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COLLINS <br />ENGINEERS <br />March 20, 2023 <br />City of Louisville <br />Signal Pole Inspection 2023 <br />Mr. Charlie Alexander, P.E. <br />Fehr and Peers <br />410 171 St. Suite 1000 <br />Denver, CO 80202 <br />Dear Mr. Alexander: <br />Collins Engineers, Inc. (Collins) is pleased to submit this proposal for the signal pole inspections for Fehr <br />and Peers for structures owned by the City of Louisville, CO (City). <br />Scope of Work <br />• All inspections will be conducted in accordance with the American Society for Non -Destructive <br />Testing (ASNT) procedures and American Association of State Highway and Transportation <br />Officials (AASHTO) specifications. All inspection teams will be lead by a certified Team Leader <br />in the state of Colorado and all NDT testing will be conducted by certified ASNT Level II <br />personnel. <br />• Ultrasonic Testing (UT) will be performed on all accessible anchor bolts at the base plate to test <br />for potential fractures or corrosion that do not reveal themselves on the surface. Any areas where <br />paint was removed to prepare the surface of the anchor bolts for UT will be re -coated with an <br />organic zinc primer (ZRC) and Tnemec 1075-GR (or similar) as advised by the City. <br />• Magnetic Particle Testing (MPT) will be conducted as needed around the circumference of both <br />the base and the upper connection weld. If necessary, paint will be removed to explore the <br />extents of an indication and photographs taken prior to recoating in the same process <br />• A D-meter will be used to measure any loss of section due to corrosion which is typically <br />concentrated at the base of the pole. Remaining section will be assessed in comparison with the <br />measured nominal thickness. <br />• All anchor bolts will be physically sounded and inspected for tightness. <br />• If applicable, the upper luminaire connection will be inspected, and connection bolt tightness <br />verified. <br />Reporting <br />A comprehensive inspection report stamped/sealed by a Colorado Licensed Professional Engineer will be <br />prepared for each traffic signal. The report will include the following: <br />• Pole and mast arm thicknesses (measured with a D-meter) and circumferences at their base (6 in. <br />from the base plate/upper connection weld) <br />• Latitude and Longitude <br />• Vertical clearance for each traffic signal <br />• Mast arm length <br />455 Sherman Street I Suite 160 1 Denver, CO 80203 1 Phone: 303.447.0090 1 Fax: 303.447.9141 1 www.collinsengr.com <br />