GTA performed levee relief well inspection, testing, and sediment removal services on 126 wells associated with the South Williamsport and Williamsport Levee systems, situated along the West Branch of the Susquehanna River. The wells are positioned at the toe of the levee and are designed to relieve hydrostatic pressure during flood conditions. GTA’s services consisted of the following:
- Removed sediment that had accumulated at the bottom of relief wells using an air-lift system designed by GTA.
- Performed step-drawdown pumping tests to estimate 24-hour specific capacity for each well.
- Down-hole video observation to evaluate the condition of well casing and screen.
The results of GTA’s testing and evaluation were submitted to the United States Army Corps of Engineers for their determination of additional rehabilitation measures, as may be applicable.