The Isintok Lake recreation site will be closed to the public from July to November for the construction of the Isintok Dam Spillway Upgrade project.  The project includes replacement of the existing concrete spillway structure, excavation to widen the spillway channel, culvert replacement through the access road with a single span bridge, installation of riprap in the modified section of the spillway channel and at bridge abutments, and installation of a remote monitoring system to monitor the reservoir level, dam outflows, precipitation, wind, and temperature.