1987-12-01_PERMIT FILE - C1981017 ‎(112)‎

• Permit No: C1981017
• IBM Index Class Name: PERMIT FILE
• Doc Date: 12/1/1987
• Doc Name: David E Fleming Company Preparation Plant Area Surface Drainage Plan
• Section_Exhibit Name: Chapter II Attachment 3 to Appendix II-B-7
• Media Type: D
• Archive: No

TABLE II-B-App 7-Att 3-2
COMPUTATION OF PEAK DISCHARGES FOR PREPARATION PLANT AREA
Rainfall Intensity; Peak Discharge
Drainage Time of - r :)- r r -Yr
Sub-basin Area Concentration "C" Storm Storm Storm Storm
Number (Acres) (Min.) Value (In/Hr) (In/Hr) (In/Hr) (In/Hr)
(1) (2) (3) (4) (5) (6) (7) (8)
i 2.00 15 .65 1.12 1.88 1.46 2.44
2 2.25 15 .66 1.12 1.88 1.66 2.79
3 10.54 15 .62 1.12 1.88 7.32 12.28
3A 7.51 15 .25 1.12 1.88 2.10 3.53
4 10.75 15 .25 1.12 1.88 3.01 5.05
5 10.95 15 .25 1.12 1.88 3.07 5.14
6 2.07 15 .25 1.12 1.88 0.58 0.97
7 1.93 15 .25 1.12 1.88 0.54 0.91
Explanation of Columns:
(2) , (3) -- From Table 3
(4) -- Selected value, see text for discussion
(5) , (6) -- From Figure 2; values for 15 minutes duration x 4
(7) -- Col. (2) x Col. (4) x Col. (5)
(8) -- Col. (2) x Col. (4) x Col. (6)
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