|
<br />,
<br />
<br />2
<br />
<br />The base flood elevations (BFEs) increased and decreased along the affected portion of Ritle Creek
<br />Splittlow, The BFEs increased from Rifle Creek Splitflow's contluence with Rifle Creek to 30th Street.
<br />The maximum increase in BFE, 4,3 feet, occurred at Ritle Creek Splitflow's confluence with Ritle Creek,
<br />The BFEs decreased from 30th Street to the City of Ritle's corporate limits at County Road 291, The
<br />maximum decrease in BFE, 4 feet, occurred just downstream of the City of Rifle's corporate limits,
<br />Because the flowpath of Rifle Creek Splitflow no longer divides just upstream of 30th Street, the tloodway
<br />and Special Flood Hazard Area (SFHA), an area inundated by the base flood, previously associated with
<br />the flow splitting from the east bank have been removed from the FIRM and FBFM. The maximum
<br />decrease in SFHA width, 700 feet, occurred approximately 450 feet downstream of 30th Street. The
<br />SFHA width increased and decreased along Ritle Creek Splitflow and its boundary delineations shifted
<br />approximately 400 feet west of the SFHA shown on the effective FIRM and FBFM. The maximum
<br />decrease in SFHA width, approximately 300 feet, occurred approximately 300 feet downstream of Rifle
<br />Creek Splitflow's contluence with Ritle Creek, The maximum increase in SFHA width, 250 feet,
<br />occurred approximately 300 feet downstream of 30th Street. The floodway width decreased along the
<br />entire reach of Rifle Creek Splitflow. The maximum decrease in tloodway width, approximately 300 feet,
<br />occurred approximately 550 feet upstream of 30th Street.
<br />
<br />The BFEs increased and decreased along the reach of Ritle Creek affected by the changes in the flowpath
<br />of Rifle Creek Splitflow, The BFEs increased along Rifle Creek from approximately 2,600 feet upstream
<br />of Old Creek Meadows Bridge to approximately 3,470 feet downstream of County Road 291. The
<br />maximum increase in BFE, 4.3 feet, occurred at the confluence of Ritle Creek and Rifle Creek Splitflow,
<br />The BFEs decreased from approximately 3,470 feet downstream to approximately 1,350 feet downstream
<br />of County Road 291. The maximum decrease in BFE, 0.5 foot, occurred approximately 2,000 feet
<br />downstream of County Road 291. The SFHA width increased and decreased along Rifle Creek. The
<br />maximum increase in SFHA width, approximately 200 feet, occurred approximately 400 feet upstream
<br />of the confluence of Rifle Creek and Rifle Creek Splitflow. The maximum decrease in SFHA width,
<br />approximately 150 feet, occurred approximately 1,900 feet downstream of County Road 291, The
<br />floodway width does not change along Rifle Creek.
<br />
<br />A separate LOMR was issued on the same date as this LOMR to describe the effects of this revision on
<br />the unincorporated areas of Garfield County, Colorado,
<br />
<br />The modifications are shown on the enclosed annotated copies of FIRM Panel 1352 D, FBFM Panel 1352,
<br />Profile Panels 9P through 12P, and the Floodway Data Table for Rifle Creek Splitflow and Rifle Creek,
<br />This LOMR hereby revises these panels of the effective FIRM and FBFM and the Flood Profiles and
<br />Floodway Data Table in the FIS report, all dated January 3, 1986. This revision eliminates Profile
<br />Panel 13P,
<br />
<br />The following table is a partial listing of existing and modified BFEs:
<br />
<br />Location
<br />
<br />Existing BFE
<br />(feet)*
<br />
<br />Modified BFE
<br />(feet)*
<br />
<br />Rifle Creek Splitflow:
<br />At revised contluence with Rifle Creek
<br />Just downstream of County Road 291
<br />
<br />5,434
<br />5,461
<br />
<br />5,439
<br />5,457
<br />
|