The State of Michigan hired The Christman Company to undertake the most comprehensive renovation to the State of Michigan Capitol Building since its construction in 1871. The ongoing project includes renovations to the existing entrance and dome; subsurface visitor center; office and annex expansions; utility and data upgrades; surface parking, and geothermal heating system.
To plan this monumental task, The Christman Company soon realized that they needed to know exactly where all the hundreds of utilities on the approximately 14-acre site were located. MISS Dig and the other utility owners were consulted, and it was soon determined that the stacks of plans and drawings dating back decades were either incomplete, incorrect, or just plain confusing. Christman had worked with Wolverine Engineers and Surveyors, Inc. previously and elected to perform a Level B Subsurface Utility Engineering (SUE) Investigation with the ultimate goal of preparing an all-inclusive As-Built plan of every existing utility beneath the surface of the 14-acre site.
Wolverine scanned the entire Capitol city block with Ground Penetrating Radar and radiodetection equipment to physical locate all existing known utilities and identify unknown utilities. The identified utilities were located by our surveyor and a plan sheet was drafted. Additional research was then done to attempt to identify all of the observed utilities, which we were ultimately successful in doing. The plan sheet is revised when work takes place on site and has ended up being a timeline for construction at the site that helps identify live and abandoned utilities at the site as well as track when utilities have been removed. In addition to the survey plan, 360-degree photographs were taken of the marked utilities in a grid system across the project site. These photographs are linked to icons on the drawing that allow one to compare the drafted utility to actual photographs of the site surface.