Central Colorado Approval Letter

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Central Colorado Water Conservancy District Agenda Item 29e May 9,2014(Updated May 23,2014) Page 2 of 7 (INFORMATION IN SMALL CAPS IS COMMON TO ALL CHATFIELD REALLOCATION LOANS) CHATFIELD REALLOCATION PROJECT CHATFIELD DAM AND LAKE(CHATFIELD)IS AN ON-STREAM RESERVOIR BUILT IN 1973. IT IS LOCATED IMMEDIATELY DOWNSTREAM OF THE SOUTH PLATTE RIVER AND PLUM CREEK CONFLUENCE ABOUT 8 MILES SOUTH(UPSTREAM)OF DENVER.CHATFIELD CONSISTS OF AN EARTHFILL DAM APPROXIMATELY 13,000 FEET LONG WITH A TOP WIDTH OF 30 FEET AND A MULTI-PURPOSE RESERVOIR WITH A STORAGE CAPACITY BELOW THE SPILLWAY OF APPROXIMATELY 235,000 ACRE-FEET(AF). DENVER WATER IS CURRENTLY THE SOLE USER OF CHATFIELD FOR WATER SUPPLY AND HAS THE EXCLUSIVE RIGHT TO STORE WATER IN THE CONSERVATION POOL(BETWEEN 5423 AND 5432 MSL).COLORADO PARKS&WILDLIFE MANAGES CHATFIELD'S RECREATIONAL AND FISH AND WILDLIFE USE THROUGH CHATFIELD STATE PARK.THE US ARMY CORPS OF ENGINEERS(CORPS)MANAGES THE FLOOD CONTROL USE, PROVIDING FLOOD PROTECTION TO THE DENVER METRO AREA. IN THE MID-1990S,THE COLORADO DEPARTMENT OF NATURAL RESOURCES(DNR),ACTING THROUGH THE COLORADO WATER CONSERVATION BOARD(CWCB)AND ON BEHALF OF NUMEROUS LOCAL WATER PROVIDERS,REQUESTED THE CORPS TO REALLOCATE A PORTION OF CHATFIELD'S FLOOD CONTROL STORAGE • TO CONSERVATION STORAGE FOR WATER SUPPLY PURPOSES.THE CORPS' CHATFIELD ANTECEDENT FLOOD STUDY(2005)SHOWED THAT FLOOD CONTROL STORAGE SPACE BETWEEN ELEVATIONS 5432 AND 5444 MSL COULD BE REALLOCATED WITHOUT COMPROMISING THE FLOOD PROTECTION OFFERED BY CHATFIELD. TO EVALUATE THE ENVIRONMENTAL, SOCIAL,AND ECONOMIC EFFECTS OF THE PROPOSED REALLOCATION, THE CORPS INITIATED THE FEDERAL FEASIBILITY REPORT AND ENVIRONMENTAL IMPACT STATEMENT (FR/EIS)IN 1999.THE FINAL FR/EIS WAS RELEASED BY THE CORPS IN JULY 2013 AND THE PUBLIC COMMENT PERIOD HAS ENDED. THE FR/EIS RECOMMENDS A REALLOCATION FROM FLOOD CONTROL TO CONSERVATION AND WATER SUPPLY OF 20,600 AF.THE CORPS IS EXPECTED TO ISSUE THE FINAL RECORD OF DECISION IN 2014. THE CURRENT WATER PROVIDERS INVOLVED IN THE REALLOCATION ARE SHOWN IN TABLE 1 BELOW: TABLE 1: CHATFIELD REALLOCATION PARTICIPANTS PARTICIPANTS STORAGE AMOUNT %OF T_TOTAL COLORADO WATER CONSERVATION BOARD SHARES TRANS!'ERRED 01?PENDING TRANSFER FROM: CITY OF AURORA 3,561.0 AF WESTERN MUTUAL,DITCH COA i!'ANY 1,425.0 AF 6,586.0 AF 31.97% COLORADO PARKS& W11.DI.11,1: 1,000.0 AF ROxBOROUGH 500.0 AF PERRY PARK 100.0 AF CENTENNIAL WATER AND SANITATION DISTRICT 6,434.9 AF 31.24% CENTRAL COLORADO WATER CONSERVANCY DISTRICT 2,849.0 AF 13.83% SOUTH METRO WATER SUPPLY AUTHORITY ENTITIES 70 RE(Z•1 t"E SHARES: CENTENNIAL WA7ER AND SANIIA/IONDLS1RIOT 487.2 AF TOWN or CAS7D:ROCK 487.2,4F ACWWA 121.6 AF CAS77,E PINES NoRrx METRO DIS7RICr 64.3 AF 1,418.6 AF 6.89% COT90NWOOD 64.3 AF' SIONEGATE 64.3 AF PINE1?Y 64.3 AF RoxAonot4GH 64.3 AF CASTLE PINES METRO DIs1EtC T 1.1 AF • TOWN OF CASTLE ROCK 1,013.1 AF 4.92% CASTLE PINES NORTH METRO DISTRICT 941.5 AF 4.57% CASTLE PINES METRO DISTRICT 785.6 AF 3.81% MOUNT CARBON METRO DISTRICT 400.0 AF 1.94% CENTER OF COLORADO WATER CONSERVANCY DISTRICT 131.3 AF 0.64% DENVER BOTANIC GARDENS AT CHATFIELD 40.0 AF 0.19% TOTAL 20,600 AF 100.00%