• Buda Master Drainage Plan
• Onion Creek Flood Study
• San Marcos River Floodplain Revision
• Urban Watersheds Flood Needs Assessment

Water Quality Systems Design

Watershed Water Quality Studies

Loomis Partners served as sole contractor for the translation of existing hydrologic and hydraulic models to HEC-1 and HEC-RAS format for 17 urban watersheds in and around Austin, Texas. In evaluating its collection of existing hydrologic and hydraulic models for the downtown and surrounding urbanized areas, the City of Austin's Stormwater Management Division discovered that its models database included a variety of modeling platforms (e.g. TR-20, HEC-1, Austin Standard Method, WSP2, HEC-2).

Loomis Partners was contracted to translate all existing hydrologic models to HEC-1 and all existing hydraulic models to HEC-RAS. Work included: (1) identification and compilation of all existing models; (2) where possible, implementation of existing models using the existing platform; (3) field measurement of more than 400 bridges for coding into HEC-RAS; (4) translation of existing models to HEC-1 and HEC-RAS; (5) trouble-shooting of problematic results including field assessment of problem areas; and (6) systematic documentation and comparison of results between previous and updated modeling platforms.

Services Provided:

• Drainage Study
• Field Reconnaissance
• Floodplain Hydrology/Hydraulics
• Floodplain Mapping
• Project Management
• Preliminary Drainage Design