With over 500 views I will make my requested answers here.
1. Bennett Air Transport, starting in winter of 1932.
2. A.A. Bennett.
3. Zenith Z6A cabin biplane.
4. Pratt & Whitney R-985 Wasp Jr. 420 Hp.
5. Boise, Idaho and Atlanta, Idaho.
6. 65 miles.
7. The route was over treacherous mountains with absolutely no place to land in-between. The elevation of Atlanta's landing strip is 5,500' and is a recommended one-way strip. Landing only on Rwy 34 and takeoff only on Rwy 16. Approach up Boise River; departure with right turn out down Boise River. Rwy unpaved and reported 60' wide by 2,460' long. Additionally, the Zenith Z6A is a single engine open cockpit airplane with only a windscreen for the single pilot's protection year-around. Think of the Wind Chill factor!
The C.A.M. route served about 80 families who worked a gold and silver mine. Bennett hauled in all sorts of other supplies besides the US Mail. Only 7 Zenith Z6As were built and Bennett purchased two of them in 1929. Wingspan was 41 feet with a cabin for four under the upper wing with glass windows on each side. The taildragger with uncowled engine looked similar to the Boeing B 40-C biplane , but had a balanced rudder. The cabin had four seats with a table, and Bennett probably stowed the mail in here.
The Zenith Aircraft Company built only 7 Zenith Z6s, but also built farm equipment such as threshing machines. Only one Zenith Z6A survives, restored by John Mullen and Brian Collins. There was another one flying in Alaska, but after landing on a frozen lake, the crew departed to eat and heard the ice cracking behind them-the plane went down and is at the bottom of a 500 foot deep lake, presumably still there. Air & Space Smithsonian magazine has an article on the sole remaining Zenith Z6A restoration in the March 2007 issue.
Today, about 40 people live in the township of Atlanta, Idaho in Elmore County. There is a move afoot to start up mining again, but the residents are against it. Main businesses are resort and convention center businesses. Two US Forestry Service strips also now serve Atlanta. Graham USFS strip U45 at elevation 5,726' is 11 miles NW and Weatherby USFS 52U at elevation 4,494' is 9 miles NW of Atlanta 55H. An unimproved road serves Atlanta and is about a 3 and a half hour drive when passable from Boise. All these strips are recommended for experienced mountain pilots only with high-performance (STOL) aircraft. All this makes Bennett's early C.A.M. flights all the more remarkable. I appreciate all who attempted to answer this quiz. Thanls for your participation!
I am remiss in not crediting Glenn Peck also in the restoration of the sole remaining Zenith Z6A, and in telling you Bennett also hauled sheet metal, saws, pianos and cows to the miners in his Zenith Z6A