Movement at the Lake Naughton Slide, or the "Ten-Percenter" Hill. (COURTESY PHOTO / WYDOT)
WYDOT is continuing to work with contractor Knife River Corporation Northwest on resolving issues concerning last summer’s project on Wyoming Highway 233, Hams Fork Road. The work included grading, full depth reclamation, chip seal and miscellaneous work on 17.73 miles beginning at about road marker 2. Due to some issues with pot-holing and general surface deterioration, WYDOT has decided to let a separate contract for an overlay on the section.
WYDOT will be applying a one-inch leveling course on the full length of the project, from about milepost 2 to 20, and then following the leveling course with a two-inch top lift of plant mix.
“We have a set of final plans for the new overlay. It should be let to contract in April,” WYDOT Resident Engineer Jennifer Hoffman said.
The completion date for all paving items will be August 1, 2018. However, the planned overlay will not be addressing the two slide areas on the Hams Fork Road at mileposts 12.5 (City Dam Slide) and 16.7 (Lake Naughton Slide).
The City Dam Slide
The City Dam Slide on the Hams Fork Road at milepost 12.5 is a result of settlement of the roadway over the years. WYDOT maintenance crews have been addressing the movement with frequent patching jobs. WYDOT geologists are working on a potential fix that will include constructing a toe berm at the base of the slide on the west side of the road. This work will likely include a detour, or a one-way signal controlled traffic. This slide repair job will be let in September of 2018 and will likely be constructed in 2019.
The Lake Naughton Slide
This slide on the Hams Fork Road is located on the "Ten-Percenter" Hill. The settling of the roadway has resulted in a very uneven roadway surface. WYDOT is planning to remove some of the material on the slope to take weight off of the slide. Crews will then replace the road bed itself with layers of good gravel and geotextile fabric. Work will be done under traffic with daytime flaggers. This project is also in the September 2018 letting and will likely be constructed in 2019.
“Since the plans for the two slide repairs on WY 233 (Hams Fork Road) won’t be finished before the overlay is complete, we will put only a bare minimum amount of pavement on those areas in 2018,” Hoffman said.
However, WYDOT will be paving those slide areas with a full three inches of plant mix as part of the slide repair projects in 2019, to match the adjacent overlays that will be completed in 2018.
“Ideally we would have let all this work at the same time, to avoid this sort of doubling up, but since slides by nature are unexpected and usually require more design time, it wasn't an option,” Hoffman concluded.