Site Specific Recommendation Cost Estimate

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North Branch Park River Watershed Management Plan Site-Specific Recommendations Cost Worksheet

Design, and Planning Cost (2010$) Allowance

Unit Cost

Unit

Quantity

Bioretention in Traffic Island

$17.50

/ft2 (commercial/industri al area

2000

$35,000

Bioretention Area West of Parking Lot

$17.50

/ft2 (commercial/industri al area

1320

Water Quality Swale

$12.50

/ft2 (commercial/industri al area

Bioretention Area Conversion

$8.40

Bioretention Area Conversion

Order of Magnitude Cost Range

Annual Cost Lifespan Over O&M (yrs) Lifespan (% Cost)

O&M ($/yr)

Total Capitalized Cost/yr over lifespan

Source

Cost

Total Cost

-30%

50%

55%

$19,000

$54,000

$38,000

$81,000

15

$4,520

8%

$360

$4,880

1

$23,000

55%

$13,000

$36,000

$25,000

$54,000

15

$3,020

8%

$240

$3,260

1

5400

$68,000

55%

$37,000

$105,000

$74,000

$158,000

30

$5,360

6%

$320

$5,680

2

/ft2 (developed area)

2650

$22,000

55%

$12,000

$34,000

$24,000

$51,000

15

$2,850

8%

$230

$3,080

2

$8.40

/ft2 (developed area)

1150

$10,000

55%

$6,000

$16,000

$11,000

$24,000

15

$1,340

8%

$110

$1,450

2

$7.00

/ft2 (developed area)

276225

$1,934,000

32%

$619,000

$2,553,000

$1,787,000

$3,830,000

30

$130,250

8%

$10,420

$140,670

$4.00

/ft3 treated

10,600

$0.30 $1.75 $3.00 $2,000.00

/ft2 / ft2 /ft2 ea

70,000 8,200 3,000 1

$42,000 $21,000 $14,000 $9,000 $2,000

32% 32% 32% 32% 0%

$13,000 $7,000 $4,000 $3,000 $0

$55,000 $28,000 $18,000 $12,000 $2,000

$39,000 $20,000 $13,000 $8,000 $1,000

$83,000 $42,000 $27,000 $18,000 $3,000

30 50 50 20 50

$2,810 $1,090 $700 $810 $80

6% 0% 0% 0% 0%

$170 $0 $0 $0 $0

$2,980 $1,090 $700 $810 $80

3 1 1 1 1

Parking Lot Swale Stormwater basin Sediment Trap Reconstruct or replace dam Dredging Riparian plantings

$12.50 $4.00 $20,000.00 $200,000.00 $70.00 $10,000.00

/ft2 /ft3 treated ea. ea. cubic yard acre

2000 50000 1 1 3,000 0.5

$25,000 $200,000 $20,000 $200,000 $210,000 $5,000

32% 32% 32% 32% 32% 32%

$8,000 $64,000 $6,000 $64,000 $67,000 $2,000

$33,000 $264,000 $26,000 $264,000 $277,000 $7,000

$23,000 $185,000 $18,000 $185,000 $194,000 $5,000

$50,000 $396,000 $39,000 $396,000 $416,000 $11,000

30 30 30 30 30 30

$1,680 $13,470 $1,330 $13,470 $14,130 $360

8% 8% 10% 0% 0% 6%

$130 $1,080 $130 $0 $0 $20

$1,810 $14,550 $1,460 $13,470 $14,130 $380

2 2 5 5 5 1

University of Hartford Dam Removal* Replace dam with bridge Remove Sediment Riparian Plantings Bank stabilization Greenway

$1,500,000 $70 $10,000.00 $50 $3

ea. cubic yard acre ft ft2

1 7,000 2 1700 10,000

$1,500,000 $490,000 $20,000 $85,000 $30,000

32% 32% 32% 32% 32%

$480,000 $157,000 $6,000 $27,000 $10,000

$1,980,000 $647,000 $26,000 $112,000 $40,000

$1,386,000 $453,000 $18,000 $78,000 $28,000

$2,970,000 $971,000 $39,000 $168,000 $60,000

50 100 100 100 30

$76,950 $20,480 $820 $3,540 $2,040

8% 0% 0% 0% 6%

$6,160 $0 $0 $0 $120

$83,110 $20,480 $820 $3,540 $2,160

5 5 1 4 1

Bloomfield Town Hall

Hartford Seminary

Connecticut Historical Society Stormwater wetlands and grounds improvements

Laurel School Wet Detention Pond Tree planting on grassed area Reforestation of pavement Replace driveway Transplant tree Filley Park*

F:\P2007\1468\A10\Watershed Management Plan\Costs and Backup\cost ests drb20100625.xls

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