In the Spring of 2018, several major flooding events damaged roadways and bridges throughout Washington County, MD. Back Road was washed away and suffered significant damage. The County contracted for the repair of the damaged roadway using the design-build methodology.
The project scope included design and construction of a concrete roadway, ~525 linear feet to act as a low water crossing to accommodate the flow of water overtopping the roadway. The scope of work also included channel repair and stabilization measures of a natural stream. Additionally, there was a need for roadway shoulder repairs for ~725 liner feet of roadway and fill placement to repair erosion around an existing structure. Due to funding resources, an add alternate for the project included removing and replacing an existing culvert structure.
Triad provided Environmental Consulting Services including a Wetland/Waterway Delineation Study and field staking of wetland areas. Triad’s survey team provided support surveying and marking the boundaries and creating a base map.
In addition, Triad performed topographic survey 800’ to the North and 500’ to the South along the road at a width of ~50-70’. The survey was expanded to include adjacent areas, a tree survey, the existing concrete culvert structure, and 12 cross sections along the stream. During construction, Triad provided construction stakeout for the newly designed improvements and as-built survey of the completed structure and culverts.
Geotechnical exploration services included test pits and soil borings to evaluate subsurface conditions, check for groundwater and/or rock. Our findings, laboratory testing results and recommendations were all included in a detailed geotechnical report prepared for the client.
During construction, Triad also provided construction monitoring, materials testing and inspections services.