2026-10 Construction Update

This past construction season, MCWD tackled many smaller projects, largely out of public view. The status of current and past projects is:

Contracted Projects - Managed by MCWD Staff

• Roof replacements: Roofs were replaced on three buildings at MCWD wastewater plant. The project is complete.
• Wastewater Treatment Plant Upgrades: Repairing and/or replacing several major components of aging infrastructure. This project is currently out to bid with work anticipated later this fall.
• T-2 Water Tank Rehabilitation: A protective interior coating and installing structural reinforcements were applied to the 500,000 gallon tank to extend the life of the asset. This project is complete.
• Asphalt Slurry Seal at MCWD Main Campus: A slurry seal was applied to protect and extend the useful life of the recently paved campus. This project is complete.
• Sewer Rehabilitation Projects: Annually, the District targets sections of the extensive sewer system that need maintenance and repairs to extend the useful life of the system. The project focuses on manhole interiors, concrete collars on utility surface features, and lining sewer mains. These projects are now complete.
• Paving: Prior to winter each year, repairs are made to any pavement in the community impacted by District operations and projects. This will be done in late October.

In-House Projects

• New Fire Hydrants: Consistent with the District’s Strategic Plan, several new hydrants were installed around the community along the Urban Wildland Interface to help protect the community in the event of a wildfire. The installation of a final hydrant is pending.
• Zone 5 Connector: This project started in late September and is scheduled for completion in November. Staff are installing a water pipeline to connect Mammoth RV Park to Commerce Circle.  This is to ensure water delivery to the eastern portion of town in event of an emergency by creating a redundant connection. It will also improve fire flow and water quality.
• Digital Mapping of Infrastructure: This is a multi-year effort to improve digital accuracy of District resources. Staff are using recently upgraded GPS and GIS technology to digitally map resources that may need to be located while under the snow during winter.  This data collection provides a highly accurate digital resource that replaces outdated technology and paper maps. The bulk of this project has been completed. Staff will wrap it up next summer.
• TOML Support: MCWD staff relocated multiple pieces of conflicting infrastructure ahead of the Town of Mammoth Lakes Minaret Multi-Use Path construction project. Complete
• Monitoring Wells: Staff completed work that was started by contractors last fall. This work was unable to be completed last year due to low groundwater levels.
• Groundwater Treatment Plant Backup Power: An emergency backup power source was installed at one of the groundwater treatment plants. This is to ensure the plant can provide clean drinking water to the community in the event of a prolonged power outage.
• Ongoing Maintenance Projects: The District’s three specialized maintenance departments continually tackle a large volume of small projects throughout the community during the summer season.
  • Hydrant repairs
  • Water valve repairs
  • Air relief valve replacements
  • Water meter repairs and relocations
  • Sewer lift station upgrades (Lakes Basin)
  • Well upgrades