Oroville – The state Department of Water Resources has filed a request with the Federal Energy Commission to demolish and reconstruct an additional 240 feet of the main Oroville Dam spillway upper chute this season. The purpose of the change is to ensure the reconstruction can be complete in two seasons, per a recent FERC filing. Kiewit, the contractor, said demolition “must commence as soon as possible” to stay on schedule, according to the letter. Erin Mellon with the California Natural Resources Agency said DWR expects to be granted permission in the next several days.