HomeMy WebLinkAbout[09] Public Works Director - Wastewater Plan RehabCITY OF tiT. J[1SEPH
Council Agenda Item 9
MEETING DATE: February 19, 2009
AGENDA ITEM: Public Works Director -Wastewater Plan Rehab
SUBMITTED BY: Public Works Director
BOARD/COMMISSIONjCOMMITTEE RECOMMENDATION:
PREVIOUS COUNCIL ACTION:
BACKGROUND INFORMATION:
Main lift station rehabilitation
The main lift station at 413 2"d St NW is over 20 years old. The current equipment has had minor
maintenance to keep the plant operational. According to the CIP the lift station was to be replaced with
a new station on the same site at a cost of $1,500,000.00 in 2009. Staff has reevaluated the current and
future needs of the City and has the following recommendations.
Re-use the existing structure -S.E.H. reviewed the structure and found it to be structurally sound.
Replace bearings and seals on the existing pumps -the existing bearings and seals have never been
replaced. This has been recommended by the Smith & Loveless area service representatives.
Replace controls for the lift station pumps to include VFD's and transducer level indicator.
Replace the generator and switch gear-The current generator is failing as will be explained. In the past
this generator has been exposed to chlorine gas which corrodes metal at a high rate.
Insulate the structure, ceiling and exterior walls -Currently there is no insulation in the walls and the
ceiling insulation is minimal.
Replace doors and windows with energy efficient replacements
Replace furnace with modifications to the duct system
Sequence and cost of repairs and replacements
The generator and switch gear needs to be replaced. The voltage regulator has failed on the generator;
the cost for repair is $3,319.63. This cost would be best used in the purchase of the replacement
generator and switch gear at a cost of $28,400.00. Trade in value for the old generator is $3,000.00. This
new external generator would require a concrete pad to be laid with conduit extended to the building
and wired to the existing electrical system. I estimate $2,500.00 for the required concrete pad and
$8220.00 for electrical work. This totals $30,400.00 with the trade in of the existing generator. There
would be a $3,319.63 repair expense not paid if the council chooses to replace the current generator
now. The estimated total expenditure would be $35,837.37 if the repair is bypassed. This would need to
be in place before the storm season in spring.
The current pump seals and bearings should be replaced. This was recommended by the pump
representatives who evaluated the motors and pumps on site for the City. I agree with their
assessments. This would cost $1,500.00 per pump for a total of $4,500.00. The shafts would bean
additional cost if required. They would be evaluated at the time of disassembly.
The building which was constructed in 1960 has been evaluated by S.E.H. to verify its integrity. It has
been found to be structurally sound. The building is not insulated in the block walls and has minimal
insulation in the ceiling. It is stafYs recommendation to spray the ceiling with foam insulation for a cost
of $2,000.00. With spraying the ceiling there needs to be a fire barrier which can be achieved with a one
hour ceiling the for $1,450.00. The walls would be insulated on the outside with a steel siding placed
over the insulation. The windows and door would be replaced with insulated replacements. Currently
the windows and doors are single pane and un-insulated. The total cost for this would be $14,276.00
The controls of the lift station are aging to the point repair parts will be difficult to acquire. Staff
proposes to replace the controls with controls which incorporate variable frequency drives which will
reduce electrical consumption of the lift station. The cost for replacing the controls is estimated
at$28,298.00 for the cabinet with controls. It is estimated $5,000.00 for electrician work to install.
Estimated total price is $33,298.00
The heating in the building has been running continuously for years in the winter months. This is due to
the un-insulated building, windows and doors. This furnace is over 20years old and has reached its life
expectancy. The cost to replace the furnace and redirect the heat to more efficient locations in the
building is $4,550.00
Conclusion; The total for the above items is $92,461.37 Staff would like to have a 10% contingency
included for unforeseen items or services required to complete the project. Staff would like the City
Councils decision on how to proceed with the repairs to the lift station. The generator replacement
would be the first step as there is a repair required immediately. Please let me know so staff knows how
to proceed with this lift station.
BUDGET/FISCAL IMPACT: $ 92,461.37
ATTACHMENTS: More information will be forwarded
REQUESTED COUNCIL ACTION: Determination on how to proceed