Laserfiche WebLink
<br />e <br /> <br />DAM EMBANKMENT <br /> <br />Plans and specifications must be prepared and approved by the State <br />Engineer prior to beginning construction. Soils tests and material <br />evaluations will be required to prepare the plans and <br />specifications. The reconnaissance designs described herein are <br />based upon a site inspection and review of available data; more <br />detailed engineering work may result in a different design. <br /> <br />The dam, is an intermediate Class II structure. The "Rules and <br />Regulations for Dam Safety and Dam Construction" prepared by the <br />Colorado State Engineer, Division of Water Resources state the <br />following criteria should be met: <br /> <br />* a minimum of 5 feet of freeboard, <br />* an outlet pipe capable of draining the top 5 feet of storage <br />in 5 days, <br />* a crest width equal to the vertical height divided by 5 plus <br />10 feet, 25 feet maximum, <br />* a spillway capable of passing a 50% PMP, <br />* upstream rip rap to protect the embankment, <br />* and soils investigation and analysis. <br /> <br />e <br /> <br />EMBANKMENT: The existing dam is an earth embankment with the <br />following dimensions: <br /> <br />* 42 feet high, <br />* crest length of about 4,410 feet, <br />* crest width of 17 feet, <br />* 2.0H:1.0v upstream and 2.0H:1.0v downstream slopes <br />* 34 inch diameter outlet pipe, <br />* concrete upstream face. <br /> <br />The enlarged dam will be an earth embankment with following the <br />dimensions: <br /> <br />* 50 feet high, <br />* crest length of about 5,140 feet, <br />* crest width of 21 feet, <br />* 3.5H:1.0V upstream and 2.0H:1.0V downstream slopes <br />* 34 inch diameter outlet pipe, <br />* spillway width approximately 150 feet, 7000 cfs capacity, <br />* Rip rap upstream face. <br /> <br />Figure 4 shows the cross section of the dam at the outlet pipe <br />superimposed over the existing embankment. <br /> <br />prospect Dam <br /> <br />6 <br />