Platte River Endangered Species Cooperative Agreement

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DRAFT 12/10/01 by 7on Altenhofen subject ti following presented and discussed at WMC-T. some follow-up discussions by email. Discus: continue at future meetings. COLORADO'S T Operations A. Cooperative Amement Issues (1) Tab 3A (Colorado's Tamarack Plan) lists South Platte River Compact requirements we: USFWS year round target flows at the Grand Tab 3A presents a historical analysis for the F 30,000 acre-feet per year could have been div Tab 3A analysis has been referred to as Tama Issue: In negotiating and signing the CA, the operating criteria for diversions for Tamarack Issue: If the Environmental Account in Lake i is a flow shortage (i.e., no excess) with respec wells will not be diverting by the above criteri revisions/corrections by all parties. The M Subcommittee Meeting 12/03/01 with ons and resolutions of these issues will CK PLAN nd Issues operating criteria for diversions: (1) satisfied and (2) flows exceeded the land gage on the Platte R'iver in Nebraska. iod 1943-1994 shawing an average ted under these operating criteria. The ck Phase l. es agreed that these were the only two 3e 1. ZcConaughy is releasing water, then there to USFWS targets and Tamarack Plan (2) Tab 3A states that Tamarack Plan facilitie may be used for other purposes such as augmentation. This means that the water dev loped through the Tamarack Plan may go to other uses. The Tamarack Plan is a manag d groundwater recharge project. The accretions back to the river from recharge wi senior downstream Colorado call or S. Platte less than 120 cfs for April 1- Oct 15), then these senior demands for irrigation/augment times will not be credited towards the Tamar by the Tamarack Tracking and Accounting S 11 occur year round. If the river is under a ompact requirement (i.e., state line flow th Tamarack accretions can be diverted by at on. The Tamarack accretions during these a k Plan and will not be routed downstream Issue: Senior downstream irrigation canals in can divert Tamarack accretions (i.e., will not 1 water) when a sen'ior Colorado call or the S. F canals diverting entire river). B. Water Action Plan Issues Colorado's Tamarack Phase 3 is an expanded provide more water for the Platte River Progr: make use of excess aceretion credits associate aze not needed for well augmentation. There existence prior to July 1997 that produce exce augmentation because there is no call on the r winter months (i.e., November through Marct 'olorado and Nebraska's Western Canal ve to bypass Tamarack Plan aecretion tte Compact requirement is in effect (i.e., se of managed groundwater recharge to i. As part of this effort, Colorado will with cunent ditch recharge programs that e decreed ditch recliarge programs in accretions not needed for well er. This is especially true for most of the These excess accretions will be routed