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Waterfall Weir RatesText Box: Waterfall Weirs

 

Water depth on sharp weir

Water depth on natural stone weir

GPH per inch of weir

1/4”

1/8”

30

3/8”

1/4”

50

1/2”

5/16”

75

3/4”

7/16”

140

1”

5/8”

200

1-1/4”

3/4”

220

1-1/2”

1”

375

 

Minimum flow

Average flow

Maximum flow

1” requires 100 gph

1” requires 150 gph

1” requires 200 gph
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Last modified: Friday July 09, 2010.