A comprehensive, multi-phase condition assessment and rehabilitation planning program for approximately 2.6 km of storm sewer infrastructure across multiple sensitive environmental corridors in the City of Grande Prairie.
The City of Grande Prairie engaged Avodahtec to complete a comprehensive condition assessment and rehabilitation analysis of its storm sewer network.
The project includes approximately 2.6 km of storm sewer infrastructure with pipe diameters ranging from 300 mm to 2,100 mm, along with 25 associated manholes across multiple sensitive environmental corridors. The large diameter pipes show evidence of invert corrosion, joint separation, and bedding loss — issues that require detailed technical investigation to fully characterize.
The objective is to evaluate the structural integrity and long-term performance of the storm sewer system, identify corrosion and bedding-related risks, and develop data-driven rehabilitation recommendations to support the City’s capital planning program.
Pipe diameters: 300 mm – 2,100 mm
Multiple environmental corridors
Associated manholes across the full storm sewer network
CCTV, UT testing, hammer sounding
Soil corrosivity analysis (AWWA M27)
Large-diameter storm sewer infrastructure can be difficult to assess due to limited access, varying pipe materials, environmental constraints, and complex deterioration mechanisms including invert corrosion, joint separation, and bedding loss.
Evaluating invert corrosion, joint separation, deformation, and bedding loss across varying pipe materials and large diameters — including pipes up to 2,100 mm — while working within multiple sensitive environmental corridors and ravines.
Providing the City with technically defensible, actionable rehabilitation recommendations that balance structural performance, constructability, environmental impact, cost, and hydraulic constraints across diverse asset conditions.
Avodahtec is delivering a structured, multi-phase assessment and rehabilitation planning program:
Reviewed existing CCTV records from 2020–2021, as-built drawings, maintenance records, and available asset data to establish baseline conditions and identify data gaps across the storm sewer network.
Conducted field reviews to confirm access points, right-of-way constraints, environmental considerations, and inspection feasibility near corridors and ravines across the project area.
Developed and coordinated advanced inspection and testing programs including LiDAR inspection for ovality and deformation, ultrasonic thickness testing, hammer sounding, concrete testing (Schmidt and spike tests), and soil sampling for external corrosion risk assessment per AWWA M27 and ASTM standards.
Evaluated storm sewer condition by quantifying invert corrosion, joint separation, deformation, bedding integrity, load-bearing capacity, and external corrosion exposure to develop a comprehensive structural assessment of each segment.
Assessed trenchless rehabilitation options including cured-in-place pipe (CIPP), centrifugally cast concrete pipe (CCCP), sliplining, and invert paving. Prioritized methods based on technical suitability, constructability, cost, hydraulic impact, environmental constraints, and long-term service life using a transparent multi-criteria evaluation framework.
Preparing technical reporting, geotagged GIS mapping, condition indices, and prioritized rehabilitation recommendations to support the City’s storm sewer capital planning program with clear, defensible guidance for future investment decisions.
Early integration of LiDAR, UT, and soil testing provides a complete, data-driven picture of the storm system’s condition — enabling the City to act before failures occur.
Rehabilitation options are prioritized using a transparent, criteria-based framework that balances technical feasibility, constructability, and cost — providing council with clear, justifiable investment guidance.
Early detection of corrosion and bedding loss enables timely intervention and prevents costly emergency failures, maximizing the long-term value of the City’s storm infrastructure investment.
The City receives geospatial mapping and condition indices to strengthen its long-term capital and asset management programs, with clear visual tools to support ongoing planning.
Regular coordination meetings, clear documentation, and open communication ensure alignment with City staff and smooth execution across all project phases.
Let’s explore how Avodahtec can protect your buried pipeline infrastructure.