News - Letter of Map Revision – Town of Siler City – Charles L. Turner Reservoir Expansion

Charles L. Turner Reservoir
Aerial Photograph of New Dam on
Charles L. Turner Reservoir

July 26, 2011 – FEMA approved the Letter of Map Revision (LOMR) prepared by JEWELL Engineering Consultants and Grimes Engineering for the Town of Siler City for a newly constructed dam and reservoir expansion on Rocky River located in northwestern Chatham County.

In order to increase its available water supply to meet existing and long-term projected needs, the Town of Siler City recently expanded the capacity of the Lower Rocky River Reservoir by constructing a larger and higher dam downstream of the original dam. JEWELL Engineering has been involved with this project since very early in the design phase in 2000. Our work has included watershed analysis, hydrologic and hydraulic analyses, roller-compacted concrete dam design, dam construction plans and specifications preparation, and permitting (ACOE, FEMA, and NC Dam Safety). The reservoir expansion was permitted under a Conditional Letter of Map Revision (CLOMR) issued in 2009 which was also prepared by JEWELL Engineering and Grimes Engineering. Following construction of the dam, the Town of Siler City officially named the reservoir Charles L. Turner Reservoir.

Charles L. Turner Reservoir
Aerial Photograph of North Wetland at
Charles L. Turner Reservoir

This LOMR project entailed remapping over 3 miles of floodplain on the Rocky River as well as sections of Lacy Creek and Mud Lick Creek at their confluence with Rocky River. Two wetland mitigation areas located on the east side of Rocky River were required by North Carolina Division of Water Quality as part of this reservoir expansion project. It should be noted that the Town of Siler City owns 97% of the property impacted by the additional flooding that resulted from the construction of the new dam. Other additional impacts were limited to less than 1.6 acres in total distributed over 12 properties.

Completion of this reservoir expansion project is a powerful testimony to the Town’s capable and tenacious leadership. JEWELL Engineering is grateful for having had the opportunity to serve as a consultant to the Town over the past 11 years to assist in bringing this project to a successful conclusion.