The 9th Street Sewer Replacement project includes the construction of approx.. 2,226 linear 60-inch diameter combined sewer system (CSS) pipeline from G Street to L Street replacing deteriorated portions of the CSS and adding in-line storage to reduce flooding in surrounding and upstream portions of the CSS. This project is a part of the Downtown Sewer Upsizing Program (DSUP) and when completed, will help to reduce flooding of the combined sewer system (CSS) in the Downtown Area of Sacramento.

Our scope of services included geotechnical support and construction observation and material testing during trench backfill operations and sewer/storm drain installation. In addition, we also provided material testing during subgrade/aggregate base and paving operations.