Federal Triangle Stormwater Drainage Study - National Capital ...

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Findings The June 2006 rainfall event was a flash flood. • Exceeded a 200-year storm event • Most of the rain fell within 5 hours 8
Findings Existing sewer system is not designed to absorb and discharge stormwater equal to a 200-year storm event in such a short period of time. • DC Water pumping stations were working • Combined sewer system was discharging the stormwater Potomac River was not at flood stage in June 2006 • The West Potomac Park Levee will not protect the <strong>Federal</strong> <strong>Triangle</strong> from interior drainage flooding 9
Page 1 and 2: Federal Triangle Stormwater Drainag
Page 3 and 4: Overview MULTI-AGENCY RESPONSE TO T
Page 5 and 6: Scope of the Study How did the sewe
Page 7: Existing Conditions The Federal Tri
Page 11 and 12: Findings Alternative 4 (Viable): Pr
Page 15 and 16: Important Considerations for Decisi
Page 17 and 18: How the Working Group will use the

Federal Triangle Stormwater Drainage Study - National Capital ...

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