ams associates, inc. • 801 Ygnacio Valley Rd., Suite 220 • Walnut Creek, CA, 94596 • Phone 925.943.2777 • Fax 925.943.2778
ON-SITE
HYDROLOGY / HYDRAULIC STUDY
for
Mixed-Use Building
Humboldt Street & Jefferson Street
Yountville, CA 94599
Prepared:
January 25
th, 2024
by
ams associates, inc.
801 Ygnacio Valley Road, Suite 220
Walnut Creek, CA 94596
(925) 943-2777
ams Project No. 22-2640
Prepared By:
Farhad Iranitalab
R.C.E. 33142
On-Site Hydrology / Hydraulic Study
Mixed-Use Building
Humboldt Street & Jefferson Street
Yountville, CA 94599
January 25th, 2024
TABLE OF CONTENTS
I. NARRATIVE
Introduction.............................................................................................................................. 1 Vicinity Map ............................................................................................................................ 1 Methodology............................................................................................................................ 1 Existing Site Conditions .......................................................................................................... 2 Proposed Conditions................................................................................................................ 2 Summary & Conclusion........................................................................................................... 2 II. EXHIBITS
• Exhibit A – NOAA Atlas 14, Precipitation Data
• Exhibit B – Pre-Development Hydrology Map
• Exhibit C – Post-Development Hydrology Map
• Exhibit D – Existing Condition HydroCAD Calculations
• Exhibit E – Proposed Condition HydroCAD Calculations
• Exhibit ‘F’ – Horizontal Control Plan
• Exhibit ‘G’ – Preliminary Grading Plan
• Exhibit ‘H’ – Preliminary Utility Plan
On-Site Hydrology / Hydraulic Study
Mixed-Use Building
Humboldt Street & Jefferson Street
Yountville, CA 94599
January 25th, 2024
I. NARRATIVE
On-Site Hydrology / Hydraulic Study 1
Mixed-Use Building
Humboldt Street & Jefferson Street
Yountville, CA 94599
January 25th, 2024
Introduction
The site is located at Humboldt Street & Jefferson Street in the City of Yountville, Napa County, State of California.
The proposed project consists of one Mixed-Use Building, Parking Lot and Sidewalks. Sidewalks will be constructed along Jefferson Street and Humboldt Street. This existing Site consists of approximately 0.249± acres of undeveloped land.
Vicinity Map
Figure 1 Vicinity Map
Methodology
The hydrological analysis is based on the Rational Method. Calculations were performed using HydroCAD 10.10. The precipitation data was obtained from NOAA atlas 14. Please refer to Exhibit ‘A’ for details.
Input values were used to generate peak flows for both the existing and proposed conditions. The peak runoff flowrate (Q) and storm volumes were calculated for the 100-yr. Results of post-project hydrology are used to address the on-site impacts of the Project.
On-Site Hydrology / Hydraulic Study 2
Mixed-Use Building
Humboldt Street & Jefferson Street
Yountville, CA 94599
January 25th, 2024
Existing Site Conditions
The 0.249± acre undeveloped Parcel sloping 1.3% from west to East towards Humboldt Street.
There are no Stormwater Drainage Structures or Municipal Storm Drain on Site. Soils are Coombs Gravelly Loam, Hydrologic Soil Group “C”.
Please refer to Exhibit ‘B’ for the existing Drainage Map.
Proposed Conditions
The Site only has one drainage area. There is a planned Bio-Retention Facility that will be built for the Property, located at East side of the Property. The Bio-Retention Facility has 881 cf available storage.
Please refer to Exhibit ‘C’ for the Post-Development Drainage Map.
Summary & Conclusion
Following is a summary of hydrologic results from this Report, see Exhibit ‘D’ and ‘E’ for the HydroCAD results including Stage-storage-discharge relationship for Bio-Retention Facilities and ‘B’ and ‘C’ for Hydrology Map.
Table 1: Hydrology Summary
Storm
Event
Pre-development
Condition (cfs)
Pre-development
Volume (cu-ft)
100-yr 0.23 141
While the proposed Project increases impervious surfaces. The increases in runoff will be detained by the proposed Bio-Retention Facility.
The Bio-Retention Basin capacity is 881 ft3 which is less than 395 ft3 of the Post-Development volume. Any Run-off beyond the 881 ft3 will drain to the City’s Right-of-Way via two 3” PVC Pipes through the Curb.
Please refer to Exhibit ‘E’ HydroCAD Report for Bio-Retention Facility Stage-Area-Storage.
Storm
Event
Post-Development
Condition (cfs)
Post-Development
Volume (cu-ft)
100-yr 0 395
On-Site Hydrology / Hydraulic Study
Mixed-Use Building
Humboldt Street & Jefferson Street
Yountville, CA 94599
January 25th, 2024
II. Exhibits
• Exhibit ‘A’ – NOAA Atlas 14, Precipitation Data
• Exhibit ‘B’ – Pre-Development Hydrology Map
• Exhibit ‘C’ – Post-Development Hydrology Map
• Exhibit ‘D’ – Existing Condition HydroCAD Calculations • Exhibit ‘E’ – Proposed Condition HydroCAD Calculations • Exhibit ‘F’ – Horizontal Control Plan
• Exhibit ‘G’ – Preliminary Grading Plan
• Exhibit ‘H’ – Preliminary Utility Plan
On-Site Hydrology / Hydraulic Study
Mixed-Use Building
Humboldt Street & Jefferson Street
Yountville, CA 94599
January 25th, 2024
Exhibit ‘A’
NOAA Atlas 14, Precipitation Data
NOAA Atlas 14, Volume 6, Version 2
Location name: Yountville, California, USA*
Latitude: 38.4033°, Longitude: -122.3633°
Elevation: 110 ft**
* source: ESRI Maps
** source: USGS
POINT PRECIPITATION FREQUENCY ESTIMATES
Sanja Perica, Sarah Dietz, Sarah Heim, Lillian Hiner, Kazungu Maitaria, Deborah Martin, Sandra Pavlovic, Ishani Roy, Carl Trypaluk, Dale Unruh, Fenglin Yan, Michael Yekta, Tan Zhao, Geoffrey Bonnin, Daniel Brewer, Li-Chuan Chen, Tye Parzybok, John Yarchoan NOAA, National Weather Service, Silver Spring, Maryland PF_tabular | PF_graphical | Maps_&_aerials
PF tabular
PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches) 1 Duration
Average recurrence interval (years)
1 2 5 10 25 50 100 200 500 1000
5-min 0.138
(0.123‑0.156)
0.169
(0.150‑0.192)
0.210
(0.186‑0.240)
0.244
(0.214‑0.281)
0.291
(0.246‑0.348)
0.327
(0.269‑0.400)
0.364
(0.292‑0.459)
0.402
(0.312‑0.523)
0.455
(0.337‑0.621)
0.496
(0.353‑0.704)
10-min 0.197
(0.176‑0.224)
0.242
(0.215‑0.275)
0.302
(0.267‑0.344)
0.350
(0.307‑0.403)
0.417
(0.352‑0.499)
0.468
(0.386‑0.574)
0.522
(0.418‑0.657)
0.577
(0.448‑0.750)
0.652
(0.483‑0.889)
0.711
(0.507‑1.01)
15-min 0.239
(0.212‑0.271)
0.293
(0.261‑0.333)
0.365
(0.323‑0.416)
0.423
(0.372‑0.487)
0.504
(0.426‑0.603)
0.567
(0.467‑0.694)
0.631
(0.506‑0.795)
0.697
(0.541‑0.907)
0.789
(0.584‑1.08)
0.860
(0.613‑1.22)
30-min 0.342
(0.304‑0.388)
0.419
(0.373‑0.477)
0.522
(0.462‑0.595)
0.606
(0.532‑0.697)
0.721
(0.609‑0.863)
0.811
(0.668‑0.993)
0.902
(0.723‑1.14)
0.998
(0.775‑1.30)
1.13 (0.836‑1.54)
1.23 (0.877‑1.74)
60-min 0.496
(0.442‑0.563)
0.609
(0.541‑0.692)
0.758
(0.672‑0.864)
0.880
(0.772‑1.01)
1.05 (0.885‑1.25)
1.18 (0.971‑1.44)
1.31 (1.05‑1.65)
1.45 (1.12‑1.89)
1.64 (1.21‑2.24)
1.79 (1.27‑2.54)
2-hr 0.754
(0.671‑0.855)
0.923
(0.820‑1.05)
1.14 (1.01‑1.30)
1.32 (1.16‑1.52)
1.56 (1.32‑1.87)
1.75 (1.44‑2.14)
1.93 (1.55‑2.43)
2.12 (1.65‑2.76)
2.37 (1.76‑3.24)
2.57 (1.83‑3.64)
3-hr 0.966
(0.860‑1.10)
1.18 (1.05‑1.34)
1.46 (1.30‑1.67)
1.69 (1.48‑1.94)
1.99 (1.68‑2.38)
2.22 (1.83‑2.72)
2.45 (1.96‑3.09)
2.69 (2.08‑3.49)
3.00 (2.22‑4.09)
3.23 (2.30‑4.59)
6-hr 1.44
(1.28‑1.64)
1.77 (1.58‑2.01)
2.19 (1.94‑2.50)
2.53 (2.22‑2.91)
2.98 (2.52‑3.57)
3.32 (2.74‑4.07)
3.66 (2.93‑4.61)
4.00 (3.10‑5.20)
4.45 (3.29‑6.06)
4.78 (3.41‑6.78)
12-hr 2.00
(1.78‑2.28)
2.51 (2.23‑2.85)
3.15 (2.79‑3.59)
3.66 (3.21‑4.21)
4.34 (3.66‑5.19)
4.84 (3.99‑5.93)
5.34 (4.28‑6.74)
5.85 (4.54‑7.61)
6.52 (4.82‑8.89)
7.01 (5.00‑9.95)
24-hr 2.75
(2.47‑3.12)
3.51 (3.15‑3.99)
4.48 (4.02‑5.10)
5.25 (4.68‑6.02)
6.27 (5.43‑7.38)
7.03 (5.99‑8.42)
7.78 (6.50‑9.51)
8.54 (6.96‑10.7)
9.53 (7.51‑12.3)
10.3 (7.86‑13.7)
2-day 3.58
(3.22‑4.07)
4.60 (4.13‑5.22)
5.89 (5.28‑6.70)
6.91 (6.16‑7.92)
8.26 (7.16‑9.73)
9.28 (7.90‑11.1)
10.3 (8.58‑12.6)
11.3 (9.20‑14.1)
12.6 (9.94‑16.3)
13.6 (10.4‑18.2)
3-day 4.18
(3.76‑4.74)
5.36 (4.82‑6.08)
6.87 (6.16‑7.82)
8.06 (7.18‑9.24)
9.64 (8.36‑11.4)
10.8 (9.22‑13.0)
12.0 (10.0‑14.7)
13.2 (10.7‑16.5)
14.7 (11.6‑19.1)
15.9 (12.2‑21.2)
4-day 4.64
(4.18‑5.27)
5.96 (5.36‑6.77)
7.65 (6.86‑8.70)
8.98 (8.00‑10.3)
10.7 (9.30‑12.6)
12.0 (10.2‑14.4)
13.3 (11.1‑16.3)
14.6 (11.9‑18.3)
16.3 (12.8‑21.1)
17.6 (13.4‑23.4)
7-day 5.71
(5.14‑6.48)
7.36 (6.61‑8.36)
9.43 (8.45‑10.7)
11.1 (9.84‑12.7)
13.2 (11.4‑15.5)
14.7 (12.5‑17.6)
16.2 (13.6‑19.8)
17.7 (14.5‑22.2)
19.7 (15.5‑25.5)
21.1 (16.2‑28.2)
10-day 6.48
(5.83‑7.35)
8.36 (7.51‑9.49)
10.7 (9.60‑12.2)
12.5 (11.2‑14.4)
14.9 (12.9‑17.5)
16.6 (14.2‑19.9)
18.3 (15.3‑22.4)
19.9 (16.2‑24.9)
22.0 (17.4‑28.5)
23.6 (18.0‑31.4)
20-day 8.46
(7.61‑9.60)
10.9 (9.84‑12.4)
14.0 (12.6‑15.9)
16.3 (14.6‑18.7)
19.3 (16.8‑22.8)
21.5 (18.3‑25.7)
23.5 (19.6‑28.8)
25.5 (20.8‑31.9)
28.0 (22.1‑36.3)
29.8 (22.8‑39.8)
30-day 10.2
(9.16‑11.6)
13.1 (11.8‑14.9)
16.8 (15.0‑19.1)
19.5 (17.4‑22.3)
23.0 (19.9‑27.0)
25.4 (21.7‑30.5)
27.8 (23.2‑34.0)
30.0 (24.5‑37.6)
32.8 (25.9‑42.5)
34.8 (26.6‑46.4)
45-day 12.5
(11.2‑14.1)
16.0 (14.3‑18.1)
20.2 (18.1‑23.0)
23.4 (20.9‑26.8)
27.4 (23.8‑32.3)
30.3 (25.8‑36.3)
32.9 (27.5‑40.3)
35.5 (28.9‑44.4)
38.6 (30.4‑50.0)
40.8 (31.2‑54.5)
60-day 14.9
(13.4‑16.9)
18.9 (17.0‑21.5)
23.8 (21.3‑27.0)
27.4 (24.4‑31.4)
31.9 (27.6‑37.6)
35.1 (29.9‑42.0)
38.1 (31.8‑46.5)
40.9 (33.3‑51.2)
44.4 (34.9‑57.5)
46.8 (35.8‑62.4)
1 Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS).
Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper bounds are not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values.
Please refer to NOAA Atlas 14 document for more information.
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On-Site Hydrology / Hydraulic Study
Mixed-Use Building
Humboldt Street & Jefferson Street
Yountville, CA 94599
January 25th, 2024
Exhibit ‘B’
Pre-Development Hydrology Map
LOT 1
[14 M 75]
LOT 2
[14 M 75]
LOT 3
[14 M 75]
LOT 4
[14 M 75]
PARCEL 3
[19 PM 77]
PARCEL 2
[19 PM 77]
PARCEL 1
[19 PM 77]
HUMBOLDT STREET
JEFFERSON STREET
0.133± ACRES 0.116± ACRES
DRAINAGE EASEMENT
[14 M 75] NON-ACCESS [14 M 75]
WASHINGTON STREET
Know what'sbelow. Callbefore you dig.
R
On-Site Hydrology / Hydraulic Study
Mixed-Use Building
Humboldt Street & Jefferson Street
Yountville, CA 94599
January 25th, 2024
Exhibit ‘C’
Post-Development Hydrology Map
T
SHED
SSCO
GRAVEL DRIVEWAY
EB EV EB
LOT 3
[14 M 75]
LOT 4
[14 M 75]
PARCEL 3
[19 PM 77]
PARCEL 2
[19 PM 77]
PARCEL 1
[19 PM 77]
HUMBOLDT STREET
JEFFERSON STREET
DRAINAGE EASEMENT
[14 M 75] NON-ACCESS [14 M 75]
WASHINGTON STREET
BIKE
USPS
EV
ART
11 10
9 8
7 6
5 4
3 2
1 EV
BIKE
USPS
EV
DWTR
DWTR
ART
Know what'sbelow. Callbefore you dig.
R
On-Site Hydrology / Hydraulic Study
Mixed-Use Building
Humboldt Street & Jefferson Street
Yountville, CA 94599
January 25th, 2024
Exhibit ‘D’
Existing Condition HydroCAD Calculations
1S
DA-1
PRE_DEVELOPMENT
Routing Diagram for 2640 Pre-development
Prepared by ams associates, inc, Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link
2640 Pre-development
Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes)
Area
(sq-ft)
C Description
(subcatchment-numbers)
10,843 0.30 (1S)
10,843 0.30 TOTAL AREA
2640 Pre-development
Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Page 3 Soil Listing (all nodes)
Area
(sq-ft)
Soil
Group
Subcatchment
Numbers
0 HSG A
0 HSG B
0 HSG C
0 HSG D
10,843 Other 1S
10,843 TOTAL AREA
2640 Pre-development
Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Page 4 Ground Covers (all nodes)
HSG-A
(sq-ft)
HSG-B
(sq-ft)
HSG-C
(sq-ft)
HSG-D
(sq-ft)
Other
(sq-ft)
Total
(sq-ft)
Ground
Cover
Subcatchment
Numbers
0 0 0 0 10,843 10,843 1S
0 0 0 0 10,843 10,843 TOTAL AREA
2640 Pre-development CA-Yountville 2640 100-yr Duration=10 min, Inten=3.13 in/hr Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Page 5 Time span=0.00-1.00 hrs, dt=0.01 hrs, 101 points
Runoff by Rational method, Rise/Fall=1.0/1.0 xTc
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1S: DA-1 PRE_DEVELOPMENT Runoff Area=10,843 sf 0.00% Impervious Runoff Depth=0.16" Tc=10.0 min C=0.30 Runoff=0.23 cfs 141 cf
Total Runoff Area = 10,843 sf Runoff Volume = 141 cf Average Runoff Depth = 0.16" 100.00% Pervious = 10,843 sf 0.00% Impervious = 0 sf
2640 Pre-development CA-Yountville 2640 100-yr Duration=10 min, Inten=3.13 in/hr Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Page 6 Summary for Subcatchment 1S: DA-1 PRE_DEVELOPMENT
Runoff = 0.23 cfs @ 0.17 hrs, Volume= 141 cf, Depth= 0.16" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-1.00 hrs, dt= 0.01 hrs CA-Yountville 2640 100-yr Duration=10 min, Inten=3.13 in/hr Area (sf) C Description
10,843 0.30
10,843 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
10.0 Direct Entry,
Subcatchment 1S: DA-1 PRE_DEVELOPMENT
Runoff
Hydrograph
Time (hours)
0 1 Flow (cfs)
0.25 0.24
0.23 0.22
0.21 0.2
0.19 0.18
0.17 0.16
0.15 0.14
0.13 0.12
0.11 0.1
0.09 0.08
0.07 0.06
0.05 0.04
0.03 0.02
0.01 0
CA-Yountville 2640 100-yr
Duration=10 min,
Inten=3.13 in/hr
Runoff Area=10,843 sf
Runoff Volume=141 cf
Runoff Depth=0.16"
Tc=10.0 min
C=0.30
0.23 cfs
2640 Pre-development CA-Yountville 2640 100-yr Duration=10 min, Inten=3.13 in/hr Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Page 7 Hydrograph for Subcatchment 1S: DA-1 PRE_DEVELOPMENT
Time
(hours)
Runoff
(cfs)
0.00 0.00
0.01 0.01
0.02 0.03
0.03 0.04
0.04 0.06
0.05 0.07
0.06 0.08
0.07 0.10
0.08 0.11
0.09 0.13
0.10 0.14
0.11 0.16
0.12 0.17
0.13 0.18
0.14 0.20
0.15 0.21
0.16 0.23
0.17 0.23
0.18 0.22
0.19 0.20
0.20 0.19
0.21 0.17
0.22 0.16
0.23 0.15
0.24 0.13
0.25 0.12
0.26 0.10
0.27 0.09
0.28 0.08
0.29 0.06
0.30 0.05
0.31 0.03
0.32 0.02
0.33 0.00
0.34 0.00
0.35 0.00
0.36 0.00
0.37 0.00
0.38 0.00
0.39 0.00
0.40 0.00
0.41 0.00
0.42 0.00
0.43 0.00
0.44 0.00
0.45 0.00
0.46 0.00
0.47 0.00
0.48 0.00
0.49 0.00
0.50 0.00
0.51 0.00
0.52 0.00
0.53 0.00
0.54 0.00
0.55 0.00
0.56 0.00
0.57 0.00
0.58 0.00
0.59 0.00
0.60 0.00
0.61 0.00
0.62 0.00
0.63 0.00
0.64 0.00
0.65 0.00
Time
(hours)
Runoff
(cfs)
0.66 0.00
0.67 0.00
0.68 0.00
0.69 0.00
0.70 0.00
0.71 0.00
0.72 0.00
0.73 0.00
0.74 0.00
0.75 0.00
0.76 0.00
0.77 0.00
0.78 0.00
0.79 0.00
0.80 0.00
0.81 0.00
0.82 0.00
0.83 0.00
0.84 0.00
0.85 0.00
0.86 0.00
0.87 0.00
0.88 0.00
0.89 0.00
0.90 0.00
0.91 0.00
0.92 0.00
0.93 0.00
0.94 0.00
0.95 0.00
0.96 0.00
0.97 0.00
0.98 0.00
0.99 0.00
1.00 0.00
2640 Pre-development Table of Contents
Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC
TABLE OF CONTENTS
Project Reports
1 Routing Diagram
2 Area Listing (all nodes)
3 Soil Listing (all nodes)
4 Ground Covers (all nodes)
100-yr Event
5 Node Listing
6 Subcat 1S: DA-1 PRE_DEVELOPMENT
On-Site Hydrology / Hydraulic Study
Mixed-Use Building
Humboldt Street & Jefferson Street
Yountville, CA 94599
January 25th, 2024
Exhibit ‘E’
Proposed Condition HydroCAD Calculations
1S
DA-1
POST-DEVELOPMENT
2P
BIO-RETENTION
Routing Diagram for 2640 Post-development
Prepared by ams associates, inc, Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link
2640 Post-development
Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Page 2 Area Listing (all nodes)
Area
(sq-ft)
C Description
(subcatchment-numbers)
9,842 0.90 (1S)
605 0.30 (1S)
10,447 0.87 TOTAL AREA
2640 Post-development
Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Page 3 Soil Listing (all nodes)
Area
(sq-ft)
Soil
Group
Subcatchment
Numbers
0 HSG A
0 HSG B
0 HSG C
0 HSG D
10,447 Other 1S
10,447 TOTAL AREA
2640 Post-development
Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Page 4 Ground Covers (all nodes)
HSG-A
(sq-ft)
HSG-B
(sq-ft)
HSG-C
(sq-ft)
HSG-D
(sq-ft)
Other
(sq-ft)
Total
(sq-ft)
Ground
Cover
Subcatchment
Numbers
0 0 0 0 10,447 10,447 1S
0 0 0 0 10,447 10,447 TOTAL AREA
2640 Post-development
Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Page 5 Pipe Listing (all nodes)
Line# Node
Number
In-Invert
(feet)
Out-Invert
(feet)
Length
(feet)
Slope
(ft/ft)
n Width
(inches)
Diam/Height
(inches)
Inside-Fill
(inches)
1 2P 106.62 106.25 17.0 0.0218 0.013 0.0 3.0 0.0
2640 Post-development CA-Yountville 2640 100-yr Duration=10 min, Inten=3.13 in/hr Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Page 6 Time span=0.00-1.00 hrs, dt=0.01 hrs, 101 points
Runoff by Rational method, Rise/Fall=1.0/1.0 xTc
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1S: DA-1 POST-DEVELOPMENT Runoff Area=10,447 sf 0.00% Impervious Runoff Depth=0.45" Tc=10.0 min C=0.87 Runoff=0.65 cfs 395 cf
Pond 2P: BIO-RETENTION Peak Elev=106.29' Storage=395 cf Inflow=0.65 cfs 395 cf Outflow=0.00 cfs 0 cf
Total Runoff Area = 10,447 sf Runoff Volume = 395 cf Average Runoff Depth = 0.45" 100.00% Pervious = 10,447 sf 0.00% Impervious = 0 sf
2640 Post-development CA-Yountville 2640 100-yr Duration=10 min, Inten=3.13 in/hr Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment 1S: DA-1 POST-DEVELOPMENT
Runoff = 0.65 cfs @ 0.17 hrs, Volume= 395 cf, Depth= 0.45" Runoff by Rational method, Rise/Fall=1.0/1.0 xTc, Time Span= 0.00-1.00 hrs, dt= 0.01 hrs CA-Yountville 2640 100-yr Duration=10 min, Inten=3.13 in/hr Area (sf) C Description
9,842 0.90
605 0.30
10,447 0.87 Weighted Average
10,447 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
10.0 Direct Entry,
Subcatchment 1S: DA-1 POST-DEVELOPMENT
Runoff
Hydrograph
Time (hours)
0 1 Flow (cfs)
0.7 0.65
0.6 0.55
0.5 0.45
0.4 0.35
0.3 0.25
0.2 0.15
0.1 0.05
0 CA-Yountville 2640 100-yr
Duration=10 min,
Inten=3.13 in/hr
Runoff Area=10,447 sf
Runoff Volume=395 cf
Runoff Depth=0.45"
Tc=10.0 min
C=0.87
0.65 cfs
2640 Post-development CA-Yountville 2640 100-yr Duration=10 min, Inten=3.13 in/hr Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Page 8 Hydrograph for Subcatchment 1S: DA-1 POST-DEVELOPMENT
Time
(hours)
Runoff
(cfs)
0.00 0.00
0.01 0.04
0.02 0.08
0.03 0.12
0.04 0.16
0.05 0.20
0.06 0.24
0.07 0.28
0.08 0.32
0.09 0.36
0.10 0.40
0.11 0.43
0.12 0.47
0.13 0.51
0.14 0.55
0.15 0.59
0.16 0.63
0.17 0.65
0.18 0.61
0.19 0.57
0.20 0.53
0.21 0.49
0.22 0.45
0.23 0.41
0.24 0.37
0.25 0.33
0.26 0.29
0.27 0.25
0.28 0.21
0.29 0.17
0.30 0.13
0.31 0.09
0.32 0.05
0.33 0.01
0.34 0.00
0.35 0.00
0.36 0.00
0.37 0.00
0.38 0.00
0.39 0.00
0.40 0.00
0.41 0.00
0.42 0.00
0.43 0.00
0.44 0.00
0.45 0.00
0.46 0.00
0.47 0.00
0.48 0.00
0.49 0.00
0.50 0.00
0.51 0.00
0.52 0.00
0.53 0.00
0.54 0.00
0.55 0.00
0.56 0.00
0.57 0.00
0.58 0.00
0.59 0.00
0.60 0.00
0.61 0.00
0.62 0.00
0.63 0.00
0.64 0.00
0.65 0.00
Time
(hours)
Runoff
(cfs)
0.66 0.00
0.67 0.00
0.68 0.00
0.69 0.00
0.70 0.00
0.71 0.00
0.72 0.00
0.73 0.00
0.74 0.00
0.75 0.00
0.76 0.00
0.77 0.00
0.78 0.00
0.79 0.00
0.80 0.00
0.81 0.00
0.82 0.00
0.83 0.00
0.84 0.00
0.85 0.00
0.86 0.00
0.87 0.00
0.88 0.00
0.89 0.00
0.90 0.00
0.91 0.00
0.92 0.00
0.93 0.00
0.94 0.00
0.95 0.00
0.96 0.00
0.97 0.00
0.98 0.00
0.99 0.00
1.00 0.00
2640 Post-development CA-Yountville 2640 100-yr Duration=10 min, Inten=3.13 in/hr Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Page 9 Summary for Pond 2P: BIO-RETENTION
Inflow Area = 10,447 sf, 0.00% Impervious, Inflow Depth = 0.45" for 100-yr event Inflow = 0.65 cfs @ 0.17 hrs, Volume= 395 cf
Outflow = 0.00 cfs @ 0.00 hrs, Volume= 0 cf, Atten= 100%, Lag= 0.0 min Primary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf
Routing by Stor-Ind method, Time Span= 0.00-1.00 hrs, dt= 0.01 hrs Peak Elev= 106.29' @ 0.34 hrs Surf.Area= 1,202 sf Storage= 395 cf Plug-Flow detention time= (not calculated: initial storage exceeds outflow) Center-of-Mass det. time= (not calculated: no outflow)
Volume Invert Avail.Storage Storage Description
#1 103.60' 140 cf 4.50'W x 89.00'L x 1.00'H Prismatoid
401 cf Overall x 35.0% Voids
#2 104.60' 180 cf 4.50'W x 89.00'L x 1.50'H Prismatoid
601 cf Overall x 30.0% Voids
#3 106.10' 561 cf 4.50'W x 89.00'L x 1.40'H Prismatoid
881 cf Total Available Storage
Device Routing Invert Outlet Devices
#1 Device 2 106.60' 36.0" W x 36.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #2 Primary 106.62' 3.0" Round Culvert X 2.00 L= 17.0' Ke= 0.500 Inlet / Outlet Invert= 106.62' / 106.25' S= 0.0218 '/' Cc= 0.900 n= 0.013, Flow Area= 0.05 sf
#3 Device 2 104.43' 4.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=103.60' (Free Discharge) 2=Culvert ( Controls 0.00 cfs)
1=Orifice/Grate ( Controls 0.00 cfs)
3=Orifice/Grate ( Controls 0.00 cfs)
Pond 2P: BIO-RETENTION
Inflow
Primary
Hydrograph
Time (hours)
0 1 Flow (cfs)
0.7 0.65
0.6 0.55
0.5 0.45
0.4 0.35
0.3 0.25
0.2 0.15
0.1 0.05
0 Inflow Area=10,447 sf
Peak Elev=106.29'
Storage=395 cf
0.65 cfs
0.00 cfs
2640 Post-development CA-Yountville 2640 100-yr Duration=10 min, Inten=3.13 in/hr Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Page 10 Pond 2P: BIO-RETENTION
Primary
Stage-Discharge
Discharge (cfs)
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 Elevation (feet) 109
108
107
106
105
104
Orifice/Grate Culvert
Orifice/Grate
Pond 2P: BIO-RETENTION
Storage
Stage-Area-Storage
Storage (cubic-feet)
0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 Elevation (feet) 109
108
107
106
105
104
Prismatoid
Prismatoid
Prismatoid
2640 Post-development CA-Yountville 2640 100-yr Duration=10 min, Inten=3.13 in/hr Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Page 11 Hydrograph for Pond 2P: BIO-RETENTION
Time
(hours)
Inflow
(cfs)
Storage
(cubic-feet)
Elevation
(feet)
Primary
(cfs)
0.00 0.00 0 103.60 0.00
0.01 0.04 1 103.61 0.00
0.02 0.08 3 103.62 0.00
0.03 0.12 6 103.65 0.00
0.04 0.16 11 103.68 0.00
0.05 0.20 18 103.73 0.00
0.06 0.24 26 103.78 0.00
0.07 0.28 35 103.85 0.00
0.08 0.32 46 103.92 0.00
0.09 0.36 58 104.01 0.00
0.10 0.40 71 104.11 0.00
0.11 0.43 86 104.21 0.00
0.12 0.47 102 104.33 0.00
0.13 0.51 120 104.46 0.00
0.14 0.55 139 104.60 0.00
0.15 0.59 160 104.77 0.00
0.16 0.63 182 104.95 0.00
0.17 0.65 205 105.14 0.00
0.18 0.61 228 105.33 0.00
0.19 0.57 249 105.50 0.00
0.20 0.53 269 105.67 0.00
0.21 0.49 287 105.82 0.00
0.22 0.45 304 105.96 0.00
0.23 0.41 319 106.09 0.00
0.24 0.37 333 106.13 0.00
0.25 0.33 346 106.16 0.00
0.26 0.29 357 106.19 0.00
0.27 0.25 367 106.22 0.00
0.28 0.21 375 106.24 0.00
0.29 0.17 382 106.25 0.00
0.30 0.13 387 106.27 0.00
0.31 0.09 391 106.28 0.00
0.32 0.05 394 106.28 0.00
0.33 0.01 395 106.29 0.00
0.34 0.00 395 106.29 0.00
0.35 0.00 395 106.29 0.00
0.36 0.00 395 106.29 0.00
0.37 0.00 395 106.29 0.00
0.38 0.00 395 106.29 0.00
0.39 0.00 395 106.29 0.00
0.40 0.00 395 106.29 0.00
0.41 0.00 395 106.29 0.00
0.42 0.00 395 106.29 0.00
0.43 0.00 395 106.29 0.00
0.44 0.00 395 106.29 0.00
0.45 0.00 395 106.29 0.00
0.46 0.00 395 106.29 0.00
0.47 0.00 395 106.29 0.00
0.48 0.00 395 106.29 0.00
0.49 0.00 395 106.29 0.00
0.50 0.00 395 106.29 0.00
0.51 0.00 395 106.29 0.00
0.52 0.00 395 106.29 0.00
0.53 0.00 395 106.29 0.00
0.54 0.00 395 106.29 0.00
0.55 0.00 395 106.29 0.00
0.56 0.00 395 106.29 0.00
0.57 0.00 395 106.29 0.00
0.58 0.00 395 106.29 0.00
0.59 0.00 395 106.29 0.00
0.60 0.00 395 106.29 0.00
0.61 0.00 395 106.29 0.00
0.62 0.00 395 106.29 0.00
0.63 0.00 395 106.29 0.00
0.64 0.00 395 106.29 0.00
0.65 0.00 395 106.29 0.00
Time
(hours)
Inflow
(cfs)
Storage
(cubic-feet)
Elevation
(feet)
Primary
(cfs)
0.66 0.00 395 106.29 0.00
0.67 0.00 395 106.29 0.00
0.68 0.00 395 106.29 0.00
0.69 0.00 395 106.29 0.00
0.70 0.00 395 106.29 0.00
0.71 0.00 395 106.29 0.00
0.72 0.00 395 106.29 0.00
0.73 0.00 395 106.29 0.00
0.74 0.00 395 106.29 0.00
0.75 0.00 395 106.29 0.00
0.76 0.00 395 106.29 0.00
0.77 0.00 395 106.29 0.00
0.78 0.00 395 106.29 0.00
0.79 0.00 395 106.29 0.00
0.80 0.00 395 106.29 0.00
0.81 0.00 395 106.29 0.00
0.82 0.00 395 106.29 0.00
0.83 0.00 395 106.29 0.00
0.84 0.00 395 106.29 0.00
0.85 0.00 395 106.29 0.00
0.86 0.00 395 106.29 0.00
0.87 0.00 395 106.29 0.00
0.88 0.00 395 106.29 0.00
0.89 0.00 395 106.29 0.00
0.90 0.00 395 106.29 0.00
0.91 0.00 395 106.29 0.00
0.92 0.00 395 106.29 0.00
0.93 0.00 395 106.29 0.00
0.94 0.00 395 106.29 0.00
0.95 0.00 395 106.29 0.00
0.96 0.00 395 106.29 0.00
0.97 0.00 395 106.29 0.00
0.98 0.00 395 106.29 0.00
0.99 0.00 395 106.29 0.00
1.00 0.00 395 106.29 0.00
2640 Post-development CA-Yountville 2640 100-yr Duration=10 min, Inten=3.13 in/hr Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Page 12 Stage-Discharge for Pond 2P: BIO-RETENTION
Elevation
(feet)
Primary
(cfs)
103.60 0.00
103.62 0.00
103.64 0.00
103.66 0.00
103.68 0.00
103.70 0.00
103.72 0.00
103.74 0.00
103.76 0.00
103.78 0.00
103.80 0.00
103.82 0.00
103.84 0.00
103.86 0.00
103.88 0.00
103.90 0.00
103.92 0.00
103.94 0.00
103.96 0.00
103.98 0.00
104.00 0.00
104.02 0.00
104.04 0.00
104.06 0.00
104.08 0.00
104.10 0.00
104.12 0.00
104.14 0.00
104.16 0.00
104.18 0.00
104.20 0.00
104.22 0.00
104.24 0.00
104.26 0.00
104.28 0.00
104.30 0.00
104.32 0.00
104.34 0.00
104.36 0.00
104.38 0.00
104.40 0.00
104.42 0.00
104.44 0.00
104.46 0.00
104.48 0.00
104.50 0.00
104.52 0.00
104.54 0.00
104.56 0.00
104.58 0.00
104.60 0.00
104.62 0.00
104.64 0.00
104.66 0.00
104.68 0.00
104.70 0.00
104.72 0.00
104.74 0.00
104.76 0.00
104.78 0.00
104.80 0.00
104.82 0.00
104.84 0.00
104.86 0.00
104.88 0.00
104.90 0.00
Elevation
(feet)
Primary
(cfs)
104.92 0.00
104.94 0.00
104.96 0.00
104.98 0.00
105.00 0.00
105.02 0.00
105.04 0.00
105.06 0.00
105.08 0.00
105.10 0.00
105.12 0.00
105.14 0.00
105.16 0.00
105.18 0.00
105.20 0.00
105.22 0.00
105.24 0.00
105.26 0.00
105.28 0.00
105.30 0.00
105.32 0.00
105.34 0.00
105.36 0.00
105.38 0.00
105.40 0.00
105.42 0.00
105.44 0.00
105.46 0.00
105.48 0.00
105.50 0.00
105.52 0.00
105.54 0.00
105.56 0.00
105.58 0.00
105.60 0.00
105.62 0.00
105.64 0.00
105.66 0.00
105.68 0.00
105.70 0.00
105.72 0.00
105.74 0.00
105.76 0.00
105.78 0.00
105.80 0.00
105.82 0.00
105.84 0.00
105.86 0.00
105.88 0.00
105.90 0.00
105.92 0.00
105.94 0.00
105.96 0.00
105.98 0.00
106.00 0.00
106.02 0.00
106.04 0.00
106.06 0.00
106.08 0.00
106.10 0.00
106.12 0.00
106.14 0.00
106.16 0.00
106.18 0.00
106.20 0.00
106.22 0.00
Elevation
(feet)
Primary
(cfs)
106.24 0.00
106.26 0.00
106.28 0.00
106.30 0.00
106.32 0.00
106.34 0.00
106.36 0.00
106.38 0.00
106.40 0.00
106.42 0.00
106.44 0.00
106.46 0.00
106.48 0.00
106.50 0.00
106.52 0.00
106.54 0.00
106.56 0.00
106.58 0.00
106.60 0.00
106.62 0.00
106.64 0.00
106.66 0.01
106.68 0.02
106.70 0.03
106.72 0.04
106.74 0.05
106.76 0.07
106.78 0.09
106.80 0.11
106.82 0.13
106.84 0.15
106.86 0.16
106.88 0.17
106.90 0.19
106.92 0.20
106.94 0.21
106.96 0.22
106.98 0.23
107.00 0.24
107.02 0.25
107.04 0.26
107.06 0.27
107.08 0.27
107.10 0.28
107.12 0.28
107.14 0.29
107.16 0.29
107.18 0.29
107.20 0.30
107.22 0.30
107.24 0.31
107.26 0.31
107.28 0.31
107.30 0.32
107.32 0.32
107.34 0.33
107.36 0.33
107.38 0.33
107.40 0.34
107.42 0.34
107.44 0.35
107.46 0.35
107.48 0.35
107.50 0.36
107.52 0.36
107.54 0.36
Elevation
(feet)
Primary
(cfs)
107.56 0.37
107.58 0.37
107.60 0.37
107.62 0.38
107.64 0.38
107.66 0.38
107.68 0.39
107.70 0.39
107.72 0.39
107.74 0.40
107.76 0.40
107.78 0.40
107.80 0.41
107.82 0.41
107.84 0.41
107.86 0.42
107.88 0.42
107.90 0.42
107.92 0.42
107.94 0.43
107.96 0.43
107.98 0.43
108.00 0.44
108.02 0.44
108.04 0.44
108.06 0.45
108.08 0.45
108.10 0.45
108.12 0.45
108.14 0.46
108.16 0.46
108.18 0.46
108.20 0.46
108.22 0.47
108.24 0.47
108.26 0.47
108.28 0.48
108.30 0.48
108.32 0.48
108.34 0.48
108.36 0.49
108.38 0.49
108.40 0.49
108.42 0.49
108.44 0.50
108.46 0.50
108.48 0.50
108.50 0.50
108.52 0.51
108.54 0.51
108.56 0.51
108.58 0.51
108.60 0.52
108.62 0.52
108.64 0.52
108.66 0.52
108.68 0.53
108.70 0.53
108.72 0.53
108.74 0.53
108.76 0.54
108.78 0.54
108.80 0.54
108.82 0.54
108.84 0.55
108.86 0.55
Elevation
(feet)
Primary
(cfs)
108.88 0.55
108.90 0.55
108.92 0.55
108.94 0.56
108.96 0.56
108.98 0.56
109.00 0.56
109.02 0.57
109.04 0.57
109.06 0.57
109.08 0.57
109.10 0.57
109.12 0.58
109.14 0.58
109.16 0.58
109.18 0.58
109.20 0.59
109.22 0.59
109.24 0.59
109.26 0.59
109.28 0.59
109.30 0.60
109.32 0.60
109.34 0.60
109.36 0.60
109.38 0.60
109.40 0.61
109.42 0.61
109.44 0.61
109.46 0.61
109.48 0.62
109.50 0.62
109.52 0.62
109.54 0.62
109.56 0.62
109.58 0.63
109.60 0.63
2640 Post-development CA-Yountville 2640 100-yr Duration=10 min, Inten=3.13 in/hr Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC Page 13 Stage-Area-Storage for Pond 2P: BIO-RETENTION
Elevation
(feet)
Storage
(cubic-feet)
103.60 0
103.65 7
103.70 14
103.75 21
103.80 28
103.85 35
103.90 42
103.95 49
104.00 56
104.05 63
104.10 70
104.15 77
104.20 84
104.25 91
104.30 98
104.35 105
104.40 112
104.45 119
104.50 126
104.55 133
104.60 140
104.65 146
104.70 152
104.75 158
104.80 164
104.85 170
104.90 176
104.95 182
105.00 188
105.05 194
105.10 200
105.15 206
105.20 212
105.25 218
105.30 224
105.35 230
105.40 236
105.45 242
105.50 248
105.55 254
105.60 260
105.65 266
105.70 272
105.75 278
105.80 284
105.85 290
105.90 296
105.95 302
106.00 308
106.05 314
106.10 320
106.15 340
106.20 360
106.25 380
106.30 401
106.35 421
106.40 441
106.45 461
106.50 481
106.55 501
106.60 521
106.65 541
106.70 561
106.75 581
106.80 601
106.85 621
Elevation
(feet)
Storage
(cubic-feet)
106.90 641
106.95 661
107.00 681
107.05 701
107.10 721
107.15 741
107.20 761
107.25 781
107.30 801
107.35 821
107.40 841
107.45 861
107.50 881
107.55 881
107.60 881
107.65 881
107.70 881
107.75 881
107.80 881
107.85 881
107.90 881
107.95 881
108.00 881
108.05 881
108.10 881
108.15 881
108.20 881
108.25 881
108.30 881
108.35 881
108.40 881
108.45 881
108.50 881
108.55 881
108.60 881
108.65 881
108.70 881
108.75 881
108.80 881
108.85 881
108.90 881
108.95 881
109.00 881
109.05 881
109.10 881
109.15 881
109.20 881
109.25 881
109.30 881
109.35 881
109.40 881
109.45 881
109.50 881
109.55 881
109.60 881
2640 Post-development Table of Contents
Prepared by ams associates, inc Printed 1/24/2024
HydroCAD® 10.10-5a s/n 11794 © 2020 HydroCAD Software Solutions LLC
TABLE OF CONTENTS
Project Reports
1 Routing Diagram
2 Area Listing (all nodes)
3 Soil Listing (all nodes)
4 Ground Covers (all nodes)
5 Pipe Listing (all nodes)
100-yr Event
6 Node Listing
7 Subcat 1S: DA-1 POST-DEVELOPMENT
9 Pond 2P: BIO-RETENTION
On-Site Hydrology / Hydraulic Study
Mixed-Use Building
Humboldt Street & Jefferson Street
Yountville, CA 94599
January 25th, 2024
Exhibit ‘F’
Horizontal Control Plan
T
SHED
STOP
SSCO
GRAVEL DRIVEWAY
EB
N 60°31'53" E 107.65' N 29°29'44" W 100.60'
N 60°30'16" E 107.76' N 29°25'50" W 100.69'
57.65' 50.00'
57.76' 50.00'
HUMBOLDT STREET
JEFFERSON STREET S 28°47'03" E
23.76' 23.45'
N 60°30'16" E 370.11'
WASHINGTON STREET
FND REBAR/CAP
"LS 4510"
FND REBAR/CAP
"LS 4510" N 29°29'44" W 100.63' VAN
2 2
7 5
1 BIKE
USPS
EV
ART
11 10
9 8
7 6
5 4
3 2
1 EV
BIKE
USPS
EV
DWTR
DWTR
ART
Know what'sbelow. Callbefore you dig.
R
On-Site Hydrology / Hydraulic Study
Mixed-Use Building
Humboldt Street & Jefferson Street
Yountville, CA 94599
January 25th, 2024
Exhibit ‘G’
Preliminary Grading Plan
T
SHED
SSCO
GRAVEL DRIVEWAY
EB EV
LOT 1
[14 M 75]
LOT 2
[14 M 75]
LOT 3
[14 M 75]
[19 PM 77]
HUMBOLDT STREET
JEFFERSON STREET
0.133± ACRES 0.116± ACRES
DRAINAGE EASEMENT
[14 M 75] NON-ACCESS [14 M 75]
WASHINGTON STREET
BIKE
USPS
EV
ART
11 10
9 8
7 6
5 4
3 2
1 EV
BIKE
USPS
EV
DWTR
DWTR
ART
Know what'sbelow. Callbefore you dig.
R
’
’
’
’
’
’
’
On-Site Hydrology / Hydraulic Study
Mixed-Use Building
Humboldt Street & Jefferson Street
Yountville, CA 94599
January 25th, 2024
Exhibit ‘H’
Preliminary Utility Plan
T
SHED
SSCO
GRAVEL DRIVEWAY
EB EV
LOT 3
[14 M 75]
PARCEL 3
[19 PM 77]
HUMBOLDT STREET
JEFFERSON STREET
WASHINGTON STREET
BIKE
USPS
EV
ART
11 10
9 8
7 6
5 4
3 2
1 EV
BIKE
USPS
EV
DWTR
DWTR
ART
Know what'sbelow. Callbefore you dig.
R
” ”
”
’”