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Collection System Collaborative Benchmarking Group
<br />Best Practices for Sanitary Sewer Overflow (SSO) Prevention and
<br />Response Plan
<br />TABLE 'B'
<br />rs&ZIWTrTv7r5Tm;S'• • . • • u . • u•
<br />PXINd'7AIT, I
<br />Water
<br />Height above
<br />M/H frame
<br />H in inches
<br />S S O FLOW
<br />Q
<br />Min. Sewer
<br />size in which
<br />these flows
<br />1/8
<br />28
<br />0.04
<br />1/4
<br />62
<br />0.09
<br />3/8
<br />111
<br />0.16
<br />1/2
<br />160
<br />0.23
<br />5/8
<br />215
<br />0.31
<br />6"
<br />3/4
<br />354
<br />0.51
<br />8"
<br />7/8
<br />569
<br />0.82
<br />101.
<br />1
<br />799
<br />1.15
<br />12"
<br />1 1/8
<br />1,035
<br />1.49
<br />1 1/4
<br />1,340
<br />1.93
<br />15"
<br />13/8
<br />1,660
<br />2.39
<br />11/2
<br />1,986
<br />2.86
<br />15/8
<br />2,396
<br />3.45
<br />18"
<br />13/4
<br />2,799
<br />4.03
<br />17/8
<br />3,132
<br />4.51
<br />2
<br />3,444
<br />4.96
<br />21"
<br />21/8
<br />3,750
<br />5.4
<br />21/4
<br />3,986
<br />5.74
<br />23/8
<br />4,215
<br />6.07
<br />21/2
<br />4,437
<br />6.39
<br />2 5/8
<br />4,569
<br />6.58
<br />24"
<br />2 3/4
<br />4,687
<br />6.75
<br />2 7/8
<br />4,799
<br />6.91
<br />3
<br />1 4,910
<br />1 7.07
<br />KUM 907A IT, I �
<br />Water
<br />Height above
<br />M/H frame
<br />H in inches
<br />S SO FLOW
<br />Q
<br />Min. Sewer
<br />size in which
<br />these flows
<br />1/8
<br />49
<br />0.07
<br />1/4
<br />111
<br />0.16
<br />3/8
<br />187
<br />0.27
<br />6"
<br />1/2
<br />271
<br />0.39
<br />5/8
<br />361
<br />0.52
<br />8"
<br />3/4
<br />458
<br />0.66
<br />7/8
<br />556
<br />0.8
<br />10..
<br />1
<br />660
<br />0.95
<br />12"
<br />1 1/8
<br />1,035
<br />1.49
<br />11/4
<br />1,486
<br />2.14
<br />15"
<br />1 3/8
<br />1,951
<br />2.81
<br />11/2
<br />2,424
<br />3.49
<br />18"
<br />15/8
<br />2,903
<br />4.18
<br />13/4
<br />3,382
<br />4.87
<br />17/8
<br />3,917
<br />5.64
<br />21"
<br />2
<br />4,458
<br />6.42
<br />21/8
<br />5,000
<br />7.2
<br />24"
<br />21/4
<br />5,556
<br />8
<br />23/8
<br />6,118
<br />8.81
<br />21/2
<br />6,764
<br />9.74
<br />2 5/8
<br />7,403
<br />10.66
<br />2 3/4
<br />7,972
<br />11.48
<br />30"
<br />2 7/8
<br />8,521
<br />12.27
<br />3
<br />9,062
<br />13.05
<br />31/8
<br />9,604
<br />13.83
<br />31/4
<br />10,139
<br />14.6
<br />33/8
<br />10,625
<br />15.3
<br />36"
<br />3 1/2
<br />11,097
<br />15.98
<br />3 5/8
<br />11,569
<br />16.66
<br />3 3/4
<br />12,035
<br />17.33
<br />3 7/8
<br />12,486
<br />17.98
<br />4
<br />12,861
<br />18.52
<br />4 1 /8
<br />13,076
<br />18.83
<br />4 1 /4
<br />13,285
<br />19.13
<br />4 3/8
<br />13,486
<br />19.42
<br />Disclaimer:
<br />This sanitary sewer overflow table was developed by Ed Euyen, Civil Engineer,
<br />P.E. No. 33955, California, for County Sanitation District 1. This table is provided
<br />as an example. Other Agencies may want to develop their own estimating
<br />tables.
<br />19F-95
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