An historical archive of the year of the great flood.

From Boulder County:

Major debris hauling efforts and other construction work in progress

Boulder County, Colo. – Lefthand Canyon from U.S. 36 to James Canyon, and James Canyon to Balarat Road will be closed to cyclists 7 days per week until May 1 while crews remove major debris hazards from the area before spring runoff and continue road construction.

 What: Lefthand Canyon and James Canyon temporarily closed to cyclists 7 days per week

When: Beginning April 4

Who: Cyclists

Where: From U.S. 36 to James Canyon, and from James Canyon to Balarat Road

 In order to expedite the hazardous debris removal by a May 1 deadline, and to mitigate a safety risk, we are asking cyclists to respect the temporary restrictions. We are also asking motorists to avoid the canyons unless travel is necessary.

“Due to unsafe conditions on the roadways such as steep drop-offs along the roadways from washed-away ditches and washed-away roadway shoulders, plus the increased volumes of heavy construction and road maintenance equipment along compromised roadways, so we can remove debris before spring runoff, we ask that cyclists stay out of the canyons if possible,” said Transportation Director George Gerstle. “While these conditions are experienced by both motorists and bicyclists, bicyclists are much more likely to have their safety compromised.”

Residents who need to ride a bike on this area for basic transportation purposes can contact the Sheriff’s Office at 303-441-3650 for a permit.

“Once we want to thank everybody in advance for their cooperation so we can address the risk of spring runoff as quickly and safely as possible,” said Gerstle.

We want to remind all residents that while we are making progress on repairing the roads, and removing debris, we still have more to do (please refer to for updates).

For more information about this temporary closure, call the Transportation Department at 303-441-3900.

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