Mid-Mountain Surveyors has been in operation in rural Ferry County, Washington since 1983. Grant D. Tolton has over 40 years professional experience.

In over two and a half decades of operation, the professional staff at MMS has gained extensive experience in cadastral (boundary) surveys, site topographic surveys, road as-built surveys, right of way surveys, photogrammetry (flight control) panel surveys, GPS control surveys, subdivision surveys, boundary line adjustment surveys, GIS surveys, flood plain study surveys, underwater topographic surveys and pile volume surveys to name a few. We are accustomed to working in a variety of coordinate ...

In over two and a half decades of operation, the professional staff at MMS has gained extensive experience in cadastral (boundary) surveys, site topographic surveys, road as-built surveys, right of way surveys, photogrammetry (flight control) panel surveys, GPS control surveys, subdivision surveys, boundary line adjustment surveys, GIS surveys, flood plain study surveys, underwater topographic surveys and pile volume surveys to name a few. We are accustomed to working in a variety of coordinate systems including state plane, local grid, UTM and geodetic. In its twenty-six years of continuous operation, our field crews have retraced literally hundreds of miles of original government (GLO) surveys, recovering and perpetuating scores of original GLO corner monuments. MMSI has recorded hundreds of surveys in counties across the state. Specializing in thorough research and deliberate and patient analysis of evidence, we have gained a well deserved reputation for quality work. MMSI also specializes in all aspects of construction surveying. From preliminary site surveys, to construction layout to as-built surveys of the completed project, we apply the latest technology to bring high production and efficiency to any size project with a quality assurance protocol acquired over decades of experience. In the context of construction projects, we work exceptionally well with project and field engineers to create in-the-field solutions to problems that often arise during the