Budget Message / Highlights - Metropolitan Water Reclamation ...

METROPOLITAN WATER RECLAMATION DISTRICT OF GREATER CHICAGO
2009 BUDGET
DESCRIPTION OF CAPITAL PROJECTS (continued)
03-122-3S
Upper Des Plaines Intercepting Sewers 12 & 13B Rehabilitation, SSA
Project consists of rehabilitating 3.5' diameter 3,700 foot long sewer and 6 manholes in Bryn Mayer
Avenue in the Village of Rosemont; and 27" diameter, 2,650 foot long sewer and 8 manholes in
Lawrence Avenue in the Village of Schiller Park.
03-296-3M
04-015-3V
Installation of Central Boiler Facility, Calumet WRP
A central boiler facility at Calumet WRP is required to satisfy the additional heating demands of new
infrastructure additions, i.e. influent pumping station, TARP valve chamber, grit dewatering facility,
primary settling tanks, and new laboratory building. Existing heating demands will also be handled
from the new central boiler facility.
New and planned process facilities at the Calumet WRP could require the plant to add and maintain
up to 16 boilers, located across the plant. Construction of a Central Boiler Facility will consolidate all
steam loads to 5 large boilers in one location. This will reduce labor costs by eliminating the need for
hiring an additional operating engineer, and eliminating the need for additional contracted
maintenance services. This results in an annual labor savings of $260,000.
Storage Building, NSWRP
A new storage building for items secured through the Procurement and Materials Management and
Maintenance and Operations Departments.
04-125-3S
Upper Des Plaines Pump Station Rehabilitation and TARP Connection, SSA
Structural/Architectural, Mechanical and Electrical Improvements to P.S. - New Pumps, Lighting,
HVAC and design of gated diversion structure. Structure to intercept flows during peak periods and
divert to TARP drop shaft. Located at North Ave. and Thatcher, River Forest, IL.
04-128-3P
Westside Primary Settling Tanks - Battery A Imhoff Replacement, SWRP
The Imhoff tanks are at the end of their useful life. This project will provide conventional primary
treatment to flows through the Westside Plant by converting the existing Imhoff tanks to circular
primary tanks. Nine 150 ft. diameter tanks will be constructed in each of the existing batteries A, B,
and C of the Imhoff tank area. Construction will be phased to do one battery at a time.
Currently, the sludge that is digested in the Imhoff tanks produces gas, but the gas is not captured.
The Imhoff tanks will be replaced with primary settling tanks. The sludge will be sent from the
primary tanks to the digesters, where the gas will be captured and used in the plant’s central boiler
facility as a heating fuel. The equivalent heating value of the digester gas compared to natural gas, at
today’s prices, is approximately $700,000 per year. This project will increase the amount of digester
gas used in the plant by 15%, thus reducing the District's reliance on natural gas.
04-129-3P
Westside Grit Handling Improvements, SWRP
Convert a portion of the existing Westside skimming tanks into grit removal basins. Involves
modification to flow distribution and collection channels, demolition of the existing tanks and
construction of new grit collection tanks. New grit slurry pumping and washing facilities will be
provided. Tanks will be covered for odor control.
04-130-3M
Digester Upgrades for Class A Biosolids, SWRP
Modifications to existing 24 anaerobic digesters to enable operation as a sequential batch temperature
phased anaerobic digestion mode for production of Class A biosolids. Modifications to existing
sludge holding tanks, new heat exchangers, heat recovery units, steam injectors, pumping facilities
and replacement of floating covers to fixed covers on 12 digesters.
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