City of Patterson
Study 2018-19
Water, Sewer & Storm Drainage Impact Fees
Attached: City Council Agenda Report &
Resolution
Adopted Aug 20th, 2019
BARTLE WELLS ASSOCIATES
Independent Public Finance Advisors
January 30th, 2019
Mike Willett, Director of Public Works
Public Works Department
1 Plaza
Patterson, CA 95363
RE: Water, Sewer and Storm Drainage Impact Fee Study
Bartle Wells Associates (BWA) is pleased to submit the attached Water, Sewer and Storm Drainage Impact Fee Study. The report develops updated water, sewer and storm drainage impact fees that are designed to equitably recover the costs of infrastructure and assets benefiting new development.
The City’s current impact fees are based on a fee study adopted March 7th, 2006, which recommended charging impact fees by dwelling unit for residential customers and square footage of floor area for commercial and industrial customers. BWA’s proposed fee methodology represents a transition from the City’s current practices for the water and sewer impact fees. New water and sewer impact fees are recommended to be charged based on water meter size for most customers. BWA recommends no change to the storm drainage impact fee methodology.
Proposed fees are calculated under an expansion-only methodology. A summary of proposed fees is shown on Table 2 of this report. Existing capital assets are excluded from the basis of the fee calculation. The fees are based solely on future capital projects and land benefitting new customers, as identified in the City’s 2018 Water Master Plan, 2018 Storm Drainage Master Plan, 2016 Wastewater Master Plan and 2018 cost update, and 2015 Urban Water Management Plan.
Proposed Fees - Expansion Only Cost Approach (1” or Below Meter, Single Family Home):
o Water: $10,678
o Sewer: $6,443
o Storm Drainage: $2,535
We enjoyed working with the City on this assignment and appreciate the input and assistance received from City staff throughout the project. Please contact us anytime if you have questions about this report or related impact fee issues.
BARTLE WELLS ASSOCIATES
Douglas Dove, PE, CIPFA Michael DeGroot
Principal/President Consultant
1889 Alcatraz Avenue
Berkeley, CA 94703
510 653 3399 fax: 510 653 3769
www.bartlewells.com
2 CONTENTS
1. Background, Objectives, & Government Code ................................................................ 3 Background ............................................................................................................................. 3 Objectives ................................................................................................................................ 3 Government Code ................................................................................................................... 4 Summary of Proposed Impact Fees ........................................................................................ 5
2. Impact Fee Calculations .................................................................................................. 6 General Fee Methodology ...................................................................................................... 6 Facility Cost Valuation ............................................................................................................. 6 Expansion or Marginal Cost Approach .................................................................................... 6 Water Proposed Impact Fees .................................................................................................. 7 Water Impact Fee Nexus ......................................................................................................... 7 Sewer Proposed Impact Fees .................................................................................................. 9 Sewer Impact Fee Nexus ......................................................................................................... 9 Storm Drainage Proposed Impact Fees ................................................................................ 11 Storm Drain Impact Fee Nexus ............................................................................................. 11 Tables
Table 1 – Current Impact Fees
Table 2 – Current and Proposed Water, Sewer and Storm Drainage Impact Fees Table 3 – Water Impact Fee Calculation
Table 4 – Sewer Impact Fee Calculation
Table 5 – Storm Drainage Impact Fee Calculation
Appendices
Appendix A - Additional Supporting Tables
Appendix B - Regional Impact Fee Surveys
Appendix C - Accessory Dwelling Units
Appendix D - Plumbing Code
3 1. Background, Objectives, & Government Code
Background
The City of Patterson (the City) is a general law City located in western Stanislaus County with a population of approximately 22,730. The City owns and operates its own water, sewer and storm drainage systems.
Table 1 shows the City’s current impact fee schedule. The City levies development impact fees on new development within the City’s service area. These impact fees are generally designed to recover costs for facilities that benefit growth and recover costs for capacity in system infrastructure. This report develops updated impact fees for new and expanded connections to the City’s water, sewer and storm drainage systems.
Objectives
A key recommendation of the report is to transition water and sewer impact fees from commercial and industrial square footage of floor area and dwelling units to meter size for all customers except multifamily and accessory dwelling units. BWA recommends multifamily units pay a reduced fee per unit because they use less water per unit than a typical single-family home. Additionally, charges by meter size for multifamily units less accurately capture capacity demands than a per unit charge and incentivizes under-sizing the meter.
Accessory dwelling units are recommended to be charged based on fixture units or square footage to comply with California law by taking the varying size and impact of the accessory dwelling unit into account.
Table 1
City of Patterson
Current Impact Fees
Residential Impact Fees All Residential
Water - (per dwelling unit) $13,505
Sewer - (per dwelling unit) $4,307
Storm Drainage - (per dwelling unit) $5,379
Non Residential Impact Fees Commercial Industrial
Water - (per sq. ft.) $6.23 $6.23
Sewer - (per sq. ft.) $2.11 $2.49
Storm Drainage - (per sq. ft.) $3.62 $4.11
4 Appendix C shows the detailed calculation of accessory dwelling unit impact fees.
Key objectives of the study include:
Provide independent review of the City’s current impact fees; Develop updated impact fees that:
o Recover the costs of infrastructure, assets, and water supply that benefit new development as identified in the latest engineering master plans;
o Equitably recover costs from new connections to the City’s service area; o Are consistent with industry-standard practices and methodologies; o Comply with government code.
This report presents key findings and recommendations as well as final impact fee alternatives for City consideration. The recommendations and alternatives presented in this report incorporate input from City staff.
Government Code
Development impact fees are governed by California Government Code Section 66000 et. seq. commonly known as AB1600. The Code refers to impact fees as capacity charges since their purpose is to recover an equitable share of costs for capacity in infrastructure.
Section 66013 of the Code specifically governs water and sewer capacity charges and states that the fee “shall not exceed the estimated reasonable cost of providing the service for which the fee or charge is imposed” unless approved by a two-thirds vote.
The Code also states that "Capacity charge means a charge for public facilities in existence at the time a charge is imposed or charges for new public facilities to be acquired or constructed in the future that are of proportional benefit to the person or property being charged.” The Code does not detail any specific method for determining an appropriate fee.
Section 66013 also identifies various accounting requirements for capacity fee revenues, notably that such revenues cannot be co-mingled with other City revenues and must be used solely for the purpose for which the fee was imposed. Section 66016 of the Code identifies the procedural requirements for adopting or increasing a water or sewer capacity charge.
5 Summary of Proposed Impact Fees
Table 2 shows a summary of the current and proposed water, sewer and storm drainage impact fees.
Table 2
City of Patterson
Current and Proposed Water, Sewer and Storm Drainage Impact Fees Water Impact Fees Sewer Impact Fees
Customer Type Current Fee Proposed Fee* Customer Type Current Fee Proposed Fee Residential Dwelling Unit $13,505 Residential Dwelling Unit $4,307 Commercial Floor Area (sq. ft.) $6.23 Commercial Floor Area (sq. ft.) $2.11 Industrial Floor Area (sq. ft.) $6.23 Industrial Floor Area (sq. ft.) $2.49 Meter Size (inches) Meter Size (inches)
1" & below $10,678 1" & below $6,443
1 1/2" $13,142 1 1/2" $7,930
2" $21,356 2" $12,886
3" $82,140 3" $49,560
4" $104,317 4" $62,941
6" $156,886 6" $94,660
8" $216,848 8" $130,839
Per Dwelling Unit Per Dwelling Unit
Multi Family Unit $6,407 Multi Family Unit $5,476
Per Fixture Unit Per Fixture Unit
Accessory Dwelling Unit $562 Accessory Dwelling Unit $339 *Fire meters are proposed to be charged 15% of the regular meter rate Storm Drainage Impact Fees
Customer Type Current Fee Proposed Fee
Per Dwelling Unit
Residential Dwelling Unit $5,379 $2,535
Per Square Foot
Park / Open Space / Public / Quasi-Public (sq. ft.) N/A $0.30 Per Square Foot of Floor Area
Accessory Dwelling Unit (sq. ft.) N/A $1.05
Commercial Floor Area (sq. ft.) $3.62 $0.96
Industrial Floor Area (sq. ft.) $4.11 $1.65
6 2. Impact Fee Calculations
This section details the calculation of updated impact fees under the expansion or marginal cost approach.
The fees were calculated and designed to be simple and straightforward to implement.
General Fee Methodology
There are many methods for calculating impact fees. The general methodology used in this report is summarized below.
Facility Cost Valuation
The fees are based solely on future capital projects benefitting new customers, as identified in the City’s 2018 Water Master Plan, 2018 Storm Drainage Master Plan, 2016 Wastewater Master Plan and 2018 cost update, and 2015 Urban Water Management Plan.
Expansion or Marginal Cost Approach
This report calculates new impact fees under the expansion-only fee approach. Under this approach, the fees are based on the cost of future expansion-related improvements (in current dollars) divided by the increase in system capacity associated with those improvements. Fees calculated under this approach represent the Step 4 - Apply Cost per Unit to the Demand Units of New Development Apply the unit cost for capacity to the demands of each new development to determine an equitable impact fee per development.
Step 3 - Calculate Cost per Unit of Capacity
Calculate the cost per unit of capacity by dividing the costs identified for fee recovery in Step 1 by the capacity of those facilities identified in Step 2 Step 2 - Identify Capacity of Facilities
Identify the corresponding capacity of facilities and assets identified in Step 1 Step 1 - Determine Cost of Facilities for Fee Recovery
Determine the recoverable cost of facilities and assets benefiting new development that will be recovered by the impact fees
7 marginal cost of adding a unit of expansion. This approach excludes cost recovery for existing facilities and assets that provide benefit to new development.
Water Proposed Impact Fees
Table 3 shows the water impact fee calculation. Based on the 2018 City of Patterson Water Master Plan Table ES – 2, total consumption of the City is projected to increase from 3,957 acre feet per year (AFY) in 2013 to 14,627 AFY at buildout in 2050. The total increase amounts to 10,670 AFY.
The 2018 City of Patterson Water Master Plan Table ES – 14 identifies the capital improvement needs to meet future growth. The total cost of future capital improvements required to meet buildout water demands amounts to $238,769,000 or $22,378 per additional AFY. A detailed table showing the capital improvement information is shown on Appendix A – Water Capital Improvement Program (Table 1).
Water Impact Fee Nexus
BWA calculated the actual demand of an average customer with a 1” and below meter to be 0.48 AFY based on the City’s actual water consumption. The proposed impact fee for a 1” and below meter is $10,678. BWA increased the fee for larger meters based on American Water Works Association (AWWA) standard meter equivalent ratios. Multi-family units are recommended to be charged based on 60% of the 1” and below fee due to reduced water demand per unit than a typical 1” or below customer.
Private fire meters are recommended to be charged 15% of the regular meter fee to reflect the benefits private customers receive such as saving lives and extinguishing fires more quickly. The nature of this capacity differs from a regular meter capacity because it is on standby and not used except in emergencies.
Additionally, private fire meters provide benefits to the public at large by preventing the spreading of fires.
Therefore, the fee for private fire meters should be a fraction of the fee for a standard meter. Industry standard capacity fees for fire meters range from 0% to 25% of the standard meter capacity fee.
Appendix B shows a regional water impact fee survey.
8 Table 3
City of Patterson
Water Impact Fee Calculation
Supply and Demand Analysis 2013 2050
Potable Average Annual Demand (AFY) 3,687 14,231
Non-Potable Average Annual Demand (AFY) 270 396
Total Consumption (AFY) 3,957 14,627
Source: City of Patterson Water Master Plan Table ES - 2 Additional Future System Consumption to Buildout (AFY) 10,670 Future System (ES - 14: Capital
Improvement Plan Summary) $238,769,000
$/AFY $22,378
Meter AWWA Demand
Size Meter Ratios (AFY)
1" & below21.0 0.48 $10,678 $1,602
1 1/2" 1.2 0.59 $13,142 $1,971
2" 2.0 0.95 $21,356 $3,203
3" 7.7 3.67 $82,140 $12,321
4" 9.8 4.66 $104,317 $15,648
6" 14.7 7.01 $156,886 $23,533
8" 20.3 9.69 $216,848 $32,527
1 Based on 15% of the regular meter fee
2 Demand (AFY) based on average actual use in CY 2013
Multifamily (per unit)* Demand (AFY) Proposed Impact Fee *Based on 60% of 1" and below demand 0.29 $6,407
Proposed Impact
Fee
Proposed Impact
Fee (Fire Meter)1
9 Sewer Proposed Impact Fees
Table 4 shows the sewer impact fee calculation. Based on the City of Patterson Wastewater Master Plan 2016, Table 4-14 and input from City staff, the existing system is designed to treat 2.25 million gallons per day (MGD) of average dry weather flow (ADWF). At buildout, the system is projected to treat 6.29 MGD of ADWF, representing an increase of 4.04 MGD.
Sewer Impact Fee Nexus
BWA calculated the proposed sewer impact fees based on two components identified in the 2016 Wastewater Master Plan and 2018 cost update: 1) future collection system assets, totaling $20.37 MM and 2) future treatment system assets totaling $78.58 MM. The total system expansion cost amounts to $98.95 MM or approximately $24.49 MM per additional MGD of capacity. A detailed table showing the capital improvement information is shown on Appendix A – Sewer Capital Improvement Program (Table 2).
BWA determined the demand each meter size places on the sewer system by calculating an average of actual winter use during winter months (January – March). Based on this approach, 1” and below customers are estimated to use 263 gallons per day (GPD). Under this methodology, the collection portion of the fee amounts to $1,326 per 1” and below meter and the treatment portion of the fee amounts to $5,116 per 1” and below meter, for a total combined fee of $6,443. BWA increased the fee for larger meters based on AWWA standard meter equivalent ratios. Multi-family units are recommended to be charged based on 85% of the 1” and below fee due to reduced winter water demand per unit than a typical 1” or below customer.
Appendix B shows a regional sewer impact fee survey.
10 Table 4
City of Patterson
Sewer Impact Fee Calculation
Development Condition ADWF1 (MGD2)
Existing 2.25
Buildout 6.29
Source: City of Patterson Wastewater Master Plan 2016, Table 4-14 Additional Future System Capacity
(ADWF) to Buildout (MGD) 4.04
Future Collection System (City of Patterson
Wastewater Master Plan 2016, Appendix E to H) $20,372,878 $/MGD $5,042,792
Future Treatment System (City of Patterson
Wastewater Master Plan 2016, Appendix E to H) $78,581,847 $/MGD $19,450,952
Total System (City of Patterson Wastewater
Master Plan 2016, Appendix E to H) $98,954,725
$/MGD $24,493,744
Meter AWWA Demand Demand Collection Treatment Total Proposed Size Meter Ratios (MGD) (GPD3) Fee Fee Impact Fee
1" & below 1.0 0.00026 263 $1,326 $5,116 $6,443
1 1/2" 1.2 0.00032 324 $1,633 $6,297 $7,930
2" 2.0 0.00053 526 $2,653 $10,233 $12,886
3" 7.7 0.00202 2023 $10,203 $39,357 $49,560
4" 9.8 0.00257 2570 $12,958 $49,983 $62,941
6" 14.7 0.00386 3865 $19,489 $75,171 $94,660
8" 20.3 0.00534 5342 $26,937 $103,902 $130,839
*Demand (MGD) based on average actual winter (January - March) use in CY 2013 Multifamily (per unit)** Demand (MGD) Demand (GPD) Collection Treatment Total Proposed
Impact Fee
**Based on 85% of 1" and below demand 0.00022 224 $1,127 $4,349 $5,476 1 ADWF = "Average Dry Weather Flow"
2 MGD = "Million Gallons per Day"
3 GPD = "Gallons per Day"
11 Storm Drainage Proposed Impact Fees
Table 5 shows the storm drainage impact fee calculation. Based on the City of Patterson Storm Drainage Master Plan 2018, Appendix B, the City of Patterson is projected to have an additional 7,153 gross acres, of which 1,601 acres will be impervious. The total storm drainage facilities projected to serve new development amounts to approximately $73 MM. The current service area contains 6,500 housing units, 5.8 MM square feet of industrial floor area and 640,000 square feet of commercial floor area.
Storm Drain Impact Fee Nexus
Based on the City’s 2015 Urban Water Management Plan, the City is expected to have 15,651 additional housing units, 12.2 MM square feet of additional industrial floor area, 12 MM square feet of additional commercial floor area and 6 MM of park, open space and public space. BWA classified impervious acreage based on each of these customer categories. Total capital facilities were allocated to each customer class based on its share of impervious acreage and divided by billable units to determine a charge of $2,535 per dwelling unit and a charge per square foot for each nonresidential class.
Appendix B shows a regional storm drainage impact fee survey. 12 Table 5
City of Patterson
Storm Drainage Impact Fee Calculation
Future Acreage Acreage
Gross Future 7,153
Impervious Acreage 1,601
Source: City of Patterson Storm Drainage Master Plan 2018, Appendix B Future System Impervious Acreage 1,601
Future System Impervious Square Footage 69,737,905
Facilities to Serve New Development
(Table 5-4 Storm Drainage Master Plan) $73,096,984
Customer Category % Impervious Gross Future Acres Impervious Future Future Sq. ft.
Estate Res. 6.0% 1,084 65 47,219,040
Gen Comm 50.0% 460 230 20,033,244
Heavy Industrial 44.0% 375 165 16,330,644
HDR 38.0% 14 5 609,840
Highway SVC Comm 50.0% 47 23 2,025,540
Light Industrial 44.0% 624 275 27,185,796
LDR 19.0% 3,755 713 163,554,732
MDR 32.0% 0 0 13,068
Mixed Use (Hillside) 656 85 28,562,292
Park / Open Space 6.0% 43 3 1,855,656
Public/Quasi-Public 38.0% 96 37 4,190,472
7,153 1,601 311,580,324
Customer Type
Current
Service Area Buildout* Additional
Impervious
Future Acres
% Impervious
Future Cost Allocation Current Fee Proposed Fee
Housing Units 6,500 22,151 15,651 869 54% $39,681,053 $5,379 $2,535 Park / Open Space / Public / Quasi-Public (sq. ft.) 6,046,128 39 2% $1,785,782 $0.00 $0.30 Industrial Floor Area (sq. ft.) 5,800,000 17,991,605 12,191,605 440 27% $20,069,502 $4.11 $1.65 Commercial Floor Area (sq. ft.) 640,000 12,633,175 11,993,175 253 16% $11,560,647 $3.62 $0.96 1,601 100% $73,096,984
*2015 Urban Water Management Plan, Section 3.3
13 APPENDIX A
Additional Supporting Tables
14 Table 1 City of Patterson
Water Capital Improvement Program
2020 2021 2022 2023 2024 2025 2026 2027 2028 2028-2035 2035-2040 After 2040 New 1.25 MG Storage Tank (Zone 2) ST-2 10-year 2,654,000 2,654,000 0 2,654,000 New pipeline to serve the new Zone 2 (Arambel) tank. WM-ST-0 5-year 1,212,000 1,212,000 0 1,212,000 Add a pump station to pressure zone 2 at the new Zone 2 (Arambel) tank to meet
demand/pressure requirements. PS-0 5-year 1,487,000 1,487,000 0 1,487,000 Add a pump to pressure zone 2 at the new wellfield tank to meet flow requirements. PS-1 10-year 1,724,000 1,724,000 0 1,724,000 Construct a new well in the northwest portion of the City serving Zone 2. WL-1 10-year 3,656,000 3,656,000 0 3,656,000 New percolation ponds to capture and recharge stormwater from Del Puerto Creek. PP-1 5-year 100,000 2,723,000 2,805,000 2,789,000 8,417,000 0 8,417,000 Replace 4240 lf of existing pipe with 4-inch. 6-inch, 8-inch, 10-inch, 12-inch and 16-inch pipe WM-2 Existing Need 1,639,000 1,639,000 1,068,000 571,000 Replace around 17,750 lf of existing pipe with 4, 6, 8 and 10-inch pipe and install around
1,000 lf or new 6 and 8-inch pipe. WM-6B Existing Need 5,811,000 5,811,000 5,510,000 301,000 Upsize 1725 lf of existing pipe with 12-inch pipe and install 68 lf of new 12-inch pipe WM-9 10-year 839,000 839,000 0 839,000 Upsize 1731 lf of existing pipe with 12-inch pipe and upsize 1393 lf with 16-inch pipe. WM-11 Existing Need 1,680,000 1,680,000 0 1,680,000 Install 813 lf of new 10-inch pipe and 7735 lf of new 12-inch pipe WM-12 5-year 4,559,000 4,559,000 0 4,559,000 Install 5247 lf of new 12-inch pipe. WM-13 5-year 1,672,000 1,672,000 0 1,672,000 Install 2713 lf of new 12-inch pipe WM-14 5-year 2,578,000 2,578,000 0 2,578,000 Install 5540 lf of new 8-inch and 10500 lf of new 12-inch pipe WM-15 5-year 4,952,000 4,952,000 0 4,952,000 Install 4440 lf of new 8-inch pipe, 7040 lf of new 12-inch pipe and 2350 lf of new
16-inch pipe. WM-16 5-year 4,074,000 4,074,000 0 4,074,000 Install 1459 lf of new 10-inch pipe WM-17 10-year 414,000 414,000 0 414,000 Install 8080 lf of new 12-inch pipe WM-18 10-year 3,228,000 3,228,000 0 3,228,000 Install 6870 lf of new 12-inch pipe WM-19 10-year 5,015,000 5,015,000 0 5,015,000 Install 9139 lf of new 16-inch pipe WM-20 10-year 4,899,000 4,899,000 0 4,899,000 Install 9450 lf of new 12-inch pipe and 670 lf of new 16-inch pipe. WM-21 10-year 5,946,000 5,946,000 0 5,946,000 Construct a new well serving Zone 1. WL-2 Buildout 4,431,000 4,431,000 0 4,431,000 Construct 4 new wells in the northwest portion of the City serving Zone 2. WL-3 Buildout 4,160,000 4,479,000 10,384,000 19,023,000 0 19,023,000 New 3.0 MG Storage Tank (Zone 1) ST-BO1 Buildout 7,389,000 7,389,000 0 7,389,000 New 2.0 MG Storage Tank (Zone 2) ST-BO2 Buildout 4,651,000 4,651,000 0 4,651,000 New 2.25 MG Storage Tank (Zone 4) ST-BO3 Buildout 5,333,000 5,333,000 0 5,333,000 Add a pump to serve the tank in the new pressure zone (Zone 4) in the
western hills. PS-BO-1 Buildout 2,231,000 2,231,000 0 2,231,000 Install 234,384 lf of new pipe WM-BO Buildout 33,389,000 35,950,000 41,676,000 111,015,000 0 111,015,000 Construct a new tertiary filtration system at the WQCF to produce Title 22 compliant
recycled water. TT-1 10-year 2,330,000 2,330,000 0 2,330,000 Install 300 lf of new 6-inch 2500 lf of new 10-inch non-potable pipe NP-1 5-year 832,000 832,000 0 832,000 Install 1060 lf of new 4-inch and 5900 lf of new 12-inch nonpotable pipe NP-2 5-year 2,655,000 2,655,000 0 2,655,000 Install 7550 lf of new 4-inch and 6770 lf of new 8-inch non-potable pipe NP-3A Buildout 4,819,000 4,819,000 0 4,819,000 Install 2600 lf of new 4-inch nonpotable pipe NP-3B Buildout 809,000 809,000 0 809,000 Install 7590 lf of new 8-inch and 2630 lf of new 10-inch and 1200 lf of new 12-inch non-potable pipe. NP-4 5-year 5,147,000 5,147,000 0 5,147,000 Install 11292 lf of new 12-inch nonpotable pipe NP-5 10-year 4,750,000 4,750,000 0 4,750,000 Install 7910 lf of new 12-inch nonpotable pipe to connect nonpotable system to the
WCQF. NP-6 10-year 3,476,000 3,476,000 0 3,476,000 Total Projects 8,483,000 8,501,000 11,499,000 13,763,000 7,539,000 10,364,000 6,409,000 8,243,000 10,845,000 41,980,000 46,057,000 71,664,000 245,347,000 6,578,000 238,769,000 Deficiency/Maintenance Total 0 0 1,068,000 5,510,000 0 0 0 0 0 0 0 0 6,578,000 Future 5-year 10-year Buildout System
Project Project Number Notes Estimated
Project Cost
Existing
Deficiency
15 Table 2
City of Patterson
Sewer Capital Improvement Program
Collection System Buildout Improvements - Alternative 2 - NPTS/SPTS Force Mains to IPS Construct North Patterson Trunk Sewer (Segments N1-N7.2A) CS-NPTS 5,699,484 5,699,484 Construct North Patterson Pump Station CS-NPLS 1,230,390 1,230,390 Construct North Patterson Force Main CS-NPFM 908,901 908,901 Construct South Patterson Trunk Sewer (Segments S1-S10.2A) CS-SPTS 7,733,597 7,733,597 Construct South Patterson Pump Station CS-SPLS 1,270,080 1,270,080 Construct South Patterson Force Main CS-SPFM 1,260,158 1,260,158 Construct Orange Avenue Extension and abandon FSLS CS-OAE 206,388 206,388 Relocate Diablo Grande sewer to SPTS CS-DG 99,225 99,225 Construct Junction Structure at NPLS/SPLS confluence CS-JCT 1,964,655 1,964,655 20,372,878 20,372,878
WQCF Near-Term Improvements
Flow Splitter / IPS Improvements (2014/15 CIP) - - WQCF Phase III Expansion 16,777,100 16,777,100 WQCF Security and Access Improvements 125,000 125,000
SCADA Computer System Improvements (2014/15 CIP) - - Expand Maintenance Building 250,000 250,000 Percolation Pond Hydraulic Improvements 316,800 316,800 Solids Dewatering Improvements 1,476,000 1,476,000
Construct Equalization Basin and Automatic High Flow Diversion 421,875 421,875 Wastewater Master Plan 125,000 125,000
Grit Removal Facilities 1,125,000 1,125,000
South Ditch Clarifier 500,000 500,000
Construct Tertiary Filters 2,952,000 2,952,000
Disinfection Facilities 1,728,000 1,728,000
25,796,775 25,796,775
WQCF Buildout Improvements
Phase IV WQCF Improvement Project 22,200,881 22,200,881 Phase V WQCF Improvement Project 16,688,191 16,688,191
Tertiary Filtration (2 phases) 6,912,000 6,912,000
Disinfection Facilities (2 phases) 6,984,000 6,984,000
52,785,072 52,785,072
Total Projects 25,796,775 73,157,950 98,954,725
Source: City of Patterson Wastewater Master Plan 2016 & Project Estimated Costs Revised October & November 2018 Estimated
Project Cost Project Project Number Near Term Buildout
16 Table 3
City of Patterson
Storm Drainage Capital Improvement Program
Construction of Detention Basins and Percolation Basins DET 01A (28.8 AF, plus 6.0 AF add'l excavation) 34.8 AF $10,000 $348,000 DET 02 (2.1 AF, plus 6.0 AF add'l excavation) 2.9 AF $10,000 $29,000 DET 06 (12.0 AF, plus 2.8 AF add'l excavation) 14.8 AF $10,000 $148,000 DET 08 (5.9 AF, plus 1.6 AF add'l excavation) 7.5 AF $10,000 $75,000 DET 09 (15.7 AF, plus 3.6 AF add'l excavation) 19.3 AF $10,000 $193,000 DET 10A (30.4 AF, plus 6.4 AF add'l excavation) 36.8 AF $10,000 $368,000 DET 11 (33.2 AF, plus 6.8 AF add'l excavation) 40 AF $10,000 $400,000 DET 12 (19.4 AF, plus 4.4 AF add'l excavation) 23.8 AF $10,000 $238,000 DET 13 (28.4 AF, plus 6.0 AF add'l excavation) 34.4 AF $10,000 $344,000 DET 14 (10.9 AF, plus 2.8 AF add'l excavation) 13.7 AF $10,000 $137,000 DET 15 (14.1 AF, plus 3.2 AF add'l excavation) 17.3 AF $10,000 $173,000 DET 26 (16.1 AF, plus 3.6 AF add'l excavation) 19.7 AF $10,000 $197,000 DET 27 (20.4 AF, plus 4.8 AF add'l excavation) 25.2 AF $10,000 $252,000 DET 29C (4.4 AF, plus 1.6 AF add'l excavation) 6 AF $10,000 $60,000 DET 33A (39.5 AF, plus 11.6 AF add'l excavation) 51.1 AF $10,000 $511,000 DET 39A (16.5 AF, plus 4.8 AF add'l excavation) 10.65 AF $10,000 $106,500 DET 39B (17.3 AF, plus 4.8 AF add'l excavation) 22.1 AF $10,000 $221,000 DET 40 (28.8 AF, plus 8.4 AF add'l excavation) 37.2 AF $10,000 $372,000 DET 43 (6.8 AF, plus 2.4 AF add'l excavation) 9.2 AF $10,000 $92,000 DET 44 (58.0 AF, plus 16.0 AF add'l excavation) 74 AF $10,000 $740,000 DET 45 (17.9 AF, plus 5.6 AF add'l excavation) 23.5 AF $10,000 $235,000 DET 46 (17.1 AF, plus 5.6 AF add'l excavation) 22.7 AF $10,000 $227,000 DET 47 (12.9 AF, plus 4.4 AF add'l excavation) 17.3 AF $10,000 $173,000 DET 48 (18.5 AF, plus 5.6 AF add'l excavation) 24.1 AF $10,000 $241,000 DET 01A Pump Station (9.0 cfs capacity) 1 LS $900,000 $900,000 DET 08 Pump Station (2.3 cfs capacity) 1 LS $350,000 $350,000 DET 14 Pump Station (3.1 cfs capacity) 1 LS $350,000 $350,000 DET 15 Pump Station (3.8 cfs capacity) 1 LS $500,000 $500,000 DET 46 Pump Station (2.7 cfs capacity) 1 LS $350,000 $350,000 DET 47 Pump Station (1.9 cfs capacity) 1 LS $350,000 $350,000 Construction of Storm Drains (SDs) and Storm Drain Outfalls (SDOs) 18" SD (RCP) 11,475 LF $100 $1,147,500
24" SD (CIPCP) 33,925 LF $110 $3,731,750
30" SD (CIPCP) 22,850 LF $150 $3,427,500
36" SD (CIPCP) 9,925 LF $180 $1,786,500
42 SD (CIPCP) 1,425 LF $210 $299,250
42" SD (RCP, Bore & Jack) 100 LF $800 $80,000
60" SD (CIPCP) 1,500 LF $300 $450,000
15" SDO (RCP) 4,850 LF $75 $363,750
18" SDO (RCP) 11,050 LF $100 $1,105,000
24" SDO (CIPCP) 23,200 LF $110 $2,552,000
24" SDO (RCP, Bore & Jack) 200 LF $650 $130,000
30" SDO (CIPCP) 7,350 LF $150 $1,102,500
36" SDO (CIPCP) 8,750 LF $180 $1,575,000
36" SDO (RCP, Bore & Jack) 200 LF $750 $150,000
48" SDO (CIPCP) 500 LF $240 $120,000
FACILITIES NEEDED TO SERVE NEW DEVELOPMENT QTY UNIT UNIT COST TOTAL COST 17 Table 3
City of Patterson
Storm Drainage Capital Improvement Program (Continued)
Other Items
Dewatering 1 LS $3,500,000 $3,500,000
CNRR Crossing Agreements 4 EA $5,000 $20,000
Delta Mendota Canal Crossing Agreements 3 EA $5,000 $15,000 Future SDMP's/Updates 1 LS $200,000 $200,000
3-72" RCP Crossing of CNRR (Bore & Jack, Salado Creek) 60 LF $1,200 $72,000 Concrete Lined Channel at CNRR (Salado Creek) 90 CY $1,500 $135,000 Enlarge Collection Area & Trash Grate @ 96" SD Inlet CNRR (Salado Creek) 1 LS $200,000 $200,000 Open Channel (Salado Creek, DMC to Existing Open Channel ) 4,500 LF $100 $450,000 Bolt Down Manhole Covers Existing 96" SD 1 LS $25,000 $25,000 Subtotal of Construction Items $31,318,250
Mobilization and Demobilization @ 3% of Subtotal of Construction Items $939,548 Construction Cost Subtotal $32,257,798
Contingencies @ 30% of Construction Cost Subtotal $9,677,339 Construction Cost Total $41,935,137
Engineering, Administration & Legal Costs @ 27% of Construction Cost $11,322,487 Capital Improvement Cost Total $53,257,624
Land Acquisition
DET 01A 7.5 AC $125,000 $937,500
DET 02 1.0 AC $125,000 $125,000
DET 06 4.0 AC $125,000 $500,000
DET 08 2.0 AC $125,000 $250,000
DET 09 4.5 AC $125,000 $562,500
DET 10A 8.0 AC $125,000 $1,000,000
DET 11 8.5 AC $125,000 $1,062,500
DET 12 5.5 AC $125,000 $687,500
DET 13 7.5 AC $125,000 $937,500
DET 14 3.5 AC $125,000 $437,500
DET 15 4.0 AC $125,000 $500,000
DET 26 4.5 AC $125,000 $562,500
DET 27 6.0 AC $125,000 $750,000
DET 29C 2.0 AC $125,000 $250,000
DET 33A 14.5 AC $125,000 $1,812,500
DET 39A 3.0 AC $125,000 $375,000
DET 39B 6.0 AC $125,000 $750,000
DET 40 10.5 AC $125,000 $1,312,500
DET 43 3.0 AC $125,000 $375,000
DET 44 Expansion 20.0 AC $125,000 $2,500,000
DET 45 7.0 AC $125,000 $875,000
DET 46 7.0 AC $125,000 $875,000
DET 47 5.5 AC $125,000 $687,500
DET 48 7.0 AC $125,000 $875,000
Open Channel (Salado Creek, DMC to Existing Open Channel) 6.7 AC $125,000 $839,360 Subtotal, Land Acquisition $19,839,360
Capital Improvement Cost Total Including Land Acquisition $73,096,984 Source: Storm Drainage Master Plan, Table 5-4
FACILITIES NEEDED TO SERVE NEW DEVELOPMENT QTY UNIT UNIT COST TOTAL COST 18 APPENDIX B
Regional Impact Fee Surveys
19 20
21 22
APPENDIX C
Accessory Dwelling Units
23 Proposed Accessory Dwelling Unit (ADU) Fees: Recently enacted state law, Government Code Section 65852.2 (SB 1069) effective January 1, 2018, requires that the fees charged to ADUs must proportionately account for impact on services based on the ADU’s size or number of plumbing fixtures. The proposed fee would apportion the ADU fees based on the number of plumbing fixtures in the ADU as compared with the number of plumbing fixtures in a typical single-family home.
Plumbing fixtures for sanitary sewer are described in Chapter 7 of the CA Plumbing Code (Appendix D) using the terminology Drainage Fixture Units (DFUs). The DFU ratings for common plumbing devices (e.g., sinks, toilets, etc.) are listed in Table 702.1 in the California Plumbing Code. For example, a kitchen sink is rated 2 DFUs while a 1.6 gallon per flush (gpf) toilet is rated 3 DFUs. Table 1 summarizes the DFU calculation for a typical 3-bedroom, 2-bath house. The calculation of 19 DFUs includes two bathroom (lavatory) sinks, two toilets, a kitchen sink, a dish washer and a clothes washer.
Table 2 summarizes an example calculation for a hypothetical ADU containing a kitchen sink, bathroom (lavatory) sink, 1.6 gpf toilet and a shower. The ADU in this example would have a rating of 8 DFUs. The capacity and connection fees assigned the ADU in this example would be 8/19 times (or 42% of) the singlefamily residential fees.
Table 1
City of Patterson
Calculation of Typical Single Family Residence (2 bathroom) Drainage Fixture Unit (DFU) Value Fixture Type Quantity DFU (1) Total DFU
Bathtub(with or without shower) 1 2 2
Clothes Washer 1 3 3
Dishwasher 1 2 2
Lavatory 2 1 2
Shower (single) 1 2 2
Kitchen Sink 1 2 2
Toilet (1.6 gal per flush) 2 3 6
19 1. DFU=Drainage Fixture Units as defined in Chapter 7 of the CA Plumbing Code DFU's in a Typical Single Family Residence
24 ADU Capacity and Connection Fees per DFU: Dividing the current SFR capacity and connection fees by the typical 19 DFUs yields the following fees on a DFU basis (Table3):
Table 2
City of Patterson
Example Calculation of ADU (1 bathroom) Drainage Fixture Unit (DFU) Value Fixture Type Quantity DFU (1) Total DFU
Bathtub(with or without shower) 0 2 0
Clothes Washer 0 3 0
Dishwasher 0 2 0
Lavatory 1 1 1
Shower (single) 1 2 2
Kitchen Sink 1 2 2
Toilet (1.6 gal per flush) 1 3 3
8 1. DFU=Drainage Fixture Units as defined in Chapter 7 of the CA Plumbing Code DFU's in Example ADU
Table 3
City of Patterson
Calculation of Fixture Units & Square Footage Costs for ADUs Customer Category
Proposed
$/EDU $/Fixture Unit
Example (8
Fixture Units)
SFR Water $10,678 $562 $4,496
SFR Sewer Collection System $1,326 $70 $559
SFR Sewer Treatment $5,116 $269 $2,154
Proposed
$/EDU
$/Square Foot of
Imprevious Area*
Example (800
Square Feet)
SFR Storm Drain $2,535 $1.05 $839
*Calculated by dividing storm drain costs allocated to residential customers by future impervious area in Table 5 25 APPENDIX D
Plumbing Code
26