DLZ worked with the Village of Roseville to provide engineering services as part of the Federal Emergency Management Agency (FEMA) levee accreditation process. The process was for the Village’s flood protection system along Moxahala Creek. Levee accreditation, performed per 44 CFR 65.10, was a technical study. It demonstrated reasonable certainty that the levee system protecting an area would contain the base flood (1%/year chance exceedance flood).
DLZ was responsible for determining whether the individual hydrology, hydraulics, structural, geotechnical, mechanical, and electrical components would adequately meet their respective accreditation requirements.
The U.S. Army Corps of Engineers initially constructed the flood protection system between August 1959 and October 1960. The project was located along Moxahala Creek in the Village of Roseville and provided flood protection to approximately 65 acres. The levee system included about 5,500 feet of the levee, five closures (one roadway stop log and four sluice gates), and one pump station. The Village owned and operated the system, although the Corps performed an annual inspection of the project.
DLZ submitted a draft levee accreditation report to the Village for its review in November 2012. This draft report included a listing of items that needed remediation in order to receive accredition for the levee system. The Village had addressed all system deficiencies and submitted a final levee accreditation report to FEMA in late 2013.