Drainage and Hydraulic Design for Reliable Transportation Infrastructure

Effective roadway performance depends on resilient drainage systems and accurate hydraulic modeling. RPA provides hydraulic engineering services and hydrologic analysis that support roadway design, stormwater management, culvert and bridge sizing, floodplain assessment, and erosion mitigation.

Using site-specific analysis, modeling tools such as HEC-RAS and HEC-HMS, and a clear understanding of state and federal requirements, our engineers design systems that protect infrastructure, improve safety, and reduce long-term maintenance needs. Projects often include stormwater conveyance, flow control, channel stabilization, irrigation coordination, and integration of drainage solutions into roadway design. The result is infrastructure that performs reliably under both routine and extreme conditions.