Dry Creek Levee Relocation
City of Roseville, California
West Yost provided planning, analysis, environmental review, permitting, design, and construction management services for the Dry Creek Wastewater Treatment Plant Pond Levee Relocation. This project included the hydrologic and hydraulic evaluations of setting the pond levees 100 feet back from the Dry Creek bank in order to provide 100-year protection of the wastewater storage ponds while enhancing the flow-carrying capacity of Dry Creek in an environmentally sensitive manner. Setting back the levees re-created a floodplain reach approximately 2,200 feet long and included re-creation of approximately 5 acres of riparian habitat in the restored floodplain. During the geotechnical investigations of the proposed levee alignment, it was discovered that the area includes numerous sand layers that could lead to levee failure. Consequently, a 60 feet deep slurry cutoff wall was designed and constructed to eliminate this risk of levee failure.
- California Water Environment Association, Sacramento Area Section, 2011 Engineering Achievement Award
- American Society of Civil Engineers, Sacramento Section, 2011 Small Flood Control Project of the Year