Demolition at Xcel Energy Arapaho
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Arapahoe Decommissioning Project

SCOPE OF WORK:

  • Mobilize and demobilize labor, equipment, materials, and temporary facilities.
  • Control surface water and groundwater as necessary for the work per the SWMP.
  • Conduct thorough pre-demolition asbestos and hazardous materials surveys.
  • Furnish and install a security fence and gates as required.
  • All asbestos insulation and other materials abatement
  • Lead paint abatement as required for demolition activities
  • All plant structures demolition.
  • Outbuildings demolition including warehouses, shops, storage buildings, etc.
  • Building and equipment foundations removal, three feet below grade.
  • Circulating water tunnel removal.
  • All underground pipe larger than 4″ above ten feet below grade, electrical duct bank and cables, and other utility removals.
  • Site water well structure and piping demolition
  • Coal conveyor demolition.
  • Scrap material salvage.
  • All other chemicals, oil, etc. storage vessels shall be emptied and disposed of.
  • Environmental monitoring.
  • Removal of two (2) concrete stacks using conventional methods
  • Properly transport, store, treat, recycle, and reuse or dispose of all waste materials generated by the work.
  • Drain oil-filled equipment (No PCB’s present)
  • Removal of all universal waste (lamps, ballasts, bulbs, etc.)
  • Cleaning, decommissioning, and removal of tanks and associated appurtenances.
  • Impacted soil excavation if encountered during work activities.
  • Site cleanup & demobilization
  • Removed & crushed approximately 40,000 cubic yards of concrete.

ADDITIONAL PROJECT FEATURES:

Site: The Arapahoe site consists of 4 units. Units 1, 2, & 3 are 50 megawatts each & Unit 4 is 100 megawatts. There were 2 smokestacks, each 250′ tall. Approximately 40 outbuildings housed miscellaneous plant equipment, controls, workshops, etc.

Exterior: Available to wreck from 3 sides of the plant. Open surroundings. No major obstructions to prevent access during the course of demolition. The substation was located approximately 70′ behind the plant. NADC maintained boundaries between work areas & the active substation.

Interior: Turbines located on level 2. Condensers located at ground level. No basement. All 4 boilers were low pressure. Unites 1-3 consisted of a precipitator, boiler, & main plant section. The main plant sections were comprised of pulverizers, motors, coal hoppers and piping. The total abatement was performed throughout. Unit 4 was a baghouse, boiler, & main plant. The baghouse was added on & did not require the same amount of abatement as the precipitators. NADC made the necessary cuts and tripped the building using cables and appropriate rigging. Unit 4 Boiler was brought fully to the ground with no incidences.

SAFETY GOALS ACCOMPLISHED:

No recordable incidents by NADC. Consistently referred to as “the safest project Xcel has going” by Xcel Management Team.

 

Contact us for more detailed information on your
total demolition project.

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Blackhawk Power Station Demo

Interior strip out of power plant. Facility to be used as a recreation center for Beloit College.

  • Maintain groundwater and building seepage throughout the duration of the project.
  • Obtain all applicable demolition permits.
  • Removal of Unit 3&4 boilers/ turbines.
  • Removal of non-structural steel. Provide associated engineering plans.
  • Protection of architectural items to remain.
  • Coal handling outbuilding and foundation demo to 2′ below grade.
  • Precipitator structure and foundation demo to 2′ below grade.
  • Filling and abandonment of circulating water intake and discharge structures.
  • Clean and remove tanks and associated supports, piping, anchoring devices, and appurtenances.
  • Cover openings in the exterior of the building created by deconstruction with a weather-tight barrier.
  • Perimeter concrete fence removal.
  • Drain, flush and cap small diameter underground utility lines for in-place abandonment.
  • Fill all trenches, holes, pits, or other depressions with flowable fill.
  • Cap and fill large diameter water discharge piping with flowable fill.
  • Cut, cap, and fill circulating water pumps and partial piping with flowable fill.
  • Backfill excavations with granular fill material.
  • Install clean crushed concrete or aggregate environmental contact cap over the coal yard.
  • Conduct final site restoration of the exterior demolition areas and coal yard.
  • Removal of sheet pile wing wall in the river.
  • Installation and maintenance of temporary power supply.
  • Decommissioning of site mechanical systems- removal of process gases.
  • Removal and disposal of all remaining oils.
  • Decommissioning of discharge piping and screen house/intake tunnels.
  • Removal and disposal of all universal waste.

 

Contact us for more detailed information on your
power plant demolition and strip out project.

National Grid Far Rockaway Power Plant Environmental Demolition
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Far Rockaway Power Plant

The National Grid Far Rockaway Power Plant is a 100 megawatt, natural gas fired steam electric generating station. The station was originally commissioned in 1954 as a coal fired station and was converted to coal/fuel oil in 1966. Since 1994 the Far Rockaway station has utilized natural gas exclusively. The station was taken out of service in June of 2012 and in the late fall of 2012 North American dismantling was contracted to provide for the complete abatement and demolition of the power station.

Major Structures that were abated and dismantled include:

  • Unit #4 including the boiler house and turbine hall.
  • House boiler building.
  • Service building.
  • Circulating Water Intake Screen House.
  • Chlorinator House.
  • Fuel oil storage tanks including the 2,000,000 gallon Main Oil Tank and the 100,000 gallon Day oil tank, as well as, all ancillary underground and above ground piping and appurtenances.
  • Fuel Oil Transfer House.
  • Storage Building
  • Water Tank and Pump House
  • Fire Protection Building
  • Ash Silo Building
  • Continuous Emissions Monitoring Building
  • Coal Handling Structures
  • Transformers and Associated Overhead Transmission Lines
  • Circulating Water Intake and Discharge Tunnels
  • Barge Unloading Station
  • Groundwater Monitoring Wells
  • Permitted Production Water Wells.

Upon contract award NADC initiated preliminary project mobilization activities including permit acquisition. Detailed work plans and applications were filed with The City of New York Department of Buildings, Fire Department New York (FDNY), The City of New York Department of Environmental Control and The State of New York Department of Environmental Quality.

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East Kentucky Power Plant Demolition

Spurlock Unit No. 1 Backend Equipment

Work Performed: demolition, environmental decommissioning, asbestos abatement, equipment recycling, asset recovery

Project Description

This project consisted of the demolition of the structure known as Unit No. 1 Boiler Outlet of the East Kentucky Power Cooperative H.L. Spurlock Power Station located at 1301 West 2nd Street in Maysville, Kentucky. The structure was multi leveled to a height of 150’-0” above grade, totaling 180,000 sq. ft. and was constructed of structural steel framing, supporting various pieces of equipment.

Project Details

East Kentucky Power Cooperative contracted North American Dismantling Corp. (NADC) to complete the removal of the structure down to the existing slab including environmental decommissioning and asbestos abatement. The demolition included the removal and/or recycling as scrap; the steel framing, all equipment and machinery contained within and all mechanical, electrical and ancillary equipment including ductwork, fans, piping, conduit, steel guard posts and railings. Major equipment included but was not limited to:

  • Electrostatic Precipitator (1) including transformer/rectifiers and controls. (The control enclosure located in the plant is not included);
  • Induced Draft Fans (2) including the fan, 2-speed motor, oil filled speed changer, and lube oil units (4000 volt, 3500/200 Hp, 888/710 RPM);
  • Forced Draft Fans (2) including the fan, 2-speed motor, oil filled speed changer, and lube oil units (400 volt, 1500/100 Hp, 710/590 RPM);
  • Rothemule Regenerative Air Heaters (2);
  • Babcock & Wilcox Tubular Air Heater (1);
  • Sets of Steam Air Heating Coils (Secondary air) (2);
  • Miscellaneous duct sections stored in the lay down area.

This equipment had been in use for approximately 26 years on the flue gas outlet of a coal fire utility boiler firing eastern bituminous coal.

In addition to removing all equipment mentioned above, NADC removed a No. 2 oil fired Combustion Engineering package boiler rated at 110,000 Lb/Hr at 25 PSIG and 455 Deg. F steam outlet temperature, including all auxiliaries such as misc. pumps, fan, and condensate DA/storage tank are to be removed as well.
An ash piping bridge on the west side of the precipitator was required to remain. It was supported by a cantilever off the precipitator support steel. NADC had to modify a portion of the steel in order to adequately support the piping bridge prior to its demolition activities.

Also included as a part of its scope of work, NADC was required to salvage and save the following:

  • Primary Air Fans (2) including the fan, motor, and the lube oil unit;
  • Set of Primary Air Steam Coils (1);
  • Two (2) Bridge cranes located in the precipitator pent houses.

All environmental issues were addressed and abated by EKP prior to the start of NADC’s work. The ducts were vacuum cleaned and the regenerative air heaters were water washed to remove bulk ash by the owner prior to NADC’s work. Storm sewers and catch basins located in the vicinity of the work area were covered with visqueen or filter fabric to prevent any accidental discharge into the storm system.

Because of the potential dust, NADC maintained a misting of water on the areas of the structure being demolished. Wetting the building not only eliminates dust, it also kept the chance of any fire to an absolute minimum.

Consumers Energy DE Karn
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Consumers Energy Company D.E. Karn Plant

Demolition of Units 1 & 2 Primary & Secondary Existing Electrostatic Precipitators, ID Fans, Ductwork and Steel

Work Performed: power plant demolition, percipitator removal

Project Description

This project consisted of removing Units 1 & 2 Primary and Secondary Precipitators, ID Fans and all inlet/outlet ductwork located at the D.E. Karn Plant, 2742 N. Weadock Hwy in Essexville, Michigan. The structures were multi leveled to a maximum height of 125’-0” above grade, totaling 120,000 sf and was constructed of structural steel framing, supporting various pieces of equipment, hoppers, penthouses and other miscellaneous materials.

Worley Parsons contracted North American Dismantling Corp. (NADC) to complete the removal of the structures down to the existing slab including the environmental fly-ash remediation. The demolition included the removal and/or recycling as scrap material; the steel framing, all associated equipment and mechanical, electrical and ancillary equipment including ductwork, fans, piping, conduit, steel guard posts and railings. Major equipment/systems included but was not limited to:

  • Two (2) Primary Electrostatic Precipitators including transformer / rectifier enclosures and associated components;
  • Two (2) Secondary Electrostatic Precipitators including transformer / rectifier enclosures and associated components;
  • Four (4) Induced Draft Fans including the motor, oil filled speed changer and lube oil skids, skid enclosures and all accessories;
  • Flue gas ductwork running between the outlets of the secondary ESP’s and the inlets of the ID Fans including truss systems supporting ducts;
  • Fan discharge ductwork from the outlets to the ground level;
  • Wet fly ash collection systems including all piping, fittings, valves and pipeline components.

D.E. Karn Units 1 and 2 each consisted of a pulverized coal, tangentially-fired, double furnace, single reheat, balanced draft steam generator. Each unit had a gross rating of 275.MW. Unit 2 steam generator had low NOx burners that generated flue gas for the existing system. The flue gas for each unit had parallel flow paths that passed through selective catalytic reduction (SCR) system, regenerative air heaters, primary precipitators, secondary precipitators and ID fans before being discharged to the atmosphere through the chimney.

Hunter Power Plant Demolition smoke stack and hoist
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Electrostatic Precipitator Conversion

Electrostatic Precipitator Conversion to
Pulse Jet Fabric Filter (PJFF) Technology

Work Performed: dismantling, high lift and crane rigging

Project Description

This project was a fast track conversion of an existing electrostatic precipitator (ESP) to Pulse Jet Fabric Filter (PJFF) technology. Casey Industrial was PacifiCorp’s chosen design building contractor for this project. Project specs were identical for both the Hunter Power Plant Unit 2 and the Huntington Power Plant Unit 1..

The projects took place during the Owner’s planned outage in September of 2010. Notwithstanding, North American Dismantling Corp. (NADC) worked hand in hand with Casey to develop an execution plan months in advance of the outage date.

This execution plan included Casey engineering and installing a 4600 Manitowoc ringer crane as the main hoisting device for the project. In addition, Casey assisted the Owner in planning and executing an environmental “sweep” of the ESP at the inception of the shutdown. This allowed for a fluid transfer of the precipitator to Casey and its’ subcontractors.

NADC was mobilized and ready to begin operations as was originally specified. The ringer crane was used to stage demolition equipment on the precipitator as it was turned over. Cut lines were identified and laid out to confirm as built conditions. NADC then began its dismantlement operations.

NADC Xcel East Texas Power Plant Demolition
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XCEL Energy East Texas Plant

Demolition & Asbestos Abatement

Work Performed: power plant demolition, asbestos abatement, scrap material processing

Project Description

This project consisted of the demolition of all structures on site with only the concrete foundations to be left in place. North American Dismantling Corp. (NADC) subcontracted a local asbestos abatement firm to perform all asbestos abatement on this project. The asbestos abatement included, but was not limited to, asbestos siding removal and transite sheeting from offices and storage areas.

All accumulated waste on the site was disposed at the approved vendor landfill. Following the asbestos abatement, NADC performed demolition on numerous buildings at the site including the maintenance shop, main plant, pole storage barn, metal storage building, brick storage building, utility storage shed, wooden fire houses, can crushing building and any equipment residing in any of the buildings listed. The buildings removed totaled approximately 200,000 sq. ft.

All scrap materials from the site were the property of NADC at the commencement of the project. It was NADC’s responsibility to take title of all equipment and structures onsite and consider all options for the removal of equipment to include scrap processing, resale, etc. NADC followed all required state and federal regulations for the removal of the facility to include waste disposal regulations for items recycled.