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? retained in Lake McConaughy for carry-over purposes. <br />Estimate of WY08 EA Carry-Over: <br />WY07 Carry-Over 97,633 <br />10% Storable Natural Inflows + 32,600 * <br />Evap & Seepage Loss - 15,000 * <br />EA Pulse Flow Release - 25,000 * <br />EA Summer Flow Augmentation - 30,000 * <br />WY08 EA Carry-Over 60,233 * *= Esrimate <br />Factors Considered For Reregulating Water and EA Bypass <br />The Program is currently conducting a Water Management Study to develop and implement a <br />plan to deliver 5,000 cfs of Program water for three days to the upper end of the habitat area <br />(Overton gage) for pulse flows when other demands on water are low. Actual implementation of <br />the plan will be in a phased and incremental fashion, and therefore, any initial pulse flow release <br />from the EA is expected to be within the existing and currently limiting constraints. Constraints <br />include, but are not limited to, the NWS flood-level at North Platte, and the initial amount of <br />reregulating space of 4,000 af to be made available in CNPPID's system as part of a test to see if <br />that amount can be increased up to 12,000 af of reregulation space (see Appendix D- Program <br />? Water Management Process). <br />It is important to note that before any EA bypass can be implemented, that (a) congressional <br />authorization must be passed in order to use federal funds for EA bypass costs (or appropriate <br />Program arrangements made to utilize State-only funds), (b) the EA Bypass Agreement must be <br />signed between the Districts and the Nebraska Community Foundation, and (c) the provision of <br />insurance needs as described in the EA Bypass Agreement must be in place. Additionally, the <br />initia14,000 af of reregulation space in CNPPID's system is contingent on the EA Bypass <br />Agreement being signed. <br />Given that an initial pulse flow release, (a) will intentionally be relatively small, (b) will be <br />primarily a learning experience, and (c) is a necessary first-step towards implementing a more <br />effective pulse as system constraints, potential "associated costs", and safety concerns are <br />addressed, the following factors are evaluated in that context. <br />(1) Feasibility/likelihood ofgenerating satisfactory flows without reregulation and <br />intentional EA bypass: <br />It is the Service's assessment that an effective pulse flow can best be implemented by <br />increasing the NWS flood-level at North Platte to at least 3,000 cfs, utilizing the extent of <br />reregulation space made available in Johnson Lake (initial test of 4,000 af, and potential <br />for increased volume), and providing for EA bypass at the CNPPID diversion. Meeting <br />these needs and increasing ramp rates at Lake McConaughy above 300 cfs per day would <br />? lessen the amount of EA expended for a pulse flow and the amount of requested EA <br />bypass at the CNPPID diversion for pulse flow implementation. <br />Water Year 2008 EA AOP 12 October 15, 2007