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This project was designed for the Montana Department of Transportation in collaboration with Butte-Silver Bow County. The project was funded by federal, state, and Butte-Silver Bow County contributions, largely from the Surface Transportation Urban program. The purpose and need for the project was to maintain the integrity of the roadway surfacing, restore and improve existing sidewalks, and update sidewalk corners to current Americans with Disabilities Act (ADA) design standards. Design for the project was constrained by budget and schedule. Enhancing the project corridors, along with completing the project without utilizing borrowed funds fro9m the Butte-Silver Bow County Urban Fund were key objectives for the project, including completing construction in the 2019 season with no exception for missing the target date.
The West Park Street and Excelsior Avenue corridors are designated on the National Register of Historic Properties within the Butte-Anaconda National Landmark District. Stahly Engineering was challenged with crafting enhancements to complement the unique character of the corridor neighborhoods, while avoiding detrimental impacts to historic properties. The Stahly Engineering design team integrated 119 ADA curb ramps, numerous mid-block sidewalk replacements, and the removal and updating of all overhead lighting along West Park Street including reconfiguration of the roadway for a center two-way-left turn lane with bike lanes on West Park Street.
To optimize enhancements with available budget, the Stahly Design Team crafted an inventory mechanism that included all project stakeholders for overall consensus on improvement locations. Improvements for pedestrian connectivity required replacing missing and severely failed sidewalks to safely route pedestrians. Rapid rectangular flashing beacons replaced obsolete traffic signals at Idaho Street and Washington Street to improve traffic flow along West Park Street and enhance pedestrian safety and convenience when needed for accessing events at the Butte Central Highschool and Mother Lode Theatre.
Designing and constructing new ADA compliant sidewalks and curb ramps along the steep terrain and historic setting of uptown Butte was no easy task. Most improvements designed and constructed tired into adjacent historic and sensitive features, requiring work to be completed in a restricted footprint. A unique and site-specific design was prepared for each curb ramp on the project. Stahly Engineering innovated the normal design process with 3D applications to efficiently find solutions to match into existing features and adjacent site constraints.