Williamson Creek - Tributary 4 Channel Stabilization

The City of Austin is soliciting bids for the Williamson Creek Tributary 4 Channel Stabilization project, identified as IFB 6100 CLMC1176. The project aims to address severe erosion affecting commercial and residential properties by armoring stream banks, restoring stable channel geometry, and rehabilitating the riparian ecosystem. The scope of work focuses on two specific locations: approximately 950 linear feet between Eberhart Lane and Turtle Creek Boulevard, and approximately 400 linear feet downstream of W Stassney Lane. Key deliverables include the construction of dry stacked limestone block walls, installation of vegetated and dry rock riprap, slope reconstruction, and the replacement, relocation, or abandonment of wastewater mains using 8-inch and 12-inch PVC pipes. The contract will be awarded to the lowest responsible bidder who meets all technical and safety requirements. Bidders must submit their proposals electronically via Austin Finance Online eResponse by October 29, 2026, at 2:00 PM. A critical component of the submission is the MBE/WBE/DBE Compliance Plan; failure to provide this documentation will render a bid non-responsive. The project requires a substantial completion period of 182 calendar days from the Notice to Proceed, with final completion due within 90 days thereafter. Performance and payment bonds must cover 100 percent of the contract amount, and contractors must adhere to strict labor standards, including OSHA training certifications for workers and safety representatives.