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FLOOD05534
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Last modified
1/25/2010 6:49:30 PM
Creation date
10/5/2006 1:37:48 AM
Metadata
Fields
Template:
Floodplain Documents
County
Boulder
Community
Longmont
Stream Name
Longmont area basins
Basin
South Platte
Title
Urban Stormwater Management Master Plan
Date
12/5/1995
Prepared For
Longmont
Prepared By
WRC Engineering, Inc.
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br />9. Dll.YCREEKNo. I BAS!I< <br /> <br />Ill. HYDRAULIC STRU<.,"UIU: L'''<V~~''(roR't" <br /> <br />The Dry Creek No.1 Basin lics jUSll0 the south of Ihe Lykins Gulch Basin and enlers tile MSA SOUlh <br />of Nelson Road (~ec Drawings 2 and 4). Several reservoirs e~isl in the off-sile area of this basin. the <br />mosl nomble of which are Ihe Clover Bas;n. Lefl Hand and Lagerman Reservairs. Within llie MSA. <br />Dry Creek No. I suh-ba~ins drain to Ihe Sl, Yrain Creek through either the Pratt Parkway oulfall or <br />lhehisloric Dry Crcek No. I conOucncejust easl of Main Slreet, <br /> <br />The hydraulic SlmeNre inventory program was performed 10 idenl;fy and obrain general hydraulic <br />informarion and phOlographs of all majO! slruclures along tlie majordrainagcways thaI pass thl"t)llgh llie <br />City. TIte purpose of obtaining Ihis informalion was 10 provide a comprehen.ive deskt(>p refercn<;e 10 <br />a'lisl in major droinageway managemenl. The rcsource will he u,'.eful in developing overview. af <br />Stmeture localions and conditions to facililate bolh the mainlenance of eXlSlmg Slro<:turcs and ,lie <br />coordin:ltionandde,ignofpropo>Cddninageway;mprovcmenL'. <br /> <br />10. LEFT HANT) CREEK BASIN <br /> <br />A relatively small are. at the southcrn edge of the MSA has been dc!ignatcd the Left Hand Creek <br />Basin (ree Drawings 2 and 4). MO<t of the sub-ha!in! in Ihis area drain directly to Left Hand Creek, <br /> <br />The drainagcways inventoried included Sprmg Gulch. Oligarchy D,rch. SI, Vrain Creck. Dry Clttk No. I <br />and Left Hand Creek. The inventory was performed by walking along the drainag.way alignments and <br />performing field observations. Gen.ral dimensional dara for thc various struclures w.re recorded on data <br />"hect, and photograph! oflh. !truCtllTCSWCTC ~xen, <br /> <br />II. DRY CREEK BASIN <br /> <br />r <br />( <br /> <br />The fringe. of the Dry Clttk watershed overlap the MSA in two small area' at the !outhern boundary <br />of the MSA and One area DCar Ihe dowl\Slle3mlimit of Ihc LPA (see Drawing, 2 and 4). These area, <br />draind;rectlyaway from the s(udyarca to DryClttx. <br /> <br />The types of mUClures CnC<lUOlCre<l inc1udedculvens. channel,. bridges, stonn ""wer outfall" irrigation <br />diversions. delCntion ponds and olhcr !lruCtures. ^ total of 215 struCtures Were inventoried. The <br />majorit)' of the structures werc locared along Spring Gulch and Oligarch}' Ditch, Data ohtained through <br />the inventory. ;n<;luding dam sliec1s and cot,,, photographs. are presented in two ,"olume, entitled Drainage <br />Structurclm'entory, <br /> <br />I <br />, <br /> <br />12, EAsrSr. VRJ\tN BASIN <br /> <br />l'hearcaju..'tnorthofSI, Vrain Creek at the east edge of the study area comprises thc EaslSI. Vrain <br />Ba,in (see Draw;ng 4). One primary d,ainage system was idc11lified as drain,ng most of tllc sub.hasins <br />in this arca, while the remaining sub-ba,im drain directly ill 51. Vrain Crc<:k. <br /> <br />" <br /> <br />" <br />
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