Laserfiche WebLink
-16- <br />A discussion of possitiie impacts can be found in the Cumulative xydrologic <br />Impact section of this document. <br />[Jith the acceptance of the above stipulations, the proposed operation is in <br />compliance. <br />y7, Surface water Hydrology - Rules 2.04.5, 2.04.7, 2.05.3(4), 2.05.6(3), <br />and 4,05 <br />Information pertaining to surface water quality and quantity can be found <br />in Section 2.04, Volume I of the permit application. Information pertaining <br />to sediment control structures can be found in Section 2.05, Volume I and <br />Exhibit 22, Volume N of the permit application. <br />The proposed permit area is drained by one perennial drainage, Stollsteimer <br />Creek. Flows in Stollsteimer Creek vary seasonally in response to snowmelt <br />and intense thunderstorms. Stollsteimer Creek receives flow from numerous <br />ephemeral drainages Located up and down its course, This creek is dammed <br />in numerous locations above the proposed permit area, the closest dam being <br />located at Capote Lake, approximately 5 miles upstream. <br />The Landowner has constructed an irrigation ditch which runs adjacent to the <br />creek. This ditch is periodically dammed and the subsequent overflow used <br />to flood irrigate his pasture, located along the western edge of the active pit. <br />A11 runoff generated from disturbed portions of the operation is routed <br />through sediment crontrol structures constructed by the applicant. There <br />are four sediment ponds. Sediment pond 002 is located on the western edge <br />of the active workings, Sediment pond 003 is located on the eastern edye <br />of the permit boundary. 4tro sediment ponds, 004 and 005 have yet to be <br />constructed. These ponds will serve as sediment control structures when the <br />operation expands to the west, <br />A11 of the above-mentioned sediment ponds were designed and constructed or <br />wi21 be constructed under the supervision of a registered professional engineer. <br />The ponds will contain the runoff from a 10-year, 29-hour precipitation event <br />without discharging. T.he emergency spillway wiZ2 pass a 25-year, 24-!your <br />event and still maintain the required freeboard. <br />~Naintenance of the ponds include periodic inspections to ensure the integrity <br />of the structure. Sediment volumes are checked monthly and cleaned when <br />60~ of the design sediment storage volume is attained. See the Cumulative <br />Hydrologic Impact section of this document for a discussion of possible <br />surface water impacts to the prevailing hydrologic balance. <br />The applicant has requested tt:at the Division review the baseline surface <br />water monitoring data in the application for a possible reduction of the <br />number of chemical parameters sampled. The Division has reviewed the data <br />and the following stipulation will become Chimney Rocks' surface water <br />monitoring requirements upon permit issuance: <br />