CGA Engineers worked with the Cherokee Nation and their architectural firm Selser Schaefer Architects to provide professional civil design services for the new developments at the W. W. Hastings Hospital in Tahlequah, Oklahoma.  The project included work on three sites on the hospital campus; a new warehouse, an expansion to an existing building, and improvements to the urgent care entrance to the hospital.  The civil engineering scope for the project included project scoping, City of Tahlequah coordination, site layout and grading design, retaining wall design, pavement and surfacing design, stormwater pollution prevention plan development, and erosion control design.  CGA Engineers worked with Selser Schaefer Architects to produce and provide construction plans and contract documents to the Cherokee Nation Planning and Development department.

The warehouse building site includes a warehouse building that is connected to the hospital with an enclosed corridor and a new 200 space parking lot.  The undeveloped site had 45 feet of elevation change with slopes exceeding 10 percent throughout most of the site.  9,750 square feet of segmented retaining walls and 2,743 square feet of cast-in-place concrete were used in the design to accommodate the steep site.  The detention pond for this site needed to have a small footprint due to the small site;  this was accomplished using series retaining walls to increase the available depth for the pond.

The building expansion included a patient drop-off that allowed for the vehicles to get off of the street and under cover, collection of stormwater that originally passed to neighboring property, and management of the stormwater to reduce the impact of stormwater.

The entrance to the new Urgent Care Center project included reworking the sidewalks and surfaces to accommodate ADA regulations.