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TABLE 8
<br />Stormwater Drainage Systems Development Charge Analysis
<br />1. Existing Stormwater Drainage System Value & SDC -Eligible Costs
<br />(Reimbursement Fee)
<br />Total Replacement Cost - Existing Pipe System
<br />$322,532,528
<br />Tota[ Replacement Cost - Existing Oen Channel Systems
<br />$92,194,101
<br />Total Replacement Cost, Existing (Replacement Cost New)
<br />$414,726,629
<br />Percent of Existing Pipe System to be Used by New Development
<br />4.27%
<br />Percent of Existing Oen Channels stem to Used by New Development
<br />2.34%
<br />Tota[ SDC -Eligible Cost - Existing Pipe*
<br />$13,772,140
<br />Tota[ SDC -Eligible Cost - Existing Open Channel Systems*
<br />$2,157,341
<br />Total SDC -Eligible Cost, Existing System
<br />` Based on percent available capacity per hydraulic model
<br />$15,929,481
<br />2. Future Stormwater System SDC -Eligible Project Costs
<br />(Improvement Fee)
<br />Total Est. Cost, Future System (SDC -Eligible Projects)
<br />(From Table 9) $39,324,665
<br />SDC -Eligible Portion of Project Cost, Future System (excluding LID capacity)
<br />(From Table 9) $17,540,4771
<br />SDC -Eligible Portion of Project Cost for Future System LID Capacity
<br />(From Table 9) $7,942,971
<br />3. Stormwater System Calculation Details
<br />Single -Family Dwelling SFD), estimated average impervious surface area
<br />Unit Cost per Square Foot, Improvement Fee
<br />Small Residential (building footprint < 1,000 sq. ft.)
<br />1,800 sq. ft.
<br />Medium Residential (building footprint >1,000 sq. ft. and < 3,000 sq.ft.)
<br />2,900 sq. ft.
<br />Mfg. Home Park Space, estimated average impervious surface area
<br />1,780 sq. ft.
<br />Total Additional Impervious Surface Area within UGB (build -out)
<br />1155,770,560 sq. ft.
<br />Total Additional Impervious Surface Area within UGB (build -out) requiring LID capacity
<br />1 4,650,000 sq. ft.
<br />4. Calculation of SDC*
<br />Unit Cost per Square Foot, Improvement Fee
<br />[$17,540,477 / 155,770,5601
<br />$0.1126
<br />Unit Cost per Square Foot, Improvement Fee for LID capacity component
<br />[$7,942,971 / 4,650,0001
<br />$1.7082
<br />Unit Cost per Square Foot, Reimbursement Fee
<br />[$15,929,481 / 155,7.70,5601
<br />$0.1023
<br />Total Unit Cost per Square Foot for General Capacity [Improvement + Reimbursement]
<br />$0.2138
<br />Total Unit Cost per Square Foot with LID component [Improvement + LID + Reimbursement]
<br />$1.9219
<br />Small Residential SDC (building footprint < 1,000 sq. ft.)
<br />[1,800 sq. ft. x $0.2138]
<br />$384.84
<br />Medium Residential SDC (building footprint >1,000 sq. ft. and < 3,000 sq.ft.)
<br />[2,900 sq.ft x $0.2138]
<br />$620.02
<br />Small Duplex SDC (unit building footprints < 1,000 sq. ft.)
<br />[$384.84 x 21
<br />$769.68
<br />Medium Duplex SDC (unit building footprints >1,000 sq. fi. and < 3,000 sq.ft.)
<br />[$620.02 x 2]
<br />$1,240.04
<br />Mfg. Home Park SDC per Space portion of total charge)
<br />[1,684 sq. ft. x $0.2138]1
<br />$360.04
<br />Small Residential SDC with LID (building footprint < 1,000 sq. ft.)
<br />[1,800 sq. ft. x $1.9219]
<br />$3,459.42
<br />Medium Residential SDC with LID (building footprint >1,000 sq. ft. and < 3,000 sq.ft.)
<br />[2,900 sq.ft x $1.92191
<br />$5,573.51
<br />Small Duplex SDC with LID (unit building footprints < 1,000 sq. ft.)
<br />[$3,398.00 x 2]
<br />$6,918.84
<br />Medium Duplex SDC with LID (unit building footprints >1,000 sq. ft. and < 3,000 sq.ft.)
<br />($5,475.20 x 2]
<br />$11,147.02
<br />Mfg. Home Park SDC per Space (portion of total charge) with LID
<br />[1,684 sq. ft. x $1.9219]1
<br />$3,236.48
<br />*See Appendix F for complete rate schedule.
<br />Page 8 of 25
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