Common use of Horizontal Control Clause in Contracts

Horizontal Control. Control shall be established along adjacent State Route and provide reference ties for control recovery.  Horizontal control shall be constrained to the Missouri Department of Transportation Real-Time Network.  Control shall be referenced to the North American Datum of 1983 (NAD83) (2011), Epoch 2010.  Orthometric heights shall be referenced to the North American Vertical Datum of 1988 (NAVD88) using the current GEOID18 model.  Control shall be referenced to the Missouri Coordinate System of 1983 in the west zone.  Control point shall consist of 5/8” x 24” rebar with a 2” aluminum cap containing a defined datum point.  2D or 3D control point shall be placed a minimum 6 inches below the ground’s surface. If set in a cultivated field, the point shall be placed 12” below ground’s surface.  Control shall be placed at the following locations and interval spacing:

Horizontal Control. Control shall be established along adjacent State Route and provide reference ties for control recovery.  • Horizontal control shall be constrained to the Missouri Department of Transportation Real-Time Network.  • Control shall be referenced to the North American Datum of 1983 (NAD83) (2011), Epoch 2010.  • Orthometric heights shall be referenced to the North American Vertical Datum of 1988 (NAVD88) using the current GEOID18 model.  • Control shall be referenced to the Missouri Coordinate System of 1983 in the west zone.  • Control point shall consist of 5/8” x 24” rebar with a 2” aluminum cap containing a defined datum point.  • 2D or 3D control point points shall be placed a minimum 6 inches below the ground’s surface. If set in a cultivated field, field the point shall be placed 12” below ground’s surface.  • Control shall be placed at the following locations and interval spacing: