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COLORADO WATER CONSBRVATION BOARD TOUR Lower South Platte River May 13, 1996 Tour Item 1: Bill Condon Recharqe and Auqrnentation proiect (See attached data sheet and map). Appropriation Date of April 3, 1976 (W-8460-76) for an Augmentation plan to replace out-of-priority depletions of 15 existing irrigation wells. Replacement supplies come from 5,000 acre-feet of underground storage with an enlargement of an additional 2,000 acre-feet filed in 1995. Underground storage is achieved by delivery to three recharge ponds from three pumping plants next to the river during mainly the late fall and winter months. Uses include irrigation, municipal, environmental mitigation, wildlife conservation, etc. through direct use or by means of recharge, augmentation, substitution, and exc~~ge. The City of Central leases annually 539 acre-feet of excess accretion credits from the Bill Condon recharge project during April through July for stream flow augmentation as a 0.5. Fish & wildlife Service condition in a 404 permit for Central's newly constructed Chase Gulch Reservoir in G11pin County. Tour Item 2: Tamarack Ranch State ~ildlife Area Potential Recharae proiects (See attached Division of Wildlife map). As part of 3-State discussions on a Platte Basin Endangered Species Recovery Program, Colorado ~II proposed the "Tamarack Plan" which would reregulate annually 10,000 acre-feet of water leaving Colorado on the South platte. This reregulation would occur through groundwater recharge and storage in the lower South Platte from Tamarack to the Stateline using pumping projects like Bill Condon's and recharge in existing ditch systems. A demonstration recharge project is proposed for implementation in 1996-97 at the Tamarack State wildlife Area with a pumping plant next to the river for delivery of water to recharge ponds about 1 mile south of the river as shown on map. Tour Item ): Julesbura (Jumbo) Reservoir Outlet Rehabilitation - JulesburQ Irriqation District Authorization. sa 86-27 Water Source: S. Platte River/Harmony Ditch #1 Terms of Loan: $325,000 ~ 5' for 40 years County: Sedg~icx Project Yield: 6,000 ac.ft. project Type: Dam Rehabilitation Construction of a new outlet works and placement of a new embankment has been ctmq1leted just downstream of Dam ~umber 4 of Julesburg Reser.)ir. Construction of new concrete outlet works downstream of the old dam and outlet has allowed near-normal storage in th~ reservoir throughout construction. Placement of rip-rap on the new section and removal of the old outlet and darn section has been re-scheduled tor completion by the Julesburg Irrigation District in November 1996. Tour Item 4: Julesburo Gaoe IStateline - Interstate Stationl (See attached sheet and map on South "latts River Compact). The main administrative aspect of the South Platte River Compact with Nebraska is Article IV (2) which states: "Between the first day of April and the fifteenth day of October of each year, Colorado shall not permit diversions from th. Lower Section ot the river, to supply Colorado appropriations having adjudicated dates of priority subsequent to the fourteenth day of June, 1897, to an extent that will diminish the flow of the river at the Interstate Station, on any day, below a mean flow of 120 cubic feet of water per second of time.....