TxDOT On/Off System Bridge Replacements, Lufkin, TX
Water Resources | Drainage
Role: Subconsultant
AZ&B provided H&H modeling services for four bridge replacement projects in Lufkin District. One bridge was on-system, the other three were off-system county roads, and ll four crossings were in FEMA Zone ‘A’ floodplains. AZ&B used NRCS TR-20 methodology for peak flow rates. We created existing condition HEC-RAS models as baseline comparisons. Each new bridge was designed using HEC-RAS to ensure no rise in 100-year WSEL outside of the ROW. AZ&B analyzed potential bridge scour at each crossing with HEC-18 methods. For each bridge, we prepared a hydraulic report and hydraulic data PS&E sheets.
Construction Estimate
$2 million
Services
- H&H Modeling
- TR-20 (NRCS) Modeling
- HEC-RAS Modeling
- FEMA Zone ‘A’ Crossings
- Local Floodplain
- Administrator Coordination
- Bridge Scour Analysis
- PS&E Preparation
- Ditch Design
- Culvert Design
