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HomeMy WebLinkAbout02/02/2016 RESERVOIR 17 ROOF REPLACEMENT ($1,562,167) Mount Prospect Public Works Department Reservoir 17 Roof Replacement Attachment A Figure 1 Figure 2 Mount Prospect Public Works Reservoir 17 Roof Replacement Attachment B Reservoir 17 Timeline 1972 Reservoir built by Pittsburg Des Moines tank. Feb 1988 Bid released for interior and exterior painting. March 1988 Interior and exterior painting awarded to Jetco. December 1999 Dixon Engineering inspected tank and prepared detailed specifications for painting interior and exterior and new roof vent. August 2000 MaxCor contracted to make repairs, add roof vent and paint interior and exterior of tank. Dixon Engineering oversaw rehab project. October 2000 Maxcor authorized by Village to install new reinforcement bolts in the roof rafters. 2007 Dixon Engineering reviewed ripples in sidewall of the tank; concluding that ripples existed in 1999 and are of no significance. August 19, 2010 Public Works respond to a resident call about Reservoir 16 where we found the roof had collapsed into the tank. Sep Oct 2010 Insurance inspections and creation of repair specs and plans by Tank Industry Consultants (TIC) for both BPS 16 and BPS 17 reservoir roofs. TIC recommends replacement of approx. ½ of all nuts and bolts for purlins and rafters at Reservoir 17. This work item is placed in plans and specs for Reservoir 16 project. Sept 1, 2010 TIC performs inspection of Reservoir 17 and recommends expanding the replacement from ½ to 100% of the nuts and bolts (approx. 400) at Reservoir 17. Village approves this expansion of scope. November 2010 Board awards roof repairs for both Reservoir 16 and 17 to Chicago Bridge & Iron (CBI). Work at 17 to include replacement of all nuts and bolts on rafters and purlins as noted by TIC in raft inspection of Reservoir 17 ($53,500). November 15, 2010 CBI mobilizes on-site for demo of Reservoir 16. Repairs to Reservoir 17 (the nuts & bolts) scheduled for late winter 2010. January 28, 2011 TIC inspects interior of Reservoir 17 and informs Village that internal inspection of Reservoir 17 shows that approximately 27 purlins have experienced significant metal loss and that these purlins are in inadequate structural authorizes CBI to replace purlins as Change Order #2 ($11,900) March 9, 2011 TIC performs inspection of repairs at Reservoir 17 and notes no structural issues and recommends re-inspection and painting at a future date. February 2013 Roof vent inspection notes issues with roof vent. Summer 2013 Roof vent replaced. November 2013 Roof vent inspection noted no issues. Page | 1 Mount Prospect Public Works Reservoir 17 Roof Replacement Attachment B Reservoir 17 Timeline Sept 2014 Roof vent inspection noted no issues. Sept 2015 Purchase order issued and TIC requested to perform inspection and prepare for creating bids and plans for painting and rehabilitating Reservoir 17 in FY 2016. Sept 2015 Purchase order issued for annual roof vent inspection. October 5, 2015 At approximately 2:30pm staff discovers that roof has collapsed. Cathodic protection system checks are documented annually. Page | 2