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Collection System Collaborative Benchmarking Group <br />Best Practices for Sanitary Sewer Overflow (SSO) Prevention and <br />Response Plan <br />TABLE 'C' <br />Height of <br />spout above <br />M/H cover <br />H in inchec <br />sso <br />FLOW <br />Q <br />1/8 <br />1.0 <br />1/4 <br />1.4 <br />3/8 <br />1.7 <br />1/2 <br />1.9 <br />5/8 <br />2.2 <br />3/4 <br />2.4 <br />7/8 <br />2.6 <br />1 <br />2.7 <br />1 1/8 <br />2.9 <br />1 1/4 <br />3.1 <br />1 3/8 <br />3.2 <br />1 1/2 <br />3.4 <br />1 5/8 <br />3.5 <br />1 3/4 <br />3.6 <br />1 7/8 <br />3.7 <br />2 <br />3.9 <br />2 1/8 <br />4.0 <br />21/4 <br />4.1 <br />2 3/8 <br />4.2 <br />2 1/2 <br />4.3 <br />2 5/8 <br />4.4 <br />2 3/4 <br />4.5 <br />2 7/8 <br />4.6 <br />3 <br />4.7 <br />3 1/8 <br />4.8 <br />31/4 <br />4.9 <br />3 3/8 <br />5.0 <br />31/2 <br />5.1 <br />3 5/8 <br />5.2 <br />3 3/4 <br />5.3 <br />3 7/8 <br />5.4 <br />4 <br />5.5 <br />4 1/8 <br />5.6 <br />4 1/4 <br />5.6 <br />4 3/8 <br />5.7 <br />4 1/2 <br />5.8 <br />4 5/8 <br />5.9 <br />4 3/4 <br />6.0 <br />4 7/8 <br />6.0 <br />5 <br />6.1 <br />Height of <br />spout above <br />M/H cover <br />N in inchec <br />sso <br />FLOW <br />Q <br />LOLLHIM <br />5 1/8 <br />6.2 <br />5 1/4 <br />6.3 <br />5 3/8 <br />6.3 <br />5 1/2 <br />6.4 <br />5 5/8 <br />6.5 <br />5 3/4 <br />6.6 <br />5 7/8 <br />6.6 <br />6 <br />6.7 <br />6 118 <br />6.8 <br />61/4 <br />6.8 <br />6 3/8 <br />6.9 <br />61/2 <br />7.0 <br />7.0 <br />6 518 <br />6 3/4 <br />7.1 <br />6 7/8 <br />7.2 <br />7 <br />7.2 <br />7 1/8 <br />7.3 <br />71/4 <br />7.4 <br />7 3/8 <br />7.4 <br />71/2 <br />7.5 <br />7 5/8 <br />7.6 <br />7 3/4 <br />7.6 <br />7 7/8 <br />7.7 <br />8 <br />7.7 <br />8 1/8 <br />7.8 <br />81/4 <br />7.9 <br />8 3/8 <br />7.9 <br />81/2 <br />8.0 <br />8 5/8 <br />8.0 <br />8 3/4 <br />8.1 <br />8 7/8 <br />8.1 <br />9 <br />8.2 <br />9 1/8 <br />8.3 <br />91/4 <br />8.3 <br />9 3/8 <br />8.4 <br />9 1/2 <br />8.4 <br />9 5/8 <br />8.5 <br />9 3/4 <br />8.5 <br />9 7/8 <br />8.6 <br />10 <br />8.7 <br />Unrestrained <br />M/H cover will <br />start to lift <br />Note: This chart is based on a 7/8 inch diameter pick hole <br />Disclaimer: This sanitary sewer overflow table was developed by Ed Euyen, Civil <br />Engineer, P.E. No. 33955, California, for County Sanitation District 1. This table <br />is provided as an example. Other Agencies may want to develop their own <br />estimating tables. <br />19F-97 <br />