A section of Highway T15 that crosses over the Red Rock Dam is still on schedule to be closed to all traffic this week. The county highway will be closed for 10 to 12 weeks starting Thursday. The road closure is necessary while crews construct a large subsurface wall that will be tied into the existing dam structure. A detour route will be established and signage will be in place to direct traffic in the area. Missouri River Energy Services would also like remind people that the North Tailwater Area at Lake Red Rock will remain closed for the duration of the project.