Cox Creek Dredge Material Containment Facility (DMCF) Spillway Repair
Anne Arundel County, MD
RK&K geotechnical engineers reviewed construction plans and engineering reports to evaluate the cause of the excessive settlement and failure of the two spillway structures at the Cox Creek Dredge Material Containment Facility (DMCF), and provided recommendations to repair the facility. Repair measures were required as MES is reactivating the existing 133 acre Cox Creek DMCF to accommodate an additional 6 million cubic yards of dredged material from the Port of Baltimore channels over a twelve year period from 2010 to 2022. The two spillway structures were pile supported towers consisting of two 36 inch diameter corrugated metal pipe outfalls. The dike crest was raised to EL 36; however, the spillway outfalls settled about a foot causing the pipes to separate. RK&K provided geotechnical and environmental recommendations, reviewed final repair plans, and monitored the construction progress. Repairs were completed in time to allow for the on time opening of the facility in April 2010.