This project provides for the rehabilitation of the existing Brighton Dam Road Bridge No. M-0229 over Brighton Dam of Triadelphia Reservoir. This 602-foot long 15-span bridge, which is supported by Brighton Dam, is in need of repairs to the parapets, bridge deck joints, prestressed concrete beams, abutment backwalls, streetlights, and approach roadways and sidewalks to enhance the safety of the public and the integrity of the dam. The existing storm inlets on the approach roadways at both ends of the bridge will be improved as needed. The existing diagonal crosswalk at the entrance of the Brighton Dam Azalea Garden on the Montgomery County side, approximately 320 feet west of the bridge, will be relocated to be perpendicular to Brighton Dam Road. An additional streetlight will be installed at each end of the relocated crosswalk.

Upon completion, the Average Daily Traffic (ADT) on the Brighton Dam Road Bridge will remain approximately 6,000 vehicles per day.

Design and construction delay due to scope changes for additional tasks. The design was completed fourth quarter of FY25. Construction is scheduled to start in the spring 2026, and be completed in fall 2026.

This bridge, reconstructed in 1999, requires repairs to the 1,002' long west parapets, 642' long east parapets, 16 bridge deck joints, prestressed concrete beams, abutment backwalls, street lights, and approach roadways and sidewalks. The parapets have severe concrete spalling at many parapet joints. Prestressed concrete beams and abutment backwalls have spalling and cracking. The approach roadways and sidewalks have settlement at both ends of the bridge. The bridge deck joints have failed, allowing water and deicing chemicals to flow through the bridge deck which resulted in corrosion and deterioration to the mechanized equipment for the dam operations. Some streetlights and pole supports are damaged. The bridge rehabilitation was requested by WSSC Water to protect the newly reconstructed dam operating equipment. The improvement of storm inlets was requested by WSSC Water to minimize storm runoff entering into the bridge deck surface from the approach roadways.

The 2005 Olney Master Plan designates Brighton Dam Road as Arterial Road (A-15) with a minimum right-of-way of 80'. The December 2018 Montgomery County Bicycle Master Plan recommends bikeable shoulders. The deterioration of the bridge was identified through the County's 2021 Biennial Inspection Program. The construction management and construction costs for the new fire truck turnaround site will be shared equally by Montgomery County and Howard County, and the remainder of the project costs will be shared equally by Montgomery County, Howard County and WSSC Water. WSSC Water will grant Howard County a perpetual maintenance easement for the new turnaround site at no cost. Streetlights, crosswalks, sidewalk ramps, bikeways, and other pertinent issues are included in the design of the project to ensure pedestrian safety.

A pedestrian impact analysis has been completed for this project.

WSSC Water, Howard County, Maryland Department of the Environment, Maryland Department of Natural Resources, Maryland-National Capital Park and Planning Commission, Montgomery County Department of Permitting Service, Montgomery County Fire and Rescue Service, Montgomery County Police Department, Montgomery County Public Schools, Montgomery County Ride On, Howard County Fire and Rescue Services, Howard County Police Department, Howard County Public Schools, Baltimore Gas and Electric Company, and U.S. Army Corps of Engineers