Project Profile: Pipeline Control Vault Installation
City of Louisville, Colorado
Overall the increase in flexibility that the control vault and the associated work will provide is vital to greater efficiencies in managing water supply operations, according to the summary.
CGRS couldn’t begin installing the pipeline control vault until winter set in because that’s when water use is lowest and the impact of shutting down the water line is minimal.
The job entails:
- Excavating approximately 500 cubic yards of soil to create a 10-foot-deep hole;
- Removing approximately 200 linear feet of existing pipe;
- Installing a vault that is 17 feet long by 13 feet wide by 7 feet deep (essentially a giant basement);
- Putting in control valves, a control panel and a water meter to track how much water goes to each plant;
- Connecting control valves and new 16-inch diameter pipe to the existing water line;
- Backfilling around and over the vault;
- Installing flow meters, electronic valves and sensors;
- Fencing the vault entrance; and
- Reseeding the affected area, which is in an easement owned by the City of Louisville within Boulder Open space.
The job hit a detour when the subcontractor that was to provide the precast vault was unable to fulfill its obligation. CGRS had provided for casting the vault in place in its bid for such a situation and identified the necessary subcontractor. Allowing the walls alone to curate or solidify can take 28 days, delaying completion, but CGRS will wrap up the project long before the City of Louisville needs the water flowing again.