Laserfiche WebLink
Long Hollow Reservoir <br />Feasibility Study <br />TABLE 3.4.4-2 <br />Runoff Volumes by Hour <br />Hour after storm onset) Runoff AF Percent of Total <br />0 0 0 <br />2 2.5 0.02 <br />4 477 3.8 <br />6 5,510 44.2 <br />8 9,632 77.2 <br />10 11, 399 ~ 91:3 <br />12 12, 303 98.6 <br />14 12,469 99.9 <br />16 12,480 100.0 <br />3.5 Outlet Operating Criteria <br />The outlet works for the LHR must be designed to meet the following operating criteria: <br />• The SEO's regulations (Department of Natural Resources 1988) sfate that "The outlets <br />for Class I dams shall be capable of releasing the top 5 feet of reservoir capacity in 5 <br />days. .. In addition, outlets shall be capable of passing inflow to the reservoir with a <br />minimum of 10 feet of head in order to meet the demands of downstream water rights and <br />the owners' release requirements." <br />• The outlet works must provide a low-flow demand of about 2.5 cfs and be capable of <br />releasing 100 cfs from the reservoir at most water surface elevations. <br />3.6 Engineering Geology <br />The LPWCD contracted with Hepworth-Pawlak Geotechnical, Inc. (H-P) to perform a feasibility- <br />level engineering geology evaluation of the LHR site to evaluate geologic conditions that could <br />have a major impact on project feasibility and to provide a basis for future design-level studies. <br />After visiting the LHR site in January 2003, H-P prepared a report based on field observations, <br />interpretation of aerial photographs, and H-P's experience with similar projects. The H-P report <br />991-077.120 Wright Water Engineers, Inc. Page 21 <br />April 2005 <br />