Specifications include, but are not limited to: Utility subsurface locating and potholing services to support on-going design and construction efforts for Capital Improvement Projects throughout the City. The consultant will be responsible for identifying utility attributes such as size, material type, age, condition, ownership, and number of conduits while determining the accuracy of both the horizontal and vertical locations of the top and bottom of the utility while being referenced to an approved City of Mesa project survey datum. Collection of data will follow the guidelines outlined in CI/ASCE 38-02 “Standard Guideline for the Collection and Depiction of Existing Subsurface Utility Data” or its updated version. Collected data will seek to obtain quality information which includes outside diameter, configuration of utilities, material composition, elevations, photos, paving thickness and type, and general soils conditions, and another pertinent information as is reasonably ascertainable from each test hole site. This data will be formatted and provided to the City and stamped by a registered professional seal (surveyor or engineer) as an electronic excel spreadsheet (Exhibit A) for incorporation into the maintained GIS database of potholing data, to be managed by the City of Mesa. The intent of this investigation is to reduce as much as possible the risks associated with unknown or mis-located utilities. The result of this design service and product, when done correctly, can significantly reduce construction cost, improve construction schedules, minimize utility services disruptions, and reduce contractor’s claims inherent to work around existing underground utilities.
