diam12+0.4166)^2)) The drywell wall thickness is assumed at 5" (0.4166) and the gravel bed width is variable "gray" Drywell design factors Upper sec. (ft.)= 0.001 Lower sec. (ft.). tai Ring diam. (ft.) = 0.001 Drywell lower max. (cf)= 0.00 Upper max.(cf)= 0.00 Gravel bed width around drwyell= 1 Drywell total(cf)= 0.00 Ret. Basin design (area, depth) Top = s.f. Bot. = 1651.99 s.f. Max. Depth (d)= 5 Max. storage= 13071.17 (d/3)*(bottom+top+(bottom*top)"0.50) Formulas vol=(h/3)*(bottom+top+(bottom*top)"0.50) area=bottom+(h/d)*(top-bottom) h=(vol*3)/(bottom+top+(bottom*top)^0.5) (values must be non -zero or error occurs) Outside input from:
1 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow % Rain (in/hr Max. Min. Rain (in/hr Rate (cfs) Vol. (cf) Input (cf) Area (sf) Perc. (cf) Vol. (cf) Depth (ft) Basin (cf) Area (sf) Perc. (cf) Vol. (cf) Depth (ft Vol. (cf) Rate (cfs) 0:05 3.7 0.7814 0.1865 N/A 0.5950 1.0498 314.95 0.00 0.00 0.00 0.00 0.00 314.95 1651.99 11.47 303.48 0.12 0.00 0.00 0:10 4.8 1.0138 0.1865 N/A 0.8273 1.4598 437.94 0.00 0.00 0.00 0.00 0.00 437.94 1699.86 11.80 729.61 0.28 0.00 0.00 0:15 5.1 1.0771 0.1865 N/A 0.8906 1.5716 471.48 0.00 0.00 0.00 0.00 0.00 471.48 1767.08 12.27 1188.82 0.45 0.00 0.00 0:20 4.9 1.0349 0.1865 N/A 0.8484 1.4971 449.12 0.00 0.00 0.00 0.00 0.00 449.12 1839.51 12.77 1625.16 0.62 0.00 0.00 0:25 6.6 1.3939 0.1865 N/A 1.2074 2.1306 639.18 0.00 0.00 0.00 0.00 0.00 639.18 1908.34 13.25 2251.09 0.86 0.00 0.00 0:30 7.3 1.5418 0.1865 N/A 1.3553 2.3915 717.45 0.00 0.00 0.00 0.00 0.00 717.45 2007.07 13.94 2954.60 1.13 0.00 0.00 0:35 8.4 1.7741 0.1865 N/A 1.5876 2.8014 840.43 0.00 0.00 0.00 0.00 0.00 840.43 2118.04 14.71 3780.33 1.45 0.00 0.00 0:40 9 1.9008 0.1865 N/A 1.7143 3.0250 907.51 0.00 0.00 0.00 0.00 0.00 907.51 2248.29 15.61 4672.23 1.79 0.00 0.00 0:45 12.3 2.5978 0.1865 N/A 2.4113 4.2549 1276.47 0.00 0.00 0.00 0.00 0.00 1276.47 2388.97 16.59 5932.11 2.27 0.00 0.00 0:50 17.6 3.7171 0.1865 N/A 3.5306 6.2301 1869.03 0.00 0.00 0.00 0.00 0.00 1869.03 2587.70 17.97 7783.16 2.98 0.00 0.00 0:55 16.1 3.4003 0.1865 N/A 3.2138 5.6711 1701.32 0.00 0.00 0.00 0.00 0.00 1701.32 2879.68 20.00 9464.49 3.62 0.00 0.00 1:00 4.2 0.8870 0.1865 N/A 0.7006 1.2362 370.86 0.00 0.00 0.00 0.00 0.00 370.86 3144.88 21.84 9813.50 3.71 0.00 0.00 0 0.0000 0.1865 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3199.94 22.22 9791.28 3.75 0.00 0.00 0 0.0000 0.1865 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3196.43 22.20 9769.09 3.74 0.00 0.00 1:15 0 0.0000 0.1865 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3192.93 22.17 9746.91 3.73 0.00 0.00 Total volume (cf) 9995.74 Total Overflow (cf)
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3 Hour Storm in 5 minute increments Drywell Drywell Drywell Dry well Overflow Basin Basin Basin Time Pattem Storm Loss Rate Value Effective Flo w Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflo w Overflow % Rain (in/hr Max. Min . Rain (in/hr Rate (cfs) Vol. (cf) Input (cf) Area (sf) Perc. (cf, Vol. (cf) Depth (ft) Basin (cf) Area (sf) Perc . (cf) Vol. (cf) Depth (ft Vol. (cf) Rate (cfs) 0:05 1.3 0.39 0.19 N/A 0.2020 0 .3564 106.91 0.00 0 .00 0.00 0.00 0.00 106.91 1651 .99 11 .47 95 .43 0.04 0.00 0 .00 0:10 1. 3 0.39 0.19 N/A 0 .2020 0.3564 106.91 0.00 0.00 0.00 0.00 0.00 106.91 1667 .04 11 .58 190.77 0 .07 0 .00 0 .00 0:15 1. 1 0.33 0.19 N/A 0.1422 0 .2509 75.27 0.00 0.00 0.00 0.00 0.00 75.27 1682 .08 11 .68 254.36 0 .10 0 .00 0 .00 0:20 1.5 0.45 0 .19 N/A 0.2617 0.4618 138 .54 0 .00 0.00 0 .00 0 .00 0 .00 138.54 1692.11 11.75 381.15 0 .15 0.00 0 .00 0:25 1.5 0. 45 0 .19 N/A 0.2617 0 .4618 138 .54 0 .00 0.00 0.00 0 .00 0.00 138.54 1712.11 11 .89 507.81 0 .19 0.00 0.00 0:30 1.8 0.54 0.19 N/A 0.3514 0.6200 186.00 0.00 0 .00 0.00 0.00 0.00 186.00 1732.09 12.03 681 .77 0 .26 0.00 0 .00 0:35 1. 5 0.45 0.19 N/A 0 .2617 0.4618 138.54 0.00 0.00 0.00 0.00 0.00 138 .54 1759.53 12.22 808.10 0.31 0 .00 0 .00 0:40 1. 8 0.54 0.19 N/A 0 .3514 0.6200 186.00 0.00 0.00 0.00 0.00 0.00 186.00 1779.46 12 .36 981.74 0 .38 0 .00 0 .00 0:45 1.8 0. 54 0. 19 N/A 0.3514 0.6200 186 .00 0 .00 0.00 0.00 0 .00 0.00 186.00 1806 .85 12.55 1155 .19 0.44 0.00 0.00 0:50 1.5 0. 45 0. 19 N/A 0.2617 0.4618 138 .54 0 .00 0.00 0 .00 0 .00 0 .00 138.54 1834.21 12.74 1281.00 0 .49 0.00 0 .00 0:55 1. 6 0.48 0.19 N/A 0.2916 0 .5145 154.36 0.00 0 .00 0.00 0.00 0.00 154.36 1854.05 12 .88 1422.48 0.54 0.00 0.00 1:00 1. 8 0.54 0.19 N/A 0.3514 0.6200 186.00 0.00 0.00 0.00 0.00 0.00 186.00 1876 .37 13 .03 1595.45 0 .61 0 .00 0 .00 1:05 2. 2 0.66 0.19 N/A 0.4709 0 .8309 249.27 0.00 0.00 0.00 0.00 0.00 249.27 1903.65 13 .22 1831.50 0 .70 0 .00 0 .00 1:10 2.2 0. 66 0. 19 N/A 0. 4709 0.8309 249 .27 0 .00 0.00 0 .00 0 .00 0 .00 249 .27 1940.88 13.48 2067.29 0 .79 0.00 0 .00 1:15 2. 2 0. 66 0. 19 N/A 0.4709 0.8309 249 .27 0 .00 0.00 0.00 0 .00 0.00 249.27 1978.08 13 .74 2302.82 0.88 0.00 0 .00 1:20 2 0.60 0.19 N/A 0. 4111 0.7254 217.63 0.00 0 .00 0.00 0.00 0.00 217.63 2015.23 13.99 2506 .46 0.96 0.00 0.00 1:25 2.6 0.78 0.19 N/A 0.5904 1.0418 312.54 0.00 0.00 0.00 0.00 0.00 312 .54 2047.35 14.22 2804.78 1.07 0 .00 0.00 1:30 2. 7 0.81 0.19 N/A 0. 6203 1. 0945 328.36 0.00 0.00 0.00 0.00 0.00 328.36 2094.41 14.54 3118.59 1 .19 0 .00 0 .00 1:35 2.4 0. 72 0. 19 N/A 0.5306 0.9363 280.90 0 .00 0.00 0.00 0 .00 0.00 280.90 2143.91 14.89 3384.61 1 .29 0.00 0.00 1:40 2.7 0. 81 0. 19 N/A 0.6203 1.0945 328.36 0 .00 0.00 0 .00 0 .00 0 .00 328.36 2185.87 15.18 3697.78 1.41 0.00 0 .00 1:45 3. 3 0.99 0.19 N/A 0.7996 1.4109 423.26 0.00 0 .00 0.00 0.00 0.00 423.26 2235.27 15 .52 4105.52 1.57 0.00 0.00 1:50 3. 1 0.93 0.19 N/A 0. 7398 1. 3054 391.63 0.00 0.00 0.00 0.00 0.00 391.63 2299 .58 15.97 4481.18 1 .71 0 .00 0 .00 1:55 2. 9 0.87 0.19 N/A 0. 6800 1. 2000 359.99 0.00 0.00 0.00 0.00 0.00 359.99 2358.84 16 .38 4824.79 1 .85 0 .00 0 .00 2:00 3 0. 90 0. 19 N/A 0.7099 1.2527 375. 81 0.00 0.00 0 .00 0 .00 0 .00 375.81 2413.04 16.76 5183.85 1.98 0.00 0 .00 2:05 3.1 0. 93 0. 19 N/A 0.7398 1.3054 391. 63 0.00 0.00 0.00 0 .00 0.00 391.63 2469 .67 17 .15 5558.32 2 .13 0.00 0.00 2:10 4.2 1.25 0.19 N/A 1.0685 1.8854 565.62 0.00 0 .00 0.00 0.00 0.00 565.62 2528.74 17.56 6106.39 2.34 0.00 0 .00 2:15 5 1.49 0.19 N/A 1.3075 2.3072 692.16 0.00 0.00 0.00 0.00 0.00 692 .16 2615.19 18.16 6780.39 2 .59 0 .00 0 .00 2:20 3. 5 1.05 0.19 N/A 0. 8593 1. 5163 454.90 0.00 0.00 0.00 0.00 0.00 454.90 2721 .50 18.90 7216 .39 2 .76 0 .00 0 .00 2:25 6.8 2. 03 0. 19 N/A 1.8454 3.2563 976. 88 0. 00 0.00 0.00 0 .00 0.00 976.88 2790.28 19.38 8173 .90 3.13 0.00 0.00 2:30 7.3 2. 18 0. 19 N/A 1.9948 3.5199 1055.97 0. 00 0.00 0 .00 0 .00 0 .00 1055.97 2941.31 20.43 9209.44 3 .52 0.00 0 .00 2:35 8.2 2.45 0.19 N/A 2. 2637 3.9944 1198. 33 0.00 0. 00 0.00 0.00 0.00 1198.33 3104.65 21 .56 10386 .21 3 .97 0.00 0 .00 2:40 5. 9 1.76 0.19 N/A 1. 5764 2. 7817 834.52 0.00 0.00 0.00 0.00 0.00 834.52 3290 .27 22 .85 11197.89 4 .28 0 .00 0 .00 2:45 2 0.60 0.19 N/A 0.4111 0. 7254 217.63 0.00 0.00 0.00 0.00 0.00 217.63 3418 .31 23 .74 11391.78 4 .36 0 .00 0 .00 2:50 1.8 0. 54 0. 19 N/A 0.3514 0.6200 186. 00 0. 00 0.00 0. 00 0.00 0 .00 186.00 3448.89 23.95 11553.83 4 .42 0.00 0 .00 2:55 1.8 0. 54 0. 19 N/A 0. 3514 0. 6200 186. 00 0. 00 0.00 0.00 0.00 0.00 186.00 3474.45 24 .13 IMI1110 4.48 0.00 0 .00 3:00 0.6 0.18 0.19 0. 14 0.0359 0.0633 18.98 0.00 0. 00 0.00 0.00 0.00 18.98 3499.98 24.31 11710.37 4.48 0.00 0 .00 0 0.00 0.19 0.00 0. 0000 0. 0000 0.00 0.00 0.00 0.00 0.00 0.00 0 .00 3499.14 24.30 11686.07 4.47 0 .00 0 .00 0 0.00 0.19 0.00 0. 0000 0. 0000 0.00 0.00 0.00 0.00 0.00 0.00 0 .00 3495 .31 24 .27 11661.80 4.46 0 .00 0 .00 3:15 0 0. 00 0. 19 0. 00 0.0000 0.0000 0. 00 0. 00 0.00 0.00 0. 00 0.00 0.00 3491 .48 24.25 11637.56 4 .45 0.00 0.00 0 0. 00 0. 19 0.00 0.0000 0.0000 0. 00 0. 00 0.00 0. 00 0. 00 0. 00 0.00 3487.66 24.22 11613.34 4 .44 0.00 0 .00 0 0.00 0.19 0.00 0.0000 0.0000 0.00 0.00 0. 00 0.00 0.00 0.00 0.00 3483.84 24 .19 11589.14 4.43 0.00 0.00 3:30 0 0.00 0.19 0.00 0. 0000 0. 0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3480 .02 24 .17 11564.98 4.42 0 .00 0 .00 0 0.00 0.19 0.00 0. 0000 0. 0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3476 .21 24 .14 11540.84 4.41 0.00 0.00 0 0.00 0.19 0. 00 0.0000 0.0000 0.00 0.00 0. 00 0.00 0.00 0.00 0. 00 3472.40 24.11 11516.72 4.41 0.00 0.00 Total volume (cf) 12286. 54 Total Overflow (ct) 0.00
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6 Hour Storm in 5 minute increments Dry well Drywell Dry well Drywell Overflow Basin Basin Basin Time Pattem Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflo w Overflow % Rain (in/hr Max. Min . Rain (in/hr Rate (cfs) Vol. (cf) Input (cf) Area (sf) Perc . (cf, Vol . (cf) Depth (ft) Basin (cf) Area (sf) Perc . (cf) Vol. (cf) Depth (ft Vol . (cf) Rate (cfs) 0:05 0.5 0 .19 0 .19 0.16 0.0389 0.0686 20 .58 0 .00 0.00 0 .00 0 .00 0 .00 20.58 1651.99 11.47 9 .11 0 .00 0.00 0 .00 0:10 0.6 0.23 0.19 N/A 0.0468 0 .0826 24.77 0.00 0 .00 0.00 0.00 0.00 24.77 1653.43 11 .48 22.40 0 .01 0.00 0 .00 0:15 0. 6 0.23 0.19 N/A 0 .0468 0.0826 24.77 0.00 0.00 0.00 0.00 0.00 24.77 1655 .52 11 .50 35.67 0 .01 0 .00 0 .00 0:20 0. 6 0.23 0.19 N/A 0 .0468 0 .0826 24.77 0.00 0.00 0.00 0.00 0.00 24.77 1657 .62 11 .51 48.93 0 .02 0 .00 0 .00 0:25 0.6 0.23 0 .19 N/A 0.0468 0.0826 24 .77 0 .00 0.00 0 .00 0 .00 0 .00 24.77 1659.71 11.53 62.18 0 .02 0.00 0 .00 0:30 0.7 0. 27 0 .19 N/A 0.0857 0 .1512 45 .35 0 .00 0.00 0.00 0 .00 0 .00 45.35 1661 .80 11 .54 95.99 0.04 0.00 0.00 0:35 0.7 0.27 0.19 N/A 0.0857 0.1512 45.35 0.00 0 .00 0.00 0.00 0.00 45.35 1667.13 11.58 129 .76 0 .05 0.00 0 .00 0:40 0. 7 0.27 0.19 N/A 0 .0857 0.1512 45.35 0.00 0.00 0.00 0.00 0.00 45.35 1672.46 11.61 163.50 0 .06 0 .00 0 .00 0:45 0. 7 0.27 0.19 N/A 0 .0857 0.1512 45.35 0.00 0.00 0.00 0.00 0.00 45.35 1677 .78 11 .65 197 .20 0 .08 0 .00 0 .00 0:50 0.7 0. 27 0. 19 N/A 0.0857 0.1512 45 .35 0 .00 0.00 0.00 0 .00 0 .00 45.35 1683.10 11.69 230.87 0.09 0.00 0.00 0:55 0.7 0. 27 0. 19 N/A 0.0857 0.1512 45 .35 0 .00 0.00 0 .00 0 .00 0 .00 45.35 1688.41 11.73 264.50 0 .10 0.00 0 .00 1:00 0.8 0.31 0.19 N/A 0.1246 0 .2198 65.94 0.00 0 .00 0.00 0.00 0.00 65.94 1693.71 11 .76 318 .67 0.12 0.00 0.00 1:05 0. 8 0.31 0.19 N/A 0.1246 0.2198 65.94 0.00 0.00 0.00 0.00 0.00 65.94 1702 .26 11 .82 372.78 0 .14 0 .00 0 .00 1:10 0. 8 0.31 0.19 N/A 0.1246 0 .2198 65.94 0.00 0.00 0.00 0.00 0.00 65.94 1710.79 11 .88 426.84 0 .16 0 .00 0 .00 1:15 0.8 0. 31 0. 19 N/A 0.1246 0.2198 65.94 0 .00 0.00 0 .00 0 .00 0 .00 65.94 1719.32 11.94 480.83 0 ,18 0.00 0 .00 1:20 0.8 0. 31 0. 19 N/A 0.1246 0.2198 65 .94 0 .00 0.00 0.00 0 .00 0.00 65.94 1727 .83 12 .00 534.77 0 .20 0.00 0 .00 1:25 0.8 0.31 0.19 N/A 0.1246 0.2198 65.94 0.00 0 .00 0.00 0.00 0.00 65.94 1736.34 12.06 588 .65 0.23 0.00 0.00 1:30 0. 8 0.31 0.19 N/A 0.1246 0.2198 65.94 0.00 0.00 0.00 0.00 0.00 65.94 1744.84 12.12 642.46 0.25 0 .00 0.00 1:35 0. 8 0.31 0.19 N/A 0. 1246 0.2198 65.94 0.00 0.00 0.00 0.00 0.00 65.94 1753 .33 12 .18 696 .22 0 .27 0 .00 0 .00 1:40 0.8 0. 31 0. 19 N/A 0.1246 0.2198 65 .94 0 .00 0.00 0.00 0 .00 0.00 65.94 1761 .81 1223 749 .92 0.29 0.00 0.00 1:45 0.8 0. 31 0. 19 N/A 0.1246 0.2198 65.94 0 .00 0.00 0 .00 0 .00 0 .00 65.94 1770.28 12.29 803.57 0 .31 0.00 0 .00 1:50 0.8 0.31 0.19 N/A 0. 1246 0. 2198 65.94 0.00 0 .00 0.00 0.00 0.00 65.94 1778.74 12 .35 857.15 0 .33 0.00 0.00 1:55 0. 8 0.31 0.19 N/A 0. 1246 0.2198 65.94 0.00 0.00 0.00 0.00 0.00 65.94 1787 .19 12 .41 910.67 0 .35 0 .00 0 .00 2:00 0. 9 0.35 0.19 N/A 0.1634 0. 2884 86.52 0.00 0.00 0.00 0.00 0.00 86.52 1795.64 12 .47 984.72 0 .38 0 .00 0 .00 2:05 0.8 0. 31 0. 19 N/A 0.1246 0.2198 65.94 0.00 0.00 0 .00 0 .00 0 .00 65.94 1807.32 12.55 1038.10 0 .40 0.00 0 .00 2:10 0.9 0. 35 0. 19 N/A 0.1634 0. 2884 86. 52 0.00 0.00 0.00 0 .00 0 .00 86.52 1815 .74 12 .61 1112.01 0.43 0.00 0.00 2:15 0.9 0.35 0.19 N/A 0.1634 0.2884 86.52 0.00 0 .00 0.00 0.00 0.00 86.52 1827.39 12.69 1185 .84 0 .45 0.00 0 .00 2:20 0. 9 0.35 0.19 N/A 0.1634 0.2884 86.52 0.00 0.00 0.00 0.00 0.00 86.52 1839 .04 12.77 1259.58 0.48 0 .00 0 .00 2:25 0. 9 0.35 0.19 N/A 0. 1634 0.2884 86.52 0.00 0.00 0.00 0.00 0.00 86.52 1850 .67 12 .85 1333 .25 0 .51 0 .00 0 .00 2:30 0.9 0. 35 0. 19 N/A 0. 1634 0.2884 86. 52 0. 00 0.00 0.00 0 .00 0.00 86.52 1862.29 12.93 1406.83 0.54 0.00 0.00 2:35 0.9 0. 35 0. 19 N/A 0.1634 0.2884 86. 52 0. 00 0.00 0 .00 0 .00 0 .00 86.52 1873.90 13.01 1480.34 0 .57 0.00 0 .00 2:40 0.9 0.35 0.19 N/A 0.1634 0. 2884 86.52 0.00 0. 00 0.00 0.00 0.00 86.52 1885.49 13 .09 1553 .76 0 .59 0.00 0 .00 2:45 1 0.39 0.19 N/A 0. 2023 0.3570 107.10 0.00 0.00 0.00 0.00 0.00 107.10 1897 .07 13 .17 1647.69 0 .63 0 .00 0 .00 2:50 1 0.39 0.19 N/A 0. 2023 0. 3570 107.10 0.00 0.00 0.00 0.00 0.00 107.10 1911.89 13 .28 1741.51 0 .67 0 .00 0 .00 2:55 1 0. 39 0. 19 N/A 0.2023 0.3570 107. 10 0. 00 0.00 0. 00 0.00 0 .00 107.10 1926.69 13.38 1835.23 0 .70 0.00 0 .00 3:00 1 0. 39 0. 19 N/A 0.2023 0. 3570 107. 10 0. 00 0.00 0.00 0.00 0.00 107.10 1941.47 13 .48 1928.85 0 .74 0.00 0 .00 3:05 1 0.39 0.19 N/A 0.2023 0.3570 107.10 0.00 0. 00 0.00 0.00 0.00 107.10 1956.24 13.58 2022.36 0 .77 0.00 0 .00 3:10 1. 1 0.43 0.19 N/A 0. 2412 0.4256 127.68 0.00 0.00 0.00 0.00 0.00 127.68 1970.99 13.69 2136.35 0.82 0 .00 0 .00 3:15 1. 1 0.43 0.19 N/A 0.2412 0. 4256 127.68 0.00 0.00 0.00 0.00 0.00 127.68 1988 .97 13 .81 2250 .22 0 .86 0 .00 0 .00 3:20 1.1 0. 43 0. 19 N/A 0.2412 0.4256 127. 68 0. 00 0.00 0.00 0. 00 0.00 127.68 2006.93 13.94 2363 .97 0.90 0.00 0.00 3:25 1.2 0. 47 0. 19 N/A 0.2801 0.4942 148. 26 0. 00 0.00 0. 00 0. 00 0. 00 148.26 2024.87 14.06 2498.17 0 .96 0.00 0 .00 3:30 1.3 0.51 0.19 N/A 0. 3190 0. 5628 168.85 0.00 0. 00 0.00 0.00 0.00 168.85 2046.04 14 .21 2652 .81 1.01 0.00 0.00 3:35 1. 4 0.54 0.19 N/A 0. 3578 0. 6314 189.43 0.00 0.00 0.00 0.00 0.00 189.43 2070 .43 14 .38 2827.86 1 .08 0 .00 0 .00 3:40 1. 4 0.54 0.19 N/A 0. 3578 0. 6314 189.43 0.00 0.00 0.00 0.00 0.00 189.43 2098 .05 14 .57 3002.71 1 .15 0 .00 0 .00 3:45 1.5 0.58 0.19 N/A 0.3967 0.7000 210.01 0.00 0. 00 0.00 0.00 0.00 210.01 2125.63 14.76 3197 .96 1.22 0.00 0 .00 3:50 1.5 0. 58 0. 19 N/A 0. 3967 0. 7000 210. 01 0. 00 0.00 0.00 0. 00 0.00 210.01 2156.43 14 .98 3393.00 1.30 0.00 0.00 3:55 1.6 0.62 0.19 N/A 0. 4356 0.7686 230.59 0.00 0. 00 0.00 0.00 0.00 230.59 2187.19 15 .19 3608 .40 1.38 0.00 0 .00 4:00 1. 6 0.62 0.19 N/A 0.4356 0.7686 230.59 0.00 0.00 0.00 0.00 0.00 230.59 2221.17 15.42 3823.57 1.46 0 .00 0 .00 4:05 1. 7 0.66 0.19 N/A 0.4745 0.8372 251.17 0.00 0.00 0.00 0.00 0.00 251.17 2255. 11 15.66 4059.08 1 .55 0 .00 0 .00 4:10 1.8 0. 70 0. 19 N/A 0.5134 0.9059 271. 76 0. 00 0.00 0.00 0. 00 0. 00 271.76 2292.25 15.92 4314 .92 1.65 0.00 0.00 4:15 1.9 0. 74 0. 19 N/A 0.5522 0.9745 292. 34 0. 00 0.00 0. 00 0. 00 0. 00 292.34 2332.61 16.20 4591.06 1.76 0.00 0 .00
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4:20 2 0.78 0.19 N/A 0.5911 1 .0431 312.92 0.00 0.00 0.00 0.00 0.00 312 .92 2376.17 16.50 4887.48 1 .87 0 .00 0 .00 4:25 2 .1 0.82 0.19 N/A 0 .6300 1 .1117 333.50 0.00 0.00 0.00 0.00 0.00 333.50 2422 .92 16.83 5204.15 1 .99 0 .00 0 .00 4:30 2.1 0 .82 0 .19 N/A 0.6300 1.1117 333 .50 0 .00 0.00 0.00 0 .00 0.00 333.50 2472 .87 17.17 5520.48 2 .11 0.00 0.00 4:35 2.2 0 .86 0 .19 N/A 0.6689 1.1803 354 .08 0 .00 0.00 0 .00 0 .00 0 .00 354.08 2522.77 17.52 5857.05 2.24 0.00 0 .00 4:40 2.3 0.89 0.19 N/A 0 .7078 1.2489 374.67 0.00 0 .00 0.00 0.00 0.00 374.67 2575.86 17 .89 6213 .83 2.38 0.00 0 .00 4:45 2. 4 0.93 0.19 N/A 0 .7466 1 .3175 395.25 0.00 0.00 0.00 0.00 0.00 395.25 2632 .14 18 .28 6590.80 2 .52 0 .00 0 .00 4:50 2. 4 0.93 0.19 N/A 0.7466 1 .3175 395.25 0.00 0.00 0.00 0.00 0.00 395.25 2691.60 18 .69 6967.35 2 .67 0 .00 0 .00 4:55 2.5 0.97 0 .19 N/A 0.7855 1.3861 415 .83 0 .00 0.00 0 .00 0 .00 0 .00 415.83 2751.00 19.10 7364.08 2.82 0.00 0 .00 5:00 2. 6 1. 01 0 .19 N/A 0.8244 1.4547 436 .41 0 .00 0.00 0.00 0 .00 0.00 436.41 2813 .57 19 .54 7780.95 2 .98 0.00 0.00 5:05 3.1 1.21 0.19 N/A 1.0188 1.7977 539.32 0.00 0 .00 0.00 0.00 0.00 539.32 2879.33 20.00 8300.28 3.18 0.00 0 .00 5:10 3.6 1.40 0.19 N/A 1.2132 2.1408 642.23 0.00 0.00 0.00 0.00 0.00 642 .23 2961 .25 20.56 8921.95 3 .41 0 .00 0 .00 5:15 3. 9 1.52 0.19 N/A 1 .3298 2 .3466 703.98 0.00 0.00 0.00 0.00 0.00 703 .98 3059 .31 21 .25 9604.69 3 .67 0 .00 0 .00 5:20 4.2 1. 63 0. 19 N/A 1.4465 2.5524 765 .73 0 .00 0.00 0.00 0 .00 0.00 765.73 3167.00 21.99 10348 .42 3.96 0.00 0.00 5:25 4.7 1. 83 0. 19 N/A 1.6409 2.8955 868 .64 0 .00 0.00 0 .00 0 .00 0 .00 868.64 3284.31 22.81 11194 .25 4.28 0.00 0 .00 5:30 5.6 2.18 0.19 N/A 1.9908 3.5129 1053 .88 0.00 0 .00 0.00 0.00 0.00 1053.88 3417.73 23 .73 12224 .39 4.68 0.00 0.00 5:35 1. 9 0.74 0.19 N/A 0.5522 0 .9745 292.34 0.00 0.00 0.00 0.00 0.00 292.34 3580 .22 24 .86 12491.87 4 .78 0 .00 0 .00 5:40 0. 9 0.35 0.19 N/A 0.1634 0 .2884 86.52 0.00 0.00 0.00 0.00 0.00 86.52 3622.41 25.16 12553.23 4.80 0 .00 0 .00 5:45 0.6 0. 23 0. 19 N/A 0.0468 0.0826 24 .77 0 .00 0.00 0 .00 0 .00 0 .00 24.77 3632.09 25.22 12552 .77 4 .80 0.00 0 .00 5:50 0.5 0. 19 0. 19 0.16 0.0389 0.0686 20 .58 0 .00 0.00 0.00 0 .00 0.00 20.58 3632 .02 25 .22 12548.13 4 .80 0.00 0 .00 5:55 0.3 0.12 0.19 0. 09 0.0233 0.0412 12.35 0.00 0 .00 0.00 0.00 0.00 12.35 3631.29 25.22 12535 .27 4.80 0.00 0.00 6:00 0. 2 0.08 0.19 0.06 0. 0156 0.0274 8.23 0.00 0.00 0.00 0.00 0.00 8.23 3629 .26 25.20 12518.30 4.79 0 .00 0.00 0 0.00 0.19 0.00 0. 0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0 .00 3626 .58 25 .18 12493.11 4 .78 0 .00 0 .00 0 0. 00 0. 19 0. 00 0.0000 0.0000 0 .00 0 .00 0.00 0.00 0 .00 0.00 0.00 3622 .61 25.16 12467 .95 4.77 0.00 0.00 6:15 0 0. 00 0. 19 0.00 0.0000 0.0000 0.00 0 .00 0.00 0 .00 0 .00 0 .00 0 .00 3618.64 25 .13 12442.83 4.76 0.00 0 .00 0 0.00 0.19 0.00 0.0000 0.0000 0.00 0.00 0 .00 0.00 0.00 0.00 0.00 3614.68 25 .10 12417.72 4.75 0.00 0.00 0 0.00 0.19 0.00 0. 0000 0. 0000 0.00 0.00 0.00 0.00 0.00 0.00 0 .00 3610 .72 25 .07 12392.65 4.74 0 .00 0 .00 6:30 0 0.00 0.19 0.00 0. 0000 0. 0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3606.76 25 .05 12367.60 4.73 0 .00 0 .00 0 0. 00 0. 19 0.00 0.0000 0.0000 0. 00 0.00 0.00 0 .00 0 .00 0 .00 0 .00 3602.81 25.02 12342.58 4 .72 0.00 0 .00 0 0. 00 0. 19 0.00 0.0000 0.0000 0. 00 0.00 0.00 0.00 0 .00 0 .00 0.00 3598 .87 24 .99 12317.59 4 .71 0.00 0.00 6:45 0 0.00 0.19 0. 00 0.0000 0.0000 0.00 0.00 0 .00 0.00 0.00 0.00 0 .00 3594.92 24.96 12292 .63 4.70 0.00 0 .00 0 0.00 0.19 0.00 0. 0000 0. 0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3590.99 24.94 12267.69 4.69 0 .00 0 .00 0 0.00 0.19 0.00 0. 0000 0. 0000 0.00 0.00 0.00 0.00 0.00 0.00 0 .00 3587 .05 24 .91 12242 .78 4.68 0 .00 0 .00 7:00 0 0. 00 0. 19 0. 00 0.0000 0.0000 0. 00 0. 00 0.00 0.00 0 .00 0.00 0.00 3583 .12 24.88 12217 .90 4 .67 0.00 0.00 Total volume (cf) 13622. 03 Total Overflow (cf)
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24 Hour Storm in 15 minute increments Dry well Drywell Dry well Drywell Overflow Basin Basin Basin Time Pattem Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflo w Overflow % Rain (in/hr Max. Min. Rain (in/hr Rate (cfs) Vol. (cf) Input (cf) Area (sf) Perc . (cf, Vol . (cf) Depth (ft) Basin (cf) Area (sf) Perc . (cf) Vol. (cf) Depth (ft Vol . (cf) Rate (cfs) 0:15 0.2 0 .04 0 .33 0.03 0.0076 0.0135 12.15 0 .00 0.00 0 .00 0 .00 0 .00 12.14 1651.99 12.14 0.00 0 .00 0.00 0 .00 0:30 0.3 0.06 0.32 0.05 0 .0115 0 .0202 18.22 0.00 0 .00 0.00 0.00 0.00 18.22 1651 .99 18 .22 0 .00 0 .00 0.00 0 .00 0:45 0. 3 0.06 0.32 0.05 0 .0115 0.0202 18.22 0.00 0.00 0.00 0.00 0.00 18.22 1651.99 18 .22 0.00 0 .00 0 .00 0 .00 1:00 0. 4 0.08 0.32 0.06 0 .0153 0 .0270 24.29 0.00 0.00 0.00 0.00 0.00 24.29 1651 .99 24 .29 0.00 0 .00 0 .00 0 .00 1:15 0.3 0.06 0 .31 0.05 0.0115 0.0202 18 .22 0 .00 0.00 0 .00 0 .00 0 .00 18.22 1651.99 18.22 0.00 0 .00 0.00 0 .00 1:30 0.3 0. 06 0 .31 0.05 0 .0115 0 .0202 18 .22 0 .00 0.00 0.00 0 .00 0 .00 18.22 1651 .99 18 .22 0.00 0 .00 0.00 0.00 1:45 0.3 0.06 0.30 0 .05 0.0115 0.0202 18.22 0.00 0 .00 0.00 0.00 0.00 18.22 1651.99 18.22 0 .00 0 .00 0.00 0 .00 2:00 0. 4 0.08 0.30 0.06 0.0153 0.0270 24.29 0.00 0.00 0.00 0.00 0.00 24.29 1651.99 24.29 0.00 0 .00 0 .00 0 .00 2:15 0. 4 0.08 0.30 0.06 0 .0153 0.0270 24.29 0.00 0.00 0.00 0.00 0.00 24.29 1651.99 24 .29 0.00 0 .00 0 .00 0 .00 2:30 0.4 0. 08 0. 29 0.06 0.0153 0.0270 24 .29 0 .00 0.00 0.00 0 .00 0 .00 24.29 1651.99 24.29 0.00 0.00 0.00 0.00 2:45 0.5 0. 10 0. 29 0.08 0.0191 0.0337 30 .36 0 .00 0.00 0 .00 0 .00 0 .00 30.36 1651.99 30.36 0.00 0 .00 0.00 0 .00 3:00 0.5 0.10 0.29 0.08 0.0191 0 .0337 30.36 0.00 0 .00 0.00 0.00 0.00 30.36 1651 .99 30 .36 0 .00 0.00 0.00 0.00 3:15 0. 5 0.10 0.28 0.08 0.0191 0.0337 30.36 0.00 0.00 0.00 0.00 0.00 30.36 1651.99 30.36 0.00 0 .00 0 .00 0 .00 3:30 0. 5 0.10 0.28 0.08 0.0191 0 .0337 30.36 0.00 0.00 0.00 0.00 0.00 30.36 1651 .99 30 .36 0.00 0 .00 0 .00 0 .00 3:45 0.5 0. 10 0. 28 0.08 0.0191 0.0337 30 .36 0 .00 0.00 0 .00 0 .00 0 .00 30.36 1651.99 30.36 0.00 0 .00 0.00 0 .00 4:00 0.6 0. 11 0. 27 0.09 0. 0229 0.0405 36 .44 0 .00 0.00 0.00 0 .00 0.00 36.44 1651 .99 34 .42 2.02 0.00 0.00 0 .00 4:15 0.6 0.11 0.27 0. 09 0.0229 0.0405 36.44 0.00 0 .00 0.00 0.00 0.00 36.44 1652.31 34.42 4 .04 0.00 0.00 0.00 4:30 0. 7 0.13 0.27 0.11 0.0268 0.0472 42.51 0.00 0.00 0.00 0.00 0.00 42 .51 1652.63 34.43 12.12 0 .00 0 .00 0.00 4:45 0. 7 0.13 0.26 0.11 0. 0268 0.0472 42.51 0.00 0.00 0.00 0.00 0.00 42.51 1653.90 34 .46 20.17 0 .01 0 .00 0 .00 5:00 0.8 0. 15 0. 26 0. 12 0.0306 0.0540 48 .58 0 .00 0.00 0.00 0 .00 0.00 48.58 1655.17 34.48 34.27 0.01 0.00 0.00 5:15 0.6 0. 11 0. 26 0.09 0.0229 0.0405 36.44 0 .00 0.00 0 .00 0 .00 0 .00 36.44 1657.40 34.53 36.18 0 .01 0.00 0 .00 5:30 0.7 0.13 0.25 0.11 0. 0268 0. 0472 42.51 0.00 0 .00 0.00 0.00 0.00 42.51 1657.70 34 .54 44.16 0 .02 0.00 0.00 5:45 0. 8 0.15 0.25 0.12 0. 0306 0.0540 48.58 0.00 0.00 0.00 0.00 0.00 48.58 1658.96 34 .56 58.18 0 .02 0 .00 0 .00 6:00 0. 8 0.15 0.25 0.12 0. 0306 0. 0540 48.58 0.00 0.00 0.00 0.00 0.00 48.58 1661.17 34 .61 72.16 0 .03 0 .00 0 .00 6:15 0.9 0. 17 0. 24 0.14 0.0344 0.0607 54. 66 0.00 0.00 0 .00 0 .00 0 .00 54.66 1663.37 34.65 92.16 0 .04 0.00 0 .00 6:30 0.9 0. 17 0. 24 0.14 0. 0344 0. 0607 54. 66 0.00 0.00 0.00 0 .00 0 .00 54.66 1666 .53 34 .72 112.10 0.04 0.00 0.00 6:45 1 0.19 0.24 0. 15 0.0382 0.0675 60.73 0.00 0 .00 0.00 0.00 0.00 60.73 1669.67 34.78 138 .04 0 .05 0.00 0 .00 7:00 1 0.19 0.23 0.15 0.0382 0.0675 60.73 0.00 0.00 0.00 0.00 0.00 60.73 1673.76 34.87 163.90 0 .06 0 .00 0 .00 7:15 1 0.19 0.23 0.15 0. 0382 0.0675 60.73 0.00 0.00 0.00 0.00 0.00 60.73 1677 .84 34 .96 189.68 0 .07 0 .00 0 .00 7:30 1.1 0. 21 0.23 0. 17 0.0421 0.0742 66. 80 0. 00 0.00 0.00 0 .00 0.00 66.80 1681.91 35.04 221.44 0.08 0.00 0.00 7:45 1.2 0. 23 0. 22 0.18 0.0459 0.0810 72. 88 0. 00 0.00 0 .00 0 .00 0 .00 72.88 1686.92 35 .14 259.17 0 .10 0.00 0 .00 8:00 1. 3 0.25 0.22 0.20 0.0497 0. 0877 78.95 0.00 0. 00 0.00 0.00 0.00 78.95 1692.87 35 .27 302 .85 0.12 0.00 0 .00 8:15 1. 5 0.29 0.22 N/A 0. 0697 0.1229 110.65 0.00 0.00 0.00 0.00 0.00 110.65 1699 .76 35.41 378.09 0 .14 0 .00 0 .00 8:30 1. 5 0.29 0.21 N/A 0. 0727 0. 1283 115.47 0.00 0.00 0.00 0.00 0.00 115.47 1711.63 35 .66 457.90 0 .18 0 .00 0 .00 8:45 1.6 0. 31 0. 21 N/A 0.0948 0.1673 150. 61 0. 00 0.00 0. 00 0.00 0 .00 150.61 1724.22 35 .92 572.59 0 .22 0.00 0 .00 9:00 1.7 0. 33 0. 21 N/A 0. 1169 0. 2063 185. 71 0. 00 0.00 0.00 0.00 0.00 185.71 1742 .31 36 .30 722.00 0 .28 0.00 0 .00 9:15 1.9 0.36 0.21 N/A 0.1581 0.2790 251.13 0.00 0. 00 0.00 0.00 0.00 251.13 1765.88 36.79 936.35 0 .36 0.00 0 .00 9:30 2 0.38 0.20 N/A 0.1802 0.3179 286.14 0.00 0.00 0.00 0.00 0.00 286.14 1799.69 37.49 1185.00 0.45 0 .00 0 .00 9:45 2. 1 0.40 0.20 N/A 0. 2022 0. 3568 321.11 0.00 0.00 0.00 0.00 0.00 321.11 1838 .91 38 .31 1467.80 0 .56 0 .00 0 .00 10:00 2.2 0. 42 0. 20 N/A 0.2242 0.3956 356. 03 0. 00 0.00 0.00 0. 00 0.00 356.03 1883.51 39.24 1784 .59 0.68 0.00 0.00 10:15 1.5 0. 29 0. 19 N/A 0.0932 0.1644 147.99 0. 00 0.00 0. 00 0. 00 0. 00 147.99 1933.48 40.28 1892.30 0 .72 0.00 0 .00 10:30 1.5 0.29 0.19 N/A 0.0960 0.1694 152.46 0.00 0. 00 0.00 0.00 0.00 152.46 1950.48 40 .63 2004.13 0 .77 0.00 0.00 10:45 2 0.38 0.19 N/A 0. 1944 0. 3430 308.71 0.00 0.00 0.00 0.00 0.00 308.71 1968 .11 41 .00 2271.84 0 .87 0 .00 0 .00 11:00 2 0.38 0.19 N/A 0.1971 0. 3479 313.09 0.00 0.00 0.00 0.00 0.00 313.09 2010 .34 41 .88 2543.05 0 .97 0 .00 0 .00 11:15 1.9 0.36 0.18 N/A 0.1808 0.3190 287.06 0.00 0. 00 0.00 0.00 0.00 287.06 2053.12 42.77 2787.34 1.07 0.00 0 .00 11:30 1. 9 0. 36 0. 18 N/A 0.1835 0. 3237 291. 35 0. 00 0.00 0.00 0. 00 0.00 291.35 2091.66 43 .58 3035.11 1.16 0.00 0.00 11:45 1.7 0.33 0.18 N/A 0.1479 0.2609 234.85 0.00 0. 00 0.00 0.00 0.00 234.85 2130.74 44.39 3225.57 1.23 0.00 0 .00 1' 12:00 1. 8 0.34 0.17 N/A 0.1696 0.2993 269.41 0.00 0.00 0.00 0.00 0.00 269.41 2160.78 45.02 3449.97 1 .32 0 .00 0 .00 v 12:15 2. 5 0.48 0.17 N/A 0. 3061 0.5401 486.11 0.00 0.00 0.00 0.00 0.00 486.11 2196. 18 45.75 3890 .33 1 .49 0 .00 0 .00 12:30 2.6 0. 50 0. 17 N/A 0.3278 0.5784 520. 57 0. 00 0.00 0.00 0. 00 0.00 520.57 2265. 64 47.20 4363 .70 1.67 0.00 0.00 12:45 2.8 0. 54 0. 17 N/A 0.3686 0.6504 585. 35 0. 00 0.00 0. 00 0. 00 0. 00 585.35 2340.30 48.76 4900.29 1.87 0.00 0 .00
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13:00 2.9 0.55 0.16 N/A 0.3902 0 .6886 619.71 0.00 0.00 0.00 0.00 0.00 619.71 2424.94 50.52 5469.48 2 .09 0 .00 0 .00 13:15 3 .4 0.65 0.16 N/A 0.4883 0 .8616 775.48 0.00 0.00 0.00 0.00 0.00 775.48 2514 .73 52 .39 6192.58 2 .37 0 .00 0 .00 13:30 3.4 0 .65 0 .16 N/A 0 .4908 0 .8660 779 .38 0 .00 0.00 0.00 0 .00 0.00 779.38 2628.78 54.77 6917 .19 2.65 0.00 0.00 13:45 2.3 0 .44 0 .16 N/A 0.2829 0.4991 449 .22 0 .00 0.00 0 .00 0 .00 0 .00 449.22 2743.08 57.15 7309.26 2.80 0.00 0 .00 14:00 2.3 0.44 0.15 N/A 0.2852 0.5033 453.01 0.00 0 .00 0.00 0.00 0.00 453.01 2804.93 58 .44 7703 .84 2.95 0.00 0 .00 14:15 2. 7 0.52 0.15 N/A 0 .3641 0 .6425 578.22 0.00 0.00 0.00 0.00 0.00 578.22 2867 .17 59 .73 8222 .32 3 .15 0 .00 0 .00 14:30 2. 6 0.50 0.15 N/A 0 .3473 0 .6128 551.54 0.00 0.00 0.00 0.00 0.00 551.54 2948.95 61 .44 8712.43 3 .33 0 .00 0 .00 14:45 2.6 0.50 0 .15 N/A 0.3496 0.6169 555 .18 0 .00 0.00 0 .00 0 .00 0 .00 555.18 3026.26 63.05 9204 .56 3 .52 0.00 0 .00 15:00 2. 5 0. 48 0 .15 N/A 0 .3327 0.5871 528 .40 0 .00 0.00 0.00 0 .00 0.00 528.40 3103 .88 64 .66 9668.30 3 .70 0.00 0.00 15:15 2.4 0.46 0.14 N/A 0.3158 0.5573 501.57 0.00 0 .00 0.00 0.00 0.00 501.57 3177.03 66.19 10103 .68 3 .86 0.00 0 .00 15:30 2.3 0.44 0.14 N/A 0 .2989 0 .5274 474.68 0.00 0.00 0.00 0.00 0.00 474.68 3245.71 67.62 10510.74 4 .02 0 .00 0 .00 15:45 1. 9 0.36 0.14 N/A 0 .2246 0.3963 356.64 0.00 0.00 0.00 0.00 0.00 356.64 3309 .92 68 .96 10798.42 4 .13 0 .00 0 .00 16:00 1.9 0. 36 0. 14 N/A 0.2267 0.4000 360 .00 0 .00 0.00 0.00 0 .00 0 .00 360.00 3355.29 69.90 0.00 0.00 16:15 0.4 0. 08 0. 13 0.06 0.0153 0.0270 24 .29 0 .00 0.00 0 .00 0 .00 0 .00 24.29 3401.05 70.86 11041.96 4.22 0.00 0 .00 16:30 0.4 0.08 0.13 0.06 0.0153 0 .0270 24.29 0.00 0 .00 0.00 0.00 0.00 24.29 3393.71 70 .70 10995 .54 4.21 0.00 0.00 16:45 0. 3 0.06 0.13 0.05 0.0115 0.0202 18.22 0.00 0.00 0.00 0.00 0.00 18.22 3386 .39 70.55 10943.21 4.19 0 .00 0 .00 17:00 0. 3 0.06 0.13 0.05 0.0115 0 .0202 18.22 0.00 0.00 0.00 0.00 0.00 18.22 3378.13 70 .38 10891.06 4.17 0 .00 0 .00 17:15 0.5 0. 10 0. 13 0.08 0.0191 0.0337 30 .36 0 .00 0.00 0 .00 0 .00 0 .00 30.36 3369.91 70.21 10851.21 4 .15 0.00 0 .00 17:30 0.5 0. 10 0. 12 0.08 0. 0191 0.0337 30 .36 0 .00 0.00 0.00 0 .00 0.00 30.36 3363.62 70 .08 10811.50 4 .14 0.00 0 .00 17:45 0.5 0.10 0.12 0. 08 0.0191 0.0337 30.36 0.00 0 .00 0.00 0.00 0.00 30.36 3357.36 69.94 10771.92 4.12 0.00 0.00 18:00 0. 4 0.08 0.12 0.06 0. 0153 0.0270 24.29 0.00 0.00 0.00 0.00 0.00 24.29 3351.11 69.81 10726.40 4.10 0 .00 0.00 18:15 0. 4 0.08 0.12 0.06 0. 0153 0.0270 24.29 0.00 0.00 0.00 0.00 0.00 24.29 3343 .93 69.67 10681.03 4 .09 0 .00 0 .00 18:30 0.4 0. 08 0. 12 0. 06 0.0153 0.0270 24 .29 0 .00 0.00 0.00 0 .00 0.00 24.29 3336.78 69.52 10635.80 4.07 0.00 0.00 18:45 0.3 0. 06 0. 12 0.05 0.0115 0.0202 18.22 0 .00 0.00 0 .00 0 .00 0 .00 18 .22 3329.64 69.37 10584 .65 4.05 0.00 0 .00 19:00 0.2 0.04 0.11 0.03 0. 0076 0. 0135 12.15 0.00 0 .00 0.00 0.00 0.00 12.15 3321 .58 69 .20 10527 .60 4.03 0.00 0.00 19:15 0. 3 0.06 0.11 0.05 0. 0115 0.0202 18.22 0.00 0.00 0.00 0.00 0.00 18 .22 3312 .58 69.01 10476.81 4 .01 0 .00 0 .00 19:30 0. 4 0.08 0.11 0.06 0. 0153 0. 0270 24.29 0.00 0.00 0.00 0.00 0.00 24.29 3304 .56 68 .85 10432.25 3 .99 0 .00 0 .00 19:45 0.3 0. 06 0. 11 0.05 0.0115 0.0202 18. 22 0.00 0.00 0 .00 0 .00 0 .00 18.22 3297.54 68.70 10381.77 3.97 0.00 0 .00 20:00 0.2 0. 04 0. 11 0.03 0. 0076 0. 0135 12. 15 0.00 0.00 0.00 0 .00 0 .00 12.15 3289 .57 68 .53 10325.39 3 .95 0.00 0.00 20:15 0.3 0.06 0.11 0. 05 0.0115 0.0202 18.22 0.00 0 .00 0.00 0.00 0.00 18.22 3280.68 68.35 10275 .26 3.93 0.00 0 .00 20:30 0.3 0.06 0.11 0.05 0.0115 0.0202 18.22 0.00 0.00 0.00 0.00 0.00 18.22 3272.77 68.18 10225.30 3.91 0 .00 0 .00 20:45 0.3 0.06 0.10 0.05 0. 0115 0.0202 18.22 0.00 0.00 0.00 0.00 0.00 18.22 3264 .89 68 .02 10175.50 3 .89 0 .00 0 .00 21:00 0.2 0. 04 0. 10 0. 03 0.0076 0.0135 12. 15 0. 00 0.00 0.00 0 .00 0.00 12.15 3257.04 67.85 10119 .79 3.87 0.00 0.00 21:15 0.3 0. 06 0. 10 0.05 0.0115 0.0202 18. 22 0. 00 0.00 0 .00 0 .00 0 .00 18.22 3248.25 67.67 10070.33 3.85 0.00 0 .00 21:30 0. 2 0.04 0.10 0.03 0. 0076 0. 0135 12.15 0.00 0. 00 0.00 0.00 0.00 12.15 3240.45 67 .51 10014.97 3 .83 0.00 0 .00 21:45 0.3 0.06 0.10 0.05 0. 0115 0.0202 18.22 0.00 0.00 0.00 0.00 0.00 18.22 3231 .72 67 .33 9965.86 3 .81 0 .00 0 .00 22:00 0. 2 0.04 0.10 0.03 0. 0076 0. 0135 12.15 0.00 0.00 0.00 0.00 0.00 12.15 3223.97 67 .17 9910.84 3 .79 0 .00 0 .00 22:15 0.3 0. 06 0. 10 0.05 0.0115 0.0202 18. 22 0. 00 0.00 0. 00 0.00 0 .00 18.22 3215.29 66.99 9862.08 3.77 0.00 0 .00 22:30 0. 2 0. 04 0. 10 0.03 0.0076 0. 0135 12. 15 0. 00 0.00 0.00 0.00 0.00 12.15 3207.60 66 .82 9807.40 3.75 0.00 0 .00 22:45 0.2 0.04 0.10 0. 03 0.0076 0.0135 12.15 0.00 0. 00 0.00 0.00 0.00 12.15 3198.97 66.65 9752 .90 3.73 0.00 0 .00 23:00 0.2 0.04 0.09 0.03 0.0076 0.0135 12.15 0.00 0.00 0.00 0.00 0.00 12.15 3190.38 66.47 9698.58 3 .71 0 .00 0 .00 23:15 0.2 0.04 0.09 0.03 0. 0076 0.0135 12.15 0.00 0.00 0.00 0.00 0.00 12.15 3181 .81 6629 9644.44 3 .69 0 .00 0 .00 23:30 0.2 0. 04 0. 09 0. 03 0.0076 0.0135 12. 15 0. 00 0.00 0.00 0. 00 0.00 12.15 3173.27 66.11 9590.47 3.67 0.00 0.00 23:45 0.2 0. 04 0. 09 0.03 0.0076 0.0135 12. 15 0. 00 0.00 0. 00 0. 00 0. 00 12.15 3164.76 65.93 9536.69 3 .65 0.00 0 .00 24:00 0.2 0.04 0.09 0.03 0.0076 0.0135 12.15 0.00 0. 00 0.00 0.00 0.00 12.15 3156.27 65.76 9483 .08 3 .63 0.00 0 .00 0 0.00 0.09 0.00 0. 0000 0. 0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3147 .82 65.58 9417 .50 3 .60 0 .00 0 .00 Total volume (cf) 14184.83 Total Overflow (cf)
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HYDROLOGY CALCULATIONS -
Using the RCFC&WCD Short Cut Unit Hydrograph Method
Area Designations Basin D
Drainage Area (ac.) 0.5600
Unit time (minutes) 5 5 5 15
100 Year Storm Duration (hrs) 1 3 6 24
Total Precipitation (Plates D -4.4,E-5.2, 5.4, 5.6)(in.) 1.76 2.49 3.24 4.78 Or data from NOAA interactive website Soils Group A
AMC index II Runoff Number (plate E-6.1) 32
Plate E-6.2 Pervious Area Loss Rate (Fp)(in/hr) 0.74 (AMC II) Percentage of Impervious Cover (Ai)(%) (plate E-6.3) 79 (See impervious/pervious area calculations included in report) Weighted Average Loss Rate (F=Fp(1-.9Ai))(in./hr.) 0.21 (used for 1, 3, and 6 hour storm, the 24 hour storm uses variable maximum loss rate per plate E-1.1 (3 of 6)) Low Loss Rate Percent (%) 80
Retention Basin Percolation Rate (in/hr) 1 (also used for drywell percolation rate) Percolation is taken incrementally.
Basin volume is calculated using the "truncated pyramid" formula, a more conservative estimate than "averaged end areas" sometimes used The measured elevation of the underground chamber top and bottom are to be determined. (Drywell can be "zeroed out" by reducing numbers to less than .001, but should not entered as zeros or program chokes.) Drywell storage includes 40% of the 1' wide rock bed surrounding the drywell: formula (upper)*PIQ*(diam/2)^2+(lower)*PIQ*((diam/2)^2+0.4*((diam/2+(grav+0.4166))^2-(diam/2+0.4166)^2)) The drywell wall thickness is assumed at 5" (0.4166) and the gravel bed width is variable "gray" Drywell design factors Upper sec. (ft.)= 0.001 Lower sec. (ft.)= Gravel bed width around drwyell= 1
1001
Ring diam. (ft.) = 0.001 Drywell lower max. (cf)= 0.00 Upper max.(cf)= 0.00 Drywell total(cf)= 0.00
NOTE: The basin top and bottom are defined as the required bed size provided by ADS, and rather than using the actual max depth, the depth has been adjusted for the max. storage to approximately be the provided volume of the chambers after taking the stone space into account. The StormTech fact sheet is provided in Appendix G.
Ret. Basin design (area, depth) Top = 1137.45 s.f. Bot. = 1137.45 s.f.
Formulas vol=(h/3)*(bottom+top+(bottom*top)^0.50) area=bottom+(h/d)*(top-bottom) Outside input from: N/A
Max. Depth (d)= 3.275 Max. storage= 3725.15 (d/3)*(bottom+top+(bottom*top)^0.50) h=(vol*3)/(bottom+top+(bottom*top)"0.5) (values must be non -zero or error occurs) 1 Hour Storm in 5 minute increments Drywell Drywell Drywell Drywell Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflow Overflow % Rain (in/hr Max. Min. Rain (in/hr Rate (cfs) Vol. (cf) Input (cf) Area (sf) Perc. (cf) Vol. (cf) Depth (ft) Basin (cf) Area (sf) Perc. (cf) Vol. (cf) Depth (ft Vol. (cf) Rate (cfs) 0:05 3.7 0.7814 0.2139 N/A 0.5676 0.3205 96.15 0.00 0.00 0.00 0.00 0.00 96.15 1137.45 7.90 88.25 0.08 0.00 0.00 0:10 4.8 1.0138 0.2139 N/A 0.7999 0.4517 135.50 0.00 0.00 0.00 0.00 0.00 135.50 1137.45 7.90 215.85 0.19 0.00 0.00 0:15 5.1 1.0771 0.2139 N/A 0.8633 0.4875 146.24 0.00 0.00 0.00 0.00 0.00 146.24 1137.45 7.90 354.19 0.31 0.00 0.00 0:20 4.9 1.0349 0.2139 N/A 0.8210 0.4636 139.08 0.00 0.00 0.00 0.00 0.00 139.08 1137.45 7.90 485.37 0.43 0.00 0.00 0:25 6.6 1.3939 0.2139 N/A 1.1801 0.6663 199.90 0.00 0.00 0.00 0.00 0.00 199.90 1137.45 7.90 677.37 0.60 0.00 0.00 0:30 7.3 1.5418 0.2139 N/A 1.3279 0.7498 224.95 0.00 0.00 0.00 0.00 0.00 224.95 1137.45 7.90 894.42 0.79 0.00 0.00 0:35 8.4 1.7741 0.2139 N/A 1.5602 0.8810 264.30 0.00 0.00 0.00 0.00 0.00 264.30 1137.45 7.90 1150.82 1.01 0.00 0.00 0:40 9 1.9008 0.2139 N/A 1.6869 0.9526 285.77 0.00 0.00 0.00 0.00 0.00 285.77 1137.45 7.90 1428.69 1.26 0.00 0.00 0:45 12.3 2.5978 0.2139 N/A 2.3839 1.3461 403.83 0.00 0.00 0.00 0.00 0.00 403.83 1137.45 7.90 1824.63 1.60 0.00 0.00 0:50 17.6 3.7171 0.2139 N/A 3.5033 1.9782 593.45 0.00 0.00 0.00 0.00 0.00 593.45 1137.45 7.90 2410.18 2.12 0.00 0.00 0:55 16.1 3.4003 0.2139 N/A 3.1865 1.7993 539.79 0.00 0.00 0.00 0.00 0.00 539.79 1137.45 7.90 2942.07 2.59 0.00 0.00 1:00 4.2 0.8870 0.2139 N/A 0.6732 0.3801 114.04 0.00 0.00 0.00 0.00 0.00 114.04 1137.45 7.90 3048.20 2.68 0.00 0.00 0 0.0000 0.2139 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1137.45 7.90 3040.30 2.67 0.00 0.00 0 0.0000 0.2139 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1137.45 7.90 3032.41 2.67 0.00 0.00 1:15 0 0.0000 0.2139 0.00 0.0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1137.45 7.90 3024.51 2.66 0.00 0.00 Total volume (cf) 3142.99 Total Overflow (cf) 0.00
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3 Hour Storm in 5 minute increments Drywell Drywell Drywell Dry well Overflow Basin Basin Basin Time Pattern Storm Loss Rate Value Effective Flo w Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflo w Overflow % Rain (in/hr Max. Min . Rain (in/hr Rate (cfs) Vol. (cf) Input (cf) Area (sf) Perc. (cf, Vol. (cf) Depth (ft) Basin (cf) Area (sf) Perc . (cf) Vol. (cf) Depth (ft Vol . (cf) Rate (cfs) 0:05 1.3 0.39 0.21 N/A 0.1746 0 .0986 29.57 0.00 0 .00 0.00 0.00 0.00 29.57 1137.45 7.90 21 .67 0.02 0.00 0 .00 0:10 1. 3 0.39 0.21 N/A 0 .1746 0.0986 29.57 0.00 0.00 0.00 0.00 0.00 29.57 1137 .45 7 .90 43.35 0 .04 0 .00 0 .00 0:15 1. 1 0.33 0.21 N/A 0.1148 0 .0648 19.45 0.00 0.00 0.00 0.00 0.00 19.45 1137.45 7 .90 54.90 0 .05 0 .00 0 .00 0:20 1.5 0.45 0 .21 N/A 0.2343 0.1323 39 .70 0 .00 0.00 0 .00 0 .00 0 .00 39.70 1137 .45 7.90 86.70 0 .08 0.00 0 .00 0:25 1.5 0. 45 0 .21 N/A 0.2343 0 .1323 39 .70 0 .00 0.00 0.00 0 .00 0 .00 39.70 1137.45 7.90 118.50 0 .10 0.00 0.00 0:30 1.8 0.54 0.21 N/A 0.3240 0.1829 54.88 0.00 0 .00 0.00 0.00 0.00 54.88 1137 .45 7.90 165.48 0 .15 0.00 0 .00 0:35 1. 5 0.45 0.21 N/A 0 .2343 0.1323 39.70 0.00 0.00 0.00 0.00 0.00 39.70 1137.45 7 .90 197.28 0.17 0 .00 0 .00 0:40 1. 8 0.54 0.21 N/A 0 .3240 0.1829 54.88 0.00 0.00 0.00 0.00 0.00 54.88 1137.45 7 .90 244.26 0 .21 0 .00 0 .00 0:45 1.8 0. 54 0. 21 N/A 0.3240 0.1829 54 .88 0 .00 0.00 0.00 0 .00 0 .00 54.88 1137.45 7.90 291.24 0.26 0.00 0.00 0:50 1.5 0. 45 0. 21 N/A 0.2343 0.1323 39 .70 0 .00 0.00 0 .00 0 .00 0 .00 39.70 1137.45 7.90 323.04 0 .28 0.00 0 .00 0:55 1. 6 0.48 0.21 N/A 0.2642 0 .1492 44.76 0.00 0 .00 0.00 0.00 0.00 44.76 1137.45 7.90 359 .90 0 .32 0.00 0.00 1:00 1. 8 0.54 0.21 N/A 0.3240 0.1829 54.88 0.00 0.00 0.00 0.00 0.00 54.88 1137 .45 7 .90 406.88 0 .36 0 .00 0 .00 1:05 2. 2 0.66 0.21 N/A 0.4435 0 .2504 75.13 0.00 0.00 0.00 0.00 0.00 75.13 1137.45 7 .90 474.11 0.42 0 .00 0 .00 1:10 2.2 0. 66 0. 21 N/A 0. 4435 0.2504 75 .13 0 .00 0.00 0 .00 0 .00 0 .00 75.13 1137 .45 7.90 541.34 0 .48 0.00 0 .00 1:15 2. 2 0. 66 0. 21 N/A 0.4435 0.2504 75 .13 0 .00 0.00 0.00 0 .00 0.00 75.13 1137 .45 7.90 608.57 0 .54 0.00 0 .00 1:20 2 0.60 0.21 N/A 0.3837 0.2167 65.01 0.00 0 .00 0.00 0.00 0.00 65.01 1137 .45 7.90 665 .68 0.59 0.00 0.00 1:25 2.6 0.78 0.21 N/A 0.5630 0.3179 95.38 0.00 0.00 0.00 0.00 0.00 95.38 1137.45 7 .90 753.16 0 .66 0 .00 0.00 1:30 2. 7 0.81 0.21 N/A 0. 5929 0.3348 100.44 0.00 0.00 0.00 0.00 0.00 100.44 1137.45 7 .90 845.70 0 .74 0 .00 0 .00 1:35 2.4 0. 72 0. 21 N/A 0.5033 0.2842 85 .25 0 .00 0.00 0.00 0 .00 0.00 85.25 1137.45 7.90 923.05 0.81 0.00 0.00 1:40 2.7 0. 81 0. 21 N/A 0.5929 0.3348 100.44 0 .00 0.00 0 .00 0 .00 0 .00 100.44 1137.45 7.90 1015.59 0 .89 0.00 0 .00 1:45 3. 3 0.99 0.21 N/A 0. 7722 0. 4360 130.81 0.00 0 .00 0.00 0.00 0.00 130.81 1137.45 7.90 1138.50 1.00 0.00 0.00 1:50 3. 1 0.93 0.21 N/A 0. 7124 0.4023 120.68 0.00 0.00 0.00 0.00 0.00 120.68 1137 .45 7 .90 1251 .28 1 .10 0 .00 0 .00 1:55 2. 9 0.87 0.21 N/A 0. 6527 0. 3685 110.56 0.00 0.00 0.00 0.00 0.00 110.56 1137.45 7 .90 1353.94 1 .19 0 .00 0 .00 2:00 3 0. 90 0. 21 N/A 0.6825 0.3854 115. 62 0.00 0.00 0 .00 0 .00 0 .00 115.62 1137 .45 7.90 1461.67 1.29 0.00 0 .00 2:05 3.1 0. 93 0. 21 N/A 0.7124 0. 4023 120. 68 0.00 0.00 0.00 0 .00 0.00 120.68 1137.45 7.90 1574.45 1.38 0.00 0.00 2:10 4.2 1.25 0.21 N/A 1.0411 0.5879 176.36 0.00 0 .00 0.00 0.00 0.00 176.36 1137 .45 7.90 1742 .91 1.53 0.00 0 .00 2:15 5 1.49 0.21 N/A 1. 2801 0.7229 216.86 0.00 0.00 0.00 0.00 0.00 216.86 1137.45 7 .90 1951.87 1 .72 0 .00 0 .00 2:20 3. 5 1.05 0.21 N/A 0. 8319 0. 4698 140.93 0.00 0.00 0.00 0.00 0.00 140.93 1137.45 7 .90 2084.90 1 .83 0 .00 0 .00 2:25 6.8 2. 03 0. 21 N/A 1.8180 1.0266 307. 97 0. 00 0.00 0.00 0 .00 0.00 307.97 1137.45 7.90 2384 .97 2.10 0.00 0.00 2:30 7.3 2. 18 0. 21 N/A 1.9674 1.1109 333. 27 0. 00 0.00 0 .00 0 .00 0 .00 333 .27 1137.45 7.90 2710.35 2.38 0.00 0 .00 2:35 8.2 2.45 0.21 N/A 2. 2363 1.2628 378. 83 0.00 0. 00 0.00 0.00 0.00 378.83 1137.45 7.90 3081 .28 2.71 0.00 0 .00 2:40 5. 9 1.76 0.21 N/A 1. 5491 0. 8747 262.41 0.00 0.00 0.00 0.00 0.00 262.41 1137 .45 7 .90 3335.79 2 .93 0 .00 0 .00 2:45 2 0.60 0.21 N/A 0. 3837 0. 2167 65.01 0.00 0.00 0.00 0.00 0.00 65.01 1137.45 7 .90 3392.89 2 .98 0 .00 0 .00 2:50 1.8 0. 54 0. 21 N/A 0.3240 0.1829 54. 88 0. 00 0.00 0. 00 0.00 0 .00 54.88 1137 .45 7.90 3439.88 3 .02 0.00 0 .00 2:55 1.8 0. 54 0. 21 N/A 0. 3240 0. 1829 54. 88 0. 00 0.00 0.00 0.00 0.00 54.88 1137.45 7.90 3486 .86 3.07 0.00 0 .00 3:00 0.6 0.18 0.21 0. 14 0.0359 0.0202 6.07 0.00 0. 00 0.00 0.00 0.00 6.07 1137 .45 7.90 3485 .04 3.06 0.00 0 .00 0 0.00 0.21 0.00 0. 0000 0. 0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1137.45 7 .90 3477.14 3 .06 0 .00 0 .00 0 0.00 0.21 0.00 0. 0000 0. 0000 0.00 0.00 0.00 0.00 0.00 0.00 0 .00 1137.45 7 .90 3469 .24 3 .05 0 .00 0 .00 3:15 0 0. 00 0. 21 0. 00 0.0000 0.0000 0. 00 0. 00 0.00 0.00 0. 00 0.00 0.00 1137.45 7.90 3461.34 3.04 0.00 0.00 0 0. 00 0. 21 0.00 0.0000 0.0000 0. 00 0. 00 0.00 0. 00 0. 00 0. 00 0.00 1137.45 7.90 3453.44 3.04 0.00 0 .00 0 0.00 0.21 0.00 0.0000 0.0000 0.00 0.00 0. 00 0.00 0.00 0.00 0.00 1137.45 7.90 3445 .54 3.03 0.00 0.00 3:30 0 0.00 0.21 0.00 0. 0000 0. 0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1137 .45 7 .90 3437.64 3 .02 0 .00 0 .00 0 0.00 0.21 0.00 0. 0000 0. 0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1137.45 7 .90 3429.74 3 .02 0.00 0.00 0 0.00 0.21 0. 00 0.0000 0.0000 0.00 0.00 0. 00 0.00 0.00 0.00 0. 00 1137.45 7.90 3421 .84 3.01 0.00 0.00 Total volume (cf) 3769.40 Total Overflow (cf) 0.00
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6 Hour Storm in 5 minute increments Dry well Drywell Dry well Drywell Overflow Basin Basin Basin Time Pattem Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflo w Overflow % Rain (in/hr Max. Min . Rain (in/hr Rate (cfs) Vol. (cf) Input (cf) Area (sf) Perc . (cf, Vol . (cf) Depth (ft) Basin (cf) Area (sf) Perc . (cf) Vol. (cf) Depth (ft Vol . (cf) Rate (cfs) 0:05 0.5 0 .19 0 .21 0.16 0.0389 0.0220 6 .59 0 .00 0.00 0 .00 0 .00 0 .00 6.58 1137.45 6.58 0.00 0 .00 0.00 0 .00 0:10 0.6 0.23 0.21 0.19 0.0467 0 .0263 7.90 0.00 0 .00 0.00 0.00 0.00 7.90 1137.45 7.90 0 .00 0 .00 0.00 0 .00 0:15 0. 6 0.23 0.21 0.19 0 .0467 0.0263 7.90 0.00 0.00 0.00 0.00 0.00 7.90 1137 .45 7 .90 0.01 0 .00 0 .00 0 .00 0:20 0. 6 0.23 0.21 0.19 0 .0467 0 .0263 7.90 0.00 0.00 0.00 0.00 0.00 7.90 1137.45 7 .90 0.01 0 .00 0 .00 0 .00 0:25 0.6 0.23 0 .21 0.19 0.0467 0.0263 7.90 0 .00 0.00 0 .00 0 .00 0 .00 7.90 1137 .45 7.90 0.02 0 .00 0.00 0 .00 0:30 0.7 0. 27 0 .21 N/A 0.0583 0 .0329 9 .88 0 .00 0.00 0.00 0 .00 0 .00 9.88 1137.45 7.90 2.00 0 .00 0.00 0.00 0:35 0.7 0.27 0.21 N/A 0.0583 0.0329 9.88 0.00 0 .00 0.00 0.00 0.00 9.88 1137 .45 7.90 3 .97 0 .00 0.00 0 .00 0:40 0. 7 0.27 0.21 N/A 0 .0583 0.0329 9.88 0.00 0.00 0.00 0.00 0.00 9.88 1137.45 7 .90 5.95 0 .01 0 .00 0 .00 0:45 0. 7 0.27 0.21 N/A 0 .0583 0 .0329 9.88 0.00 0.00 0.00 0.00 0.00 9.88 1137.45 7 .90 7.93 0 .01 0 .00 0 .00 0:50 0.7 0. 27 0. 21 N/A 0.0583 0.0329 9 .88 0 .00 0.00 0.00 0 .00 0 .00 9.88 1137.45 7.90 9.90 0.01 0.00 0.00 0:55 0.7 0. 27 0. 21 N/A 0.0583 0.0329 9 .88 0 .00 0.00 0 .00 0 .00 0 .00 9.88 1137.45 7.90 11.88 0 .01 0.00 0 .00 1:00 0.8 0.31 0.21 N/A 0.0972 0.0549 16.46 0.00 0 .00 0.00 0.00 0.00 16.46 1137.45 7.90 20.44 0.02 0.00 0.00 1:05 0. 8 0.31 0.21 N/A 0.0972 0 .0549 16.46 0.00 0.00 0.00 0.00 0.00 16.46 1137 .45 7 .90 29.01 0 .03 0 .00 0 .00 1:10 0. 8 0.31 0.21 N/A 0.0972 0 .0549 16.46 0.00 0.00 0.00 0.00 0.00 16.46 1137.45 7 .90 37.57 0 .03 0 .00 0 .00 1:15 0.8 0. 31 0. 21 N/A 0.0972 0.0549 16 .46 0 .00 0.00 0 .00 0 .00 0 .00 16.46 1137 .45 7.90 46.13 0 .04 0.00 0 .00 1:20 0.8 0. 31 0. 21 N/A 0. 0972 0.0549 16 .46 0 .00 0.00 0.00 0 .00 0.00 16.46 1137 .45 7.90 54.70 0.05 0.00 0 .00 1:25 0.8 0.31 0.21 N/A 0.0972 0.0549 16.46 0.00 0 .00 0.00 0.00 0.00 16.46 1137 .45 7.90 63.26 0.06 0.00 0.00 1:30 0. 8 0.31 0.21 N/A 0.0972 0.0549 16.46 0.00 0.00 0.00 0.00 0.00 16.46 1137.45 7 .90 71.82 0 .06 0 .00 0.00 1:35 0. 8 0.31 0.21 N/A 0. 0972 0. 0549 16.46 0.00 0.00 0.00 0.00 0.00 16.46 1137.45 7 .90 80 .39 0 .07 0 .00 0 .00 1:40 0.8 0. 31 0. 21 N/A 0.0972 0.0549 16 .46 0 .00 0.00 0.00 0 .00 0.00 16.46 1137.45 7.90 88 .95 0.08 0.00 0.00 1:45 0.8 0. 31 0. 21 N/A 0.0972 0.0549 16.46 0 .00 0.00 0 .00 0 .00 0 .00 16.46 1137.45 7.90 97.51 0 .09 0.00 0 .00 1:50 0.8 0.31 0.21 N/A 0. 0972 0. 0549 16.46 0.00 0 .00 0.00 0.00 0.00 16.46 1137.45 7.90 106.08 0 .09 0.00 0.00 1:55 0. 8 0.31 0.21 N/A 0. 0972 0.0549 16.46 0.00 0.00 0.00 0.00 0.00 16.46 1137 .45 7 .90 114.64 0 .10 0 .00 0 .00 2:00 0. 9 0.35 0.21 N/A 0. 1361 0. 0768 23.05 0.00 0.00 0.00 0.00 0.00 23.05 1137.45 7 .90 129.79 0 .11 0 .00 0 .00 2:05 0.8 0. 31 0. 21 N/A 0.0972 0.0549 16. 46 0.00 0.00 0 .00 0 .00 0 .00 16.46 1137 .45 7.90 138.35 0 .12 0.00 0 .00 2:10 0.9 0. 35 0. 21 N/A 0. 1361 0. 0768 23. 05 0.00 0.00 0.00 0 .00 0 .00 23.05 1137.45 7.90 153.50 0 .13 0.00 0.00 2:15 0.9 0.35 0.21 N/A 0.1361 0.0768 23.05 0.00 0 .00 0.00 0.00 0.00 23.05 1137 .45 7.90 168 .65 0 .15 0.00 0 .00 2:20 0. 9 0.35 0.21 N/A 0.1361 0.0768 23.05 0.00 0.00 0.00 0.00 0.00 23.05 1137.45 7 .90 183.80 0.16 0 .00 0 .00 2:25 0. 9 0.35 0.21 N/A 0. 1361 0.0768 23.05 0.00 0.00 0.00 0.00 0.00 23.05 1137.45 7 .90 198.95 0 .17 0 .00 0 .00 2:30 0.9 0. 35 0. 21 N/A 0.1361 0.0768 23. 05 0. 00 0.00 0.00 0 .00 0.00 23.05 1137.45 7.90 214 .10 0.19 0.00 0.00 2:35 0.9 0. 35 0. 21 N/A 0.1361 0.0768 23. 05 0. 00 0.00 0 .00 0 .00 0 .00 23.05 1137.45 7.90 229.25 0 .20 0.00 0 .00 2:40 0.9 0.35 0.21 N/A 0.1361 0. 0768 23.05 0.00 0. 00 0.00 0.00 0.00 23.05 1137.45 7.90 244.40 0 .21 0.00 0 .00 2:45 1 0.39 0.21 N/A 0. 1749 0.0988 29.63 0.00 0.00 0.00 0.00 0.00 29.63 1137 .45 7 .90 266.14 0 .23 0 .00 0 .00 2:50 1 0.39 0.21 N/A 0.1749 0. 0988 29.63 0.00 0.00 0.00 0.00 0.00 29.63 1137.45 7 .90 287.87 0 .25 0 .00 0 .00 2:55 1 0. 39 0. 21 N/A 0.1749 0.0988 29. 63 0. 00 0.00 0. 00 0.00 0 .00 29.63 1137 .45 7.90 309.61 0 .27 0.00 0 .00 3:00 1 0. 39 0. 21 N/A 0.1749 0. 0988 29. 63 0. 00 0.00 0.00 0.00 0.00 29.63 1137.45 7.90 331.34 0 .29 0.00 0 .00 3:05 1 0.39 0.21 N/A 0.1749 0.0988 29.63 0.00 0. 00 0.00 0.00 0.00 29.63 1137 .45 7.90 353 .08 0 .31 0.00 0 .00 3:10 1. 1 0.43 0.21 N/A 0. 2138 0.1207 36.22 0.00 0.00 0.00 0.00 0.00 36.22 1137.45 7 .90 381.40 0.34 0 .00 0 .00 3:15 1. 1 0.43 0.21 N/A 0. 2138 0.1207 36.22 0.00 0.00 0.00 0.00 0.00 36.22 1137.45 7 .90 409.72 0 .36 0 .00 0 .00 3:20 1.1 0. 43 0. 21 N/A 0.2138 0.1207 36. 22 0. 00 0.00 0.00 0. 00 0.00 36.22 1137.45 7.90 438.05 0.39 0.00 0.00 3:25 1.2 0. 47 0. 21 N/A 0.2527 0.1427 42. 81 0. 00 0.00 0. 00 0. 00 0. 00 42.81 1137.45 7.90 472.96 0 .42 0.00 0 .00 3:30 1.3 0.51 0.21 N/A 0.2916 0. 1646 49.39 0.00 0. 00 0.00 0.00 0.00 49.39 1137.45 7.90 514.45 0.45 0.00 0.00 3:35 1. 4 0.54 0.21 N/A 0. 3305 0. 1866 55.98 0.00 0.00 0.00 0.00 0.00 55.98 1137 .45 7 .90 562 .53 0 .49 0 .00 0 .00 3:40 1. 4 0.54 0.21 N/A 0. 3305 0. 1866 55.98 0.00 0.00 0.00 0.00 0.00 55.98 1137.45 7 .90 610.61 0 .54 0 .00 0 .00 3:45 1.5 0.58 0.21 N/A 0.3693 0.2086 62.57 0.00 0. 00 0.00 0.00 0.00 62.57 1137.45 7.90 665.28 0 .58 0.00 0 .00 3:50 1.5 0. 58 0. 21 N/A 0. 3693 0. 2086 62. 57 0. 00 0.00 0.00 0. 00 0.00 62.57 1137.45 7.90 719.95 0 .63 0.00 0.00 3:55 1.6 0.62 0.21 N/A 0. 4082 0.2305 69.15 0.00 0. 00 0.00 0.00 0.00 69.15 1137.45 7.90 781.20 0 .69 0.00 0 .00 4:00 1. 6 0.62 0.21 N/A 0.4082 0.2305 69.15 0.00 0.00 0.00 0.00 0.00 69.15 1137.45 7.90 842.45 0.74 0 .00 0 .00 4:05 1. 7 0.66 0.21 N/A 0.4471 0.2525 75.74 0.00 0.00 0.00 0.00 0.00 75.74 1137.45 7.90 910.29 0 .80 0 .00 0 .00 4:10 1.8 0. 70 0. 21 N/A 0. 4860 0.2744 82. 33 0. 00 0.00 0.00 0. 00 0. 00 82.33 1137.45 7.90 984.72 0.87 0.00 0.00 4:15 1.9 0. 74 0. 21 N/A 0.5249 0.2964 88.91 0. 00 0.00 0. 00 0. 00 0. 00 88.91 1137.45 7.90 1065.73 0 .94 0.00 0 .00
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4:20 2 0.78 0.21 N/A 0.5637 0.3183 95.50 0.00 0.00 0.00 0.00 0.00 95.50 1137.45 7 .90 1153.33 1 .01 0 .00 0 .00 4:25 2 .1 0.82 0.21 N/A 0 .6026 0.3403 102 .08 0.00 0.00 0.00 0.00 0.00 102.08 1137.45 7.90 1247.51 1 .10 0 .00 0 .00 4:30 2.1 0 .82 0 .21 N/A 0.6026 0.3403 102 .08 0 .00 0.00 0.00 0 .00 0.00 102.08 1137 .45 7.90 1341.70 1.18 0.00 0.00 4:35 2.2 0 .86 0 .21 N/A 0.6415 0.3622 108 .67 0 .00 0.00 0 .00 0 .00 0 .00 108.67 1137.45 7.90 1442.47 1.27 0.00 0 .00 4:40 2.3 0.89 0.21 N/A 0.6804 0 .3842 115.26 0.00 0 .00 0.00 0.00 0.00 115.26 1137.45 7.90 1549 .83 1.36 0.00 0 .00 4:45 2. 4 0.93 0.21 N/A 0 .7193 0.4061 121.84 0.00 0.00 0.00 0.00 0.00 121.84 1137 .45 7 .90 1663 .77 1 .46 0 .00 0 .00 4:50 2. 4 0.93 0.21 N/A 0.7193 0 .4061 121.84 0.00 0.00 0.00 0.00 0.00 121.84 1137.45 7 .90 1777.72 1 .56 0 .00 0 .00 4:55 2.5 0.97 0 .21 N/A 0.7581 0.4281 128 .43 0 .00 0.00 0 .00 0 .00 0 .00 128.43 1137 .45 7.90 1898.25 1.67 0.00 0 .00 5:00 2. 6 1. 01 0 .21 N/A 0 .7970 0.4501 135 .02 0 .00 0.00 0.00 0 .00 0.00 135.02 1137.45 7.90 2025.36 1.78 0.00 0.00 5:05 3.1 1.21 0.21 N/A 0 .9914 0.5598 167.95 0.00 0 .00 0.00 0.00 0.00 167.95 1137 .45 7.90 2185 .41 1.92 0.00 0 .00 5:10 3.6 1.40 0.21 N/A 1.1858 0.6696 200.88 0.00 0.00 0.00 0.00 0.00 200.88 1137.45 7 .90 2378.39 2 .09 0 .00 0 .00 5:15 3. 9 1.52 0.21 N/A 1 .3025 0.7355 220.64 0.00 0.00 0.00 0.00 0.00 220.64 1137.45 7 .90 2591.13 2 .28 0 .00 0 .00 5:20 4.2 1. 63 0. 21 N/A 1.4191 0.8013 240 .40 0 .00 0.00 0.00 0 .00 0 .00 240.40 1137.45 7.90 2823.62 2.48 0.00 0.00 5:25 4.7 1. 83 0. 21 N/A 1.6135 0.9111 273 .33 0 .00 0.00 0 .00 0 .00 0 .00 273 .33 1137.45 7.90 3089.05 2.72 0.00 0 .00 5:30 5.6 2.18 0.21 N/A 1.9634 1.1087 332.60 0.00 0 .00 0.00 0.00 0.00 332.60 1137.45 7.90 3413 .76 3.00 0.00 0.00 5:35 1. 9 0.74 0.21 N/A 0.5249 0 .2964 88.91 0.00 0.00 0.00 0.00 0.00 88.91 1137 .45 7 .90 3494 .77 3 .07 0 .00 0 .00 5:40 0. 9 0.35 0.21 N/A 0.1361 0 .0768 23.05 0.00 0.00 0.00 0.00 0.00 23.05 1137.45 7.90 3509.92 3 .09 0 .00 0 .00 5:45 0.6 0. 23 0. 21 0.19 0.0467 0.0263 7.90 0 .00 0.00 0 .00 0 .00 0 .00 7.90 1137 .45 7.90 3509 .92 3 .09 0.00 0 .00 5:50 0.5 0. 19 0. 21 0.16 0.0389 0.0220 6 .59 0 .00 0.00 0.00 0 .00 0.00 6.59 1137 .45 7.90 3508.61 3.08 0.00 0 .00 5:55 0.3 0.12 0.21 0. 09 0.0233 0.0132 3.95 0.00 0 .00 0.00 0.00 0.00 3.95 1137 .45 7.90 3504 .66 3.08 0.00 0.00 6:00 0. 2 0.08 0.21 0.06 0. 0156 0.0088 2.63 0.00 0.00 0.00 0.00 0.00 2.63 1137.45 7 .90 3499.40 3 .08 0 .00 0.00 0 0.00 0.21 0.00 0. 0000 0.0000 0.00 0.00 0.00 0.00 0.00 0.00 0 .00 1137.45 7 .90 3491.50 3 .07 0 .00 0 .00 0 0. 00 0. 21 0. 00 0.0000 0.0000 0 .00 0 .00 0.00 0.00 0 .00 0.00 0.00 1137.45 7.90 3483.60 3.06 0.00 0.00 6:15 0 0. 00 0. 21 0.00 0.0000 0.0000 0.00 0 .00 0.00 0 .00 0 .00 0 .00 0 .00 1137.45 7.90 3475.70 3.06 0.00 0 .00 0 0.00 0.21 0.00 0.0000 0.0000 0.00 0.00 0 .00 0.00 0.00 0.00 0.00 1137.45 7.90 3467 .80 3.05 0.00 0.00 0 0.00 0.21 0.00 0. 0000 0. 0000 0.00 0.00 0.00 0.00 0.00 0.00 0 .00 1137 .45 7 .90 3459.90 3 .04 0 .00 0 .00 6:30 0 0.00 0.21 0.00 0. 0000 0. 0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1137.45 7 .90 3452.00 3 .03 0 .00 0 .00 0 0. 00 0. 21 0.00 0.0000 0.0000 0. 00 0.00 0.00 0 .00 0 .00 0 .00 0 .00 1137 .45 7.90 3444.10 3.03 0.00 0 .00 0 0. 00 0. 21 0.00 0.0000 0.0000 0. 00 0.00 0.00 0.00 0 .00 0 .00 0.00 1137.45 7.90 3436.21 3.02 0.00 0.00 6:45 0 0.00 0.21 0. 00 0.0000 0.0000 0.00 0.00 0 .00 0.00 0.00 0.00 0 .00 1137 .45 7.90 3428.31 3.01 0.00 0 .00 0 0.00 0.21 0.00 0. 0000 0. 0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1137.45 7 .90 3420.41 3.01 0 .00 0 .00 0 0.00 0.21 0.00 0. 0000 0. 0000 0.00 0.00 0.00 0.00 0.00 0.00 0 .00 1137.45 7 .90 3412 .51 3 .00 0 .00 0 .00 7:00 0 0. 00 0. 21 0. 00 0.0000 0.0000 0. 00 0. 00 0.00 0.00 0 .00 0.00 0.00 1137.45 7.90 3404.61 2 .99 0.00 0.00 Total volume (cf) 4066.81 Total Overflow (cf)
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24 Hour Storm in 15 minute increments Dry well Drywell Dry well Drywell Overflow Basin Basin Basin Time Pattem Storm Loss Rate Value Effective Flow Flow Outside Retention Period Storage Storage To Retention Period Storage Storage Overflo w Overflow % Rain (in/hr Max. Min. Rain (in/hr Rate (cfs) Vol. (cf) Input (cf) Area (sf) Perc . (cf, Vol . (cf) Depth (ft) Basin (cf) Area (sf) Perc . (cf) Vol. (cf) Depth (ft Vol . (cf) Rate (cfs) 0:15 0.2 0 .04 0 .38 0.03 0.0076 0.0043 3 .89 0 .00 0.00 0 .00 0 .00 0 .00 3 .88 1137.45 3.88 0.00 0 .00 0.00 0 .00 0:30 0.3 0.06 0.37 0.05 0 .0115 0.0065 5.83 0.00 0 .00 0.00 0.00 0.00 5.83 1137.45 5.83 0 .00 0 .00 0.00 0 .00 0:45 0. 3 0.06 0.37 0.05 0 .0115 0 .0065 5.83 0.00 0.00 0.00 0.00 0.00 5.83 1137 .45 5 .83 0.00 0 .00 0 .00 0 .00 1:00 0. 4 0.08 0.36 0.06 0 .0153 0 .0086 7.77 0.00 0.00 0.00 0.00 0.00 7.77 1137.45 7 .77 0.00 0 .00 0 .00 0 .00 1:15 0.3 0.06 0 .36 0.05 0.0115 0.0065 5 .83 0 .00 0.00 0 .00 0 .00 0 .00 5.83 1137 .45 5 .83 0.00 0 .00 0.00 0 .00 1:30 0.3 0. 06 0 .35 0.05 0 .0115 0 .0065 5 .83 0 .00 0.00 0.00 0 .00 0 .00 5.83 1137.45 5 .83 0.00 0 .00 0.00 0.00 1:45 0.3 0.06 0.35 0 .05 0.0115 0.0065 5.83 0.00 0 .00 0.00 0.00 0.00 5.83 1137 .45 5 .83 0 .00 0 .00 0.00 0 .00 2:00 0. 4 0.08 0.35 0.06 0.0153 0 .0086 7.77 0.00 0.00 0.00 0.00 0.00 7.77 1137.45 7 .77 0.00 0 .00 0 .00 0 .00 2:15 0. 4 0.08 0.34 0.06 0 .0153 0 .0086 7.77 0.00 0.00 0.00 0.00 0.00 7.77 1137.45 7 .77 0.00 0 .00 0 .00 0 .00 2:30 0.4 0. 08 0. 34 0.06 0.0153 0.0086 7 .77 0 .00 0.00 0.00 0 .00 0 .00 7.77 1137.45 7.77 0.00 0.00 0.00 0.00 2:45 0.5 0. 10 0. 33 0.08 0.0191 0.0108 9 .72 0 .00 0.00 0 .00 0 .00 0 .00 9.72 1137.45 9.72 0.00 0 .00 0.00 0 .00 3:00 0.5 0.10 0. 33 0.08 0.0191 0 .0108 9.72 0.00 0 .00 0.00 0.00 0.00 9.72 1137.45 9.72 0 .00 0.00 0.00 0.00 3:15 0. 5 0.10 0.32 0.08 0.0191 0.0108 9.72 0.00 0.00 0.00 0.00 0.00 9.72 1137 .45 9.72 0.00 0 .00 0 .00 0 .00 3:30 0. 5 0.10 0.32 0.08 0.0191 0 .0108 9.72 0.00 0.00 0.00 0.00 0.00 9.72 1137.45 9 .72 0.00 0 .00 0 .00 0 .00 3:45 0.5 0. 10 0.32 0.08 0.0191 0.0108 9 .72 0 .00 0.00 0 .00 0 .00 0 .00 9.72 1137 .45 9.72 0.00 0 .00 0.00 0 .00 4:00 0.6 0. 11 0. 31 0.09 0. 0229 0.0130 11 .66 0 .00 0.00 0.00 0 .00 0.00 11.66 1137 .45 11 .66 0.00 0.00 0.00 0 .00 4:15 0.6 0.11 0.31 0. 09 0.0229 0.0130 11.66 0.00 0 .00 0.00 0.00 0.00 11.66 1137 .45 11.66 0 .00 0.00 0.00 0.00 4:30 0. 7 0.13 0.30 0.11 0.0268 0.0151 13.60 0.00 0.00 0.00 0.00 0.00 13.60 1137.45 13.60 0.00 0 .00 0 .00 0.00 4:45 0. 7 0.13 0.30 0.11 0. 0268 0.0151 13.60 0.00 0.00 0.00 0.00 0.00 13 .60 1137.45 13 .60 0.00 0 .00 0 .00 0 .00 5:00 0.8 0. 15 0. 30 0. 12 0.0306 0.0173 15 .55 0 .00 0.00 0.00 0 .00 0.00 15.55 1137.45 15.55 0.00 0.00 0.00 0.00 5:15 0.6 0. 11 0. 29 0.09 0.0229 0.0130 11.66 0 .00 0.00 0 .00 0 .00 0 .00 11.66 1137.45 11.66 0.00 0 .00 0.00 0 .00 5:30 0.7 0.13 0.29 0.11 0. 0268 0. 0151 13.60 0.00 0 .00 0.00 0.00 0.00 13.60 1137.45 13 .60 0 .00 0 .00 0.00 0.00 5:45 0. 8 0.15 0.29 0.12 0. 0306 0.0173 15.55 0.00 0.00 0.00 0.00 0.00 15.55 1137 .45 15.55 0.00 0 .00 0 .00 0 .00 6:00 0. 8 0.15 0.28 0.12 0. 0306 0. 0173 15.55 0.00 0.00 0.00 0.00 0.00 15.55 1137.45 15 .55 0.00 0 .00 0 .00 0 .00 6:15 0.9 0. 17 0. 28 0.14 0.0344 0.0194 17. 49 0.00 0.00 0 .00 0 .00 0 .00 17.49 1137 .45 17.49 0.00 0 .00 0.00 0 .00 6:30 0.9 0. 17 0. 27 0.14 0. 0344 0. 0194 17. 49 0.00 0.00 0.00 0 .00 0 .00 17.49 1137.45 17 .49 0.00 0.00 0.00 0.00 6:45 1 0.19 0.27 0. 15 0.0382 0.0216 19.43 0.00 0 .00 0.00 0.00 0.00 19.43 1137 .45 19.43 0 .00 0 .00 0.00 0 .00 7:00 1 0.19 0.27 0.15 0.0382 0.0216 19.43 0.00 0.00 0.00 0.00 0.00 19.43 1137.45 19.43 0.00 0 .00 0 .00 0 .00 7:15 1 0.19 0.26 0.15 0. 0382 0.0216 19.43 0.00 0.00 0.00 0.00 0.00 19.43 1137.45 19.43 0.00 0 .00 0 .00 0 .00 7:30 1.1 0. 21 0. 26 0. 17 0.0421 0.0238 21. 38 0. 00 0.00 0.00 0 .00 0.00 21.38 1137.45 21.38 0.00 0.00 0.00 0.00 7:45 1.2 0. 23 0. 26 0.18 0.0459 0.0259 23. 32 0. 00 0.00 0 .00 0 .00 0 .00 23 .32 1137.45 23.32 0.00 0 .00 0.00 0 .00 8:00 1. 3 0.25 0.25 0.20 0.0497 0. 0281 25.26 0.00 0. 00 0.00 0.00 0.00 25.26 1137.45 23 .70 1.57 0 .00 0.00 0 .00 8:15 1. 5 0.29 0.25 0.23 0. 0574 0.0324 29.15 0.00 0.00 0.00 0.00 0.00 29.15 1137 .45 23 .70 7.02 0 .01 0 .00 0 .00 8:30 1. 5 0.29 0.25 0.23 0. 0574 0. 0324 29.15 0.00 0.00 0.00 0.00 0.00 29.15 1137.45 23 .70 12.47 0 .01 0 .00 0 .00 8:45 1.6 0. 31 0. 24 N/A 0.0639 0.0361 32.45 0. 00 0.00 0. 00 0.00 0 .00 32.45 1137 .45 23.70 21.23 0 .02 0.00 0 .00 9:00 1.7 0. 33 0. 24 N/A 0.0864 0. 0488 43. 90 0. 00 0.00 0.00 0.00 0.00 43.90 1137.45 23 .70 41.43 0 .04 0.00 0 .00 9:15 1.9 0.36 0.24 N/A 0.1280 0.0723 65.06 0.00 0. 00 0.00 0.00 0.00 65.06 1137 .45 23.70 82 .80 0 .07 0.00 0 .00 9:30 2 0.38 0.23 N/A 0.1505 0.0850 76.48 0.00 0.00 0.00 0.00 0.00 76.48 1137.45 23.70 135.58 0.12 0 .00 0 .00 9:45 2. 1 0.40 0.23 N/A 0. 1729 0.0977 87.89 0.00 0.00 0.00 0.00 0.00 87.89 1137.45 23 .70 199.77 0 .18 0 .00 0 .00 10:00 2.2 0. 42 0. 23 N/A 0.1954 0.1103 99. 28 0. 00 0.00 0.00 0. 00 0.00 99.28 1137.45 23.70 275.35 0.24 0.00 0.00 10:15 1.5 0. 29 0. 22 N/A 0.0648 0.0366 32.92 0. 00 0.00 0. 00 0. 00 0. 00 32.92 1137.45 23.70 284.57 0 .25 0.00 0 .00 10:30 1.5 0.29 0.22 N/A 0.0680 0.0384 34.56 0.00 0. 00 0.00 0.00 0.00 34.56 1137.45 23 .70 295.43 0 .26 0.00 0.00 10:45 2 0.38 0.22 N/A 0. 1668 0. 0942 84.76 0.00 0.00 0.00 0.00 0.00 84.76 1137 .45 23 .70 356 .50 0 .31 0 .00 0 .00 11:00 2 0.38 0.21 N/A 0.1700 0. 0960 86.37 0.00 0.00 0.00 0.00 0.00 86.37 1137.45 23 .70 419.17 0 .37 0 .00 0 .00 11:15 1.9 0.36 0.21 N/A 0.1540 0.0869 78.24 0.00 0. 00 0.00 0.00 0.00 78.24 1137.45 23.70 473 .72 0 .42 0.00 0 .00 11:30 1. 9 0. 36 0. 21 N/A 0.1571 0.0887 79. 82 0. 00 0.00 0.00 0. 00 0.00 79.82 1137.45 23 .70 529.84 0.47 0.00 0.00 11:45 1.7 0.33 0.20 N/A 0.1219 0.0688 61.94 0.00 0. 00 0.00 0.00 0.00 61.94 1137.45 23.70 568 .08 0 .50 0.00 0 .00 12:00 1. 8 0.34 0.20 N/A 0.1440 0.0813 73.19 0.00 0.00 0.00 0.00 0.00 73.19 1137.45 23.70 617.58 0.54 0 .00 0 .00 12:15 2. 5 0.48 0.20 N/A 0. 2809 0.1586 142.73 0.00 0.00 0.00 0.00 0.00 142.73 1137.45 23.70 736.61 0 .65 0 .00 0 .00 12:30 2.6 0. 50 0. 19 N/A 0.3029 0.1711 153. 95 0. 00 0.00 0.00 0. 00 0.00 153.95 1137.45 23.70 866 .87 0.76 0.00 0.00 12:45 2.8 0. 54 0. 19 N/A 0.3441 0.1943 174. 87 0. 00 0.00 0. 00 0. 00 0. 00 174.87 1137.45 23.70 1018.04 0 .90 0.00 0 .00
24 of 26
13:00 2.9 0.55 0.19 N/A 0.3661 0.2067 186.05 0.00 0.00 0.00 0.00 0.00 186.05 1137.45 23.70 1180.40 1 .04 0 .00 0 .00 13:15 3 .4 0.65 0.19 N/A 0.4646 0.2623 236.09 0.00 0.00 0.00 0.00 0.00 236.09 1137.45 23 .70 1392 .79 1 .22 0 .00 0 .00 13:30 3.4 0 .65 0 .18 N/A 0 .4674 0.2639 237 .52 0 .00 0.00 0.00 0 .00 0.00 237.52 1137.45 23.70 1606.61 1.41 0.00 0.00 13:45 2.3 0 .44 0 .18 N/A 0.2598 0.1467 132 .05 0 .00 0.00 0 .00 0 .00 0 .00 132.05 1137.45 23.70 1714 .96 1.51 0.00 0 .00 14:00 2.3 0.44 0.18 N/A 0.2626 0 .1483 133.44 0.00 0 .00 0.00 0.00 0.00 133.44 1137.45 23 .70 1824 .70 1.60 0.00 0 .00 14:15 2. 7 0.52 0.17 N/A 0 .3418 0.1930 173.68 0.00 0.00 0.00 0.00 0.00 173 .68 1137 .45 23 .70 1974.68 1 .74 0 .00 0 .00 14:30 2. 6 0.50 0.17 N/A 0 .3253 0 .1837 165.32 0.00 0.00 0.00 0.00 0.00 165.32 1137.45 23 .70 2116.30 1 .86 0 .00 0 .00 14:45 2.6 0.50 0 .17 N/A 0.3279 0.1852 166 .65 0 .00 0.00 0 .00 0 .00 0 .00 166.65 1137 .45 23.70 2259.26 1.99 0.00 0 .00 15:00 2. 5 0. 48 0 .17 N/A 0 .3114 0 .1758 158 .25 0 .00 0.00 0.00 0 .00 0.00 158.25 1137.45 23 .70 2393.81 2.10 0.00 0.00 15:15 2.4 0.46 0.16 N/A 0.2948 0.1665 149.83 0.00 0 .00 0.00 0.00 0.00 149.83 1137 .45 23.70 2519 .95 2.22 0.00 0 .00 15:30 2.3 0.44 0.16 N/A 0 .2782 0.1571 141.39 0.00 0.00 0.00 0.00 0.00 141.39 1137.45 23 .70 2637.64 2 .32 0 .00 0 .00 15:45 1. 9 0.36 0.16 N/A 0 .2042 0.1153 103.78 0.00 0.00 0.00 0.00 0.00 103.78 1137.45 23.70 2717.72 2 .39 0 .00 0 .00 16:00 1.9 0. 36 0. 16 N/A 0.2066 0.1167 105 .01 0 .00 0.00 0.00 0 .00 0.00 105.01 1137.45 23.70 2799.03 2 .46 0.00 0.00 16:15 0.4 0. 08 0. 15 0.06 0.0153 0.0086 7 .77 0 .00 0.00 0 .00 0 .00 0 .00 7.77 1137.45 23.70 2783.11 2.45 0.00 0 .00 16:30 0.4 0.08 0.15 0.06 0.0153 0.0086 7.77 0.00 0 .00 0.00 0.00 0.00 7.77 1137.45 23 .70 2767.19 2.43 0.00 0.00 16:45 0. 3 0.06 0.15 0.05 0.0115 0 .0065 5.83 0.00 0.00 0.00 0.00 0.00 5.83 1137 .45 23 .70 2749 .32 2 .42 0 .00 0 .00 17:00 0. 3 0.06 0.15 0.05 0.0115 0 .0065 5.83 0.00 0.00 0.00 0.00 0.00 5.83 1137.45 23 .70 2731.45 2.40 0 .00 0 .00 17:15 0.5 0. 10 0. 15 0.08 0.0191 0.0108 9 .72 0 .00 0.00 0 .00 0 .00 0 .00 9.72 1137 .45 23.70 2717.47 2.39 0.00 0 .00 17:30 0.5 0. 10 0. 14 0.08 0. 0191 0.0108 9 .72 0 .00 0.00 0.00 0 .00 0.00 9.72 1137.45 23 .70 2703.49 2 .38 0.00 0 .00 17:45 0.5 0.10 0.14 0. 08 0.0191 0.0108 9.72 0.00 0 .00 0.00 0.00 0.00 9.72 1137 .45 23.70 2689.51 2.36 0.00 0.00 18:00 0. 4 0.08 0.14 0.06 0. 0153 0.0086 7.77 0.00 0.00 0.00 0.00 0.00 7.77 1137.45 23.70 2673.59 2.35 0 .00 0.00 18:15 0. 4 0.08 0.14 0.06 0. 0153 0.0086 7.77 0.00 0.00 0.00 0.00 0.00 7.77 1137.45 23 .70 2657.67 2 .34 0 .00 0 .00 18:30 0.4 0. 08 0. 13 0. 06 0.0153 0.0086 7 .77 0 .00 0.00 0.00 0 .00 0.00 7.77 1137.45 23.70 2641.74 2 .32 0.00 0.00 18:45 0.3 0. 06 0. 13 0.05 0.0115 0.0065 5.83 0 .00 0.00 0 .00 0 .00 0 .00 5.83 1137.45 23.70 2623.88 2.31 0.00 0 .00 19:00 0.2 0.04 0.13 0.03 0. 0076 0. 0043 3.89 0.00 0 .00 0.00 0.00 0.00 3.89 1137.45 23 .70 2604 .07 2.29 0.00 0.00 19:15 0. 3 0.06 0.13 0.05 0. 0115 0.0065 5.83 0.00 0.00 0.00 0.00 0.00 5.83 1137 .45 23 .70 2586 .20 2 .27 0 .00 0 .00 19:30 0. 4 0.08 0.13 0.06 0. 0153 0. 0086 7.77 0.00 0.00 0.00 0.00 0.00 7.77 1137.45 23 .70 2570.28 2 .26 0 .00 0 .00 19:45 0.3 0. 06 0. 13 0.05 0.0115 0.0065 5. 83 0.00 0.00 0 .00 0 .00 0 .00 5.83 1137 .45 23.70 2552.41 2.24 0.00 0 .00 20:00 0.2 0. 04 0. 12 0.03 0. 0076 0.0043 3. 89 0.00 0.00 0.00 0 .00 0 .00 3.89 1137.45 23 .70 2532.60 2.23 0.00 0.00 20:15 0.3 0.06 0.12 0. 05 0.0115 0.0065 5.83 0.00 0 .00 0.00 0.00 0.00 5.83 1137 .45 23.70 2514 .73 2.21 0.00 0 .00 20:30 0.3 0.06 0.12 0.05 0.0115 0. 0065 5.83 0.00 0.00 0.00 0.00 0.00 5.83 1137.45 23.70 2496.86 2 .20 0 .00 0 .00 20:45 0.3 0.06 0.12 0.05 0. 0115 0. 0065 5.83 0.00 0.00 0.00 0.00 0.00 5.83 1137.45 23 .70 2479.00 2 .18 0 .00 0 .00 21:00 0.2 0. 04 0. 12 0. 03 0.0076 0.0043 3. 89 0. 00 0.00 0.00 0 .00 0.00 3.89 1137.45 23.70 2459 .19 2.16 0.00 0.00 21:15 0.3 0. 06 0. 12 0.05 0.0115 0.0065 5. 83 0. 00 0.00 0 .00 0 .00 0 .00 5.83 1137.45 23.70 2441.32 2.15 0.00 0 .00 21:30 0. 2 0.04 0.12 0.03 0. 0076 0. 0043 3.89 0.00 0. 00 0.00 0.00 0.00 3.89 1137.45 23 .70 2421 .51 2.13 0.00 0 .00 21:45 0.3 0.06 0.11 0.05 0. 0115 0. 0065 5.83 0.00 0.00 0.00 0.00 0.00 5.83 1137 .45 23 .70 2403.64 2 .11 0 .00 0 .00 22:00 0. 2 0.04 0.11 0.03 0. 0076 0. 0043 3.89 0.00 0.00 0.00 0.00 0.00 3.89 1137.45 23 .70 2383.83 2.10 0 .00 0 .00 22:15 0.3 0. 06 0. 11 0.05 0.0115 0.0065 5. 83 0. 00 0.00 0. 00 0.00 0 .00 5.83 1137 .45 23.70 2365.97 2.08 0.00 0 .00 22:30 0. 2 0. 04 0. 11 0.03 0.0076 0. 0043 3. 89 0. 00 0.00 0.00 0.00 0.00 3.89 1137.45 23 .70 2346.16 2 .06 0.00 0 .00 22:45 0.2 0.04 0.11 0. 03 0.0076 0.0043 3.89 0.00 0. 00 0.00 0.00 0.00 3 .89 1137 .45 23.70 2326.35 2.05 0.00 0 .00 23:00 0.2 0.04 0.11 0.03 0.0076 0.0043 3.89 0.00 0.00 0.00 0.00 0.00 3 .89 1137.45 23.70 2306.54 2 .03 0 .00 0 .00 23:15 0.2 0.04 0.11 0.03 0. 0076 0. 0043 3.89 0.00 0.00 0.00 0.00 0.00 3 .89 1137.45 23 .70 2286 .73 2 .01 0 .00 0 .00 23:30 0.2 0. 04 0. 11 0. 03 0.0076 0.0043 3. 89 0. 00 0.00 0.00 0. 00 0.00 3.89 1137.45 23.70 2266 .92 1.99 0.00 0.00 23:45 0.2 0. 04 0. 11 0.03 0.0076 0.0043 3. 89 0. 00 0.00 0. 00 0. 00 0. 00 3.89 1137.45 23.70 2247.11 1.98 0.00 0 .00 24:00 0.2 0.04 0.11 0.03 0.0076 0.0043 3.89 0.00 0. 00 0.00 0.00 0.00 3.89 1137.45 23 .70 2227 .30 1.96 0.00 0 .00 0 0.00 0.11 0.00 0. 0000 0. 0000 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1137 .45 23.70 2203.60 1 .94 0 .00 0 .00 Total volume (cf) 4140. 72 Total Overflow (cf)
APPENDIX D
USDA WEB SOIL SURVEY REPORT
www.mbakerintl.com
75-410 Gerald Ford Drive., Suite 1001 Palm Desert, CA 92211 Office: 760-346-7481
11-679
Hydrologic Soil Group —Riverside County, Coachella Valley Area, California (Skilled Nursing Facility)
33° 47 20"N
33° 47 13"N
S
N
AN
555070
Map Scale: 1:1,140 if printed on A portrait (8.5" x 11") sheet.
Meters
0 15 30 60 90
Feet
0 50 100 200 300
Map projection: Web Mercator Comer coordinates: WGS84 Edge tics: UTM Zone 11N WGS84 555110
555110
555130
555150
11- 680
USDA Natural Resources Web Soil Survey
Conservation Service National Cooperative Soil Survey