HomeMy WebLinkAboutSDP200600112 Correspondence 2006-11-16 Siku Rai
Dominion Development Resources
172 South Pantops Drive
Charlottesville, VA 22911 f a it 1 e rid
November 16, 2006 A Growing idea in Stgmtwater Nitration,
Plan Review of Filterra®
Dominion Office Park Filterra® Project
Albemarle County, VA
Dear Sirs
Thank you for submitting the partial plans on 08 November 2006 for our review of the
Dominion Office Park project. The original Filterra®will be relocated during this new
construction.
Filterra®structure F2 (6x6)was studied for;
• Planned Filterra®box size
• Filterra®contributing drainage area meeting project's regional sizing specification
• Spot elevations(TC) for Filterra® and bypass relief
•Filterra® invert elevations are 3.5' below TC
• Filterra® invert elevations are higher than effluent invert elevations
•The bypass is lower than the Filterra® elevation(spot elevations)
•The grading pattern encourages cross linear flow and not head-on flow
•The Filterra®outlet drain pipe is sized correctly and exits perpendicular to the wall
• For any conflicting structures such as storm drain pipes below Filterra®
• For most efficient placement of Filterra®units
•4-6"opening throat detail and standard notes on plans
The plan review concluded that the Filterra®structure listed above was sited and sized
appropriately to treat stormwater to our published specifications.
Operational consistency with these specifications is contingent upon the stormwater unit
being installed correctly and according to the plans, as well as regular maintenance being
performed.
Yours sincerely
Dean Baddorf
Filterra�? Stormwater Bioretention Filtration System
Manufactured by Americast T:(804)798-6068 �� ,
11352 Virginia Precast Road F:(804)798-8400 •
Ashland,VA 23005 E:design@filterra.com www.filterra.com