The San Germán Underground (
Spanish: ''Túneles subterráneos de San Germán'') is a vaulted brick storm sewer system built in 1835 underneath the urban center of
San Germán, Puerto Rico
San Germán (, ) is a historic town and municipality located in the Sabana Grande Valley of southwestern region of Puerto Rico, south of Mayagüez and Maricao, north of Lajas, east of Hormigueros and Cabo Rojo, and west of Sabana Grande. San ...
. The system is made of a central tunnel and several smaller side tunnels. The construction is of
brick and rubble
Core-and-veneer, brick and rubble, wall and rubble, ashlar and rubble, and emplekton all refer to a building technique where two parallel walls are constructed and the core between them is filled with rubble or other infill, creating one thick wall ...
with modern concrete repairs. The main part of the system covers the underground course of
Quebrada Manzanares from its headwaters to its resurgence as a surface stream, away.
The vaulted brick branches, most of them abandoned and sealed, date mostly from before 1910. The tunnel sections built up to 1918 are listed on the
National Register of Historic Places
The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance or "great artistic v ...
as Alcantarilla Pluvial sobre la Quebrada Manzanares.
See also
*
San Germán Historic District
The San Germán Historic District is a historic district located in the western section of the town of San Germán, Puerto Rico. The district was added to the National Register of Historic Places in 1994. The district contains more than 100 sign ...
Notes
References
External links
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Los TunelesInformation from the city of San Germán (Spanish)
Tunnels completed in 1835
Infrastructure on the National Register of Historic Places in Puerto Rico
Buildings and structures in San Germán, Puerto Rico
Tunnels in Puerto Rico
Historic district contributing properties in Puerto Rico
1835 establishments in Puerto Rico
Sewerage infrastructure on the National Register of Historic Places
Infrastructure completed in 1835
Tunnels on the National Register of Historic Places
Water supply and sanitation in Puerto Rico
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