2024.11.04 CC Packet - Laserfiche WebLink

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City of Hugo 10/21/2024 Page 3 Summary of Field Exploration: The 14 cores obtained is this area had bituminous depths ranging from 2 inches to 6 inches, with a wear or top lift ranging from not present to 2.5 inches, and a base layer ranging from 2 inches to 3.5 inches. Cores 6-14 appeared to be paved in 1 lift of material. The condition of each core and it’s apparent lifts of asphalt were classified based on condition, and the condition of the cores and lifts ranged from poor to fair condition with poor cores exhibiting excessive raveling and cracking and all locations indicating some amount of raveling. The aggregate base appeared to be sand with various amounts of gravel, brown or light brown in color, and ranged in depths from 3 inches to 18 inches. #200 washes were performed subase material and included in the field notes. The subbase in general was identified as fine-medium grained sand, brown or reddish brown in color. The pavement in the Project Area exhibited various amounts of alligator cracking, patching, surface stripping and transverse and longitudinal cracking throughout. Refer to field notes for more detailed distresses for each sample location. Our Field Data is further detailed in the Appendix. Recommendations for Rehabilitation: Based on the conditions of the existing bituminous and subsurface data gathered by WSB, we concur with the recommendations proposed by the City for full depth reconstruction. This would entail of the complete removal and disposal of the existing bituminous pavements. The underlying base should be compacted, shaped and test rolled immediately prior to bituminous paving. Key Considerations: The import or export of any excess base aggregates associated with the recommended rehabilitation techniques should be considered. The quantity will be highly dependent on designed profiles and structure limitations such as utility structures and any adjacent driveway tie in elevations. Any unstable base soils discovered during a test roll would likely require sub cutting and replacement. Potential costs associated with these corrections should be anticipated. Pavement Design: The new bituminous pavement section and pavement mix type should be designed and specified by a Civil Engineer in consideration of the loads, climate, desired life expectancy and other key factors. If requested, WSB can provide a pavement design for this project.