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Rendering of 17th Street Levee temporary closure structure.

Rendering of 17th Street Levee temporary closure structure. (Photo by USACE)

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One mouth (approximately 10 feet tall) of the 17th Street Closure, Potomac Levee Project, Washington, D.C., Aug. 11, 2014. This project will protect critical infrastructure downtown like the Federal Triangle from potential flooding of the Potomac River.

One mouth (approximately 10 feet tall) of the 17th Street Closure, Potomac Levee Project, Washington, D.C., Aug. 11, 2014. This project will protect critical infrastructure downtown like the Federal Triangle from potential flooding of the Potomac River. (Photo by Sarah Gross)

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Photo showing location of 17th Street closure

Photo showing location of 17th Street closure (Photo by USACE Courtesy Photo)

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An example post and panel closure structure, similar to the 17th Street Levee temporary closure structure.

An example post and panel closure structure, similar to the 17th Street Levee temporary closure structure. (Photo by USACE)

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Stone cladding on the permanent levee was designed to blend in with the historic landscape of the National Mall.

Stone cladding on the permanent levee was designed to blend in with the historic landscape of the National Mall. (Photo by Sarah Gross)

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17th Street Levee project site map.

17th Street Levee project site map. (Photo by USACE)

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Rendering of 17th Street Levee with posts in place.

Rendering of 17th Street Levee with posts in place. (Photo by USACE)

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Rendering of 17th Street Levee

Rendering of 17th Street Levee (Photo by USACE)

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AUTHORIZATION: Washington, DC & Vicinity Local Flood Protection Project - Flood Control Act of 1936 and 1946; Section 301 of the Water Resources Development Act (WRDA) of 1996 authorized project modifications per the 1992 General Design Memorandum (GDM); and Section 309 of WRDA 1999 increased authorized project cost to $5.965 million (Oct. 1997 price levels).

TYPE OF PROJECT: Flood Risk Management

PROJECT PHASE: Construction

CONGRESSIONAL INTEREST: Delegate Holmes-Norton (D.C.) 

NON-FEDERAL SPONSOR: N/A – the project is located on Federal lands.

BACKGROUND: The currently authorized unconstructed project modifications are to provide flood risk management measures for the 700,000 cfs flood event. The original project completed in 1939 was to provide risk management measures for the 100-year flood event consisting of:  levee between the Lincoln Memorial and the Washington Monument; a raised section of P Street SW, adjacent to Fort McNair; and three temporary sandbag closures.  The closures are located at 23rd Street and Constitution Avenue, NW; 17th Street and Constitution Avenue, NW; and 2nd and P Street, SW.  In January 2007, the Corps determined that the sandbag and Jersey barrier closure at 17th Street was an unreliable closure and issued the National Park Service an unacceptable levee inspection rating.  As a result of this rating, FEMA “de-accredited” the levee as safely containing the 100-year flood event. Sept. 27, 2010, FEMA released new Flood Insurance Rate Maps (FIRM) that show the entire Washington downtown area without flood protection. The City initiated design of a more reliable post & panel closure structure across 17th Street, resulting from FEMA FIRM revisions. The Corps received American Recovery and Reinvestment Act funds to finalize design and award the construction contract for the new 17th Street closure.   A Congressionally-authorized cost increase is needed to complete the remaining authorized unconstructed features of work that will: eliminate the temporary closure at 23rd Street and at 2nd and P Street; raise the Potomac Park Levee to a uniform elevation to provide an increased level of freeboard protection (3.5 feet); and provide three drainage control structures to prevent backflow through the existing storm water sewer system.

STATUS: Construction contract to build the 17th Street closure in the amount of $4.6 million is scheduled for completion September 2014. The Corps will perform a levee system evaluation to ensure it meets flood-risk requirements and will provide FEMA with an evaluation report to include the ability of NPS to properly install the 17th Street closure segment and operate and maintain the levees. If there is a positive rating, FEMA will “accredit” the levee system and eventually issue a new FIRM, following relevant stakeholder meetings.

 

BUDGET ($):

 

 Construction

Total Estimated Cost

 

Federal Cost Estimate

 $ 10,450,0001

 

 

Federal Funds Data

 

Allocations thru FY 20122

 9,431,700

Allocation for FY 2013

 0

President Budget FY 20143  0
Allocation for FY 2014  0

Balance to Complete

769,100

Notes:

1 This total cost estimate is constrained to the currently authorized project cost limit.

2 Of these total allocations, $3,121,835 were Investigations PED funds and $5,296,009 were Construction funds were provided under the 2009 American Recovery and Reinvestment Act (ARRA).

3 The President typically sends the budget to Congress in February each year. Upon release, budget amounts for the USACE Civil Works programs and specified projects are posted online at the HQUSACE website in a program budget press book at: http://www.usace.army.mil/Missions/CivilWorks/Budget.aspx.

SCHEDULE:

FY 2013 Completed Work:  Prepared a draft Limited Reevaluation Report (LRR), and completed 90 percent of the construction on the 17th Street closure structure.

FY 2014 Scheduled Work:  Previous year carry in funds in the amount of $145,768 used to complete the construction of the 17th Street closure and complete a levee certification evaluation report.

COMPLETION:  The remaining levee modification design and construction work could be completed within 24 months, pending Congressional modification of the authorized project cost and available funding.

For more information regarding the Washington, DC & Vicinity Local Flood Protection Project, contact Rolando A. Sanidad, PMP, CENAB-PP-C, 410-962-2668, e-mail Rolando.Sanidad@usace.army.mil.

17th Street Levee FEMA flood National Park Service Washington D.C. Corps of Engineers