Mount Troy Road Meter Vault Replacement

Sci-Tek provided engineering services for the Mount Troy Road Meter Vault Replacement Project for PWSA.  The scope of work included a topographic survey, subsurface exploration for the replacement vault which included “potholing” the existing pavement, and a maintenance & protection of traffic (MPT) plan for construction of the meter vault replacement. Sci-Tek provided the following services:

• Obtained and reviewed available information pertinent to completion of the work which included underground utility drawings, datum references, deeds, and right-of-way plans.
• Performed a PA One Call for design and excavation to obtain available public utility drawings and to have utilities marked in the field to facilitate the survey.
• Performed a topographical survey of 200 ft. of Mount Troy Road, from a point approximately 200-ft west of its intersection with Allen Drive, westerly to just beyond the high point of Mount Troy Road. The survey width was house front to house front on both sides of the road (a width of approximately 130-ft). Sci-Tek collected pertinent topographical features including edges and center of pavement, visible features of subsurface utilities, overhead utilities, driveways, grade changes, permanent structures, and significant vegetation. A topographical plan was generated in AutoCAD showing information collected during the field survey, and converted to a “.DGN” file for use in Microstation InRoads.
• Performed PA One Calls for drilling services according to PA Act 287.
• Drilled one 8-inch diameter, thin-walled, core boring in the roadway near in the proposed area of the new meter vault. The depth of the pavement core boring was limited to the thickness of the pavement plus the subbase which was assumed to be 2 ft. At the same location, a test boring was extended to identify subsurface characteristics. The depth of this boring was limited to 15 ft.  Continuous split-spoon sampling was performed in the soil zone.  Rock encountered was be sampled using NX coring up to the planned depths.
• Drill cuttings from the test borings was placed back into the holes or spread within the apparent right-of-way along the roadway (no cuttings were drummed or removed from the site). The upper 2 ft. of the street opening was backfilled with PA DOT 2A crushed limestone and the asphalt was patched with quick-setting concrete or other PA DOT approved material.
• Provided a full-time project representative during drilling to observe that the work was performed in general conformance with applicable standards, visually describe and log the material sampled, and observe that the backfilling operation was in general conformance with applicable standards.
• Prepared a short letter report with a boring log to summarize the data obtained at the test boring locations.
• Prepared a MPT Plan for the work involved with the meter vault replacement. The MPT plan was submitted to the Authority’s Engineer, AMEC for their use and submission to the City of Pittsburgh. The drawings included a plan view of the area involved, general notes, and the required details in an AutoCAD 2015 “.DWG” format. The MPT was completed in general accordance with PA DOT Publication 213, Temporary Traffic Control Guidelines.