Natchez Trace Bridge

Project Description

Wiser was issued a task order under our Field Survey IDIQ contract to support the TDOT Structures Division by providing as-built data for a newly constructed bridge that was being transferred to the National Park Service. Specifically, the bridge chamber component was in question. In order to verify this, the bridge needed to be measured with an extreme level of detail.

The data was captured using a Riegl VZ-400 static lidar scanner. The data capture was repeated in differing weather conditions to measure the effect of temperature changes. The data sets were reduced and a survey report was provided detailing chamber changes along the bridge at 5 foot intervals. Wiser worked with TDOT to ensure that they could utilize the full potential of the lidar data within their internal processes.

 

SR-268 Thompson Lane

Project Description

Wiser was selected to provide survey and design services for the proposed widening along a 4.5 mile roadway corridor through a dense residential district. Due to the high traffic volume, there were major safety concerns for field personnel. Wiser therefore utilized mobile terrestrial laser scanning to capture roadway and adjacent features. Not only did this approach prove to be much safer, we were able to reduce costs by nearly 50% over a fully conventional topographic survey.

This corridor crossed the Stones River which is a navigable waterway. Wiser collected river bottom soundings and cross sections of the floodplain. Due to the large floodplain area, we used a combination of conventional survey data and terrestrial LiDAR within the project limits and publicly available aerial LiDAR for the outer reaches of the floodplain. This approach saved overall time and reduced costs. Additionally, Wiser has completed the research and mapping of over 200 property parcels along the corridor.

 

SR-397 Mack Hatcher Parkway

Project Description

Wiser completed an existing conditions field survey of a 1 mile section of Mack Hatcher Parkway from Lewisburg Pike to Royal Oaks Boulevard. To meet the challenge of producing a detailed topographic survey on an extremely congested corridor without any major traffic disruptions, we captured the road surface using mobile LiDAR scanning. The scanning was completed in a few hours with no impacts on traffic flow. The data was post-processed and classified to a bare-earth surface. Striping, pavement edges, breaklines and overhead wires were extracted from the scan data using TopoDOT software which runs directly in MicroStation. The result was a much more detailed survey than would be feasible using conventional methods while avoiding any risk to field personnel or the public at a significantly lower cost to the customer.