This collection relates to the career of Ernest J. Mauck, a postal clerk with the Highway Post Office (HPO) Division of the
Postal Transportation Service (PTS) on routes 19 and 20 between San Francisco and Redding.
In 1942, the United States Postal Service (USPS) responded to the discontinuance of some railroad routes by implementing a
Highway Post Office (HPO) along the same routes. Mail was sorted in a HPO bus instead of a railway post office car. HPO
service grew rapidly in the 1950s and 1960s. In September of 1967 the USPS began to rely more on air and truck transportation
for delivering mail. Most RPO and HPO routes were discontinued and the clerks reassigned.
Ernest J. Mauck began his career as a postal clerk on a Railway Post Office car. By the late 1950s, Mr. Mauck was working
as a postal clerk along a HPO route that followed a discontinued Southern Pacific RPO route between San Francisco and Redding.
Copyright has not been assigned to the California State Railroad Museum. All requests for permission to publish or quote from
manuscripts must be submitted in writing to the CSRM Archivist. Permission for publication is given on behalf of the CSRM
as the owner of the physical items and is not intended to include or imply permission of the copyright holder, which must
also be obtained by the reader.
This collection is open for research at our off-site storage facility with one week's notice. Contact Library & Archives staff
to arrange for access.