Photographic Archive 1985 1990






The Marble Mountain Wilderness automatic photographic monitoring system was installed atop Marble Mountain in June 1985. The camera viewed Perch Creek Ridge to the southwest until the camera was stolen in October 1985. The site was reinstalled for the 1996 monitoring season and continued monitoring through September 1990. In 1991, the site was relocated to the Lake Mountain Lookout Tower, where it viewed Wild Lake until monitoring discontinued in September 1993. Wild Lake Vista photographs are not presented in this archive.

Photographs were taken at 09:00, 12:00 and 15:00 during summer and fall months from 1985 through 1988. Monitoring frequencies decreased to twice daily (9:00 and 15:00) beginning in 1989. Over 900 35mm color slides of the Perch Creek Ridge Vista were reviewed to develop the provided historical photographic archive.

Site-specific historical archive products include:

  • Site Specifications - detailed site location map, vista photograph, and site specifications describing the scene monitoring site.
  • Spectrum Frequencies - tabular visual range and cumulative frequency summaries for each range of visibility spectrum.
  • Image Gallery - select images representative of observed air quality conditions for the summarized scene monitoring site.

Also included is Air Program Information describing visibility measurements, causes of poor visibility, and Web addresses of related air quality data programs.


Site-specific products can be accessed from the blue links above or from the associated selections to the left. All graphic and text files have been archived in HTML format. To save or copy text to your hard drive, highlight the text/graphic of interest and right-click on the highlighted portion. Follow the detailed instruction menu. The site location map is available in both HTML and PDF format. To enlarge or view map details, select the PDF Zoom option at the bottom of the Site Location Map page.