Laserfiche WebLink
<br />"" <br /> <br />(' n {f ,- <br />, v .ll,...' <br /> <br />c. Right Abutment - No Cutoff Reach. <br />4. Ground Water and Seepage AnalysIs. <br />5. Construction Materials. <br />6. Emb..'Ulk.ment Design. <br />a. Left Abutment and Riverbed. <br />b. Right Abutment - Slurry Trench Reach. <br />c. Right Abutment - No Cutoff Reach. <br />d. Right Abutment - Supplementary Dike. <br /> <br />The following discussion is intended to summarIze our views on the foregolD.g <br /> <br />items: <br /> <br />1. Hydrolo9;"V. The drainage area tributary to the Narrows site totals <br />13,270 sq. mt. It is complex and incorporates weather conditions of great e.memes, <br />from the alpine region of the high Rocky Mount:lins to the semi-arid region of the Great <br />Plains. The average annual runoff at the site is only 422.000 aI.. but it varles widely <br />from a minimum of 116,000 af to a maximum. of 1,355,000 ai. <br />These quantities are of particular significance in comparison with storage space <br />to be provided by the reservoir. Briefly, that space may be summarized as follows: <br />llim <br />Conservation Pool <br /> <br />Joint Use, Flood Control and <br />Conserv. <br /> <br />Elev..ft. Volume. aI. <br /> 373,000 <br />4399,0 <br /> 75,000 <br />4404,3 <br /> 475,000 <br />4428,5 <br /> 636,000 <br /> <br />Flood Control Space <br /> <br />Super Flood Space <br /> <br />4448,5 <br /> <br />Accordingly. it is shown that for an average rlDloff year, even assuming zero <br />releases through the dam, the complete l'UD.off of the river could be stored well below <br />the top of the normal Flood Control Space, Elev. 4428.5. The )X>ssible significance of <br />thIs condition i.o. rela.tion to seepage under the long reach of the dam on the right abut- <br />ment will be considered under a subsequent section. <br />Hydrologic records show that the South Platte River experiences large flood <br /> <br />8, <br />