Watershed Planning Workshop - Arlingtonva
Watershed Planning Workshop Upper Mainstem & Middle Four Mile Run November 30,, 2011 Fairlington Community Center
Arlington’s watersheds
Chesapeake Bay watershed
Watershed Planning
Initiated May 2008 Contracted to Center for Watershed Protection Result is an inventory of potential stormwater retrofit projects. Anticipates Chesapeake Bay clean clean--up requirements Part ato of Arlington’s gto s Sto Stormwater ate Master aste Plan a update
Stormwater Master Plan Update
Storm Sewer Capacity Analysis to study the County's current storm sewer pipes.
County--wide stream inventory to assess County stream conditions and prioritize stream restoration projects.
Watershed plans to identify locations where stormwater treatment facilities can be added to help slow down and filter polluted stormwater runoff.
Storm drain to local stream…
Water in storm drains does go to a treatment plant… p not g
To the Potomac River
On to the Chesapeake Bay
Sediment and Nutrients
Effect of Urbanization on Watersheds
Impervious surface Runoff speed and volume Water Quality Groundwater supply Stream Corridor Restoration, FISRWG, 1998
Effect of Urbanization on Watersheds
Severe streambank erosion and habitat degradation
Stormwater Retrofits A retrofit is a stormwater management g facility designed to slow and treat polluted y stormwater runoff that is currently uncontrolled.
Why Stormwater Retrofits?
Stormwater retrofits provide our best opportunities to improve watershed health, along with redevelopment and stream restoration.
Required q to meet Chesapeake p Bay y cleanclean-up p goals.
Why Stormwater Retrofits? Stormwater retrofits will help: Clean and filter pollutants from runoff Slow and temporarily store stormwater runoff Improve water quality in our local streams
Impervious cover in Arlington = 41% or 6875 acres
% Impervious Cover - 2009 County
41
Fairlington-Bradlee
44
Lucky Run
42
Bailey's Branch
52
Arlington Forest
38
Upper Long Branch
42
FMR Middle
42
FMR Upper 2 FMR Upper 1
33 36
Impervious cover in Arlington County - 2007
Alley 0.2%
Handicap ramp 0.1%
Airport 3.8%
Driveway 7.4%
Buildings 30 1% 30.1% Parking lot 15.7%
Paved median 0.6%
Sidewalks 8.4%
Roads 33.8%
Watershed Planning Status >600
projects identified 2 Green Streets projects constructed Multiple projects in design
Williamsburg Blvd median (Old Dominion to 35th St N)
Can Retrofits Alone Protect Our Streams? St ?
Time and funding limitations mean implementation will be incremental.
Arlington’s watersheds
Chesapeake Bay watershed
Watershed Planning
Initiated May 2008 Contracted to Center for Watershed Protection Result is an inventory of potential stormwater retrofit projects. Anticipates Chesapeake Bay clean clean--up requirements Part ato of Arlington’s gto s Sto Stormwater ate Master aste Plan a update
Stormwater Master Plan Update
Storm Sewer Capacity Analysis to study the County's current storm sewer pipes.
County--wide stream inventory to assess County stream conditions and prioritize stream restoration projects.
Watershed plans to identify locations where stormwater treatment facilities can be added to help slow down and filter polluted stormwater runoff.
Storm drain to local stream…
Water in storm drains does go to a treatment plant… p not g
To the Potomac River
On to the Chesapeake Bay
Sediment and Nutrients
Effect of Urbanization on Watersheds
Impervious surface Runoff speed and volume Water Quality Groundwater supply Stream Corridor Restoration, FISRWG, 1998
Effect of Urbanization on Watersheds
Severe streambank erosion and habitat degradation
Stormwater Retrofits A retrofit is a stormwater management g facility designed to slow and treat polluted y stormwater runoff that is currently uncontrolled.
Why Stormwater Retrofits?
Stormwater retrofits provide our best opportunities to improve watershed health, along with redevelopment and stream restoration.
Required q to meet Chesapeake p Bay y cleanclean-up p goals.
Why Stormwater Retrofits? Stormwater retrofits will help: Clean and filter pollutants from runoff Slow and temporarily store stormwater runoff Improve water quality in our local streams
Impervious cover in Arlington = 41% or 6875 acres
% Impervious Cover - 2009 County
41
Fairlington-Bradlee
44
Lucky Run
42
Bailey's Branch
52
Arlington Forest
38
Upper Long Branch
42
FMR Middle
42
FMR Upper 2 FMR Upper 1
33 36
Impervious cover in Arlington County - 2007
Alley 0.2%
Handicap ramp 0.1%
Airport 3.8%
Driveway 7.4%
Buildings 30 1% 30.1% Parking lot 15.7%
Paved median 0.6%
Sidewalks 8.4%
Roads 33.8%
Watershed Planning Status >600
projects identified 2 Green Streets projects constructed Multiple projects in design
Williamsburg Blvd median (Old Dominion to 35th St N)
Can Retrofits Alone Protect Our Streams? St ?
Time and funding limitations mean implementation will be incremental.
