In-The-Field:Truro, MA - Collaboration |
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| Project: | Use of non-invasive geophysical survey methods to investigate standing structures and their surrounding environment. |
| Location: | Truro, Massachusetts |
| Property: | Circa 1800 full cape (builder unknown) and surrounding property |
| Collaborators: | Margaret S. Watters, Geophysical Survey
Systems, Inc. Barbara A. Mitchell, BRW Tom Watson & Francie Randolph, Homeowners |
| The goal of this study is to
assess the value of using a non-invasive technique such as ground penetrating
radar to gain information that is not visible. For example: establishing
information on how filled doorways or windows appear in the GPR record based on
wood density, moisture content, and dimensions; the owners have fished 100-year
old artifacts (tools, tangled fish hooks and line) from the very nasty attic
insulation. Survey of the ceiling just below this should locate any other
artifacts of this nature. The basement had a traditional round basement (a root-cellar type opening excavated below the kitchen) that has now been expanded into a regular cut-out basement on one side of the house. GPR investigations into the floor and walls of the original round basement may reveal voids or buried artifacts. |
![]() Plot Plan of Property |
![]() Circa 1920s |
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![]() 2000 (view from the east) |
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Ground Penetrating Radar (GPR) was used to collect radar profiles on the interior and exterior of the house, as well as on the surrounding grounds. On the interior, survey data was collected above the fireplace and on the floor of the living room from the hearth across the room. On the exterior of the building, data were collected along the eastern wall at the location of a previously existing and documented doorway. |
![]() Study area inside house |
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![]() Collecting radar profile over wall |
![]() Collecting radar profile over hearth with 1500 MHz antenna |
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Radar profile over wood floor and brick
hearth. |
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![]() Attempting to map structural evidence for a know doorway previously in this location. ![]() Field Equipment: SIR System-2000 GPR unit 1500 MHz antenna Survey wheel |
![]() Architectural Historian mapping property features ![]() GPR survey (lower left) concurrent with structural analysis (middle right). |
Geophysical Survey Systems
Inc., Member Oyo Group
www.geophysical.com