Dale Stockstill & Associates was hired by Boardwalk Pipeline to provide 2D Plan and Section piping drawings for upgrades to be performed at two sites in their Jackson Yard facility. DS&A used their Topcon GLS 1500 High Definition Laser Scanner to scan the two areas where the work will be performed. The existing pipes, valves, walkways, racks and footings were traced by Aaron Lee, a DS&A technician, to provide the initial existing condition plans to be used by the BWPL engineer for his design. DS&A will also provide the Demolition, Construction, and As-Built drawings for these two projects. The use of the GLS 1500 enabled DS&A’s crew to do all the preliminary surveying necessary for the projects in one day- a project that would have taken 3 to 4 days of conventional surveying.
Boardwalk Pipeline hired Dale Stockstill & Associates’ to provide preliminary and pre-construction surveying for 3 sites in the Mobile, Alabama area that needed to be Hydro Tested for compliance with DOT High Consequence Area regulations. The sites consisted of a school, a church, and a nursing home facility and the 10” High Pressure Gas Pipeline that is buried near each. DS&A’s crew located and probed the pipeline along each site reestablishing the pipeline stationing by comparing features such as vents, road crossings, etc. to their original stationing per the 1950’s era alignment sheets. After their preliminary surveying on each site was done, the crew went back to meet with representatives from CharCo, the contractor who would be performing the hydro tests, and Boardwalk Pipeline representatives and inspectors. The crew staked the HCA limits and also placing stakes at each Potential Impact Radius (PIR) point which were calculated from precise locations of the impacted buildings as they relate to the existing pipeline. The crew also located existing utilities which were located by the “OneCall” requested by Boardwalk Pipeline and CharCo.
DS&A was the prime survey contractor for a large Corps of Engineers urban flood relief project in the Ninth Ward of New Orleans. Working with Surveying Solutions, Inc out of Standish, Michigan, the entire 123 acre project site containing 4 miles of city streets, was mapped with Mobile LiDAR to engineering grade standards in less than a day. Dale Stockstill & Associates augmented the data collected with Surveying Solutions’s Riegl Mobile Mapper with additional point clouds from their laser scanner, RTK, and conventional total stations shots. The two firms divided the processing work parceling out the individual tasks in order to meet the Core’s strict deadline for delivery. Providing contours and a 3D Microstation drawing of the entire project area. DS&A office technicians parsed through the immense amounts of data to provide the client with the above and underground utilities. You can read more about it by clicking the link below:
In 2010, the Construction Division at the New Orleans District of USACE had a Quality Control concern at Lilly Bayou, a large flood control weir just north of Baton Rouge, Louisiana. The specifications on a 5 to 1 concrete slope were to be no more than 1/8 of an inch of deviation in any 10 feet. They didn’t think the contractor met the specifications but couldn’t prove it by conventional survey methods. DS&A was requested to perform a test scan which, when completed settled the question once and for all. The deviations in the surface were obvious in the point cloud. DS&A was subsequently awarded a task order to scan the whole structure and provide specific CAD and ascii deliverable’s to the Corps engineers. Along with this data DS&A also delivered “color mapped” pdfs as well as contours to assist the engineers in determining the specifications.
Read more: Laser Scanning on a Flood Control Structure
Dale Stockstill and Associates was tasked by the New Orleans Corps of Engineers to Topo approximately 4 miles of existing levee in St. Charles Parish, LA. The task order specified a combination of RTK and Conventional Surveying methods but we were granted permission to use our Topcon GLS-1000 laser scanner to collect data on the levee and adjacent areas. For the portion that was to be profiled by chopping out ranges and running traditional cross sections with a total station, DS&A used existing Lidar data which was archived on ATLAS, The Louisiana Statewide GIS repository. Using Kubit to work with point clouds in Autocad, DS&A extracted the required cross section data and submitted it in the required ASCII format along with furnishing the Corps with a mesh surface model and 3D model of the extensive improvements along the levee. Using the GLS-1000 Laser Scanner and existing Lidar data, we were able to furnish the Corps with more than they expected for no additional cost.