12-28-2015 Council Packet - Laserfiche WebLink

Home Search

5 2.2.4 Exterior Dry Coating The tower was built and the exterior, with the exception of the roof, was last coated in 1992. According to the owner's records, the coating on the roof was completely replaced in 2012. The exterior coating appears in good to excellent condition, with less than two percent overall coating failures with these failures randomly located. While the coating is now 22 years old and has achieved its intended service life, its condition indicates that it has the ability to provide adequate corrosion protection for an additional five to seven years. However, to facilitate interior coating replacement and structural modifications, spot coating repairs will be required in conjunction with the interior coating replacement. The remainder of the tower should be reinspected and reevaluated in three to five years to determine when exterior coating replacement will be required. See photos in Appendix A. 2.3 Repair and Reconditioning Cost Estimate The costs for structural repairs, replacing the interior wet coating, and repairing the interior dry and exterior coatings are estimated at $405,900.00. This estimate is based on current pricing. For up-to-date competitive bids the project should be bid 9 to 12 months before the scheduled starting date. An experienced tank -coating contractor with the proper crew and equipment should be able to complete the project in eight (8) weeks. At the time of reconditioning, the tower will need to be drained and remain off-line during interior structural modifications, abrasive blasting and painting. 2.4 Remaining Tank Life Based on the inspection data, if the recommended structural repairs and coating replacement are completed within the next 2 to 3 years, the tank will be satisfactory for continued service provided that it is inspected and maintained regularly. The tank and coating should first be inspected within the warranty period and every three to five years thereafter. New interior and exterior coatings, if applied and maintained properly, should last at least 20 years.