A river runs through bridge construction | PostIndependent.com

A river runs through bridge construction

Tom Newland

Hydraulic consultant AECOM’s model of both the north and south causeway in the Colorado River. The north causeway will be installed late July or early August, depending on river flows.
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The days are getting warmer, and we are seeing several boat trailers making their way to Colorado River put-ins. Crews have removed some of the south causeway rock, and will reuse it to build a smaller north causeway this summer on the north side of the Colorado River bank.

In addition to the north causeway, work to happen over the Colorado River includes: deconstructing the existing Grand Avenue bridge, setting steel for the new traffic bridge and pouring concrete this summer.

Each of these activities affects Colorado River put-ins upstream of the Grand Avenue bridge. Here’s what we know so far.

North Causeway Construction

Depending on the rate of the river’s flow, measured in cubic feet per second (cfs), crews will begin building the north causeway in early July or early August. The contractor anticipates the causeway construction will take approximately three weeks, and a spotter will be in the area monitoring boat traffic. Temporary holds are possible in the eddy east of the bridge.

Bridge Demolition

Crews will begin demolition of the Grand Avenue Bridge at 12:01 a.m. Monday, Aug. 14. During the demolition (approximately two weeks), Shoshone, Grizzly Creek and No-Name put-ins will be closed to private river trips. Permitted commercial guides with vehicle permits will be authorized to run double trips from Shoshone to Grizzly Creek during this time. The Shoshone (Exit 123) and Grizzly Creek (Exit 121) rest areas will be closed during this time. These closures are round-the-clock until deconstruction is complete.

Steel Girder Erection

At the end of August to early September, crews will begin setting the remaining steel tub girders over the Colorado River. The girder erection schedule requires approximately 10 continuous days of Colorado River put-in closures. Shoshone, Grizzly Creek and No Name put-ins will be closed to private river trips. Permitted commercial guides with vehicle permits will be authorized to run double trips from Shoshone to Grizzly Creek during this time. The Shoshone (Exit 123) and Grizzly Creek (Exit 121) rest areas will be closed during this time. These closures are round-the-clock until steel girders are set.

Concrete Deck Pours

Crews will pour the concrete deck for the Colorado River section in September or October. No river closures are anticipated, but a spotter will be located on the north causeway for safety.

Communication

Daily conference call briefings will begin in August at 3 p.m. Anyone can call in to listen to river and project updates. In addition, boaters can call or text the project hotline 970-618-9897. The voicemail will be updated daily during put-in closures. The project Facebook page will also be updated daily during closures.

Safety

Remember to stay river right approaching the Grand Avenue bridge. Crews will be working on both the north and south causeways. Be alert. Flaggers will be at the put-ins managing traffic. These Colorado River put-in closure periods are dependent on wind, weather and a dynamic construction schedule. Remember to call or text 970-618-9897 before you float.


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