I have noticed that most pre-1900 BM's along the coast of California were Monumented by burying 1 or more glass bottles 6" to 3 ft underground. Question #1 is, How were these Stations used? Many of these "BM's" were later recovered and a Disk was placed directly above the bottle(s) and the original Monumented date was stamped on the Disk. So, my second question is: If I recover a Disk with the original Monumented date stamped on it (with no RESET stamping), can I log it as Found using the original Monumented date?
an observation on pre-1900 BM's
in Benchmarking
Posted
I have noticed that most pre-1900 BM's along the coast of California were Monumented by burying 1 or more glass bottles 6" to 3 ft underground. Question #1 is, How were these Stations used? Many of these "BM's" were later recovered and a Disk was placed directly above the bottle(s) and the original Monumented date was stamped on the Disk. So, my second question is: If I recover a Disk with the original Monumented date stamped on it (with no RESET stamping), can I log it as Found using the original Monumented date?