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August 23, 2017

James Canyon Flood Recovery Project Update

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Hello -

I hope all is well. Here are some updates to the flood recovery work currently taking place on James Canyon Drive and in and along James Creek.

The large retaining wall being built just uphill from the Lefthand Canyon Drive intersection is going well. Crews have formed the wall (see below) and have started to pour concrete. After the concrete is set, KTI will backfill the zone and pour a concrete slab on the top. After the slab has cured and has been inspected and improved, we'll reopen this stretch to two lanes. This will likely take a few more weeks to finish.

James Canyon Retaining wall 8

Starting tomorrow, KTI will begin building another large retaining wall around the large curve that sits just below the Jamestown limits. This means that another traffic signal will need to be installed in order for crews to safely complete the work. Delays will be similar in length as what is being seen at the other wall site. Exact signal timing will not be known until the zone is set. KTI will utilize traffic signals with an optic sensor again in order to keep waits as short as possible.

Road work continues to involve the installation of large reinforced concrete box culverts. The culvert at Jenks Gulch, below Jamestown, will be formed for headwalls and wingwalls this week and next. As soon as the forms are in, concrete will be delivered and poured to finish the structure.

Stream restoration activities are going very well, and work has expanded to reaches above Jamestown. Construction-quality materials are being delivered and unusable materials are being hauled out of restoration zones daily, so please use caution as large trucks are often entering and exiting the stream area. Flaggers will continue to be used to keep all travelers safe. A picture of stream restoration activities taking place below Jamestown is included below. Notice the row of large boulders placed in the ground. This rock alignment, known as a "boulder toe," will act as a barrier between the stream and the road during high flows and should help prevent the water from eroding the nearby edge of the road.

James Creek restoration activity

Please take the addition of the second traffic signal into account when making plans for travel. We'll do our best to keep delays outside of the traffic signal areas to a minimum, but you may run into a few spots requiring you to wait a few minutes.

Thank you for your time, patience, and understanding. Please do not hesitate to reach out to me with questions, comments, or concerns.

Have a good day.



Andrew Barth
Boulder County Transportation