Description:
Yuma County was one of the earliest important mineral·producing areas in
Arizona . Numerous large and small mining and placer operations were active,
and almost all the more important mineral deposits of precious and base
metals in the county were first found and prospected during the second half of
the 19th century . The records of most of those early mining activities are
scanty and scattered in old documents and records, publications by individuals
or Federal and State agencies , articles in technical journals, public and
private reports , and newspaper clippings. Even si nce 1900, the mining
records are far from complete and are not readily available to persons needing
or seeking such information. Thus this index is designed to provide, in a
concise form, a summary of the available information on most of the mining
properties in the county and the more important sources of information that
may be found concerning those properties.