Four M Contracting, Inc.

We endeavor to provide superior, high quality service deploying the highest quality construction while maintaining safety, staying within budget, and remaining sensitive to your environment.

Cosumnes Mitigation Flood Bank – Phase 1 & 2


FMC breached the consumnes river on August 20 2011 as part of the second phase of this project. Monte Molina was running the excavator, and FMC used a silt curtain up stream of the breach to minimize trubity, while accomplishing final grade.

Westervelt Ecological Services hired Four M Contracting, Inc. to compete both phase of this project that was located near Thornton, California. Habitat was created for Floodplain Mosaic Wetlands, Floodplain Riparian Habitat and Shaded Aquatic Habitat (SRA). Phase 1 was started in June 2010 and the second phase was completed August 2011. Both phases were completed to the satisfaction of the client.

A specific construction entrance was built prior to starting the project, as well as a silt fence around all out-going water sources. Over 240,000 cubic yards of material were hauled and placed with GPS- guided pull scrapers. A model from which was built from CAD drawings was used as a guide to ensure accuracy and precise line control. Open water channels and over 350 depressions were created so that Westervelt Ecological Services as the Cosumnes Floodplain management company could flood the channels and direct water as needed over the 472-acre site. Additionally, 3 water control structures were installed onsite for water management. Each control structure was a precast 4x6 with pipe sizes 36 inches; pipe lengths 60 feet. In August of 2011 the Cosumnes levee was breeched by FMC. Excavated channels built in 2010 were allowed to handle high and low tides. Water from the Cosumnes River flows to the site during high tide and low tides. Water from the tides irrigates native plants and trees that were planted onsite. 

SWEPP permits, Army Corps of Engineers, Fish and Game permits, U.S. Environmental Protection Agency, Cal Department of Fish and Game, and NOAA Fisheries permits were all obtained by Westervelt Ecological Services. Throughout construction Four M Contracting, Inc. had to adhere and implement best management practices, follow strict permit guidelines and safety standards for this project, as they do for all their work.

All employees from Four M Contracting, Inc. have had environmental awareness training specific to the site. Employees of Four M Contracting, Inc. attends annual training seminars focused on current information regarding environmental habitats and sensitive species related to site-specific projects.

This project for Westervelt Ecological Services experienced no incidents. The goals of this project were achieved on time and on budget.