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4.20 CHAPTER FOUR

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FIGURE 4.14 Hydraulically balanced inlet cones.

pacity, and this should be factored into the hydraulic design. Design criteria applicable to
the design of intake conduits are presented in Table 4.7.
Subaqueous pipe is generally used for intake conduits, with pipe laid within a trench
in the lake or reservoir bottom. It is desirable to have approximately 3 to 4 ft (0.91 to
1.22 m) of cover over the top of the pipe, plus an additional protective top layer of crushed
rock.