All data is in BPA's custom Lambert projection as follows:

Projection LAMBERT CONFORMAL
Units FEET (U.S. Survey)
Spheroid CLARKE1866
1st standard parallel 42 20 0.000
2nd standard parallel 48 40 0.000
central meridian -117 0 0.00
latitude of projection's origin 41 0 0.000
false easting (meters) 914401.82880
false northing (meters) 0.00000


ESRI projection file:

PROJECTION LAMBERT
DATUM NAD27
UNITS FEET
PARAMETERS
42 20 00
48 40 00
-117 00 00
41 00 00
914401.8288
0.0