The sewer treatment plant and sewer
collection system operation & maintenance is contracted to Operations
Management International, Inc. (OMI). OMI employs 25 people at its Key
West facility, which functions much like a City department. Wastewater is
treated and pumped out into the ocean through an outfall dating back to
1954. The treatment plant was constructed in 1989 and was designed and
permitted to process sewage at a rate of 10 million gallons per day (MGD).
Currently, average flows are approximately 4 MGD, a reduction from 8 MGD
two years ago. This reduction in flow indicates the success of the $56
million collection system rehabilitation. Seawater inflow that previously
entered the system and had to be unnecessarily pumped to the plant no
The City has spent more than $67 million over the past 3 years on sewer
capital improvements to rebuild the collection system, replace the ocean
outfall with a Class I Deep Injection Well, and upgrade the current Sewer
Treatment Plant to an Advanced Wastewater Treatment (AWT) facility.
Accomplishments for Wastewater:
- Completed upgrade of the facility to AWT
capability one month early eliminating discharge to the ocean,
rerouting treated effluent to a new Class I deep injection well, and
improving near shore water quality. Ocean outfall will now be used as
an emergency backup only and is scheduled to be permanently
decommissioned by 2006.
- AWT and deep injection well was
substantially complete, permitted, and operationally tested in
September 2001. The facility ribbon cutting and dedication ceremony
was held the fourth week of September.
- Completed several plant
repair/maintenance projects i.e. replaced major clarifier gear drive,
installed disc-flow type pumps to replace old-style progressing cavity
scum recycle pumps. Saved the City over $90,000 by utilizing OMI staff
and completing these tasks "in-house".
- Installed a separate power source at
pump station "D allowing all three pumps to be in operation
simultaneously, if necessary. Will allow increase in total flow during
emergency high flow periods by 1.4 million gallons per day (MGD).
- Installed a conveyor belt weight scale
to maximize total tons of solids hauled away from the plant.
- Replaced antiquated emergency equipment
and backup power battery banks ensuring proper operation of equipment
and uninterrupted service especially during an emergency.
- Near shore water pollution, resulting in
public health concerns and beach closures, created a need for
expedited sewer collection system design. Utilities designed 18% of
sewer collection system "in-house" expediting design phase
from nine to three months. In addition, "in-house" design
saved the City over $300,000.
- The 7-year capital plan for the Sewer
Rehabilitation Project was accelerated and estimated to be complete in
3 years. The project was substantially completed in 2 ½ years, 6
months ahead of the accelerated schedule. Early completion minimized
impact of construction on Key West residents.
- Completed sewer work in District
"C" on January 26, 2001.
- Completed sewer work in District
"DA" on February 27, 2001.
- Completed sewer work in Districts
"F & G" on July 30, 2001.
- Sewer work at Pump Station "A"
began July 2001 and is scheduled for completion by the end of FY 2001.
- Handled 85% of Sewer Construction
complaints within 48 hours of receipt. An average of ten complaints
per month were received and addressed.
- Provided weekly status updates on
construction projects to the public through newspaper ads, outreach
meetings, and door-to-door canvassing.
- Since 1998, the City of Key West has
replaced 241,595 feet or 46 miles of mainline sewer pipe, 147,158 feet
or 28 miles of service laterals, 13,329 or 2.5 miles of sewer force
- Completed Phase-I of lateral testing.
100% of laterals have been tested (14,198 laterals) for leaks. 6,276
laterals failed initial tests, a failure rate of 44%. Since initial
testing, 5,039 or 80% of leaking laterals have been replaced or
repaired and have come into compliance with the City's Ordinances.
- The City continues to test and retest
private property sewer laterals to ensure continual improvement of
water quality in Key West's near shore waters.
- Implemented a Mainline/Manhole testing
program established to identify any possible failures in new and
pre-existing mainlines. The program began in June 2001 and is
scheduled for completion in June 2002.
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