News Archive
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March 4, 2016

Media Contact

Andrew Barth, 303-441-1032

Update on road construction around Boulder County

Hello Boulder County Transportation Listserv Subscriber -

This email provides information on current and upcoming construction around Boulder County that may impact your travels.

Current Construction

Lefthand Canyon - Full closures and delays

Flood recovery-related permanent construction in Lefthand Canyon is moving along well and is currently on schedule. Phase I travel restrictions will remain in place until Memorial Day. This includes daily road closures between Olde Stage Road and James Canyon Drive from 8 a.m. to 4 p.m. with 30-minute delays in effect between 7 a.m. and 8 a.m. and 4 p.m. and 5 p.m., Monday through Friday. On Saturdays, the road opens every 30-minutes for vehicles to pass in both directions between the hours of 7 a.m. and 5 p.m., and no closures or delays are in place on Sundays. Working hours may be extended as daylight increases. Complete project information is available at

Salina Junction in Fourmile Canyon - Lane closures

Work to install a 110' long x 8' wide x 8' tall box culvert at Salina Junction is also progressing nicely and the contractor is anticipating an on-time completion in May. Traffic is currently being controlled by stop lights 24-hours a day/seven days a week and this system will remain in place until it is safe to pass cars in all directions. Visit the project website for more information.

St. Vrain Road - Full closure

St. Vrain Road west of Longmont is currently closed between Crane Hollow Road and North 65th Street so that Road Maintenance can safely install a new culvert at James Ditch. The closure will be in effect 24/7 until April.

Beginning Next Week

Geer Canyon Drive - Lane closures

Flood recovery-related permanent construction and stream restoration work in Geer Canyon will begin on Monday, March 7. Work will require that Geer Canyon Drive be reduced to one lane to safely accommodate construction. Flaggers and traffic control devices will be used to safely move travelers around the construction zone. Access to Heil Valley Ranch will be maintained. Boulder County Parks & Open Space are anticipating conducting a prescribed burn at Heil between March 13 and March 26, weather permitting. This activity will require that Heil Valley Ranch be closed to the public in order to safely conduct the operation. Updates on the prescribed fire work are available on the Parks & Open Space website.

N. 83rd Street - Full Closure for Bridge Construction

Beginning Wednesday, March 9, North 83rd Street will be closed 24/7 so that flood recovery-related permanent construction of a bridge can take place over the Little Thompson River. Detours will be established at Woodland Road on the south and Larimer County Road 4 on the north. This project and the road closure is anticipated to last until October 2016. Additional details are available on the project website.

Longmont Dam Road - Lane closures

Flood recovery-related permanent construction of Longmont Dam Road and North St. Vrain Creek stream restoration is anticipated to begin the week of March 7. The project will require that Longmont Dam Road be reduced to one-lane at various times throughout the project. Traffic control personnel will be used to move travelers safely around the construction zone. This work is anticipated to last through May, weather permitting. Additional details are available on the project website.

Coming in March

South Boulder Road

Crews are anticipated to return to South Boulder Road near South 68th Street the week of March 14 to continue work on a median repair project. Expect lane shifts and potential lane closures. Exact details are being determined now and more information will be posted on as it is finalized.

Information about all of these projects and other non-county road projects is available at

If you have any questions or comments about any of these projects or any work on Boulder County roads, please contact me.

Thank you for your time. Have a good weekend.


Andrew Barth
Boulder County Transportation