Pictures 7 Puget Sound Power & Light Company, White River Hydroelectric Project, Dieringer Washington Tweet Flume, just west of lumber storage shed, looking west from south side of the flume (1989). Concrete arch culvert constructed by Puget Sound Construction Company, 1911, for the Northern Pacific Railroad, over flume (1989) Wolslegal Basin from State Route 410 bridge, looking west (1989) Wolslegal Basin where it is crossed by State Route 410 bridge, looking east (1989) View of 6' valve for draining Wolslegal Basin, looking south from north side of the basin (1989) Sluice for 6' valve on north side of Wolslegal Basin, looking north (1989)