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12 • The second Olivert•Sine entrance is currently barely visible with only a Sew timbers and reddened sandstone around the portal belying its existence. The tunnel has been completely closed, and vegetation has grown over the sealed opening. The remains of the mill consist of a concrete slab with various metal hardware scattered about. The distribution of the metal fragments, generally a scatter with small piles of debris throughout, indicates that the area has been thoroughly explored by relic hunters or salvagers. Structural remains similar to those Sound on the north side of the river occur throughout the Sloodplain. The one structure that remains relatively intact is a log "powder house", located just east of the mine portal (Plate IIb). The small, east-facing building is constructed of sawed logs secured with round nails. The roof apparently consisted of poles laid across the top of the structure. Dimen- sions of the building are approxiaately two (L) by two (W) by one and a half (H) meters. The remains of the railroad connection to the operation are scattered through- out the aria. Generally, the track parallels the river, and a short section remains intact ,just east of the mill ra:iains. 5ereral coal wagons used to be located in this area, but have been removed (Tom Hurst, personal co:amunication). A prehistoric locality was discovered on U. S. Steel property east of the structural remains associated with the Oliver Power Plant. Four flakes were en- countered in the two track roadbed that Darallels the south side oT the North Fork just above the stream bed. Three of the flakes are extremely Iow grade white chert peroussion flakes; the fourth is a red, white, and black mottled chert percussion flake with shear retouch along the distal edge. The items were not collected. This material is confined to the sandy road surface, which has eroded to a level approximately six centimeters beneath the present ground surface. Intensive irnestigation of the surrounding area revelaed no other materials, even though the undisturbed areas adjacent to the road allowed fifty percent plus ground surface Visi': ility. The sandstone overhang located north of the Oliver Power Plant contained • no cultural remains. Though probably inhaoitsble, the flour slopes about three percent to the south, and is noror almost totally covered with roof fall.