Crystal Springs Reservoir is a pair of artificial lakes located in the northern Santa Cruz Mountains of San Mateo County, California operated by the San Francisco Public Utilities Commission for water supply to the San Francisco peninsula. The reservoirs are located in the rift valley created by the San Andreas Fault just to the west of the cities of San Mateo and Hillsborough, and I-280. The lakes are part of the San Mateo Creek watershed. Crystal Springs Regional Trail runs along the reservoir.

History

The original name of the southern or Upper Crystal Springs Reservoir was Laguna Grande, a natural lake that disappeared with the creation of the reservoir, which has a California Historical Marker ("NO. 94 Ohlone-Portolá Heritage Trail, Laguna Grande). The Portolà Expedition of 1769 camped here on November 5th. From the journal of Fray Juan Crespí, "We stopped close to a lake where there are countless ducks, geese, and so forth, in the same hollow at a half past one in the afternoon; and we have made three leagues in four hour hours and a half. Here in this hollow tracks have been encountered of large livestock, which some said were made by bears; others, by buffalo ( elk). Also a great many deer have been seen together, while the scouts aver that when they explore here, they saw whole bands of deer, and counted so many as fifty deer together in one. As we were upon the point of setting out from the spot, three very well-behaved heathens came over from the villages here, seeking us out laden with a good share of black pies and a sort of cherries that they made a present of, and they followed us along well pleased, giving us to understand we should go to their village ndthey will give us food. (A great many madroños, small and large, have been met with during these two days' march, laden with fruits the size of so many beads off our rosaries.)" The Expedition found the native people to be most gracious, offering food and guidance. The Lamchins were a large group, probably about 350 people. Their lands in the south-central part of the Peninsula included the present cities of Redwood City and Woodside, as well as the Phleger Estate portion of the Golden Gate National Recreation Area. Their known villages, Cachanigtac, Guloisnistac, Oromstac, and Supichom, cannot be precisely located. Today Laguna Grande is covered by the Upper Crystal Springs Lake located south of Crystal Springs Dam on Cañada Road. The Laguna Grande place name is also shown on the 1840s diseño del Rancho Cañada de Raymundo and an 1856 plat of the Rancho de las Pulgas. The two Crystal Springs lakes and San Andreas Lake used to be known as ''Spring Valley Lakes'' for the Spring Valley Water Company which owned them. The Spring Valley Water Company named the lakes, the Spring Valley Lakes, after the company. The original Spring Valley was between Mason and Taylor Streets, and Washington and Broadway Streets in San Francisco, where the water company started. When the company went south for more water, the Spring Valley name was carried south too.

Crystal Springs village

Lower Crystal Springs Reservoir now covers the town of ''Crystal Springs'' which grew up around a little resort town of the same name, founded in mid-19th century and located just northwest of the present-day dam. The Crystal Springs Hotel tract was constructed around the 1860s on leased land, located from the San Mateo train depot and along a

stagecoach A stagecoach (also: stage coach, stage, road coach, ) is a four-wheeled public transport coach used to carry paying passengers and light packages on journeys long enough to need a change of horses. It is strongly sprung and generally drawn by ...

stop, and around this hotel a small town developed including a dairy and farms. The land leased for the hotel was owned by Spring Valley Water Company. In 1875, the town of Crystal Springs lost its population and business and by 1887, the location of the town was underwater because of the dam construction. There is speculation if any of the town structures were left prior to the dam completion, however according to a 1922 publication by the Spring Valley Water Company, "In the end, the entire of catchment area were swept clean of all human habitation."

Description

CrystalSpringsReservoir-Montara-Pacifica

The entire reservoir consists of two different reservoir lakes. The southern lake, Upper Crystal Springs Reservoir, was created when the Spring Valley Water Company built an earthen dam (this was the first Crystal Springs Dam) on Laguna Creek (or ''Lake Creek''), in 1877. The old earthen dam became a causeway between Upper and Lower Crystal Springs Reservoirs when the latter was formed by Herman Schussler's tall concrete Crystal Springs Dam, which dammed up San Mateo Creek to form the lower (northern) reservoir in 1888. The causeway is now crossed by Highway 92. Laguna Creek flows north through the Filoli estate and has tributaries that descend from the western slope of Edgewood County Park and the eastern slope of the Santa Cruz Mountains. In addition to Laguna Creek, Upper Crystal Springs Reservoir is fed by Adobe Gulch which descends from Cahill Ridge south of and parallel to Highway 92 into a wetland marsh then joins the reservoir at Adobe Point. The northern reservoir, Lower Crystal Springs Reservoir, is fed by San Mateo Creek and San Andreas Creek at its north end. It also receives water from Upper Crystal Springs Reservoir via tunnels beneath Highway 92. Below Crystal Springs Dam, lower San Mateo Creek receives limited flows from Lower Crystal Springs Reservoir and descends to the Bay. In 1924, culverts were built through Upper Crystal Springs Dam to hydraulically link Upper and Lower Crystal Springs Reservoirs. Part of the water in the reservoirs comes from local precipitation and the rest is piped in from the Hetch Hetchy Reservoir in

Yosemite National Park Yosemite National Park ( ) is a List of national parks of the United States, national park of the United States in California. It is bordered on the southeast by Sierra National Forest and on the northwest by Stanislaus National Forest. The p ...

, as well as the Pilarcitos Creek watershed and Alameda Creek watershed. The entire reservoir was built and owned by a

private company A privately held company (or simply a private company) is a company whose Stock, shares and related rights or obligations are not offered for public subscription or publicly negotiated in their respective listed markets. Instead, the Private equi ...

, in the form of the Spring Valley Water Company, and eventually was deeded under the ownership and protection of the city of

San Francisco San Francisco, officially the City and County of San Francisco, is a commercial, Financial District, San Francisco, financial, and Culture of San Francisco, cultural center of Northern California. With a population of 827,526 residents as of ...

. This local protection has ensured the survival of important species in the area, and a set of trails in Crystal Springs Park allows visitors to view the reservoir and the local wildlife. There are giant rainbow trout and bass in the lake. Due to decisions by the San Francisco Public Utilities Commission (SFPUC), Crystal Springs Reservoir is not open to the public.

Flora and fauna

A considerable

biodiversity Biodiversity is the variability of life, life on Earth. It can be measured on various levels. There is for example genetic variability, species diversity, ecosystem diversity and Phylogenetics, phylogenetic diversity. Diversity is not distribut ...

flora Flora (: floras or florae) is all the plant life present in a particular region or time, generally the naturally occurring (indigenous (ecology), indigenous) native plant, native plants. The corresponding term for animals is ''fauna'', and for f ...

and

fauna Fauna (: faunae or faunas) is all of the animal life present in a particular region or time. The corresponding terms for plants and fungi are ''flora'' and '' funga'', respectively. Flora, fauna, funga and other forms of life are collectively ...

exist in the vicinity of the reservoir, which is located within the California Floristic Province. Among these

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

are a number of rare and

endangered species An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching, inv ...

including '' Acanthomintha duttonii'' or San Mateo thornmint, '' Hesperolinon congestum'' (Marin Dwarf Flax) and '' Eriophyllum latilobum'' or San Mateo Woolly Sunflower. A pair of

Bald eagle The bald eagle (''Haliaeetus leucocephalus'') is a bird of prey found in North America. A sea eagle, it has two known subspecies and forms a species pair with the white-tailed eagle (''Haliaeetus albicilla''), which occupies the same niche ...

s (''Haliaeetus leucocephalus'') built a nest in a

Coast Douglas-fir ''Pseudotsuga menziesii'' var. ''menziesii'', commonly known as Coast Douglas-fir, Pacific Douglas-fir, Oregon pine, or Douglas spruce, is an evergreen conifer native to western North America from west-central British Columbia, Canada southward t ...

(''Pseudotsuga menziesii var. menziesii'') in March 2012. This is the first bald eagle nest in San Mateo County since 1915, almost 100 years ago. Although initially unsuccessful, they have returned to their nest in the northwest corner of the Lower Reservoir. In 2013, they successfully mated and the fledgling flew North after leaving the nest.

References

External links