Upgrading a high-hazard dam for long-term safety
- Client:Pennsylvania Department of Conservation and Natural Resources
- Location: Lebanon County, PA
About this Project
This project aimed to bring Memorial Lake State Park Dam, built in 1946 and classified as “High Hazard,” up to current PA DEP Dam Safety standards while improving its long-term operation and maintenance. The dam’s classification reflects its potential to cause significant damage and loss of life in the event of failure.
AEG performed subsurface exploration in accordance with DGS Specifications for Test Borings and USACE Procedures for Drilling in Earth Embankments. Eight test borings were located at the top and bottom of the dam embankment and the spillway, with piezometers installed in six of the borings. A barge was used to collect borings from the spillway area. AEG provided full-time oversight of the drilling program through certified inspectors to ensure compliance with all contract requirements and specifications.
A Geotechnical Investigation Report was prepared to present the results of the investigation, supported by comprehensive soil and rock testing conducted in AEG’s AASHTO Accredited and USACE Validated laboratory. AEG also provided inspection and oversight of packer testing within the bedrock to determine hydraulic conductivity and completed a Borehole Logging Survey for the two borings at the spillway.


