Laserfiche WebLink
AM-06 Stipulations <br />5-10-11 <br />V. Climax will provide a calculation of the tributary area to the East <br />Interceptor Ditch prior to alteration of the East Interceptor Ditch, and will provide an <br />estimate of the modified East Interceptor drainage area. <br />(b) Robinson Lake operations: <br />i. An Operating Plan, to be included in the EPP, will be established <br />for Robinson Lake Reservoir to prevent overflow through the spillway under the <br />conditions described in subsection (ii) below. <br />ii. The EPP will include discussion of flood storage in Robinson <br />Lake. At a minimum, the Operating Plan will require Climax to maintain available <br />storage capacity for the state-approved Site-Specific PMP event plus seepage water from <br />the 1 Dam, 4 Dam, and Robinson Dam seepage collection systems. Additional storage <br />capacity for the 100-year snowmelt will be required during the times of the year when <br />snowmelt is occurring. The assumptions on which the operating criteria will be based <br />should include operating parameters that would accommodate a failure of Chalk <br />Mountain Interceptor during a PMP, and the assumption that Chalk Mountain Reservoir <br />will spill into Robinson Lake. Flood routing analysis for Robinson Lake will be <br />incorporated into site-wide modeling for all Climax facilities. If Climax intends to rely on <br />removal of water by pumping from Robinson Lake via the barge system or other system, <br />this removal will be modeled in conjunction with other flood modeling (as an inflow to <br />the Tenmile Creek basin) to ensure that these facilities in the Tenmile Creek Basin will <br />have adequate storage and/or discharge capacity to handle the added flow. <br />iii. The Robinson Lake Operating Plan will include procedures that <br />will prevent Robinson Lake from being used for flood storage from Tenmile TSF or <br />Robinson TSF when doing so would result in water levels in the lake that exceed the <br />operational thresholds required for storage of water from the Eagle River Basin plus <br />additional seepage flows identified in the operational rules. Climax's currently-approved <br />CDPS permit acknowledges the possibility of bypass and upset events through the outfall <br />on Tenmile Creek. Flood flows would not be routed to Robinson Lake from the Tenmile <br />Creek basin during such events when doing so would be contrary to the Robinson Lake <br />Operating Plan. <br />iv. An annual report will be prepared that documents the flood storage <br />and release status for the year. Climax will provide a copy of this report to Eagle Park <br />Reservoir Company and the Clinton Ditch & Reservoir Company concurrently with its <br />provision to the Division. <br />(c) Eagle Park Reservoir: <br />i. The Revised EPP, and the SPCC and MCP documents for the Site, <br />will remove all references to the use of, or reliance on, Eagle Park Reservoir as a <br />containment or environmental protection facility. <br />ii. Updates and future revisions to the EPP shall not include reference <br />to any MCP or SPCC that provides for the use of Eagle Park Reservoir as a containment <br />facility.