In 2014 it was
determined by this observer that the city was losing an unaccounted
for 130 million gallons (MG) of treated water per year.
The city water
department blamed the loss on leaking old pipes, inaccurate meters
and other miscellaneous causes.
The department's
consultant, Aqua-line Leak Detection Services*
was paid an estimated
$12,000 to do a treated water leak analysis in March-April of 2015.
In
their final report dated 4/9/15 Aqua-Line made the
following assertions:
a. “Once leaks are
repaired, the city will be saving approximately $475 per day in water
production costs alone.” based on costs of $1.50 per thousand
gallons. “Savings will most likely be higher, as our water loss
estimates are somewhat conservative .”
b. Leakage summary
includes “discovered and repaired” supply side leaks totaling an
estimated 210, 000 gallons per day (GPD). Or, 6.3 MG per month.
c. Discovered but
not yet repaired leaks (as of 4/9/15) totaling 52,000 GPD or 1.565 MG
per month bringing the total discovered loss of 7.865 MG per month.
The repaired leaks
alone should have reduced the water loss by 75 MG per year which
represents a major portion of the previous years unexplained loss.
By comparing the
same months of pre-repair in 2014 with post repair months of 2015 we
should be able to notice the results.
April 2014 loss
47MG; 2015 loss 48MG
May 2014 loss 49 MG;
2015 loss 48MG
June 2014 loss 49MG;
2015 loss 48MG
It appears from this
small sample that instead of the expected savings of 7.9MG per month
(assuming all repairs have been made) the city is saving 1 MG per
month. At 1.50 per thousand gallons production cost the net cost of
the loss is an estimated $123,000 per year.
The water department
responded to questions concerning the discrepancies in the report by
the Mayor and Council's water committee chairman by repeating the
same answers from the year before and added the comment that the
consultant may have had overestimated the size of leaks.
*not accredited by
the Better Business Bureau
Paul Hunter
budhunter@frontier.com