The forecast for a rainy weekend and the possibility of rising water levels has prompted precautionary measures across Boulder County.

In Longmont, the city’s Park Operations department announced Friday that it closed number of underpasses. Additionally, the Boulder County Sheriff’s Office announced that the St. Vrain Creek and River will be closed to tubing until authorities deem water has receded to a safe level.

The following Longmont underpass locations will be closed through Sunday:

Spring Gulch #2 — 17th Avenue and Ute Creek Drive

St. Vrain Greenway at Airport Road

St. Vrain Greenway at Hover Street

St. Vrain Greenway at Boston Avenue

St. Vrain Greenway at Price Road

Dry Creek Greenway at Grandview Meadows Drive

Dry Creek Greenway at Airport Road

Dry Creek Greenway at Hover Road

Left Hand Greenway at Pike Road

Left Hand Greenway at South Pratt Parkway

Left Hand Greenway at Main Street

Left Hand Greenway at Ken Pratt Boulevard

Staff will inspect the underpasses Monday morning to see if they can be reopened. Park operations will have staff on call for the weekend for any issues that arise. For more information, call 303-651-8404.

The decision to shut down the St. Vrain River and Creek to tubing was made Friday by Boulder County Sheriff Joe Pelle, after consultation with the town of Lyons and the Lyons Fire Protection District.

The closure took effect Friday, and will encompass the north and south Saint Vrain Creek and the Saint Vrain River from the western county line through the entire length of Boulder County. Sheriff’s deputies posted notices, advising recreationists of the closure, which prohibits single-chamber rafts, single-chamber belly boats and inner tubes.

There is a specific exemption for kayaks and white water canoes, which are permitted. However, officials warned kayakers are strongly encouraged to exercise caution and wear personal protection equipment including life jackets.

The sheriff is authorized to close waterways under Colorado Revised Statute 33-13-111. Violations of the closure are a Class 2 petty offense and can result in a $50 fine.

Even when the clouds clear, there could still be cause for caution. The high snowpack in the South Platte River Basin is expected to melt quickly with high temperatures forecast next week . As of Friday, the St. Vrain River was flowing at approximately 1,000 cubic-feet per second. The threshold at which tubing is banned on the St. Vrain is 1,200 cubic-feet per second. Authorities said they expect that threshold to be exceeded as snowpack melts next week.

For more information,visit BoulderSheriff.org.