Hibernia Dam Rehabilitation Project

Hibernia Dam Regional Flood Control Facility and Chambers Lake Reservoir are located at Hibernia County Park in West Caln Township, Chester County. The dam was built in 1994 by the Chester County Water Resources Authority and USDA Soil Conservation Service, now the Natural Resources Conservation Service (NRCS). Hibernia Dam is owned and operated by the Authority and provides recreation, water supply, and flood protection for residents in Chester County.

With technical support and funding from NRCS, CCWRA completed a rehabilitation project on Hibernia Dam in the summer of 2020 in order to meet modern dam safety standards and to extend the lifespan for another 50 years. Funding for the project was provided by the County of Chester, the USDA Natural Resources Conservation Service, and Pennsylvania American Water Co. The lead construction contractor for the project was KC Construction of Ivyland, PA, and the engineering design firm was Gannett Fleming, Camp Hill, PA.

Project Components

  • Constructing a concrete wall below the grass in the auxiliary spillway,
  • Installing a sand and stone filter at the toe of the dam,
  • Grading the mid-slope bench to improve drainage, and 
  • Extending of the existing maintenance access road to the outlet.

Photos: Installation of concrete cutoff wall

Concrete footer being poured for cutoff wall,
August 20, 2020

Forms being removed from cutoff wall,
September 3, 2020

Cutoff wall complete and slope graded and vegetated,
November 13, 2020

Photos: Rock filtered toe

HiberniaDam_Rock Filtered Toe
Fine drainage aggregate being placed on embankment, July 22, 2020

HiberniaDam_Rock Filtered Toe
Fine drainage material (lower band), coarse draiange material (middle band) and rock riprap (upper band) comprise the rock filtered toe,
August 20, 2020

HiberniaDam_Rock Filtered Toe Complete
Rock filtered toe complete, November 13, 2020

Hibernia Dam and Chambers Lake, Hibernia County Park.

Hibernia Dam: Auxiliary spillway (foreground) and embankment.

Hibernia Dam: Downstream face of dam (Rock filter, grading of bench, and maintenance access drive completed).

Contact Information

For additional information regarding the Rehabilitation Project, please contact: 
Craig Thomas
Chester County Water Resources Authority
ph: 610-344-5400
email: [email protected]