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Jacobs Engineering Group, Inc.
Adolfson & Peterson Construction
This project includes the renovation of the Old Main Heating Plant building to add combined heat and power generation equipment and space plan for a future package boiler and future chilled water plant equipment to create a multi-function Old Main Utility Building. Originally constructed in 1912, the Old Main Heating Plant has undergone several renovations/additions over the years. It houses seven (7) coal & gas fired boilers, the last of which was shut down from steam production in 2000. Since that time the building has fallen into disrepair. The building also currently houses a steam pipe fitter workshop area and provides key access points to the deep steam tunnels.
Due to both the growth of new University buildings requiring steam service and aging boiler equipment on the Minneapolis campus, the University is at risk for a shortage in firm boiler capacity relative to winter-time peak steam demand beginning in 2014. Therefore, new steam boiler equipment that will provide the additional required steam capacity needs to be added to the Minneapolis campus. This will be accomplished by installing new combined heat and power equipment in the existing Old Main Utility Building located adjacent to the Mississippi river in the Knoll area. The combined heat and power equipment represents a two stage configuration. First a new natural gas fired turbine will generate electricity for use on the Minneapolis campus. Second a new heat recovery steam boiler will recover heat from the combustion gases that are discharged from the turbine to generate the required steam capacity. The combined heat and power equipment solution was chosen because the added benefit of electricity generation for use on campus further reduces the carbon footprint for the University and represents the best long term sustainable solution from an energy use standpoint. Additionally, the plant will be designed with space allocation for future installation of a packaged boiler as well as two steam turbine-driven chillers.
A significant portion of the project budget is devoted to hazardous materials abatement for both the Old Main building and the adjacent incinerator building (which is planned to be demolished as part of this project). The existing boilers and piping within the Old Main building contain significant amounts of asbestos in the boiler and piping insulation. Abatement/demolition of the boilers is also complicated by the fact that the building structural columns were built integral with the boilers. Therefore, some of the building columns will need to be removed and replaced as part of the boiler demolition work. The building exterior walls are in relatively good shape and will be refurbished where required. The building roof profile will be simplified by removal of the multiple penthouses and a new roof will be installed.
December 2012: Schematic Design Complete
January 2014: Abatement Begins
August 2014: Construction Documents Complete
February 2014: Demolition Begins
January 2015: Construction Begins
November 2016: Construction Complete
Interior equipment demolition is complete. Interior structural demolition is ongoing. Excavation work for the retaining wall has re-started. Removal of existing roof, floors and structural steel is in progress, as well as removal of lead from existing structure as required. Erection of structural steel is in progress. Equipment and materials procurement is in progress. Some of the equipment purchased by the university has been delivered and is being kept in a storage facility.
Interior equipment demolition is complete. Retaining wall work is on hold until spring. Removal of existing roof and structural steel is in progress, structural steel to remain is being grinded to clean off angle clips. The University has hired a contractor to clean lead paint off existing steel that will remain at locations where new steel is to be welded to existing.
Demolition of coal bunker is nearing completion. Existing welds and angles are being cleaned from existing columns which will remain. Retaining wall work is on hold until Spring.
Demolition work inside of the building, which includes coal bunker, tanks, and catwalks, is in progress. A first layer of Shotcrete has been applied at the upper retaining wall. Work on the retaining wall is on hold for now due to cold weather. Grading excavation is in progress. Installation of the 4” temporary gas line is now complete.
Abatement work is complete inside the building, and containment wall is down. Demolition of boilers and piping continues. Demolition of the coal bunker has started and will continue for the next few weeks. The work on the retaining wall is in progress. Excavation, drilling of anchors, placement of rebar is ongoing and the shotcrete work has begun. Work on the retaining wall will continue this year as long as weather permits. Gas for temporary winter heat will be brought into the site in November.
Demolition and abatement on East side containment, office area, upper pump house and miscellaneous parts of the building is about 90% complete. The coal hopper from the coal storage is completely demolished. Demolition of offices is in progress. The contractor has started doing layout work for civil work and retaining wall construction. Testing of the retaining wall soil nails and rock bolts has begun.
The abatement and interior demolition work is on-going. Demolition work is 90% complete on the east half of the building. The east half of the building is under containment with both abatement and demolition taking place inside the containment. The contractor has now over 200 days without a lost time accident and is averaging 32 workers on site per day.
The abatement and interior demolition work is on-going. The east side of the building is now in containment and abatement; work is in progress. The contractor is demolishing boilers 4, 5 and 6. Site work will be starting soon.
The abatement and interior demolition work progresses is on-going. Prepping work for the east side containment is being finalized, including moving the North-South barrier wall. The retaining wall, which is part of the site work, is on hold and being redesigned.
The abatement and interior demolition work on the old main building is on-going and the contractors are making good progress. Site demolition work is moving ahead with excavation scheduled to start April 22nd. Removal of the roof breeching will begin on May 5th.
Construction documents and air emission permits are under revision and review; these will be ongoing tasks for the coming months. Options are being considered for the storage of the turbine, and heat recovery steam generator (heat recovery boiler), as to which will be most economical and practical. Appropriate permits have been acquired, or are awaiting review for demolition, and building. Hazardous material abatement work necessary for demolition continues.
Construction documents are ongoing. Design coordination is ongoing for the Owner procured turbine/generator and the Owner procured heat recovery steam generator (heat recovery boiler). Hazardous material abatement work along with supporting minor demolition work is ongoing.
Construction documents have begun. Design coordination is underway for the Owner procured turbine/generator and the Owner procured heat recovery steam generator (heat recovery boiler). Hazardous material abatement work along with supporting minor demolition work is ongoing.
The hazardous material abatement contract has been awarded. The application paperwork for the air emission permit amendment application has been submitted to the state MPCA for initial review. Hazardous material abatement work along with supporting minor demolition work has begun.
The Design Development documents are complete. Further refinement of the design will take place as we move into Construction Documents. The Owner procured turbine/generator has been purchased and is currently in the manufacturing process. The Owner procured heat recovery steam generator (heat recovery boiler) has been purchased and is currently in the manufacturing process. The Owner procured natural gas compressor RFP will be issued soon. The RFP has been issued for the hazardous material abatement contract. We are nearing completion of the application paperwork for the air emission permit amendment application and will be submitted to the state MPCA in the near future.
The predesign is complete. Further refinement of the design will take place as we move into SD/DD/CD’s. In anticipation of moving forward the following activities are also underway: