Stormwater Engineering Projects

Sunset Upper Debris Basin Dam


The Mitigated Negative Declaration (MND) and Mitigation Monitoring and Reporting Program (MMRP) for the Sunset Upper Debris Dam Modification Project was adopted by the Board of Supervisors on June 17, 2014. A Notice of Determination was filed with the Office of Planning and Research on June 19, 2014. You may view the final MND, MMRP, Response to Comments and Errata by clicking the links in the Resources section below.


The Sunset Upper dam and debris basin (Project site) are located on County-owned property within the City of Burbank and in the Verdugo Mountains and north of the terminus of Country Club Drive. The proposed Project involves increasing the height of the existing Sunset Upper concrete arch dam by a maximum of 5 feet, which, in turn, would increase the debris storage capacity of the Sunset Upper Debris Basin, located behind the Sunset Upper Dam, by 8,000 cubic yards to provide enhanced flood and debris protection to downstream land uses. The existing protective fences would be removed during construction and reinstalled, and the trash rack cage behind the spillway would be extended by 5 feet. The existing access road crossing the southern end of the dam would be raised to match the increased dam elevation. Also, with proposed Project implementation, the 100% and 25% contact lines, defined by the LACFCD to describe the basin limits and interior work areas/capacity, would increase along the edges of the existing contact lines and these areas would be subject to potential inundation. The existing permits with resource agencies related to long-term debris basin maintenance activities would require amendments subsequent to proposed Project implementation to reflect the expanded 25% and 100% contact lines. The project site is not identified on any hazardous materials list compiled pursuant to Section 65962.5 of the Government Code. Implementation of the proposed Project would result in potentially significant impacts but implementation of regulatory requirements and mitigation measures would reduce all of the potentially significant impacts to a less than significant level.



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Updated on: 08/14/2014