Groundwater Basin Maps

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  1770 - Plano del Tondeadero o Surgidero de la Bahia y Puerto de Monterrey - situado por 36 grados y 40 minutos de latitud Norte

  A detailed survey by Miguel Constanzó of the Port of Monterrey in which he identifies landmarks and potential locations for anchoring ships, including: Point Pinos, sheltered anchorage (except from the north-northwest winds), the site for the Mission and Presidio de San Carlos, several lagoons and an estuary that was filled by the tide. This is one of at least four Constanzó maps or plans resulting from the Spanish exploration of the coastline of Alta California between 1769 and 1770.

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  1845 - Conceptual Land Use Patterns Circa 1845 Inferred by Diseños Submitted to Mexican Government, Salinas Valley and Vicinity [Draft 2017]

  Map depicting conceptual land use patterns circa 1845 as inferred by diseños submitted to the Mexican government in the Salinas Valley and surrounding vicinities.

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  1847 - Anchorage at Monterey Bay, California

  An 1847 survey conducted by personnel on the U.S. Razee Independence reflecting the water depths and conditions such as sand, rocks and kelp, a watering ravine, a wharf, lagoon and sand hills.

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  1851 - Point Pinos, Bay of Monterey, California

  The 1851 U.S. Coast survey of Point Pinos, Sketch J. No. 4, designated a proposed site for a lighthouse at the point and exhibited the range of visibility for the proposed light. The survey was made from the 1847 survey conducted by Lt. H. A. Wise of the U.S. Navy.

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  1852 - Harbor of Monterey Bay, California

  An 1852 map published by the U.S. Coast survey depicting the Harbor of Monterey and coastal area.

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  1852 - Reconnaissance of the Harbors of Santa Cruz, San Simeon, Coxo and San Luis Obispo

  An 1852 U.S. Coast survey depicting the reconnaissance of the harbors of Santa Cruz, San Simeon, Coxo and San Luis Obispo, including sailing directions.

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  1854 - Part of the Coast of California from Salinas River Southward, California

  The 1854 survey depicts the topography for approximately seven miles along the Monterey Bay from the Salinas River southward, including the river, streams, salt and fresh water ponds and roads.

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  1857 - Preliminary Chart of Monterey Bay, California.

  An 1857 preliminary survey of the Monterey Bay (Monterey Quadrangle) providing sailing and anchorage information, as well as course and bearings, soundings, and tides.

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  1871 - San Simeon Bay and Vicinity, California

  A survey prepared by the Office of U.S. Coast Survey in 1871 reflecting the topography and landmarks surrounding the San Simeon Bay and vicinity.

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  1872 - San Luis Obispo Bay, California

  A survey prepared by the Office of U.S. Coast Survey in 1871 and 1872 reflecting the topography and landmarks surrounding the San Luis Obispo Bay. The map was subsequently updated in 1907 with handwritten notations, including that an article in the December 12, 1907 issue of the S.F. Chronicle reported the wharf for the oil port had been carried away.

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  1873 - Tracing of Topography South Point to Arroyo Grande Southward San Luis Obispo Bay, California

  An 1873 tracing reflecting the topography from South Point Arroyo Grande, southward, San Luis Obispo Bay. Additional notations about landmarks (railroad, piers, buildings) were added to the survey in 1883.

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  1876 - Coast between Monterey Bay and Point Sur, California

  An 1876 survey prepared by the Office of U.S. Coast Survey, reflecting the coastal region from Monterey Bay (south of Carmel Bay) to Point Sur.

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  1876 - San Luis Obispo Bay and Approaches, California

  An 1876 survey of the approaches to the San Luis Obispo Bay, including a Tides chart and a few landmarks such as buildings and piers.

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  1882 - Monterey Harbour, California

  The 1882 survey of Monterey Harbor, corrected the Aids to Navigation found on the 1852 Monterey Harbor map and extends up and around Point Pinos. Wharfs shown on the 1852 survey are not found on this map. Buildings and landmarks are identical to the 1852 survey indicating that the map was created for navigational purposes and not to reflect development along the Bay.

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  1889 - San Luis Obispo Bay and Port Harford

  The 1889 survey of San Luis Obispo Bay and Port Harford was based on surveys conducted as early as 1852. The map is focused on navigation of the bay listing the time and heights of the tides, latitude and longitude and location of bouys.

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  1897 - Arroyo Grande Quadrangle, San Luis Obispo County, California

  An 1897 U.S. Geological topographical survey depicting the Arroyo Grande Quadrangle in San Luis Obispo County, California, reflecting landmarks, lakes, creeks, ranchos, roads, railways, schools and communities.

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  1897 - Port Harford (Port San Luis), San Luis Obispo County, California

  An 1897 U.S. Geological topographical survey depicting the Port Harford in San Luis Obispo County, California, that reflected landmarks, creeks, ranchos, railways and roads.

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  1897 - San Luis Obispo Quadrangle Topographical Map, SLO County - USGS

  An 1897 U.S. Geological topographical survey depicting the San Luis Obispo Quadrangle, San Luis Obispo County, California, reflecting landmarks, Salinas River, creeks, ranchos, railways and roads.

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  1898 - Official Map of Monterey County, California

  Map prepared in 1898 by Lou G. Hare, County Surveyor, from public records, coast and geodetic surveys, government surveys of public lands and private surveys. Details include trails, roads, railroads, irrigation canals and county boundary.

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  1900 - Conceptual and Historical 1900 Land Use and Development in Salinas Valley and Vicinity [Draft]

  A digitized map created in 2017 representing land use and development in the Salinas Valley and vicinity in 1900. The map reflects private rancho; high probability of harming and Irrigation areas; land suitable for grazing cattle, sheep and horses with some agriculture; California native habitat (least developed lands); canals; railroads; pump houses, oil seep, population centers; 1898 USGS Monterey County Road & Historic El Camino Real; Salinas River Watershed; Township and Range; County boundary; historic Mission sites; springs; wetland, sloughs and lakes; intermittent stream or slough; Salinas River; as well as rivers and streams. Data sources include Bureau of Land Management General Office Records; 1905 Sugar Beet District maps; 1908-1912 USGS Salinas Valley maps; and “Geology and Oil Prospects of Salinas Valley-Parkfield Area, California” by Walter A. English (1915). [Details of 1900 conceptual map are downloadable as supplemental documents.]

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  1905, July – Composite Map of the Salinas Valley Beet Districts No. 1, through No. 4 - Spreckels Sugar Company, composited by Stetson Engineers, Inc.

  This is a composite map created by Stetson Engineers, Inc of the1905 Spreckels maps depicting the water distribution system of Spreckels Sugar Company, District No. 1 through District No. 4, including the sugar beet growers in Salinas River Valley, Monterey.

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  1905, July - Map of the Salinas Valley Beet Districts No. 3 - Spreckels Sugar Company

  This 1905 map depicts the water distribution system of Spreckles Sugar Company, District No. 3, along with the sugar beet growers in Salinas River Valley, Monterey.

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  1905, July - Map of the Salinas Valley Beet Districts No. 4 - Spreckels Sugar Company

  This 1905 map depicts the water distribution system of Spreckles Sugar Company, District No. 4, along with the sugar beet growers in Salinas River Valley, Monterey.

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  1905 - July Map of the Salinas Valley Beet Districts Nos. 1 and 2 - Spreckels Sugar Company

  This 1905 map depicts the water distribution system of Spreckles Sugar Company and the sugar beet growers in Salinas River Valley, Monterey.

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  1908-1910 Salinas Valley Map, Sheet 1

  A 1908-1910 survey map of the Salinas Valley, Monterey County, California, prepared by the United States Department of the Interior, U. S. Geological Survey.