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<br />TABLE 2-2
<br />
<br />RIPRAP GRADATION REQUIREMENTS
<br />
<br />NOMINAL PERCENTAGE OF ROCK FRAGMENTS OF VARIOUS WEIGHTS' (POUNDS)
<br />THICKNESS NOMINAL 40 TO 50 50 TO 60 o TO 10
<br />OF RIPRAP 'lAXlMUM PERCWT PERCENT PERCENT
<br />INCHES SIZE3 GREATER THAN FROM TO LESS THAN
<br />24 l,250 625 50 625 50
<br />36 1,,500 2,250 100 2,250 Ion
<br />
<br />Sand and rock dust is less than 5 percent, by weight, of the
<br />total riprap msterial.
<br />
<br />2
<br />
<br />The percentalle of this-aize material does not exceed an amount
<br />which will fill the voids in the larp;e rock.
<br />
<br />3
<br />
<br />Rock fragments larp;er than the nominal size were permit ted,
<br />provided that no larp;e unfilled void spaces were left adjscent
<br />to or surrounding the oversize rock.
<br />
<br />b. Concrete Dam. Approximately 530,000 cubic yards of
<br />concrete wss used in the construction of the concrete massive head-
<br />buttress of the Pueblo Dam. The structure is 1,750 feet lonll and
<br />l38 feet wide at the base with 23 buttresses and is located between
<br />stations 5l+78 and 69+28. The top of the psrapet is lQl feet above
<br />the streambed at elevation 4925.0 feet ms!. The spillway and
<br />outlet works are located in this portion of the Pueblo Dam, see
<br />Plate 2-4.
<br />
<br />c. Spillwsy. The spillway is uncontrolled and i~
<br />located between stations 57+03 and 62+53. The spillwav ia an
<br />ogee weir with a lenllth of 550 feet and crest elevation of 48'l8.7
<br />feet, mill. The plan of the spillwav is shown on Plates 2-1 and
<br />2-4. The spillway ratinR curve is .hown on Plste 2-~.
<br />
<br />d. Outlet Works. The river, spillway, fish hatcherv,
<br />and south outlet works sre located in the concrete massive h<,ao-
<br />buttress, snd the Ilessemer Ditch outlet works is located in the
<br />right embsnkment. The following is a description of the outlet
<br />works;
<br />
<br />(1)
<br />consistin~ of one
<br />l6, which is over
<br />
<br />River Outlet Works. The river outlet works,
<br />gsted conduit, is located in hut tress numher
<br />the streambed. The length of the conduit is
<br />
<br />2-2
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