Dry Fork Station Unit 1

Project Description

Basin Electric Power Cooperative (BEPC) selected Sargent & Lundy to provide complete detailed design, procurement, and construction management services for the new Dry Fork Station. The plant was designed to add reliable and economical generating capacity to help meet the needs of BEPC’s more than 130 cooperative system members and of the Wyoming Municipal Power Agency. The project was performed with the active input and involvement of BEPC during design and construction as a collaboration to achieve the shared goal of meeting cost and schedule requirements.

The new mine-mouth power plant uses low-sulfur Powder River Basin coal and had to meet stringent environmental standards. The plant is a zero-discharge (liquid) facility and all air emissions were minimized through state-of-the-art air quality technologies and controls:

• Selective catalytic reduction (SCR) for NO_X.
• Circulating dry scrubber for SO₂.
• Pulse jet fabric filter for particulate control.
• Activated carbon injection (ACI) system for mercury control.

Project Scope

Specific scope activities included:

• Development of plant performance criteria, heat balances, and water balances
• Procurement and contract management of equipment for the power cycle, balance-of-plant, electrical systems, structural steel, switchyard equipment, secondary fuel systems, and plant auxiliary systems.
• Contracting for furnish and erection of the boiler, flue gas desulfurization system, coal handling, air-cooled condenser, activated carbon injection, fire protection/detection/alarm, chimney, and elevators.
• Contracting for installation of site work, substructures and foundations, superstructures, switchyard, electrical systems, mechanical equipment, piping, and other services.
• Quality inspection, surveillance, and expediting.
• Construction management.
• Material and equipment control.

The project was implemented using a multi-contract approach with Sargent & Lundy providing balance of plant engineering and procurement services not provided by suppliers of engineered equipment and providing project/construction management services. In this role, Sargent & Lundy served as the project integrator, where procurement strategies were established and carefully coordinated, from design through installation and testing to maximize value to BEPC through reduced schedule, minimized cost, and optimal plant performance.

More than 85 contracts were selected as part of the customized solution for the station based on geographical considerations, labor resource availability, and market conditions.

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