Renovation of a water / sewer project in Rochester, Minnesota. Completed plans call for the renovation of a water / sewer project.

This project is to rebuild the west main drag conveyor for the air pollution control ash conveyance system located at the Olmsted Waste to Energy Facility (OWEF) in Rochester, Minnesota. Question Deadline 11/06/2024 at 2:00 PM CT 11/12/2024 3:00 PM (ET) Participation Contract Award This work shall be performed between April 17, 2025, and April 25, 2025 1.2 The OWEF is a waste-fired cogeneration power plant located in Rochester, Minnesota that is owned and operated by Olmsted County. The OWEF provides heating, cooling, electric power, and other utility services to a number of local buildings. The primary fuel for the OWEF is Municipal Solid Waste (MSW), with natural gas and light fuel oil serving as backup fuels. 1.3 The OWEF consists of two (2) 100 ton-per-day and one (1) 200 ton-per-day MSW combustor boiler units of the mass-burn water-cooled wall design, three (3) steam turbine-generators, MSW receiving facility, ash handling systems, air pollution control equipment, necessary auxiliary installations, medium voltage equipment necessary to connect with the utility grid, and a natural gas fired backup boiler. 1.4 The two (2) 100 ton-per-day Riley/Takuma waste combustor boiler units, Unit 1 and Unit 2, were commissioned in 1987. Unit 1 and Unit 2 are of the stoker fired, watercooled wall, excess air type. Unit 1 and Unit 2 supply about 25-30 kpph of live steam each, at 610 psig, 610-6500 F. The one (1) 200 ton-per-day AEEVR/ Duro Dakovich waste combustor boiler unit, Unit 3, was commissioned in 2010. Unit 3 is a stoker fired, water-cooled wall, excess air type. Unit 3 supplies 57-63 kpph of live steam, at 610 psig, 610-6500 F. The 75 kpph dual fuel Nebraska packaged boiler unit provides backup steam at 250 psig saturated conditions for use during the waste combustor boiler shutdowns. 1.5 Electrical power is generated with one (1) backpressure steam turbine generator unit of 1.86-MW nominal capacity (TG1), one (1) condensing steam turbine generator unit of 2.22-MW nominal capacity (TG2), and one (1) condensing/extraction steam turbine generator unit of 5.4-MW nominal capacity (TG3). TG1 and/or TG3 supply steam to a 60 psig header used primarily for the OWEF district energy system; TG2 exhausts into air cooled condenser 1; and TG3 exhausts into air cooled condenser 2. Steam from the 600 psig header is also cascaded to supply 250 psig steam headers through pressure reducing and desuperheating stations. 1.6 The facility operates continuously twenty-four (24) hours per day, seven (7) days per week, fifty-two (52) weeks every year. The planned operating schedule of each boiler allows for normal planned maintenance to be accomplished without interrupting the supply of steam or electricity. There are currently three (3) scheduled maintenance shutdowns per year for Unit 1 and Unit 2 each and two (2) scheduled maintenance shutdowns per year for Unit 3. Outage durations vary depending on the time of year, but normally requires about two (2) weeks for Unit 1 or Unit 2 and four (4) weeks for Unit 3. Outages typically do not occur simultaneously. 1.7 This project shall have all work specified below performed as a turnkey service, unless indicated otherwise in this specification. The contractor shall supply all supervision, labor, and tools for all work conducted onsite