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1N INCHES <br />180 <br />168 <br />156 <br />144 <br />132 <br />120 <br />108 <br />96 <br />84 <br />72 <br />60 <br />- 10,000 <br />8,000 <br />- 6,000 <br />- 5,000 <br />- 4,000 <br />3,000 <br />2,000 <br />1,000 <br />- 800 <br />- 600 <br />- 500 <br />- 400 <br />- 300 <br />to <br />u - 200 <br />54 O� <br />I / <br />1- <br />Cc 48 / W ~_ 100 <br />x 80 <br />Q - <br />u /2 ,( - 60 <br />O _N r 50 HW <br />c 0 40/7 --)SCALE <br />I- 36 0 (1) <br />W <br />EXAMPLE <br />D•42 Inches (3.5 feet) <br />Q•120 cls <br />' MW <br />0 feel <br />(1) 2.5 8.8 <br />(2) 2.1 7.4 <br />(3) • 2.2 7.7 <br />ID la feel <br />/� �>- 2. <br />t.1', -- <br />u),...-- 1.5 <br />3 <br />/I- 1.5 <br />Q: <br />.- <br />F'5 <br />1- .. <br />o. <br />W - 1.0 <br />0 <br />(1) (2) (3) <br />- 6. <br />- 6. <br />6. <br />-5. <br />- 5. <br />- 4. <br />R+C4. <br />- 3. <br />- 5. <br />-3. <br />3. <br />77 - <br />�� `_ r 2. <br />4 33 <br />0 <br />30 <br />27 <br />24 <br />18 <br />15 <br />l <br />12 <br />- 20 <br />-10 <br />-8 <br />ENTRANCE <br />TYPE <br />-1.0 <br />Square edge with' 3 - .9 <br />headwall 0 <br />(2) Greer' sad ■ith <br />headwall <br />(3) <br />Groom end <br />projecting <br />6 To use scale (2) or (3) Project <br />- 5 horizontally 1a stele (1),Ihen <br />- 4 use straight Iaclin'd line through <br />D and Q scales, or reverse as <br />:'3 illustrated. <br />- 2 <br />- 1.0 <br />JREAU . F ?LAC ROADS JAN. 1963 <br />4 <br />W <br />-.8 <br />-.7 <br />- .6 <br />- .9 <br />-.8 <br />- 7 <br />14 <br />n� <br />r, <br />- .7 <br />- .6 .6 <br />- .5 <br />5 .5 <br />HEADWATER DEPTH FOR <br />CONCRETE PIPE CULVERTS <br />WITH INLET CONTROL <br />CHART 3 <br />27 <br />io ( <br />