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Clinton County Geographic Information Systems
Department
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Survey Monumentation Information ----------------------------------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------- Important Note: The Points on the maps are shown in the general location of the actual monument sites. ----------------------------------------------------------------------------------------------------- Reports 1 & 2
----------------------------------------------------------------------------------------------------- Once you've found a monument you want information for, click on it's Station ID below for more information. If you want to download all of the PDF files to your computer at once, click here. Clinton County:
![]() NGS & Other Counties:
----------------------------------------------------------------------------------------------------- The following is a quote from our first contract with Woolpert Inc. on the placement of our county-wide permanent monumentation grid.Woolpert will establish, target, and GPS observe 30 first-order horizontal (blue booked) and third-order vertical monument pairs (60 points). Monuments will be 3-foot concrete with bronze cap and flush with the ground surface. Monument pairs will be in the Ohio State Plane Coordinate System (South Zone). Horizontal datum will be North American Datum (NAD) 83 (86) adjusted to the Ohio HARN system. Vertical datum will be North American Vertical Datum (NAVD) 88. These monuments were designed to last 30 to 50 years, if left undisturbed. The installations took place during December / January of 1999. Surveying of each monument took place during the last two weeks of April, 1999.
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