Project

Lady Bird Johnson (LBJ) Park is a popular City of San Antonio park that offers many amenities in the Salado Creek watershed. A tributary that flows through LBJ Park is experiencing severe erosion and incision due to upstream development and corresponding increased and concentrated flows. Additionally, the current maintenance practices within the park have impacted the riparian buffer and vegetation within the overbank area.

EPR is working with the Client to evaluate stream conditions at LBJ Park and develop plans for stabilization. Work to date has included detailed site evaluations of geomorphologic, hydrologic, and hydraulic conditions. As the park is located within a FEMA-mapped floodplain, EPR prepared 1D HEC-RAS and HEC-HMS models to determine hydraulics and flow paths on the site, water rise determinations, and on-site drainage patterns. Outputs from the modeling efforts informed the design criteria and will provide data to support a Letter Of Map Revision (LOMR) for submission to the local floodplain administrator and Federal Emergency Management Agency (FEMA). The work is expected to move to formal design in 2021.