09/23/2014 - Laserfiche WebLink

Home Browse Search

INDIAN RIVER COUNTY, FLORIDA MEMORANDUM Assistant County Administrator / Department of General Services CONSENT AGENDA To: The Honorable Board of County Commissioners Thru: Joseph A. Baird, County Administrator From: Michael C. Zito, Assistant County Administrator Date: September 10, 2014 Subject: Request for Approval of Change Order #1 to Contract with Duininck, Inc. for Dunes Golf Course Irrigation System Project — Sandridge Golf Course BACKGROUND: 'On March 18, 2014, the Board awarded and entered into an agreement with Duininck, Inc. for Bid #2014024 to replace the irrigation system originally installed at the opening of the Sandridge Golf Club in 1987. Following the award, at the preconstruction meeting, the contractor discussed the possibility of needing to adjust the number of sprinkler heads due to the lack of specificity in the original subsurface plans from 1986. As the project was unearthed, the contractor discovered the need to install 23 additional sprinkler head systems and to replace corroded metal piping in the original system. The total cost of Change Order #1 is offered at $12,080 which fraction of this $1.2 million dollar project. No other change orders are anticipated at this time as the project is nearing completion. DESCRIPTION AND CONDITIONS: Duininck, Inc. installed 993 valve -in -head sprinklers and now seeks approval of the additional 23 for a total of 1,016 valve -in -head sprinklers. The connection they were to use was an old metal corroded pipe and the pipe outlet was reduced to a smaller size than what contractor was hooking up to, so it advisable to do this work now and have a clean connection with the correctly sized outlet. The bid documents do not specify to connect to the existing pump above or below ground. The contractor built a new Z configuration so as not to have to rely on trying to connect to existing old and corroded metal pipe. Much of the connection price is to change out an existing bottleneck reducer that was installed when the new pump station was purchased years ago. The existing pump header is 10 inches in diameter and the Z pipe is 12 inches in diameter yet the pump goes from 10 inch to 8 inch then 8 inch to 12 inch with a bottleneck in the middle. Parts were purchased to remove this 8 x 10 bottleneck to make a clean 10 x 12 connection to new Z pipe. The contractor also needs to include a saddle on the new pipe to accommodate the flow meter. The system will be complete with HDPE pipe all the way above ground and will eliminate the very old existing bare metal pipe that is in the ground currently below or at the existing water table. The project, upon completion, is expected to have a useful life of over 30 years. F:\Assistant County Administrator\AGENDA 1TEMS\2014\BCC 09 SEP 2014\BCC Memo - Change Order 1 - Duininck $12,080.00.doc 95