LINCOLN, Neb. – Electricity to Niobrara State Park will be shut off from 1-5 p.m. on June 4 so the Nebraska Public Power District can work on a substation near Lynch. The park’s pool will be closed all day and the cabins and RV campground will be without power. Power will be off from Lynch east to the Niobrara River. The park’s pool should be open by June 10.