Puget Sound Stormwater BMP Cost Database - Sound Stormwater BMP Cost Database . Prepared for . Washington State Department of Ecology . ... Constructed Wetland Grassed Swale Green

TECHNICAL MEMORANDUM

Puget Sound Stormwater BMP

Cost Database

Prepared for

Washington State Department of Ecology Environmental Assessment Program

P.O. Box 47600 Olympia, Washington 98504-7600

Prepared by

Herrera Environmental Consultants 2200 Sixth Avenue, Suite 1100

Seattle, Washington 98121 Telephone: 206.441.9080

January 4, 2012

dole461Typewritten TextSupplement to: Ecology Publication No. 13-03-009, "Case Study for Applying SUSTAIN to a Small Watershed in the Puget Lowland" at https://fortress.wa.gov/ecy/publications/SummaryPages/1303009.html

dole461Typewritten Text,

https://fortress.wa.gov/ecy/publications/SummaryPages/1303009.html

Note: Some pages in this document have been purposely skipped or blank pages inserted so that this document will copy correctly when duplexed.

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Contents

Introduction and Purpose ................................................................................................................ 1

Bioretention..................................................................................................................................... 2

Projects .................................................................................................................................... 2 Unit Costs ................................................................................................................................ 2 Total Bioretention Cost ............................................................................................................ 3

Cistern ............................................................................................................................................. 4

Projects and Products ............................................................................................................... 5 Total Cistern Cost .................................................................................................................... 5

Constructed Wetland ....................................................................................................................... 6

Projects .................................................................................................................................... 6 Unit Costs ................................................................................................................................ 6 Total Constructed Wetland Cost .............................................................................................. 7

Grassed Swale ................................................................................................................................. 7

Projects .................................................................................................................................... 7 Unit Costs ................................................................................................................................ 8 Total Grassed Swale Cost ........................................................................................................ 9

Green Roof ...................................................................................................................................... 9

Projects .................................................................................................................................... 9 Unit Costs .............................................................................................................................. 10 Total Green Roof Cost ........................................................................................................... 11

Infiltration Trench ......................................................................................................................... 11

Projects .................................................................................................................................. 11 Unit Costs .............................................................................................................................. 12 Total Infiltration Trench Cost ................................................................................................ 12

Porous Pavement ........................................................................................................................... 13

Projects .................................................................................................................................. 13 Unit Costs .............................................................................................................................. 13 Total Porous Pavement Cost .................................................................................................. 15

Rain Barrel .................................................................................................................................... 15

Projects and Products ............................................................................................................. 16 Total Rain Barrel Cost ........................................................................................................... 17

Vegetated Filter Strip .................................................................................................................... 17

Projects .................................................................................................................................. 17 Total Vegetated Filter Strip Cost ........................................................................................... 17

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Wet Pond ....................................................................................................................................... 18

Projects .................................................................................................................................. 18 Unit Costs .............................................................................................................................. 19 Total Wet Pond Cost .............................................................................................................. 20

Next Steps ..................................................................................................................................... 21

References ..................................................................................................................................... 21

Attachment 1 Master Puget Sound BMP Cost Database Attachment 2 Cost Request Forms Submitted for the Puget Sound BMP Cost Database

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Tables

Table 1. Bioretention project information................................................................................... 3 Table 2. Bioretention unit cost information. ............................................................................... 4 Table 3. Bioretention project cost information. .......................................................................... 4 Table 4. Cistern project and product information. ...................................................................... 5 Table 5. Cistern cost information. ............................................................................................... 5 Table 6. Constructed wetland project information...................................................................... 6 Table 7. Constructed wetland unit cost information. .................................................................. 6 Table 8. Constructed wetland project cost information. ............................................................. 7 Table 9. Grassed swale project information................................................................................ 8 Table 10. Grassed swale unit cost information. ............................................................................ 8 Table 11. Grassed swale project cost information. ....................................................................... 9 Table 12. Green roof project information. .................................................................................. 10 Table 13. Green roof unit cost information................................................................................. 10 Table 14. Green roof project cost information. ........................................................................... 11 Table 15. Infiltration trench project information. ....................................................................... 12 Table 16. Infiltration trench unit cost information. ..................................................................... 12 Table 17. Infiltration trench project cost information. ................................................................ 13 Table 18. Porous pavement project and product information. .................................................... 14 Table 19. Porous pavement unit cost information. ..................................................................... 15 Table 20. Porous pavement project cost information. ................................................................ 15 Table 21. Rain barrel project and product information. .............................................................. 16 Table 22. Rain barrel cost information. ...................................................................................... 17 Table 23. Vegetated filter strip project information. ........................................