Status: Completed
Cost: $8 million included DWSRF and USDA funds.
Description: Scope of work included planning, design, permitting, funding administration, contract administration, and construction management. This was a very innovative and successful project, with the purpose of converting the City’s water supply from a gravity system with elevated tanks to a closed pumping system, without disrupting water service, and increasing the CT while reducing the amount of chlorine in the distribution system. The project consisted of:
- Upgrading the raw water pumps at the Nooksack River and installing an emergency power supply.
- Constructing a 6-million gallon welded steel storage tank including a cathodic protection system and a dedicated fill line from the nearby treatment plant.
- Complete rehabilitation of an existing 3-million gallon welded steel water tank including a cathodic protection system and 1-mile of 16” dedicated fill line from the treatment plant.
- Installation of D.I. 16”, 18” and 24” piping and fittings at the water treatment and Booster pump station.
- Installing four new pumps at the water treatment plant to fill the two reservoirs from the clearwell.
- Constructing a 7,000 gpm booster pump station with variable frequency drives and auxiliary chlorination system at the 6-million gallon tank.
- Constructing a 4,000 gpm booster pump station with variable frequency drives, auxiliary chlorination system and emergency power supply at the 3-million gallon tank.
- Modifications to the existing water treatment plant, including new filter controls chemical feed system and emergency power supply.
- Modifying water treatment plant piping to work with the new pumping system and convert from the old gravity tank system to the new system.
- Modifying the distribution system to provide change over the water transmission lines from the old gravity tanks to the new pumping plants. This included several thousand feet of 12” – 24” ductile iron pipe.
- Installing a complete SCADA system linking all components with fiber optic and backup radio controls.
- Decommissioning and removal of two old elevated water tanks located at the middle school grounds.
- Developing the CT reporting system on an excel spreadsheet.