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Precisely collecting data without distorting results using our extensive knowledge of local geology.
Water well drilling & pump services, Geothermal well drilling & loop installation with ground-loop connection.
Full service traffic management for your roadway projects in Maryland and Virginia.
We’ve been industry leaders in the drilling business since 1991.
Our drillers have a combined total experience of 100+ years.
We extend our services beyond Maryland and Virginia to include West Virginia, Pennsylvania, Delaware and Washington, D.C.
Safe, Timely & Quality Drilling
Connelly & Associates
1513 Tilco Drive
Frederick, MD 21704