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MEMORANDUM

TO: MONTEVALLO WATER & SEWER BOARD

FROM: BRYAN PATE

SUBJECT: MONTEVALLO WWTP CAPACITY

DATE: 10/5/2006

CC: MONTEVALLO CITY COUNCIL, MONTEVALLO PLANNING & ZONING

In conjunction with Mrs. Woodham, we have recalculated and reevaluated the available

capacity of the existing Montevallo Wastewater Treatment Plant. This is an annual

follow up to the evaluation which was prepared in August, 2005. Upon a more in-depth

review of the data, it appears that InSite used lower flowrates for new construction than

the actual historical data at the wastewater treatment plant supports. InSite’s

calculations in August, 2005 were based on 152.5 gallons per day actual water use per

household by the customers of the Board. The actual historical data from the

wastewater treatment plant indicates an actual contribution to the sewer system of

approximately 360 gallons per day per household including infiltration and inflow.

Based on our revised calculations, the system can handle approximately 600 additional

homes at this time. Growth from 2004 to 2005 was approximately 5%, so the projections

include a conservative 7% growth rate in customer base. These projections indicate that

the treatment plant will be at 90% of its permitted capacity in 2009 to 2010.

Copies of the revised calculations as well as a list of currently approved subdivisions are

attached for your reference.