Forest Service

Forest documentation by Lyle Watts for a survey study probably on the Montana-Idaho border at Rock Flat showing snowy patches among tall trees. Back of photo reads, " 4/8/31 - Snow Recession 1 PM - Stop - 8-1/35 sec. note patch character of snow intermittent - Flat outside was complete cover."

Forest documentation by Lyle Watts for a survey study probably on the Montana-Idaho border at Rock Flat showing deep snow around trees. Reverse reads, "4/2/31- 9.40A. - West. Light Clouds. - 5.6 - 1/25 S.R.5 Idaho.- close focus to show winter appearance of plot."

A forester, perhaps Lyle Watts or another fellow forester, standing in a snowy forest in this photo documents forest for a survey study probably on the Montana-Idaho border at Rock Flat. The reverse of the photo reads, " 4/2/31 - 1130AM - 8-1/75 - West. Bright Sun. SR.3. corner 2. 1st of a series. Snow under advance growth OM."

Forest documentation by Lyle Watts for a survey study probably on the Montana-Idaho border at Rock Flat showing snowy field with tall trees at a distance. Back of photo reads, " 4/2/28 - 4PM - 8-1/75 north. Dull Sun. Rock Flat Survey Course."