INVESTIGATION/REMEDIATION OF SEEPAGE CONDITIONS AT EAST BRANCH DAM D’Appolonia performed a comprehen- sive geotechnical exploration at the East Branch Dam located on the East Branch of the Clarion River in Elk County, Pennsylvania, for the Pitts- burgh District of the U.S. Army Corps of Engineers (USACE). East Branch Dam is a compacted earth- fill structure with the primary spillway tunnel passing beneath the right abut- ment and the emer

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