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.

The Arroyo De Laguna at Verona Bridge and Arroyo Willow Riparian Habitat projects were executed concurrently by FMC from August 2011 thru October 2011. FMC designed and constructed a bench on both sides of the creek by excavating a flood channel down the middle of the creek. Diversions were set up at both sites. At the Arroyo site four 24 inch welded pipe was used with aqua dams to hold back the water and use as a dam. 18-30 CFS of water now flows through the site weekly. At the Verona site a diversion channel was created and 300 feet of 48-inch diameter pipe was laid and backfilled. FMC crews lined the channel with welded plastic to prevent erosion. A diversion was established to direct water through the new channel FMC established, resulting with 18-30 CFS continuous flow of water each day. FMC established a pool at the site, and the Alameda County Resource Conservation District approved this pool for specific fish species. Channels were dug and the excavated material was used to form benches for the floodplain. Weirs at both sites were built for water flow to be concentrated toward the center of the creek, so that erosion would cease at the banks. The Verona site had an enormous amount of Cottonwood and Willow tree transplants. FMC used a 320 excavator to transplant 50 large Cottonwood trees. Additional large trees were planted immediately along the water’s edge; trios of support poles were secured to the base of each tree to ensure deep root growth. Using 18-inch diameter, fresh cut Douglass Fir timber, FMC built a log crib wall. Rock slopes were also designed and implemented using rip rap. FMC used over 3000 tons of rip rap for the scope of these two projects for weirs and slope protection. The firms Confluence Landscape and KCI Environmental were the two companies that handled all the new plantings and irrigation for the project. The Arroyo site had two 2500-gallon tanks installed for irrigation and 2600 linear feet of fencing was installed. The fencing material included electric wire and breakaways were established along the creek (to prevent deer and cattle from entering the site and eating the newly planted native species). This project has a three-year maintenance agreement; FMC’s subcontractors are responsible for managing that work.
The scope of this project was a prevailing wage project and office staff provided certified payroll throughout the timeline. FMC works under USACE permits, 404 water quality permits, county permits, and 1601 Fish and Game permits. The two projects totaled $1.2 million and both were completed on time as per the contract (within two months) and without any incidents or safety violations.