As most of youz know, Grouse being found in SWPA, is a relative proposition. Any Grouse found in Washington/Greene counties, are VERY few and far between. Now, you head up to "the mountains" of SW PA, and you will find some pockets of Grouse.
As close as the early-mid 90's, we still had good to very good, to even excellent Grouse hunting in parts of Washington, and most of Greene counties. Dem's days are gone..... at least for the foreseeable future.