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Last modified
1/25/2010 6:48:01 PM
Creation date
10/5/2006 1:12:18 AM
Metadata
Fields
Template:
Floodplain Documents
County
Weld
Community
Nunn
Stream Name
Spring Creek
Basin
South Platte
Title
Hydrology Investigation for the Spring Creek Watershed
Date
5/1/1990
Prepared For
Nunn
Prepared By
USDA Soil Conservation Service
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br />traffic was being turned back at Ault as <br />we II as on the no:o,-th side. T,-aff i c was n i <br />as the reporter visited the area. <br /> <br />Barro:ow pits on both sides of the highway <br />were ful I of rushing water... <br /> <br />GREELEY TRIBUNE 8-10-87 <br /> <br />...NUNN - To:orrential rains flooded streets <br />and several basements Sunday evening set <br />knee-deep water rol I ing down to nearby <br />Pi e,-ce. <br /> <br />The st(,,-m sta,-ted a,-ound 6:30 p.m. a little <br />51)uth (If Pi et-ce and Nunn, then sta II ed over- <br />the two northern Weld County towns, <br />app,-oximately 20 mi les no:o,-th of Greely. <br />Jim Wirshborn of Mountain States Weather <br />Set-vice said tht-ee inches of rain fell in <br />two hour-s. <br /> <br />Mode I i fig F'r-,)deedur-e <br /> <br />The intent of this study is to determine peak discharge - <br />frequency values and the impacts of potential flood control <br />measures for the towns of Nunn and Pierce. <br /> <br />There are no streamflow records for Sprins Creek. Flood <br />Insurance Studies were made in 1979 for the town of Pierce <br />and in 1978 for Nunn. The SCS TR-20 Model was used for the <br />hydrology in these studies. To be consistent, the TR-20 <br />Model was used herein also. <br /> <br />We do not have deta i led hyd,-o I ('g i c data used in the F I (,od <br />Insurance Studies, however a comparison of the 100 year <br />frequency discharge for Spring Creek at Pierce shows values <br />for this study are about 77% of those given in the Flood <br />Insu,-ance Study. Values he,-ein compare quite well with data <br />developed by the SCS for the Lone Tree Creek Study done in <br />1987. <br /> <br />Hydt-ol('gic Data <br /> <br />Hydrologic data such as CNs, Time of Concentration, <br />P,-ecipitation, TR-20 listing, Dams2 listing, etc at-e in the <br />Soi I Conse,-vation Se,-vice fi les and also included in an <br />attached appendix. <br /> <br />A basic difference in this current study compared to the <br />Flood Insurance Studies is the assumptions of land treatment <br />
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