Watershed Planning Watershed Planning Workshop Workshop Workshop Workshop Upper Upper Mainstem Upper Mainstem Upper Mainstem & Middle Mainstem & Middle & Middle & Middle Four Mile Run Four Mile Run November 30, 2011 November 30, 2011 , Fairlington Fairlington Community Center Community Center
Arlington’s watersheds Chesapeake Bay watershed watershed
Watershed Watershed Planning Watershed Watershed Planning Planning Planning Initiated May Initiated May Initiated May 2008 Initiated May 2008 2008 2008 Contracted to Center for Watershed Protection Contracted to Center for Watershed Protection Result is an inventory of potential Result is an inventory of potential Result is an inventory of potential stormwater Result is an inventory of potential stormwater stormwater stormwater retrofit projects. retrofit projects. Anticipates Chesapeake Bay clean Anticipates Chesapeake Bay clean Anticipates Chesapeake Bay clean up Anticipates Chesapeake Bay clean-up up up requirements requirements Part of Arlington’s Part of Arlington’s Stormwater a t o a t o gto s gto s Sto Stormwater Master Plan Sto ate ate Master Plan aste aste a a update update
Stormwater Stormwater Master Stormwater Stormwater Master Master Plan Update Master Plan Update Plan Update Plan Update Storm Sewer Capacity Analysis Storm Sewer Capacity Analysis Storm Sewer Capacity Analysis to study Storm Sewer Capacity Analysis to study to study to study the County's current storm sewer pipes. the County's current storm sewer pipes. County County wide stream inventory County County-wide stream inventory wide stream inventory to assess wide stream inventory to assess to assess to assess stream conditions and prioritize stream restoration stream conditions and prioritize stream restoration projects. projects. Watershed Watershed plans plans to identify locations where to identify locations where stormwater stormwater treatment facilities can be added to treatment facilities can be added to help slow down and filter help slow down and filter polluted polluted stormwater stormwater runoff. runoff.
Storm drain to local stream… Water in storm drains does not go to a treatment plant… g p To the To the Potomac River On to the Chesapeake Bay
Sediment and Nutrients Sediment and Nutrients
Effect of Urbanization on Watersheds Effect of Urbanization on Watersheds Impervious surface Runoff speed and volume Water Quality Groundwater supply supply Stream Corridor Restoration, FISRWG, 1998
Effect of Urbanization on Watersheds Effect of Urbanization on Watersheds
Severe streambank erosion and habitat degradation
Stormwater Stormwater Retrofits Stormwater Stormwater Retrofits Retrofits Retrofits A retrofit retrofit is a A is a stormwater stormwater management management g facility designed to facility designed to slow and treat polluted slow and treat polluted stormwater stormwater runoff runoff that is currently that is currently y uncontrolled. uncontrolled.
Why Why Why Stormwater Why Stormwater Stormwater Retrofits? Stormwater Retrofits? Retrofits? Retrofits? Stormwater Stormwater retrofits retrofits provide our best provide our best opportunities to improve watershed health, along opportunities to improve watershed health, along opportunities to improve watershed health, along opportunities to improve watershed health, along with redevelopment and stream restoration. with redevelopment and stream restoration. Required to meet Chesapeake Bay clean Required to meet Chesapeake Bay clean- q q p p y y -up up p goals. goals.
Why Why Why Stormwater Why Stormwater Stormwater Retrofits? Stormwater Retrofits? Retrofits? Retrofits? Stormwater retrofits will help: Stormwater Stormwater retrofits will help: Stormwater retrofits will help: retrofits will help: Clean and filter pollutants from runoff Clean and filter pollutants from runoff Slow and temporarily store Slow and temporarily store Slow and temporarily store stormwater Slow and temporarily store stormwater stormwater runoff stormwater runoff runoff runoff Improve water quality in our local streams Improve water quality in our local streams
Impervious cover in Arlington = 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 FMR Middle 42 42 FMR Upper 2 33 FMR Upper 1 36
Impervious cover in Arlington County - 2007 Airport Alley 0.2% 3.8% Handicap ramp 0.1% Driveway 7.4% Buildings 30 1% 30.1% Parking lot 15.7% Paved median 0.6% Sidewalks 8.4% Roads Roads 33.8%
Watershed Planning Status Watershed Planning Status Watershed Planning Status Watershed Planning Status >600 projects identified >600 projects identified 2 Green Streets projects constructed 2 Green Streets projects constructed Multiple projects in design Multiple projects in design Multiple projects in design Multiple projects in design Williamsburg Blvd median (Old Dominion to 35th St N) Williamsburg Blvd median (Old Dominion to 35th St N)
Can Retrofits Alone Protect Our Can Retrofits Alone Protect Our St St Streams? Streams? ? ? Time and funding limitations mean Time and funding limitations mean Time and funding limitations mean Time and funding limitations mean implementation will be incremental. implementation will be incremental. <10% of impervious area can be retrofitted <10% of impervious area can be retrofitted Retrofits alone cannot solve Retrofits alone cannot solve current flooding, current flooding, infrastructure and stream erosion problems. infrastructure and stream erosion problems. County must C C County must and will fund and implement t t t t and will fund and implement d d ill f ill f d d d i d i l l t t infrastructure infrastructure updates updates and and stream restoration stream restoration projects in addition to retrofits. projects in addition to retrofits. projects in addition to retrofits. projects in addition to retrofits. Implementation on private property is essential Implementation on private property is essential for significant change for significant change for significant change for significant change.
StormwaterWise StormwaterWise Landscapes Landscapes Incentive Program Incentive Program
Rain Garden Homeowner retrofit examples Homeowner retrofit examples Cistern
Green roofs
Homeowner retrofit examples Homeowner retrofit examples Homeowner retrofit examples Homeowner retrofit examples Rain Barrel(s) Pervious Pavement
Questions?? Questions?? Questions?? Questions?? Christin Jolicoeur, Watershed Planner Christin Jolicoeur, Watershed Planner Christin Jolicoeur, Watershed Planner Christin Jolicoeur, Watershed Planner Phone Phone: (703) 228 : (703) 228- -3588 3588 Email: Email: Email: Email: cjolicoeur@arlingtonva.us cjolicoeur@arlingtonva us cjolicoeur@arlingtonva.us cjolicoeur@arlingtonva us Web: Web: www.arlingtonva.us www.arlingtonva.us Residents Residents Residents Residents Environment Environment Watershed Management Watershed Management Watershed Management Watershed Management
To Learn More To Learn More Stormwater Stormwater Master Plan Update Master Plan Update h ttp://www.co.arlington.va.us/departments/EnvironmentalServices/epo/page74076.aspx ttp://www.co.arlington.va.us/departments/EnvironmentalServices/epo/page74076.aspx Watershed Retrofit Planning Watershed Retrofit Planning Watershed Retrofit Planning Watershed Retrofit Planning www.arlingtonva.us/departments/EnvironmentalServices/epo/page67082.aspx www.arlingtonva.us/departments/EnvironmentalServices/epo/page67082.aspx StormwaterWise StormwaterWise Landscapes Landscapes www.arlingtonva.us/stormwaterwise www.arlingtonva.us/stormwaterwise Rain Rain Gardens for Homeowners Gardens for Homeowners Workshops Workshops http://www.novaregion.org/index.aspx?NID=977 htt http://www.novaregion.org/index.aspx?NID=977 htt // // i i /i d /i d ?NID 977 ?NID 977 Rain Barrel Workshops & Sales Rain Barrel Workshops & Sales http http:// http http:// ://www arlingtonenvironment org/barrel php ://www.arlingtonenvironment.org/barrel.php www arlingtonenvironment org/barrel php www.arlingtonenvironment.org/barrel.php Green It! Workshop Series Green It! Workshop Series http://www.arlingtonva.us/portals/topics/Climateevents.aspx http://www.arlingtonva.us/portals/topics/Climateevents.aspx p p g g p p p p p p Like us on Like us on Facebook Facebook! ! www.facebook.com/#!/ArlingtonDES www.facebook.com/#!/ArlingtonDES
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