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Budget Year / Version:  
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Description

This project provides for the replacement of the existing Elmhirst Parkway Bridge over Tributary to Rock Creek. The existing bridge, built in 1940, is a single span structural plate arch under fill carrying a 19'-0" roadway and 10'-0" grass shoulders on each side. The proposed replacement bridge includes a single span precast concrete arch structure under fill with a 22'-0" roadway and 8'-6" grass shoulders on each side. The project includes approach roadway work at each end of the bridge as necessary to tie-in to the existing roadway. The bridge and road will be closed to vehicular and pedestrian traffic during construction. The existing Elmhirst Bike path will remain open during the construction.
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Phase

Preliminary Design Stage

Status

Pending Closeout
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Budget Snapshot
$2.25M Total
Expenditures/Funding
$0M 6 Year Total
Expenditures/Funding
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Location

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Capacity

The roadway Average Daily Traffic (ADT) is 600 and the roadway capacity will not change as a result of this project.
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Estimated Schedule

The design of the project is expected to finish in Summer 2014. The construction is scheduled to start in Spring 2016 and be completed in Winter 2017.
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Justification

The proposed replacement work is necessary to provide a safe roadway condition for the traveling public. The 2011 bridge inspection revealed that there is severe steel corrosion with areas of 100 percent section loss along the arch springlines. The steel structural plate arch is rated in poor condition and the bridge is considered structurally deficient. The bridge is weight restricted and school buses are denied a waiver to cross the bridge due to safety concerns. Based on experiences with similar type structures in this condition the structure needs to be replaced as soon as possible or the roadway may be closed. Elmhirst Parkway is located in the Bethesda-Chevy Chase Master Plan area. Elmhirst Parkway is the main entrance that extends north from Cedar Lane at the Locust Hill Estates neighborhood. Elmhirst Parkway Bridge is not considered historic but is located on the boundary of Maryland Inventory of Historic Properties Survey No. M:35-120. A review of impacts to pedestrians, bicyclists and the requirements of the ADA (American with Disabilities Act of 1991) has been performed and addressed by this project. Streetlights, crosswalks, sidewalk ramps, bikeways and other pertinent issues are being considered in the design of the project to ensure pedestrian safety.
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Other

The design costs for this project are covered in the Bridge Design project (No. 509132).
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Fiscal Note

The costs of bridge construction and construction management for this project are eligible for up to 80 percent Federal Aid. $57,000 transfer in FY16 from Father Hurley Boulevard project (No. 500516).
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Disclosures

A pedestrian impact analysis has been completed for this project.
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Coordination

Federal Highway Administration - Federal Aid Bridge Replacement/Rehabilitation Program Maryland State Highway Administration Maryland Department of Environment Maryland Historical Trust Maryland National Capital Park and Planning Commission Montgomery County Department of Permitting Services, Utilities, and Bridge Design PDF (No. 509132).
Budget Snapshot
$2.25M Total
Expenditures/Funding
$0M 6 Year Total
Expenditures/Funding
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Project Details
Project NumberP501420
Date Last Modified01/04/20
Administering AgencyTransportation
CategoryTransportation
SubCategoryBridges
Planning AreaBethesda-Chevy Chase and Vicinity
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Total Expenditures by Cost Element (000s)
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Total Funding by Source (000s)
EXPENDITURES (000s)
Cost ElementsTotalThru FY19Est FY20Total 6 YearsFY 21FY 22FY 23FY 24FY 25FY 26Beyond 6 Years
Planning, Design and Supervision1911108100000000
Land1301300000000
Site Improvements and Utilities44000000000
Construction204320271600000000
Other00000000000
Total Expenditures2251214111000000000
FUNDING (000s)
Funding SourceTotalThru FY19Est FY20Total 6 YearsFY 21FY 22FY 23FY 24FY 25FY 26Beyond 6 Years
Federal Aid14611461000000000
G.O. Bonds79068011000000000
Total Funding Sources2251214111000000000
APPROPRIATION AND EXPENDITURE DATA ($000s)
Appropriation FY 21 Request0
Year First AppropriationFY15
Appropriation FY 22 Request0
Last FY's Cost Estimate2251
Cumulative Appropriation2251
Expenditure / Encumbrances2141
Unencumbered Balance110