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streamflow, climate and water uses, as well as tabulations of water rights and water management policies. Data are keyed to locations in the river basin using a geographic information system. This computer-based system allows decision- makers to access water resource data and to simulate potential decisions and policies, and examine potential consequences. CRDSS is 98% complete and is being used as a management to in all of the 5 major river basins. Grand Vallev Water Users Association Authorization: SB 97-008 Water Source: Colorado River Location: Mesa County - N. of Grand Junction Grand Vallev Water Management Proiect Grant Amount: $1,250,000 Project Type: Irrigation Canal Rehab. Project Manager: Randy Seaholm This project is the construction of check structures and automated control systems in the Government Highline Canal near Grand Junction. The project is designed to conserve water by reducing late summer spills from the Government Highline Canal and to use as much of the conserved water as possible to increase flows in the Colorado River and help recover endangered fish. The project is in conjunction with the CWCB, the Grand Valley Water Users Association and the Bureau of Reclamation. The grant funds will be used for long term maintenance and operation of the system. The Association has invested the grant funds in long-term securities, thus developing a cash flow to be used for the project expenses. The Bureau has awarded the check structure construction contract to May Concrete, Inc. of Grand Junction. Construction will commence in November 2000 and be completed by April I, 2001. Denver Museum of Natural Historv - Denver Basin Aquifer Core Studv Authorization: HB 98-1189 Grant Amount: $90,000 Water Source: Denver Basin Aquifer Project Type: Grndwater Investigation Location: Elbert County, I mi. E. of Kiowa Project Manager: Mike Serlet This project is the acquisition of a 2,200-foot core of the Denver Basin aquifers near Kiowa in the central Denver Basin. The purpose of the core is to help develop an integrated hydrologic and geologic framework for the Denver Basin aquifers. This will enable State, County, and municipal planners to promote appropriate development of the Basin's water resources. This core-drilling project is part of a three-year National Science Foundation research study that will focus on the evolution of the Denver Basin and its landscapes. Drilling commenced March I, 1999 by Layne Western, Inc. and was completed in April. Core analysis will continue for three years. CWCB/U.S. Armv Corns of Engineers - Chatfield Reservoir Reallocation Studv Authorization: HB 98-1189 Grant Amount: $500,000 Water Source: South Platte River Project Type: Reservoir Supply Study Location: 10 miles S. of Denver Project Manager: Larry Lang This project involves cooperating with the Corps of Engineers for the performance of a feasibility study regarding the reallocation of existing flood control storage to a multi-purpose use. A Scope of Work and contract has been executed to investigate the opportunities and feasibility for the reallocation of certain storage volumes. The contract will determine reallocation opportunities and impacts, environmental assessments, plan formulation recommendations, and formal request to higher Corps authority. CWCB - Cherry Creek Flood Safetv Investigation Authorization: SB 99-173 Water Source: Cherry Creek Location: Southeast Denver Metro Grant Amount: $75,000 Project Type: Flood Control Proj ect Manager: Larry Lang This project is a technical review of the Corps of Engineers and National Weather Service July 13 1995 Probable Maximum Precipitation (PMP) Study for the Corps Dam Safety Investigation ofthe Cherry Creek Dam and Reservoir. The Board staff in cooperation with the Cherry Creek Work Group has selected Applied Weather Associates to perform a PMP review and a new site specific PMP analysis. The contract is now underway and work will begin on this project around February 1,2001. 24