The audit of Bridge Infrastructure Assessment was included on the City Council-approved fiscal year (FY) 2023/24 Audit Plan. The audit objective was to review processes and controls relating to bridge inspections, repair, maintenance, including follow-up on related recommendations from Audit No. 1905 issued in 2019.
We found that more than half of recent ADOT inspection reports have not been reviewed or uploaded and more effective monitoring of inspection results is needed. Since the 2019 audit, the department more actively reviews ADOT inspections results and recommended work. However, more effective monitoring practices are still needed.
- Recent reports for about 130 structures were missing. Procedures needed to ensure inspections are received and reviewed.
- Incomplete inventory led to a bridge going uninspected for nearly 30 years. Also, an inaccurate inventory impacts the department’s ability to effectively monitor inspection results.
- Work order status is not effectively monitored and follow-up on deferred work is needed.
- A culvert rated in poor condition needs attention.
Additionally, smaller bridges are at risk of expensive repairs or replacement due to a lack of an asset management program. Limited progress has been made in establishing an asset management program for non-NBIS bridges and culverts.
- Roles and responsibilities for these assets, which cross multiple city departments, need to be defined or formalized.
- Non-NBIS bridges have not been identified and inventoried; a plan for periodic assessments or inspections needs to be developed.