A sewer line replacement project at Eproson Park near the stage and outdoor dance floor is now complete. The District contracted with Peterson Excavation in September to replace the approximate 250-foot stretch of 10-foot deep, 6-inch diameter sewer line for a total contract cost of $86,400.
The old line was vitrified clay pipe that was more than 50 years old. Since its original installation, it developed two signifigant sags (or bellies), making it difficult for wastewater to flow through the pipe. The old pipe was also highly susceptible to root intrusion and, over time, roots caused several significant offsets at the pipe joints, which are located every 3-4 feet in clay pipe. The combination of the line sags, roots and offsets caused frequent back-ups in the park.
The new line is 6-inch PVC, which is far less susceptible to sags, offsets and root intrusion. Construction of the project proved to be much more difficult than anticipated, due to the depth of the sewer line, high groundwater levels, the crossing of several degraded active culverts and instable soils. Despite these challenges, the project was completed successfully. Due to unforeseen conditions, the final project cost was $100,500.