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<br />Tallman Gulch <br /> <br />New approximate Zone A flooding was added to Tal1man Gulch <br />Tributary from its confluence with Tallman Gulch to a point <br />approximately 2,800 feet upstream. The basis for this revision is <br />a technical report entitled "Flood Hazard Identification Report, <br />Tallman Gulch Tributary 1, Parker, Colorado," prepared by the <br />Department of Natural Resources, CWCB, dated December 1986. This <br />report included the hydrologic and hydraulic analyses for this <br />reach of Tallman Gulch Tributary. <br /> <br />10.2 Second Revision <br /> <br />This study was revised on January 5, 1996, to incorporate the <br />following Letters of Map Revision (LOMRs): <br /> <br />a. The LOMR issued on August 29, 1994, for a reach along Jordan <br />Road Tributary and a reach along Newlin Gulch as shown on <br />Flood Insurance Rate Map Panel 0070. This LOMR was issued to <br />show the effects of the construction of the Jordan Road <br />Tributary diversion channel and two 4-foot by 9-foot box <br />culverts along Jordan Road Tributary from its confluence with <br />Newlin Gulch to approximately 700 feet upstream of Stonegate <br />Parkway, and the effects of updated topographic information <br />along Newlin Gulch from its confluence with Cherry Creek to <br />approximately 2,150 feet upstream of Jordan Road. <br /> <br />The construction of the diversion channel includes the shift <br />of the confluence of the Jordan Road Tributary with Newlin <br />Gulch to approximately 5,500 feet upstream of its previous <br />10cation. The 100-year flood discharge is contained in the <br />diversion channel along Jordan Road Tributary. As a result of <br />the redirection of flow caused by the diversion channel, the <br />Special Flood Hazard Area along Jordan Road Tributary has <br />increased upstream of Jordan Road and been eliminated <br />downstream of Jordan Road. <br /> <br />As a result of this revision, the BFEs have increased a <br />maximum of 5 feet along Newlin Gulch. ApproximateIy 4.9 feet <br />of the increase are due to more detailed topographic data and <br />0.1 foot is due to the construction of the diversion channel. <br />The BFE increases occur from approximately 1,000 feet upstream <br />of the confluence with Cherry Creek to approximately 2,000 <br />feet upstream of Jordan Road. <br /> <br />Profile Panels 73P and 74P and the Floodway Data Table for <br />Newlin Gulch were revised as a part of this LOMR. <br /> <br />60 <br />