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FLOOD00197
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Last modified
11/23/2009 1:37:51 PM
Creation date
10/4/2006 9:08:39 PM
Metadata
Fields
Template:
Floodplain Documents
County
Hinsdale
Community
Lake City
Stream Name
Henson Creek
Title
Reconnaissance Study Henson Creek at Lake City
Date
11/1/1991
Prepared For
Lake City
Prepared By
US Army Corps of Engineers
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br />The stream valley above the Henson Cree:<: study reach is very <br />narrow and steep. Trees and brush grow out (If the channel sides <br />in many locations. The steep mountain terrain contributes <br />sediment loads which are washed downstream and deposit as gravel <br />bars at the lower elevations. <br /> <br />3. Scope of Studv. This reconnaissance rep,jrt was prepared to <br />as Hess Federal interest in flood control on :;tenson Creek in the <br />To~m of Lake City. The flood-prone area ext'iinds from the Highway <br />149 bridge which crosses Henson Creek to the mouth of Henson <br />CrE!ek canyon. The study reach is about 1,003 feet long. By <br />le1:ter dated 11 June 1987 (Appendix A), the 'rown of Lake City <br />requested flood control studies for this area. The study reach <br />contains residential and commercial building:~ set back from the <br />crE!ek but within the flood plain. The downt,jwn commercial area <br />prone to flooding from Henson Creek has been designated by the <br />State of Colorado as a Historic Preservation District. <br /> <br />The scope of the planning work included consideration of <br />bo1:h structural and nonstructural flood contrrol solutions. The <br />Tmm of Lake City has expressed interest in ,'1 structural solution <br />wh:.ch could be incorporated into a riverfront: park and bicycle <br />trail system. <br /> <br />4. Studv Participants and Coordination. Th,'1 study sponsor is <br />thE! Town of Lake City. Coordination has bee:ll maintained with <br />La}:e City throughout the study. Hinsdale CO'.lnty off icials who <br />were knowledgeable about the study area and i.ts history were also <br />contacted. Initial contacts with the State :1istoric Preservation <br />Officer and with the U.S. Fish and Wildlife~ervice (FWS) have <br />alHo been helpful. The State of Colorado Water Conservation <br />Board has also taken an interest in this study. Several local <br />reHidents were also interviewed. <br /> <br />5. Previous Studies and Flood Control Improvements. Emergency <br />flood protection measures by local interests and gradual filling <br />of the left overbank on Henson Creek over ma:riy years have kept <br />flood damages from occurring. The left bank of Henson Creek <br />through the study reach is on a curve to the right; hence, flow <br />tends to erode it. A spoil levee exists fro:1\ Highway 149 to a <br />po:.nt about 300 feet upstream on the north (rright) side of Henson <br />CrE!ek. <br /> <br />The south (left) bank and portions of t:1e overbank consist <br />of broken rock fragments in a sand matrix. 'the filling of the <br />oVE!rbank has been augmented with placement ae some boulder size <br />rock on the face of the riverbank. Same port:ions of the bank <br />upHtream of the immediate study reach are ca::l'Iposed of placed <br /> <br />2 <br />
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