Boat launches to re-open on May 1

Boat launches at foothill reservoirs continued to be closed to motorized watercraft as a precaution to prevent the spread of the highly invasive golden mussel. These bivalves pose a real risk to NID infrastructure if introduced into local waters.

NID will implement a new tagging program that requires all motorized watercraft to pass a 30-day quarantine or be decontaminated prior to entry into Rollins and Scotts Flat reservoirs.

The way it works: motorized watercraft can come to Scotts Flat or Rollis, and a quarantine seal will be applied for 30 days. During that time a vessel will not be permitted to launch. After the quarantine, the seal will be removed by authorized staff, and the vessel can return to the water.

When exiting the water, boaters will be offered a re-entry seal and receipt, which will allow the boat access to Rollins or Scotts Flat without an additional quarantine.

“The boat launches are set to open May 1, 2025 to motorized watercraft. Our goal is to start tagging boats the week of March 17,” said Monica Reyes, Director of Recreation. “Thank you in advance for cooperating with our inspection and decontamination process. By working together, we can prevent the introduction of this highly damaging mussel to our waters.”

Mature golden mussels were found at the Port of Stockton in October 2024, and State officials called the situation a "significant immediate threat." Once present, infestation can quickly cause devastating damage. The mussels form colonies on hard surfaces, impeding water flow, clogging pipes, and ruining watercraft motors.  

“We understand the impact this has to recreation, but protecting the reservoirs’ long-term health is our top priority. By taking protective measures now, we can prevent costly and irreversible damage to our ecosystem and water infrastructure,” Reyes said.

Specifics of NID’s new tagging program will be released in the next couple of weeks. Check NID’s Recreation webpage for updates.