Collins developed a risk-based asset management program for the Colorado Department of Transportation’s (CDOT) retaining and sound walls.
The scope of work included:
- Development of a CDOT Recording and Coding Guide for the Inventory and Inspection of Colorado’s Retaining Walls and Sound Walls
- Development of a web-based data management system compatible with the CDOT BrM and NBIS databases
- Development of a risk-based inspection program and a risk-based asset management plan for retaining walls and sound walls
- Inventory and inspection of the retaining walls and sound walls on Colorado’s state highway system
The formulation of this new program was efficiently completed in less than one year, which led to a long-term funding plan. This asset management program is designed to protect the safety of the traveling public, improve mobility, and reduce maintenance expenditures by identifying deficiencies and evaluating the performance improvement through a range of corrective actions.
Collins developed the preliminary wall inventory for CDOT by performing a desktop study using Google Earth and CDOT’s OTIS program to identify wall locations. The inventory includes both interstate highways and NHS highways and took three months to complete and revealed over 1,600 walls. The data was integrated with CDOT’s current Bridge Management (BrM) and National Bridge Inventory System (NBIS) databases. Collins has also completed the development of the CDOT Recording and Coding Guide for the Inventory and Inspection of Colorado’s Retaining Walls and Sound Walls.
The new asset management program is risk-based with respect to MAP-21 performance targets and the analysis is directed at obtaining the greatest reduction in risk over the remaining life cycle. The inspection and management of these assets is being performed using a web-based data collection application on handheld mobile devices that was developed by the Collins Team. The handheld mobile device collects, geospatially locates, analyzes, and organizes inspection data, thus increasing the efficiency associated with these tasks. The web-based data management system includes a geospatial database to track wall locations, including the latitude and longitude of each wall.