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Item 6.a.6)
Wet Weather Operations
Report
Margaret P. Orr, P.E.
Ba T. Than, P.E.
April 7, 2011
Central Contra Costa Sanitary District
2010 - 2011 Winter
• Wet start, dry middle, wet in February-March
• Rainfall to date is 100% to 123% of "normal'
(July 2010 to March 2011)
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Collection System Operations
• No capacity - related overflows
• Pumping stations operated well
• Storm Damage /Landslides
• 1003 Carol Lane, LAF
• 3278 Isola Lane, LAF
• 158 La Espiral, OR
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Treatment Plant Operations Flows
Month
Average
MGD
Peak
MGD
Stored
MGD
November
46.1
73.3
0.5
December
44.1
105.4
9.7
January
43.3
73.4
5.4
February
49.7
132.2
37.6
March
64.2
156.1
123.7
QUESTIONS?
11