5803_ROSCANS_2008

Leachate Pond Calcnlations
On 17 March, 2008 calculations were made concerning the water accumulation and
quantities when rainfall occurs.
Using the CHS system on the Madison County we site, areas were calculated for the
leachate pond here at the Landfill on Craig Rudisill Road in Marshall. The following was
determined:
1. Area of the pond that is subject to rainfall and therefore will accumulate rain into
-the pond is 17,250 ft2. If one multiplies this by 144 in2 per ft2 you get 2,484,000 in2.
One inch (1") of rainfall would be 2,484,000 in' of water or 10,750 gallons of
water.
2. Area of the pond when at a normal level, that is approximately level with 1/3 the
way vertically up on the inlet pipe, is 10,425 ft2. Multiplying this by 144 in per ft2
you get 1,501,200 in'. One inch of water pumped out at this level equals to 6500
gallons of leachate.
3. When we pump leachate out into our irrigation system, the pump rate is 17 gpm
with eight (8) sprinkler heads running. This is measured using a 1 gallon bucket
and a stopwatch and measuring the rate of each sprinkler and summing the rates.
That equates to approximately 1000 gallons per hour.
This data was accumulated and calculated by James Huff, Director, Madison County Solid
Waste Department.