Laserfiche WebLink
<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />B. Hydrological Design Criteria <br /> <br />1. Colorado State Criteria <br /> <br />The criteria used to design dams and spillways in Colorado is <br />defi ned by the State Engi neer' s Offi ce, pu rsuant to Chapter 148-5-5, <br />et. seq. of the 1963 Colorado Revised Statutes. The criteria <br />consists, in part, of the definition of the "hazard rating" of the dam <br />for embankment design. The hazard rating criteria, as currently used <br />by the Colorado State Engineer's Office, is sumarized as follows: <br /> <br />a. Low Hazard - applies in undeveloped areas where failure would <br />result only in loss of structure, with little additional property loss <br />below the dam. The design floods are much less than maximum probable <br />as that obtai ned by assumpt ion "B" (Reference 1). Genera lly, the <br />inflow design flood has a 100 year frequency of occurrence. <br /> <br />b. Moderate Hazard - applies to structures built in areas where <br />failure would result in great property damage, but loss of life is not <br />envisioned. A moderate hazard inflow design flood is that obtained by <br />assumption "A" (Reference 1). <br /> <br />c. High Hazard - applies to structures where failure would <br />likely result in loss of life. The inflow design flood for a high <br />hazard structure would be the maximum probable flood (Reference 1). <br /> <br />For spillway design, the classification is either high or low, or <br />somewhere in between, with the in between to be justified by a dam <br />breach analysis. <br /> <br />- V-2 - <br />