The Oyate Health Center is a tribally-owned primary care clinic in Rapid City, SD focused on providing the highest standards of care for tribal-citizens.

The 204,000 SF Clinic is operated by Great Plains Tribal Chairmen’s Health Board on behalf of the Oglala Sioux and Cheyenne River Sioux tribes serving the Lakota Nation

The depiction of star knowledge and geography was used purposefully to promote healing, and as an organizational/wayfinding concept throughout the facility.

EAPC provided mechanical and electrical engineering design for the project focusing on LEED Gold design criteria.


EAPC uses MEP engineering philosophy to streamline the design and construction of the building’s mechanical, electrical, and plumbing systems. Focusing on HVAC, wiring, and plumbing our engineers use scientific principles to develop efficient, sustainable designs while mitigating potential conflicts. This integrated approach ensures seamless installation and operation, creating functional and cost-effective building environments.

The following MEP related strategies were incorporated into the design:

  • Ground mounted solar panel array sized at 174 KW
  • Heat recovery chilled water system, ground mounted air-cooled chillers serving exterior ice storage tanks
    Ice Storage, the chilled water system makes ice during overnight hours and uses ice during the day. Payback calculated at four years.
  • Using condensing boilers operating above 95% efficient year around. Max heating temperature is 135ºF
  • Site Development – Protect or Restore Habitat – respecting nearby wetlands and using native plantings
  • Open Space – not over developing the site – maintaining ample green space
  • Rainwater Management – slowing runoff via grading and holding water on site
  • DDC energy monitoring
  • Electric car charging space for green vehicles
  • Dimmable lighting control design for over 90% of building spaces