Modify Intersection , and Lighting

2026-11-03

The Contractor will revise the design surface DTM as required to support construction operations and to reflect any contract plan revisions the Department makes . The Contractor will perform checks to confirm the revised design surface DTM agrees with the contract plan revisions . The Contractor will provide a copy of the resultant revised design surface DTM to the Engineer in LandXML . The Department will pay for costs incurred to incorporate contract plan revisions as extra work . The Contractor will designate a set of control points , including a total of at least 6 horizontal and vertical points or 2 per mile , whichever is greater , for site calibration for the portion of the project employing MCG . The Contractor will incorporate the Department provided control framework used for the original survey and design . The Contractor will calibrate the site by determining the parameters governing the transformation of satellite information into the project coordinate system . The Contractor will use the control points provided by the Department for the initial site calibration . The Contractor will provide the resulting site calibration file to the Engineer before beginning subgrade construction . In addition to the site calibration , the Contractor will perform site calibration checks at individual control points not used in the initial site calibration . At a minimum , the Contractor will check the calibration at the start of each day as described in the contractor ' s MCG work plan . The Contractor will report out - of - tolerance checks to the Engineer . The measured position must match the established position at each individual control point within the horizontal tolerance of ± 0 . 1 foot and the vertical tolerance of ± 0 . 05 foot .

South Dakota

2026-05-15