The Mountain Defense League Records represents the administrative records of the Mountain Defense League (MDL) for its three decades existence, and the work
of both Bryon Lindsley and Pandora Rose as former presidents of the MDL. The majority of the collection consists of records
from a variety of federal, state, and private organizations including legal documents, legislation, newsletters, annotated
maps, and publications. The MDL worked in conjunction with several federal agencies, most notably the Department of the Interior,
U.S. Department of Agriculture, U.S. Forest Service, and the Bureau of Land Management. The collection is divided into two
major series: Administrative Files and Environmental Research Files. The Administrative Files series is divided into five subseries: General Office Files, Correspondence, Legal Files, San Diego Environmental Review Board, and Sierra Club, San Diego Chapter. The Environmental Research Files series is divided into five sub-series: Local Environmental Projects, General Plans, National Forests, Soil Surveys, and Publications.
The Mountain Defense League (MDL) is a small non-profit organization that worked in San Diego County to preserve the natural
environment often threatened by developers. In particular, the fights against developers on Middle Peak, Mt. Laguna, and Palomar
Mountain were some of the MDL's most successful fights. The MDL was created in 1973 in direct response to action taken by
developers at Middle Peak in the Cuyamaca Mountains. The league was a small, grass roots organization in which members of
the local community had the opportunity to work together to protect San Diego County's natural landscapes. The founder and
director, Byron Lindsley Jr., understood the limited resources of the group, and helped the MDL to pick and choose different
areas and projects for its attention.
The copyright interests in some of these materials have been transferred to or belong to San Diego State University. The nature
of historical archival and manuscript collections means that copyright status may be difficult or even impossible to determine.
Copyright resides with the creators of materials contained in the collection or their heirs. Requests for permission to publish
must be submitted to the Head of Special Collections, San Diego State University, Library and Information Access. Permissions
is given on behalf of Special Collections as the owner of the physical item and is not intended to include or imply permission
of the copyright holder(s), which must also be obtained in order to publish. Materials from our collections are made available
for use in research, teaching, and private study. The user must assume full responsibility for any use of the materials, including
but not limited to, infringement of copyright and publication rights of reproduced materials.
This collection is open for research.