The Challenge

Lehigh Valley Hospital -- Cedar Crest was erecting new buildings for the hospital. Before construction began, the hospital called upon Master Locators to perform several of our services, including private utility locating, ground penetrating radar, CAD & utility mapping and vacuum excavation. Through these services, we were able to provide a report to the Lehigh Valley Hospital that included the estimated depths of the private utilities, test hole data sheets and a CAD map.

How We Did It

Master Locators started off this project by locating the outside vault walls and wall thickness, which took two full days of air vacuum excavation work. Prior to conducting the vacuum excavation, Master Locators placed a One Call to come mark out any public utilities that might be inside the walls as well as a UGI gas line in the Jaindl family pavilion. During the excavation for both projects, a PIDCOCK representative was onsite to collect vertical and horizontal survey information. 

The vault required some additional work from our team. Since the vault was rectangular, four test pits were required to expose the outer walls; one test pit per wall. To obtain the wall thickness, Master Locators used a laser measuring device and a tape measure to locate the distance from the manhole lip to the inner wall of the vault. After calculating the wall thickness, Master Locators used a saw to cut through the concrete and used vacuum excavation to remove the dirt presence. 

Within the 14 acre area of the scope of work, Master Locators scanned for all locatable utilities and performed test pits to provide Quality Level A data on the existing utilities. Then, Master Locators provided surveying and AutoCAD services to incorporate all field findings into an existing client provided AutoCAD basemap.

Per the client’s request, Master Locators returned to the site to provide additional vacuum excavation services for the purpose of locating a tunnel. We saw cut and exposed a trench approximately 3 feet 4 inches long x 1 foot 6 inches wide to expose the side of the tunnel. We exposed the edge of the tunnel running under the water line. Our technicians felt the edge of the tunnel but could not expose to confirm as a visual. However, we were able to expose the tunnel at a depth of 8 feet 6 inches.

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