At the stroke of midnight Saturday the Stanislaus River Parks are closing.Ranger Norm Winchester with the Army Corps of Engineers will be among personnel locking gates and switching off timers that would have reopened the locks six hours later at nine developed parks from Knights Ferry to the confluence of the Stanislaus and San Joaquin rivers west of Ripon and south of Manteca.It means an end to rafting for the duration. There are three rafting companies that operate daily out of Knights’ Ferry with weekend rafters averaging between 600 and 800 a day.The Sacramento District’s 10 recreation park units that also includes New Hogan Lake in Valley Springs stayed open by using temporary funds left over from the previous federal budget year that ended Sept. 30. The Corps is unique among federal agencies as it is funded by individual projects that carry over from year to year.