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Budget Year / Version:  
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Description

This project provides for the replacement of the existing Beach Drive Bridge over Silver Creek. The existing bridge, built in 1964, consists of three steel plate arches. The bridge provides a 24'-0" wide clear roadway with a 7'-0" Rock Creek Trail on the north side and has two 1'-9" parapets. The proposed replacement bridge includes a single span prestressed concrete slab beam structure carrying a 22'-0" roadway and a 5'-4" shoulder on each side. This width will allow for the implementation of safe on-road bicycling in accordance with the Master Plan. The Rock Creek Trail will be relocated to cross Silver Creek approximately 90 feet north of the proposed Beach Drive Bridge. This will improve safety by separating the pedestrian and light-use bicycle traffic from the vehicular traffic. 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 traffic during construction. In order to maintain pedestrian traffic on Rock Creek Trail during construction, the pedestrian bridge, and its approaches will be constructed prior to the removal of the existing Beach Drive Bridge. Accelerated bridge construction techniques will be utilized to minimize the disruption to the traveling public and local community.
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Phase

Final Design Stage

Status

Active
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Budget Snapshot
$4.2M Total
Expenditures/Funding
$4.2M 6 Year Total
Expenditures/Funding
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Location

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Capacity

The roadway Average Daily Traffic (ADT) is approximately 5,500 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 the spring of 2020. Construction is scheduled to start in the fall of 2020 and be completed in summer of 2021. The bridge will be closed to traffic from November 2020 to April 2021.
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Justification

The proposed replacement work is necessary to provide a safe roadway condition for the traveling public. The 2015 bridge inspection revealed that the steel arches are in poor condition. There is laminar corrosion on the arches above and below the waterline up to 3'-0" high above the footing. Arch 1 and Arch 3 have holes in the steel along the west side. Arch 2 has heavy corrosion with moderate to severe section loss at the waterline and at isolated locations on the arch walls. The holes in the arches can be probed up to 6" deep. The south parapet has been removed above Arches 2 and 3, as well as along the Southeast Wingwall. Temporary concrete traffic barrier sections have been placed along the south side of the bridge. The north spandrel wall has isolated areas of minor deterioration of the mortar joints. There is moderate efflorescence and corrosion staining between the north spandrel wall and the arches. The south spandrel wall is separated up to 3 inches from the edge of Arch 1. There is a concrete fascia repair from Arch 2 to the east side of Arch 3. Implementation of this project would allow the bridge to be restored to full capacity. The 1989 Kensington-Wheaton Master Plan designates Beach Drive as Park Road. Rock Creek Trail is classified as Stream Valley Park Trail in the 2018 approved Bicycle Master Plan.
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Other

Project design costs 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.
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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 the Environment, Maryland National Capital Park and Planning Commission, Montgomery County Department of Permitting Services, Utilities, and Bridge Design Project CIP (No. 509132).
Budget Snapshot
$4.2M Total
Expenditures/Funding
$4.2M 6 Year Total
Expenditures/Funding
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Project Details
Project NumberP501903
Date Last Modified05/17/20
Administering AgencyTransportation
CategoryTransportation
SubCategoryBridges
Planning AreaKensington-Wheaton
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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 Supervision3150031521510000000
Land50055000000
Site Improvements and Utilities00000000000
Construction38820038822882100000000
Other00000000000
Total Expenditures42020042023102110000000
FUNDING (000s)
Funding SourceTotalThru FY19Est FY20Total 6 YearsFY 21FY 22FY 23FY 24FY 25FY 26Beyond 6 Years
Federal Aid2790002790206073000000
G.O. Bonds1412001412104237000000
Total Funding Sources42020042023102110000000
APPROPRIATION AND EXPENDITURE DATA ($000s)
Appropriation FY 21 Request0
Year First AppropriationFY20
Appropriation FY 22 Request0
Last FY's Cost Estimate4202
Cumulative Appropriation4202
Expenditure / Encumbrances0
Unencumbered Balance4202