Skip Navigation


The Ohio NRCS Engineering staff is comprised of agricultural and civil engineers, engineering technicians, and a geologist.  The staff provides innovative, economical, and timely services to NRCS staff, conservation partners, and private landowners.  The Ohio NRCS engineering staff applies sound engineering tools and principles through delegated approval authority to plan, design, and implement conservation practices to solve problems related to soil erosion, water quality, agricultural waste management, and wetland restoration.
Technical Contact for Ohio:
Bruce Atherton, P.E.
State Conservation Engineer
200 N. High Street, Room 522, Columbus, OH 43215
Telephone: (614) 255-2488
Cell:  (614) 917-3176


West Fork Duck Creek Watershed-  Noble County, Ohio

Caldwell Lake Dam Rehabilitation (2009)

Pool and Auxiliary Spillway Front slope of dam


View of Auxiliary Spillway, Dam, and Pool Area
View Along the Top of Dam
Showing the Upstream Slope and PS Structure

Caldwell Lake dam was originally constructed in 1964 under the authority of Public Law 83-566, the Watershed Protection and Flood Prevention Act of 1954.  The dam was rehabilitated in 2009 under the NRCS Dam Rehabilitation Program.  Two existing low stage ports were plugged and two new ports (at higher elevations) and gate were added to the Principal Spillway tower.  The top of the dam was raised 6.5 feet.  The Auxiliary Spillway (AS) was widened from 40 feet to 150 feet and the crest was raised 2.3 feet.  Rock that was excavated from the AS was used on the back face of the dam to widen the base of the dam.  Once the rock fill reached the top of the existing dam, earthfill was used to construct the remaining 6.5 feet, creating a new maximum height of dam of 66.5 feet.