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Old Salt Lake | Virtual Museum

Exhibit 49


[ Page updated: March 15, 2021 ]


Virtual Restoration of the Study Area


This exhibit features selected screenshots from the interactive map at caltsheets.org. The caltsheets.org web site uniquely displays nineteenth century U.S. Coast Survey T-sheets of the Southern California Coast and more. Go to the web site, read the introduction on the home page, look around the site, read the reports, download a copy of the maps and get familiar with how to use the interactive map.

The screenshots presented below are instances of the 1871 U.S. Coast Survey T-sheet titled "Part of the Bahia Ona Point St Vincent Northwards" (T-1231, A W Chase: Surveyor). The caltsheets.org interactive map overlays the 1871 T-sheet on a current map or imagery of the same area. The user can adjust the opacity of the T-sheet to show exactly where a physical feature was then is now. The user can hover their cursor over a spot on the map and it will indicate the longitude and latitude coordinates of the spot. The result is enabling people to, in effect, virtually restore the Southern California coast to its original condition. The following selected instances of the restoration treament are of places within this virtual museum's study area: the Pebble Beach/Sand Dune/Old Salt Lake site, the Malaga Cove (CA-LAN-138) and Malaga Cove II archaeological excavation sites and Malaga Canyon's western terminus at the seashore.



[Figure 1]




[Figure 2]



[Figure 3]


Zooming in on the Pebble Beach, Sand Dune and Salt Lake site. The longitude and latitude coordinates displayed (Longitude: -118.39418, Latitude: 33.85098) is roughly the center of salt lake. Also note by checking the Feature box under Estuarine Habitats with the various habitats color-coded -- the corresponding habitat on the 1871 map gets colored in. Opacity adjusted to 50%.


[Figure 4]


Zooming in on the Salt Lake north point at low opacity.


[Figure 5]


The Salt Lake southwest point at low opacity.


[Figure 6]


The Pebble Beach, Sand Dune and Salt Lake site is virtually restored. The longitude and latitude coordinates displayed (Longitude: -118.39298, Latitude: 33.84948) is the center of salt works building - the rectangular structure drawn with a cross in the center next to the southeast edge of the salt lake, So, the salt works building was where the north inside edge of the former oil storage tank basin 4 is today. Opacity adjusted to 100%.


[Figure 7]


Zooming in on the Malaga Cove (CA-LAN-138) and Malaga Cove II archaeological excavation sites. Opacity at 50%.


[Figure 8]


The Malaga Cove (CA-LAN-138) and Malaga Cove II archaeological excavation sites are virtually restored. Opacity at 100%.


[Figure 9]


Zooming in on the water exit point of Malaga Canyon's western terminus at the seashore with low opacity. Note: the current water exit point is north of the beach club because the entire end of the northern finger of Malaga Canyon was removed for the beach club construction and the canyon water exit point to the ocean was diverted north.


[Figure 10]


Malaga Canyon's western terminus at the seashore with opacity at 50%.


[Figure 11]


Malaga Canyon's western terminus at the seashore is virtually restored. Opacity at 100%.


[Figure 12]


This exhibit concludes with an open-ended question about the wetlands reports on the caltsheets.org web site. How is the Old Salt Lake site an exception to what is discussed in the reports?