Historical Restoration

Trigon has had the privilege of working on several projects of historical significance including Boston Avenue United Methodist Church, Philbrook Museum of Art, St. Joseph Monastery (1929) and the Harwelden Mansion, all on the National Register of Historical Places. We recently completed a 438 window restoration of Will Rogers High School in Tulsa, Oklahoma. At Philbrook Museum of Art, we restored 23 acres of historical gardens, constructed the new South Allee Garden and restored the exterior of the original Villa, completed in 1923. Our work at Philbrook was recognized both locally and nationally with "Excellence in Construction" Awards from the Associated Builders and Contractors of America.
Will Rogers High School Historic Window Replacement
Will Rogers High School, located in Tulsa, Oklahoma is listed on the National Register of Historic Places. The existing rolled steel windows and steel doors were considered significant features of this historic building. Trigon had the privilege of replacing all of the 438 windows and several doors with materials maintaining the visual characteristics of the originals. Restoration and repairs were also made to the terra cotta of the towers on this historic building.
St. Joseph Monastery Renovation
The Cornerstone Project consisted of an Interior Renovation, an Exterior Restoration, a new Parking Structure, a new Bell Tower, and site improvements including parking, paving, exterior lighting, irrigation and landscaping. The construction was coordinated with Monte Cassino School. The work was coordinated to minimize conflicts to insure the safety of the residents and visitors.
Philbrook Museum of Art Gardens and Grounds Renovation
Trigon was selected as Construction Manager for the Gardens and Grounds Renovation at the Philbrook Museum of Art in Tulsa, Oklahoma. The project site consists of 23 acres of gardens. The construction was completed in 22 months at a cost of $7,000,000. The project was completed on schedule and $103,000 under budget.

The Villa restoration consisted of cleaning and restoration of stucco, restoration of cornice, painting and addition of new handicapped entry from the interior to the gardens.

Harwelden Mansion
Arts and Humanities Council of Tulsa

Trigon was Construction Manager for the renovation of the exterior site improvements at the historic Harwelden Mansion in Tulsa. The renovation included 2 new parking areas, a bluestone plaza featuring a new bronze sculpture, new lighting, signage, irrigation and extensive landscaping.


We could not be more pleased with the end result of the monastery renovation. The remodeling of the first two floors and the addition of our parking pavilion and bell tower are truly masterpieces of fine craftsmanship.
Sister Christine Ereiser, OSB
St. Joseph Monastery
Philbrook has been through several major construction projects in the past. This is not only the first project to be completed on time, but also significantly under budget. We are so thankful that we chose Trigon and look forward to future projects with your fine company.
David Singleton
Chief Operating Officer
Philbrook Museum of Art
The community is so pleased with our results at the historic Harwelden Mansion. The management of our budget and timetable were exemplary and I was so pleased when the project was finished on time. In large measure thanks to your efforts, the public entrance to this important public building now has a presence that befits its wonderful history and work.
Wendy Thomas
Executive Director
Harwelden/Arts and Humanities Council of Tulsa