CS-29 Black Bayou Culverts Structure Repair

Client Department of Agriculture-NRCS

Contract Amount $6,900,963.61

Completion Date 07/18/2016

Tarpan Construction was the Prime Contractor on this project.  The final contract amount was $6,900,963.61. An excellent team of sub-contractors was assembled to tackle the varying scopes of work on this project. Tarpan handled the management of the project. Additionally, Tarpan’s crew self-performed tasks such as earthen coffer dams, dewatering, cleaning the culvert structures, placing rip rap, trucking, executing the traffic control, and pollution control plan.  Overall, Tarpan self-performed 43% of the work. 

The project was located in Southern Calcasieu Parish adjacent to the Gulf Intracoastal Waterway (GIWW).  In recent years, the structure had been significantly undermined, resulting in a loss of structural support from the soil. This project consisted of installing two steel sheet pile walls in the immediate vicinity of the existing concrete culvert structure in an effort to prevent saline water intrusion.  Additionally, the project included foundation strengthening, or underpinning, in an effort to increase the foundation support capacity. This construction effort required the project site to be dewatered for an extended duration to allow for the underpinning and maintenance activities to be completed.  USDA-NRCS was the client.  The project was 100% complete as of July 7, 2016.  Zero lost-time accidents during the project.  Completed CCASS Evaluation available upon request—received EXCEPTIONAL RATING!!