Dewatering & Load Out Facility Build

INDUSTRY

Power Generation

TIMELINE

Total: 2 Years | Concrete Foundation Scope: 4 Months | Structural Steel Scope: 9 Months | Mechanical Scope: 9 Months| Electrical Scope | 10 Months

LOCATION

Colstrip, MT

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OVERVIEW:

Loenbro was entrusted by a key contributor in the U.S. power generation sector to construct a critical Dewatering & Loadout Facility in Colstrip, Montana. Demonstrating our comprehensive service offerings, our multi-disciplinary crews—encompassing concrete, structural steel, mechanical, and electrical scopes—expertly executed all facets of this complex facility. This project involved placing 2700 cu yd of structural concrete, the erection of over 800 tons of structural steel for two new buildings, and the installation of all mechanical & electrical systems, showcasing our ability to deliver a full suite of solutions. A significant element of the project included the precision placement and erection of 4 100,000lb GHT 2000 filter presses on the fifth floor of the Dewatering Building, each discharged into four reversible conveyors. This project is a testament to Loenbro’s ability to seamlessly integrate diverse service lines and deliver large-scale, intricate projects within the power generation industry.

CHALLENGE:

  • Limitations on concrete supply due to the output of local batch plant and pouring in remote locations during the winter required high-level pre-planning
  • Supply chain disruptions forced a dynamic ‘as-built’ steel erection, adapting to fluctuating material deliveries and integrating delayed owner-supplied conveyors

SOLUTION:

  • Our daily communication and out-of-the-box approach allowed steel workers to proceed.
  • With the delay of supplier piping materials, we increased our manpower to meet critical project deadlines.

See the success

  • Mechanical & Structural

    • 7 levels of Steel Framing

    • 5 levels of Elevated Concrete

    • Installed 10 ton overhead bridge crane

    • Sloped roof into 5 shop-assembled trusses

    • 13,000 LF of pipe fabrication and install

    • 600,000 weld inches

    • Install and align 60 pumps 10hp-350hp

  • Soft Craft

    • Heat Trace installation for all outside interconnecting Process and Water piping

  • Critical Electrical

    • Over 300’ of 1600A bus duct and 4000A bus duct

    • Over 10 miles of multi-conductor cable along with Megger Testing, Hipot Testing, and terminations

    • Installation of miscellaneous 480V Power Panels, Lighting Panels, step down transformers along with over 500 light fixtures, convenience outlets and welding capabilities

    • Cable tray installation to provide raceways interconnecting three buildings and connecting internal conduit drops for multiple power, control, and instrument devices

    • Temporary power installed throughout the facility

    • Installation of DCS cabinets with a fiber network interconnecting control room and an existing control room

    • Over 15 miles of instrument cables pulled, tested, and terminated

    • Loop checks for up to 250 devices

    • Commissioning and start-up for over 30 systems

    • Three new MCC sections, along with an 4000 AATS, Back-up Generator, Utility Transformer, and a CT Cabinet

    • Instrument air tubing to 87 air actuated valves

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