Officials in Nederland are advising that town's residents that it might be as long as a month before Boulder Canyon re-opens.

A Colorado Department of Transportation spokeswoman said Monday that engineers are still in the process of assessing damage and preparing estimates for road repair of several vital state highways serving mountain communities.

Amy Ford said she "could not begin to speculate" about how long it will be until Boulder Canyon is open again following last week's torrential flooding.

But Nederland Town Administrator Alisha Reis said officials there have been told by CDOT crews to expect repairs to the canyon to take a month. The town advised residents of the likely long wait in a post on its Facebook page.

"Maybe we jumped the gun a little, but that is what we were told," Reis said Monday. "We want people to be prepared to continue allowing extra time to get out of Nederland. In particular, we want people with sensitive medical conditions and ladies who are very pregnant to make plans for being close to a medical facility."

Nederland residents must take Colo. 119 to U.S. 6 through Black Hawk to reach the lowlands.

Ford said CDOT hopes to complete full damage reports for Boulder Canyon, U.S. 36, Colo. 72, Colo. 7 and U.S. 34 by the end of the week or early next week.

"Our priorities are focused on reconnecting the communities that have no access or only one way out of town, as well as providing access for electric and gas crews," Ford said. "We know that these are community priorities, and those are our focus right now."

Ford said CDOT wants to begin repairs as soon as possible.

"We know that time is not on our side," Ford said, referring to the possibility of snow and freezing temperatures within a few weeks in the mountains. "We want to make as many of these repairs as quickly as possible while still doing quality work."

Boulder's Office of Emergency Management on Monday stressed that Boulder Canyon is closed to all traffic -- vehicular, cyclist and pedestrian -- until further notice. Officials said the roadway and surrounding terrain has been deemed "extremely unstable and unsafe."