The Dolores Water Conservancy District board voted unanimously on Thursday to close Totten Lake to all boating to prevent contamination by non-native quagga and zebra mussels.
The mussels, which can damage irrigation infrastructure, are transported in boats that have been in infested waters, such as Lake Powell and Lake Mead.
The Totten closure follows a boating ban on Narraguinnep Reservoir, enacted last week by the privately owned Montezuma Valley Irrigation Co., which also cited the mussel threat.
“To prevent a mussel contamination, and to be consistent with MVIC’s decision, the board voted to prohibit all boating on Totten,” said DWCD general manager Mike Preston.
The boating ban on the two lakes is for all non-motorized and motorized, and includes kayaks, canoes, stand-up boards, windsurfers, oar boats, rafts and jet-skis. Fishing at the popular lake will be allowed from the shore.
“There was a lot of debate on our board about possible exceptions, but the board decided that to be clear, and best protect our irrigators, the ban will be to all boating,” said MVIC manager Brandon Johnson.
A boating closure order for Totten is being drawn up in cooperation with the Colorado Parks and Wildlife, which manages the fishery. A locked gate on the boat ramp will be installed soon. Narraguinnep already has a locked gate installed. Violators at Totten and Narraguinnep will be issued tickets by Parks and Wildlife and the Montezuma County Sheriff’s Office.
Boat inspection stations are effective at preventing a mussel contamination in lakes. But there is no funding for inspection stations at Totten or Narraguinnep, so managers say their only other option is to close them to boating because the contamination risk is too great.
The Dolores Water Conservancy District is also tightening up boating access on McPhee this year to better prevent the mussels from entering the regional irrigation reservoir.
Boating is still allowed at McPhee because there is funding for boat inspections. But access for motorized and trailered watercraft is only allowed during the season through two boat inspection stations at the McPhee and House Creek boat ramps.
When the stations are closed, newly installed locked gates will prevent lake access. In the past, boats could still launch when the inspection stations were closed.
To accommodate boaters who return to the ramps after the boat stations are locked, one-way spike strips will be installed this season to allow boaters to exit the lake after hours.
“We made that concession to prevent boaters from becoming stranded on the lake,” said McPhee engineer Ken Curtis.
McPhee managers adopted the state standard for preventing the mussel that requires trailered and motorized boats to be inspected, but allows non-motorized, hand-launched craft to enter the lake anywhere without inspection.
In general, non-motorized kayaks, canoes, rowboats, stand-up boards, and windsurfers pose less of a risk or contaminating a waterway with mussels.
However, mussels on a boat from an infected lake can be transported to another waterway.
All boats and their motors should be cleaned, drained and dried before entering a waterway and after leaving a waterway.
MVIC also owns Groundhog Reservoir, and is considering closing it to boating. A decision is expected soon.