Estimate: $5 - $11 million Big Sandy Creek Watershed, Floodwater Retarding Structure, Site No. 44 Upgrade, Wise County, Texas State funding has been authorized by Title 7, Chapter 201, Agriculture Code of Texas, and Title 31, Part 17, Chapter 529, Texas Administrative Code for this project. Site No. 44 is a single purpose flood retarding structure that was designed and constructed as a low hazard dam in 1981 on Blue Creek. The site is approx. 0.5 miles north of Aurora, Texas and is situated about 1.2 miles west of U.S. Hwy. 287. Upgrades to the existing structure include maintaining the existing principal spillway crest and normal pool elevation; adding additional rock riprap on the upstream slope; raising the embankment by 6 feet with compacted fill to an elevation of 789.0 feet, flattening the downstream slope to 3H 1V; extending the embankment through the existing earthen auxiliary spillway; constructing a roller compacted concrete auxiliary spillway over the embankment along the existing principal spillway alignment with a stilling basin on the downstream end; grouting portions of the existing principal spillway conduit in-place and removing the existing riser; and installing a new principal spillway consisting of a 48-inch diameter conduit installed using microtunneling methods and covered baffle inlet riser offset to the right of the existing alignment.
Questions concerning this bid opportunity should be made in writing to Mrs. Janet Holmes, Contracting Specialist, email jholmes@mande-pe.com or by phone at 501-425-4872. Performance time for completion of this contract is 475 calendar days, excluding federal holidays and weather days. The estimated project value has been revised to $8-$11 million *The value for this project is based on a financial range. The value is listed as the highest possible cost from the range provided by a stakeholder or official project document. QA Expiration Date has changed from 5/20/2022 4:00:00 PM CDT to 5/24/2022 4:00:00 PM CDT
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