CC - Agendas - City Council - REGULAR - 7/23/2013

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Agenda Item: Approval of Change Order No. 11, City Contract No. 2012-183 A11, with A. Miner Contracting, Inc., for construction of the Runway 21 L-3R Runway Safety Area Improvement Project in the amount of $26,272.52 Additional CLSM was used to expedite the installation of storm drain pipes underneath Runway 12-30 in lieu of installing granular backfill. This option provided the least impact to normal operations because a shorter runway closure period was necessary through the use of CLSM. The increased cost of CLSM in lieu of the granular backfill was $24,421.85. The two items resulted in a total net increase to the contract in the amount of $43,311.42. Change Order #10 was for work required by the City's Public Works Department relating to the abandonment of a waterline which crosses underneath Runway 21 L-3R. The abandonment reduces the need for waterline maintenance access and the resulting disruptions to normal airport operations when maintaining an infield water hydrant for fire protection services on the airport. While this abandonment was part of the original plans,. the Water Department later had water quality concerns regarding this dead-end hydrant line and requested the addition of a backflow preventer to isolate the on -airport fire line from the water main feeding it outside the airport. This request was received after the project bids were received. The change order resulted in a net increase to the contract in the amount of $36,045.75. Change Order #11 is for work to seal coat pavement areas where paint markings were previously obliterated -and re -stripe portions of the runway. The seal coat is required to re -seal those affected pavement areas to prevent the pavement from failing and the asphalt becoming loose and potentially damaging aircraft. The Federal Aviation Administration and the Arizona Department of Transportation reviewed the change order request and provided their approvals to proceed with Change Order 11 as specified. Financial The net increase of Change Order 11 is $26,272.52. The City's share of the change order is $656.81. The net increase of all contract Change Orders (1 through 11) is $215,050.13 ($188,777.61 + $26,272.52). This is an overall contract increase of 2.7%. Of the total change order costs to date, the City's additional cost is $5,376.25 (2.5%); ADOT's additional cost is $5,376.25 (2.5%); and FAA's additional cost is $204,297.63 (95%). Attachment - A. Miner Contracting — Change Order #11 Recommended Action: MOVE to approve Change Order No. 11, City Contract No. 2012-183 A11, with A. Miner Contracting, Inc., for the 21L-3R Runway Safety Area Improvement Project in the amount of $26,272.52. K