CT2017-904 Approval Letter - Laserfiche WebLink

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Julesburg Irrigation District Agenda Item 21c May 18-19, 2016 Board Meeting(Updated May 20, 2016) Page 3 of 4 Project Description The purpose of the Project is to provide a reliable measurement structure for accurately measuring flow in the Harmony No. 1 Canal during the diversion of water for the various water rights being used by the Julesburg Irrigation District. Three alternatives for this Project were considered: Alternative 1 - Take no action: This was considered unacceptable because the failure of the existing structure would make it not possible to measure water delivered, as required by the State Engineers Office. Alternative 2 - Rehabilitate the existing structure: This alternative was ruled out because of the deteriorated and undermined condition of the concrete and sheet piling of the old structure. To rehabilitate the existing structure in-place would drive expenses up to a point of near-total replacement cost for a new structure, but would not address the issue of failed subgrade underlying the structure. Selected Alternative 3 - Construct a new structure: This alternative was chosen to ensure continued operation of a crucial element of the system. This alternative involves the bypass of residual flows, de- watering the Project site, excavating the area upstream of the existing structure, constructing a new weir, placing riprap on the upstream and downstream abutments, and removal of the old structure. The estimated cost of the Project originally was quoted as $216, 729 by Yost Construction and $219,810 by Concrete Specialties. The bids were determined by the District to be too high, but in further conversations with Concrete Specialties, it was suggested to build the structure under a time-and- materials contract with contingencies, with an expected base cost of $160,000. The District has previously hired Concrete Specialties for its Outlet Works project, Inlet Works project, as well as the Lodgepole Creek Structure; all of which were financed with CWCB loans. TABLE 2: ESTIMATED PROJECT COSTS Task Cost Design and Permitting $4,000 Construction $160,000 Contingency $60,000 Total $224,000 Permitting: The District has existing easements for the canal, and is exempt from 404 permitting, as Project construction is for an irrigation diversion and related structure. Schedule: The structure is planned be built in late September through late October of 2016 to allow for filling the Julesburg Reservoir in water year 2017, which begins November 2016.