HomeMy WebLinkAboutPresentation (3) 46th Street Lift Station46TH STREET LIFT STATION
Donnie Stanton
Acting Director of Utilities
WHAT HAPPENED
On July 28th a portion of the force main
burst inside the dry pit of the 46th
Street Lift Station
This lift station services the area
from Hwy 73 to FM 365, between
Twin City Hwy and Hwy 69.
All electrical and controls were
submerged
All dry pit motors were submerged
Sewer was overflowing from the
station and discharging into DD7
outfall
EMERGENCY AUTHORIZATION
Emergency authorization for assessment,
bypass pumping, and repair of failed pipe
inside the lift station was given by City
Manager due to potential threat to public
health and safety
Competitive pricing was sought on this
initial phase between Allco and Brystar.
Allco had the best price.
Initial estimate of repairs and bypass
pumping was $300,000, based on known
conditions at the time.
TCEQ
TCEQ was notified of the
conditions immediately
Proper notification was made to
the Public as required by TCEQ
Health danger was mitigated with
assistance of DD7; they built an
earthen dam in the outfall ditch.
This allowed the wastewater to be
impounded so chlorination could
occur (detention time reduced
odor and potential health hazard).
PLANS VS. REALITY
Conditions of pipe were much worse
than estimated. Allco had to tie the
bypass in to the first good section of
pipe, 200’ away. The ductile iron pipe
was corroded around the lift station
and had to be replaced. The affected
sections inside the lift station, and also
the section penetrating through the
wall, had to be replaced.
PRESENT ESTIMATE OF REPAIRS
Rotten pipe (inside lift station and 200’
of force main)
Pumps (bearings replaced)
Motors (cleaned, re-wired, new
bearings)
Bypass pumping longer than planned
Controls being renewed, wiring
changed
Present estimate for total repairs may
approach $900,000
THE BRIGHT SIDE
Renewed piping where pipe was failing.
Renewed controls
Renewed Pumps
Renewed Motors
Emergency bypass apparatus built,
available for use in the event of any
other emergency, including hurricanes.
The 2021 Capital Plan Identified $1M
towards 46th Street Lift Station Force
Main repairs.
QUESTIONS?