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1.5 SUBMITTALS <br />A. Provide submittals in accordance with Section 01300. <br />B. The Contractor shall submit a Surface Water Control Plan (Plan) to the Engineer, for <br />review at least ten (10) calendar days prior to starting any onsite construction work for <br />which the surface water control facilities are required. <br />C. If the Contractor purchases, rents, installs, or mobilizes to the site any elements of surface <br />water control systems prior to the Engineer's review of the submittal, it does so at its own <br />risk, and will not be due any additional compensation from the Owner if such elements <br />are not subsequently used for the Work. <br />D. The Plan shall include drawings showing locations, dimensions, and relationships of <br />elements of each system and details regarding the types of various water control facilities <br />and design calculations required to substantiate the Plan. <br />E. For control of surface water, the Plan shall include, but not be limited to, location of <br />diversion ditches, diversion dikes, site restoration, phasing of implementation or removal <br />activities, and the Contractor's proposed cross sections, arrangement, locations, heights <br />and composition of proposed diversion ditches and diversion dikes. <br />1. If Contractor chooses to construct a temporary dam within the diversion ditch to <br />detain storm -water runoff in the ditch above the location of the temporary dam, the <br />dam top elevation should be set such that it does not cause surface water impounded <br />in the ditch to be diverted into the tailing impoundment via the ditch overflow <br />section. It is estimated that the ditch above approximately Sta. 10+50 can store up to <br />an estimated 50 -year storm event without overtopping into the impoundment area. <br />Any temporary dam shall be designed and maintained with a top elevation to avoid <br />overtopping the ditch at the ditch overflow section. <br />F. If systems are modified during installation or operation, revise or amend the appropriate <br />drawings and calculations and resubmit the Plan for review. <br />PART 2 — PRODUCTS (NOT USED) <br />PART 3 - EXECUTION <br />3.1 GENERAL <br />A. The Contractor shall review the available hydrologic analyses and data. It shall be the <br />Contractor's responsibility to evaluate the surface water control facilities. <br />B. Continuously control water at all times, including weekends and holidays and during <br />periods of work stoppages, and provide adequate backup systems to maintain control of <br />water. <br />Surface Water Control February 2017 02230-2 <br />