Project Description

Main Street Bridge Over Interstate 49

Project Details:


Grandview, Missouri


Missouri Department of Transportation


Land Surveying

Project Description:

Powell CWM provided land surveying and mapping services to the Missouri Department of Transportation for the replacement of the Main Street Bridge over Interstate 49 in Grandview, Missouri. The services were completed under a Master Hourly Rate Fee Agreement and issued under Memorandum of Understanding (MOU) number KC-28. The project was completed and delivered on December 24, 2014 and consisted of the following land surveying and mapping services:

  • The establishment of a first order control network referenced to the Missouri State Plane Coordinate System of 1983.
  • The establishment of a minimum of three control points in concrete and benchmarks drilled and epoxied in existing bridge and provided reference ties.
  • Reestablished the existing horizontal alignment and right of way of Interstate 49, Outer Roads, and Main Street through the project area.
  • Reestablished the East line of Sections 14 and 23, Township 47 North, Range 33 West and provided ties to the project.
  • Provided mapping and tin file of Interstate 49, East and West Outer Roads, and Main Street within the project area.
  • Prepared a MoDOT bridge survey report.
  • Obtained location and elevations of existing bridge deck corners, piers, abutments, and minimum vertical clearance.
  • Mapped utilities per observed evidence together with evidence from plans and marking by Missouri One Call. Rim and inverted elevations were taken on all sanitary and storm sewer structures within the project area.

3D laser scanning was used to perform a majority of the project’s mapping. A Leica C10 laser scanner attached to our vehicle mounted terrestrial scanning platform (TopoLift) was utilized to map the existing bridge abutments, piers, vertical clearances, and roadways. This method was chosen to avoid hindering traffic operations and for its speed in data collection.

Secondary control points were established for the scanning phase at approximately 500-foot intervals along both the north and south bound lanes of I-49 and outer roads. These points were established using traditional surveying traverse methods and differential leveling.

The scan data consisted of 121 ScanWorlds and over 1.5 billion points that were analyzed, registered, and extracted using Leica Cyclone-Register software. The registered points were modeled and the roadway triangulated irregular network (tin) model was created in MicroStation utilizing TopoDOT point cloud processing software.

A right of way survey was performed that included the retracement of the original Route 71 (West Outer Road) originally created as Belton Avenue in 1917 by the plat of Grandview Acres, Blocks 1 through 4 and situated between High Grove Road and 135th Street. The remaining West Outer Road alignment was established by the State Highway Commission’s survey of 1931. The right of way survey also included the retracement of the existing right of way lines of I-49 (formerly Route 71) having been secured in 1923 through 1935 and 1953 through 1956. The I-49 right of way was surveyed and remonumented from station 132+00 to 190+00.

Powell CWM prepared and delivered a Pre-Design Survey, 3D point cloud, and a detailed survey report. The project was completed on time and within budget.

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