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<br />-),. <br /> <br />STATE OF COLORADO <br /> <br />Colorado Water Conservation Board <br /> <br />Department of Natural Resources <br />1313 Sherman Street, Room 721 <br />Denver, Colorado 80203 <br />Phone: (303) 866-3441 <br />PAX: (303) 866,4474 <br />www.cwcb.state.co.us <br /> <br /> <br />Bill Owens <br />Governor <br /> <br />July 15, 2003 <br /> <br />Mr. William D. Miller, Project Manager <br />Omaha District, Corps of Engineers <br />CE NWO - PM - C <br />106 South 15th <br />Omaha, Nebraska 68102-1680 <br /> <br />GregE. Walcher <br />Executive Director <br /> <br />; <br />Rod Kuharich <br />CWCB Director <br /> <br />Dan McAuliffe <br />Deputy Director <br /> <br />Dear Mr. Miller: <br /> <br />I appreciated the Corps of Engineers (Corps) involvement in the Cherry Creek Probable <br />Maximum Precipitation (PMP) Technical Review and participation in the June 19, 2003 review <br />meeting in Denver, Colorado. This Board (CWCB) in cooperation with the local government <br />sponsors (Arapahoe and Douglas Counties, City of Aurora and City of Greenwood Village, <br />Colorado) have been tasked for performing a technical review of the Corps and the National <br />Weather Service (NWS) Site-Specific 1995 PMP Study. The CWCB is accomplishing this <br />project by contract with Applied Weather Associates (AW A) for the performance of certain <br />meteorological, climatological, and hydrological tasks using World Meteorological Organization <br />(WMO) PMP procedures. The PMP procedures require professional judgment and knowledge <br />of extreme storm data in the performance of a PMP analysis. Any site-specific investigation <br />requires the regional transposition of extreme storm events. <br /> <br />In addition to the Board's contract with AWA, the Board formed a technical review panel with a <br />make-up of recognized PMP experts to perform technical review for the project. The CWCB <br />feels that the technical review panel comments were addressed and recommendations <br />incorporated to a satisfactory level. The basin project impacts and PMP concerns were <br />addressed through regular meetings of the Cherry Creek PMP Advisory Committee whose <br />membership includes representatives of the cities and counties, professional groups with an <br />interest in the project, agency and organizational officials and a number of citizens. <br /> <br />At the June 19th meeting, the AWA and the NWS presented their respective PMP study findings <br />and provided study comparisons to each other's study results regarding the PMP for the Cherry <br />Creek Basin. These comparisons are presented in the document entitled "Site-Specific <br />Probable Maximum Precipitation (PMP) Study for the Cherry Creek Drainage Basin - Second <br />Final Report Review Meeting June 19,2003 Denver, Co" which is posted on the CWCB web <br />site @ www.cwcb.state.co.us. AWA will incorporate the information and comments that were <br />presented at the June 19th meeting into their draft report entitled "Probable Maximum <br />Precipitation (PMP) Site-Specific Study for Cherry Creek Reservoir dated April 2003". <br /> <br />Flood Protection. Water Supply Planning and Finance. Stream and Lake Protection <br />Water Supply Protection. Conservation and Drought Planning <br />