CASE STUDY
Stitt Road
Beaver County, Pennsylvania
Project Number 16023
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Stitt Road
Beaver County, Pennsylvania
BEFORE
Existing Conditions
A 10-inch natural gas pipeline crosses a tributary to Dilworth Run in Beaver County, Pennsylvania in a 25-foot wide right-of-way. The soil is composed of clay with rock in the channel bed and well-vegetated banks. A 6-inch abandoned pipeline is located downstream and a 4-inch drainage line is located upstream of the 10-inch pipeline. Headcutting in the stream has left shallow cover over the pipeline and exposed the abandoned pipeline for 16 feet.
AFTER
Solution
The site was dewatered using sandbag dams and pumps. The existing river weights were buried. Both banks and the streambed were graded, and a geotextile material was placed on top of the grade.
A Submar articulating concrete mat system was installed from high bank to high bank to armor the pipeline. All edges of the mat system were toed into anchor and flank trenches that were backfilled with existing material and rip rap. A subgrade rock grade control was installed downstream of the mat system to prevent headcutting. Geotextile and rock were installed on the banks for bank paving. After final grading was performed, erosion control blanket, seed, and straw were placed on the disturbed areas.
Project details
PROJECT #
16023
PROJECT Name
Stitt Road
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