Collecting structure data in the field is complicated by a variety of limiting factors. Confined space entry can be dangerous and time consuming. Conventional methods have typically been relegated to visual observation from outside the structure. Various methods of inspection using cameras or robotic instrumentation are typically truck-mounted, meaning only spaces accessible to the vehicle can be reached. Even for those, the quality of data collected is not much more than grainy photographs or video footage, only slightly more useful than surface observation.

To overcome these limitations, GHA has embraced the latest technology. Our equipment enables us to safely reach any structure accessible on foot, up to a depth of 75’, and deliver data with accuracy far surpassing previous technology. The results can be available for immediate interpretation as well as long-term use.

Using the state-of-the-art CUES SPiDER manhole scanner, GHA staff evaluated manholes for Lake County Public Works, phased over multiple fiscal years, to easily accommodate existing budgeting. This was in accordance with the National Association of Sewer Service Companies (NASSCO) Manhole Assessment Certification Program (MACP). GHA also utilized survey-grade Global Positioning System (GPS) receivers to establish the rim and invert elevations of all the structures.

Our Pipeline Assessment Certification Program (PACP) certified technicians assessed the data and compiled the results into a report that presented a clear, concise summary along with the details for every structure.