FAQs • Prince George's County, MD • CivicEngage

What standard was our stormwater management system built to?: The standard depends on when it was developed. Portions of the community were developed prior to many of the stormwater regulations that exist today. The current County Standards can be found in the Drainage Design Manual. https://www.princegeorgescountymd.gov/DocumentCenter/View/4782/Stormwater-Management-Design-Manual-PDF?bidId=

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Current State of Tantallon Infrastructure (DPW&T/CEX)

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1. The American Society of Civil Engineers (ASCE) in its 2020 Infrastructure Report Card* rated Maryland’s stormwater infrastructure C (mediocre, needs attention). Is there a similar report card for: There is not an individual breakdown per County.

2. How old is the Tantallon stormwater infrastructure? How often is it inspected? When was it last inspected and what were the results of the inspection? (Failed drains & culvert at K-8 site): The infrastructure is built with the communities. It ranges in ages from approximately 70 years old to as recent as a few years old. There is not a set schedule (i.e., bridges or SWM facilities) but the County inspects approximately every 5-10 years. Developers are required to inspect all systems that they tie into.

3. What standard was our stormwater management system built to?: The standard depends on when it was developed. Portions of the community were developed prior to many of the stormwater regulations that exist today. The current County Standards can be found in the Drainage Design Manual. https://www.princegeorgescountymd.gov/DocumentCenter/View/4782/Stormwater-Management-Design-Manual-PDF?bidId=

4. Where are Tantallon Best Management Practices (BMPs) located?: Click the link to view the map identifying existing BMPs in the Swan Creek/Tantallon watershed demonstrating WQ and volume control. BMP’s (referring to Stormwater Management BMP’s) can be found on the following map through the Department of the Environment. https://www.arcgis.com/apps/webappviewer/index.html?id=dc168a43d3554905b4e4d6e61799025f

5. What is the water quality of Swan Creek?: The County is not required to provide water quality tests at the creek level. It is tested at the watershed level (i.e.: Potomac River)

6. What is the current quality of stormwater flowing into Swan Creek?: The County is not required to provide water quality tests at the creek level. It is tested at the watershed level (i.e.: Potomac River)

7. What is the boundary of Swan Creek watershed stormwater that flows through the National Golf Course?: Click the link to access the map that identifies existing BMPs in the Swan Creek/Tantallon watershed demonstrating WQ and volume controls. https://www.arcgis.com/apps/webappviewer/index.html?id=dc168a43d3554905b4e4d6e61799025f

8. Is the county in compliance with state and federal stormwater requirements? What is not in compliance?: The County is under a consent agreement from MDE/EPA to provide a designated number of acres of treatment for impervious surfaces not controlled by BMPs.

9. Does PG-DoE monitor rainfall? Where is our nearest monitoring station? Are we in compliance with air quality requirements?

DoE operates and monitors rainfall (precipitation) gauges in the Anacostia River and Western Branch Watersheds which fall in the north and central County. The nearest County operated gauge to Ft. Washington is at Water Street in Upper Marlboro. Private entities like Weather Underground and Weather Bug collect rainfall data in the Ft. Washington area.

EPA establishes national ambient air quality standards (NAAQS) for six common air pollutants - carbon monoxide, lead, ground-level ozone, particulate matter, nitrogen dioxide, and sulfur dioxide. (Awaiting MWCOG confirmation of the status of (non)attainment status for Washington metropolitan region).

10. What percent of Prince George’s County is impervious?: The County’s geographical area is approximately 490 square miles; Impervious is 48 Sq. Mi. = 9.8%

11. What percent of Tantallon is impervious?: Approximately 512 acres of ~ 1,188 acres = 43%.

12. Where exactly is the “Noon Property” that will benefit from K-8 tree replacement?: The Noon Property is near Avalon ES (7302 Webster Ln, Fort Washington, MD 20744). It is owned by PGCPS and used for off-site tree preservation credits. (When we take down trees on one site, we have the option of preserving, in perpetuity, trees on another site that would otherwise have been developed.)