Thank you very much for agreeing to look into the very turbid quarry-colored
water that has been following the recent rain showers.
As you mentioned the contractors are pumping again today as they have been
doing throughout the rainy season.
For the sake of interested people with little engineering experience I
wanted to put the pumping in a bit of perspective:
They are pumping at 350 cfm. For the layman that means little but it
translates to:2618 gallons every minute or:
There are two systems coming off the quarry: 1) Sub drain water that flows
directly from storm drains into Chimes Creek and 2) Surface run off that is
detained in the pond, filtered then pumped into storm drains to Chimes
In a rain storm the subdrains alone now seem to give off as much or even
more water than the total run off before construction since this system now
has the Ridgemont drainage tied directly in to it.
It would seem that the water detained in the pond is water in excess of
pre-construction run off.
Therefore this project during construction is adding over 1.25 million
gallons of water EVERY DAY into Chimes Creek when pumping occurs which has
been pretty much daily throughout the rainy season (This also assumes that
there is no pumping at night).
This begins to explain the increased erosion that we have seen this year
along our properties.