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09/27/2006 10:20 9702412358 USACE DEPARTMENT aF THE ARMY U.S. ARMY ENGINEER DISTRICT, SACRAMENTO CORPS OF ENGINEERS COLORADO/GUNNISON BASIN REGULATORY OFFlCE 400 ROOp AVENUE, ROOM 742 GRAND JUNcTtON. COLORADO 81507.2563 REPLY TO September 14, 2006 arm ov Regulatory Branch (200675287.) Mr. Dan Fillipi O & G Environmental 11 Inverness Way South Englewood, Colorado 80112 Dear Mr. Fillipi: /~9 We are responding to your request and submittal information for an approved jurisdictional determination for the Hangs Ranch 9`~y~6 project site. This approximately 210-acre site is located at the Colorado River within Section 9, Township 6 South, Range 92 West, Latitude 39° 32' 8.11", Longitude 107° 40' 17.8", Garxield County, Colorado. Based on available information, we concur with the estimate of waters of the United States, as depicted on the September 6, 2006, Hangs Ranch Project site, 2006 Wetland Delineations map, FigurEe 4 drawings prepared by 0 rx d 8nvironmantal Consultants. There are approximately 950 feet of waters of the United States (Colorado River) bordering the north portion of this property. There are also approximately 7.32' acres of wetlands, within the mapped area. We regulate these waters under Section 404 of the Clean Watex Act since they are interstate waters of the United States and adjacent wetlands to the Colorado River. We also concur with the estimate of waters of the United States that are artificially irrigated areae. Areas identified as Section 9; Wet 03, Wet 02, Wet 04 and Wet 01 that total approximately 7.0.03 acres would revert to upland if irrigation ceased. we appreciate the additional monitoring well data supplied by Colorado River Engineering, dated June 5, 2006 (Table 2 of your Addendum) to verify that these areae are solely supported by irrigation. We also understand that the area, identified on Figure 4 of the September 6, 2006 Wetland Delineation Map exists as Potential Wetland/Not Yet Delineated and may be evaluated at a later date. Additionally, property areas north of Interstate Highway 70 and within the highway right-of-way (approximately 98.3 acres) were not delineated and remain un-verified by this office.