Big Bend Reservoir and Control Valve Station

The Tenth Avenue Reservoir is one of two supplies to the City’s Big Bend Zone.  The existing valve station at the reservoir controls supply to the reservoir and provides an emergency bypass.   The City’s goals for the project were chlorine residuals improvements, facility control, instrumentation and functionality upgrading, and addressing the accessibility and maintainability of the facility.

Options for rebuilding the existing chamber or replacing with a new chamber were developed, and costed by Water Street.  The assignment also included identifying measures to increase chlorine residuals throughout the pressure zone using water quality modelling.

The recommended solution included:

• Construction of a new valve chamber with an above grade electrical building,
• Improved low-flow bypass functionality,
• Instrumentation improvements,
• Adjustment of reservoir operating levels,
• Improvement to the reservoir inlet for tank mixing, and
• Control adjustments to the secondary supply to the zone.

Improvements to the facility have been implemented.