Santa Ynez River
Encyclopedia
The Santa Ynez River is one of the largest river
River
A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

s on the Central Coast of California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

. It is 92 miles (148.1 km) long, flowing from east to west through the Santa Ynez Valley
Santa Ynez Valley
The Santa Ynez Valley is located in Santa Barbara County, California, between the Santa Ynez Mountains to the south and the San Rafael Mountains to the north. The Santa Ynez River flows through the valley from east to west. The Santa Ynez Valley is separated from the Los Alamos Valley, to the...

, reaching the Pacific Ocean at Surf, near Vandenberg Air Force Base
Vandenberg Air Force Base
Vandenberg Air Force Base is a United States Air Force Base, located approximately northwest of Lompoc, California. It is under the jurisdiction of the 30th Space Wing, Air Force Space Command ....

 and the city of Lompoc
Lompoc, California
Lompoc is a city in Santa Barbara County, California, United States. The city was incorporated in 1888. The population was 42,434 at the 2010 census, up from 41,103 at the 2000 census....

.

The river drains the north slope of the Santa Ynez Mountains
Santa Ynez Mountains
The Santa Ynez Mountains are a portion of the Transverse Ranges, part of the Pacific Coast Ranges of the west coast of North America, and are one of the northernmost mountain ranges in Southern California.-Geography:...

, the south slope of the San Rafael Mountains
San Rafael Mountains
The San Rafael Mountains are a mountain range in central Santa Barbara County, California, U.S.. They are part of the Transverse Ranges system of Southern California which in turn are part of the Pacific Coast Ranges system of western North America....

, as well as much of the southern half of Santa Barbara County. Its drainage basin
Drainage basin
A drainage basin is an extent or an area of land where surface water from rain and melting snow or ice converges to a single point, usually the exit of the basin, where the waters join another waterbody, such as a river, lake, reservoir, estuary, wetland, sea, or ocean...

 is 896 square miles (2,320.6 km²) in area. The river's flow is highly variable. It usually dries up almost completely in the summer, but can become a raging torrent in the winter.

History

On August 30, 1769 the river was called the Río Grande de San Verardo or Rio de San Vernardo by the Portolà expedition
Portola expedition
250px|right|Point of San Francisco Bay DiscoveryThe Portolá Expedition was led by Gaspar de Portolá from July 14, 1769 to January 24, 1770. It was the first recorded Spanish land entry and exploration of present day California, United States...

 in the diaries of Miguel Costanso and Pedro Fages, respectively. When the Mission Santa Inés
Mission Santa Inés
Mission Santa Inés was founded on September 17, 1804 by Father Estévan Tapís, who had succeeded Father Fermín Lasuén as President of the California mission chain...

 was established in 1804 for Santa Inés, Virgen y Mártir {Saint Agnes of Rome, Virgin and Martyr), the river and mountains were named after it. Historian Erwin Gudde also cited Gaspar de Portolà
Gaspar de Portolà
Gaspar de Portolà i Rovira was a soldier, governor of Baja and Alta California , explorer and founder of San Diego and Monterey. He was born in Os de Balaguer, province of Lleida, in Catalonia, Spain, of Catalan nobility. Don Gaspar served as a soldier in the Spanish army in Italy and Portugal...

 as referring to the river as the Santa Rosa. According to the USGS
United States Geological Survey
The United States Geological Survey is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization has four major science disciplines, concerning biology,...

, variant and historical names of the Santa Ynez River include La Purisima River, Rio De La Purisima, Rio De Calaguasa, Rio Santa Rosa, Rio De Santa Ines, and Rio De Santa Ynes.

Course

The Santa Ynez River originates in Los Padres National Forest
Los Padres National Forest
Los Padres National Forest is a forest located in southern and central California, which includes most of the mountainous land along the California coast from Ventura to Monterey, extending inland...

, on the northern slope of the Santa Ynez Mountains near Divide Peak and the Ventura County
Ventura County, California
Ventura County is a county in the southern part of the U.S. state of California. It is located on California's Pacific coast. It is often referred to as the Gold Coast, and has a reputation of being one of the safest populated places and one of the most affluent places in the country...

 border. The river flows west, collecting various headwater tributaries. The Upper Santa Ynez Campground is located near the river's source.

After flowing through Billiard Flats the river enters Jameson Lake, the reservoir impounded by Juncal Dam. Below the dam, Alder Creek joins the Santa Ynez River from the south. At times water from Alder Creek is diverted into Jameson Lake via a tunnel.

Continuing its generally westward course, the Santa Ynez flows by several campgrounds and canyons, including Blue Canyon. Mono Creek joins from the north just as the Santa Ynez flows into Gibraltar Reservoir, impounded by Gibraltar Dam.

Below Gibraltar Dam the river passes several campgrounds as well as facilities such as the Los Prietos Ranger Station. Paradise Road runs along the river. Continuing west, the river passes Fremont Campground near the mouth of Red Rock Canyon.

West of Red Rock Canyon the river leaves Los Padres National Forest and its valley widens considerably. Kelly Creek joins from the south, draining Los Laureles Canyon and Cold Spring Canyon. State Route 154, which crosses the Santa Ynez Mountains via San Marcos Pass
San Marcos Pass
San Marcos Pass is a mountain pass in the Santa Ynez Mountains in California.It is traversed by State Route 154. The pass connects Los Olivos and the Santa Ynez Valley with Santa Barbara, California...

, enters the Santa Ynez River valley at this point and follows the river for several miles to the west. Hot Spring Canyon joins from the south just before the Santa Ynez River enters Lake Cachuma.

Lake Cachuma
Lake Cachuma
Lake Cachuma is an artificial lake located in the Santa Ynez Valley of central Santa Barbara County, California on the Santa Ynez River adjoining the north side of California State Route 154. The reservoir was created by the construction of Bradbury Dam, a earth-fill structure built by the U.S....

, the largest reservoir on the river, is approximately five miles in length. Several tributaries join the Santa Ynez River in Lake Cachuma, including Santa Cruz Creek and Cachuma Creek from the north and a number of smaller streams from the south. The lake area is designated as the Lake Cachuma Recreation Area. Cachuma County Park, near Tequepis Point, provides lake access. Water from the lake is diverted into Tecolote Tunnel, which passes south under the mountains to the Santa Barbara area.

Below Lake Cachuma, the Santa Ynez River continues its westward course. Its valley continues to widen and contains ranches and other development. The river passes by the town of Santa Ynez
Santa Ynez, California
Santa Ynez is a census-designated place in Santa Barbara County, California, United States. The town of Santa Ynez is one of the communities that make up the Santa Ynez Valley, and features the Santa Ynez Airport for general aviation with a paved 2804 x 75 foot runway. The population was 4,418...

 and the cities of Solvang
Solvang, California
Solvang is a city in Santa Barbara County, California, United States. It is one of the communities that make up the Santa Ynez Valley. The population was 5,245 at the 2010 census, down from 5,332 at the 2000 census...

 and Buellton
Buellton, California
Buellton is a small city in Santa Barbara County, California, United States. The city of Buellton is one of the communities that make up the Santa Ynez Valley...

. In Buellton the river is crossed by U.S. Route 101. Several tributaries join the river in this area, including Quiota Creek, Alisal Creek, and Nojoqui Creek and Falls
Nojoqui Falls
Nojoqui Falls is a seasonal waterfall in the Santa Barbara County, California park of the same name.- Description :From the sign posted near the falls: "Unlike most waterfalls, which gradually erode upstream, the Nojoqui Falls have built outward from the cliff over time...

 from the south, and Alamo Pintado Creek and Zaca Creek from the north.

West of Buellton the Santa Ynez River flows between the Santa Rita Hills and Purisima Hills to the north and the Santa Rosa Hills to the south. It is joined by Santa Rosa Creek from the north and Salsipuedes Creek from the south. Just west of Salsipuedes Creek the Santa Ynez River flows past the largest city in the valley, Lompoc
Lompoc, California
Lompoc is a city in Santa Barbara County, California, United States. The city was incorporated in 1888. The population was 42,434 at the 2010 census, up from 41,103 at the 2000 census....

. A few miles west of Lompoc the river reaches the Pacific Ocean at a location known as Surf, where there is a beach and an Amtrak
Amtrak
The National Railroad Passenger Corporation, doing business as Amtrak , is a government-owned corporation that was organized on May 1, 1971, to provide intercity passenger train service in the United States. "Amtrak" is a portmanteau of the words "America" and "track". It is headquartered at Union...

 station.

While there is public access to Surf and the mouth of the Santa Ynez River, most of the land between Lompoc and the ocean is part of Vandenberg Air Force Base
Vandenberg Air Force Base
Vandenberg Air Force Base is a United States Air Force Base, located approximately northwest of Lompoc, California. It is under the jurisdiction of the 30th Space Wing, Air Force Space Command ....

.

Discharge

The USGS operates several stream gages along the Santa Ynez river. Gage 11133000 is located at Narrows, near Lompoc. The mean annual discharge
Discharge (hydrology)
In hydrology, discharge is the volume rate of water flow, including any suspended solids , dissolved chemical species and/or biologic material , which is transported through a given cross-sectional area...

 recorded over the period since flow regulation by Lake Cachuma, in 1952, up to 2009, is 127 cuft/s. The maximum discharge was 80000 cuft/s, recorded on January 25, 1969. The maximum discharge predating the stream gage was an estimated 120000 cuft/s, during the flood of January 9, 1907. There is no flow at all for several months each year.

River modifications

There are three reservoir
Reservoir
A reservoir , artificial lake or dam is used to store water.Reservoirs may be created in river valleys by the construction of a dam or may be built by excavation in the ground or by conventional construction techniques such as brickwork or cast concrete.The term reservoir may also be used to...

s on the river, the largest of which is Lake Cachuma
Lake Cachuma
Lake Cachuma is an artificial lake located in the Santa Ynez Valley of central Santa Barbara County, California on the Santa Ynez River adjoining the north side of California State Route 154. The reservoir was created by the construction of Bradbury Dam, a earth-fill structure built by the U.S....

, with a capacity of 205000 acre.ft. Bradbury Dam, which forms the lake, was built by the U.S. Bureau of Reclamation. Water from Lake Cachuma is diverted into the Tecolote Tunnel, which passes south under the Santa Ynez Mountains. The tunnel supplies water to the city of Santa Barbara
Santa Barbara, California
Santa Barbara is the county seat of Santa Barbara County, California, United States. Situated on an east-west trending section of coastline, the longest such section on the West Coast of the United States, the city lies between the steeply-rising Santa Ynez Mountains and the Pacific Ocean...

 (which uses it for drinking water
Drinking water
Drinking water or potable water is water pure enough to be consumed or used with low risk of immediate or long term harm. In most developed countries, the water supplied to households, commerce and industry is all of drinking water standard, even though only a very small proportion is actually...

), the Goleta
Goleta, California
Goleta is a city in southern Santa Barbara County, California, USA. It was incorporated as a city in 2002, after a long period as the largest unincorporated, populated area in the county. As of the 2000 census, the Census-designated place had a total population of 55,204, however, a significant...

 Water District, the Carpinteria
Carpinteria, California
Carpinteria is a small oceanside city located in southeastern Santa Barbara County, California, east of Santa Barbara and northwest of Ventura. The population was 13,040 at the 2010 census, down from 14,194 at the 2000 census....

 Valley Water District, and the Montecito
Montecito, California
Montecito is an unincorporated community in Santa Barbara County, California. As a census-designated place, it had a population of 8,965 in 2010. This does not include areas such as Coast Village Road, that, while usually considered part of Montecito, are actually within the city limits of Santa...

 Water District. Water from Lake Cachuma is released into the Santa Ynez River below Bradbury Dam in order to satisfy downstream water rights.

The other two reservoirs are Gibraltar Reservoir, impounded by Gibraltar Dam, and Jameson Lake, impounded by Juncal Dam. Gibraltar Reservoir supplies water to the City of Santa Barbara via the Santa Barbara Water Tunnel under the Santa Ynez Mountains. Jameson Lake supplies water to the Montecito Water District via another tunnel under the Santa Ynez Mountains. In 2004 the diversions amounted to 3130 acre.ft from Gibraltar Reservoir, and 1730 acre.ft from Jameson Lake.

A 2010 report on the restoration potential of the Santa Ynez River estuary, found "Over the last 150 years human activities, especially dam construction, have significantly affected river flows in the entire watershed. The most important changes to wetland habitats and ecologic processes have resulted from changed river inflows and sediment loads from the watershed combined with changing hydraulic and geomorphic effects from bridge causeways. These process changes have led to alteration of sedimentation and erosion patterns and converted wetland habitats to upland. Upstream dam construction now controls 47% of the watershed’s annual runoff, has reduced the frequency and duration of lagoon breaching as well as the magnitude and frequency of flood events that have the most important role in sustaining and renewing a mosaic of wetland and estuarine habitats within the estuary and lower river."

Ecology

In the 1940s the Santa Ynez River was thought to have the largest run of Steelhead trout (Oncorhyncus mykiss) south of San Francisco Bay
San Francisco Bay
San Francisco Bay is a shallow, productive estuary through which water draining from approximately forty percent of California, flowing in the Sacramento and San Joaquin rivers from the Sierra Nevada mountains, enters the Pacific Ocean...

. Prior to the completion of Cachuma Dam
Lake Cachuma
Lake Cachuma is an artificial lake located in the Santa Ynez Valley of central Santa Barbara County, California on the Santa Ynez River adjoining the north side of California State Route 154. The reservoir was created by the construction of Bradbury Dam, a earth-fill structure built by the U.S....

 in 1953, the steelhead run on the Santa Ynez River was estimated to be as high as 25,000 adults. Three decades earlier, in 1920, the Gibraltar Dam was built and blocked access to spawning in the upper watershed, so early twentieth century steelhead runs were likely much higher still. The National Marine Fisheries Service
National Marine Fisheries Service
The National Marine Fisheries Service is a United States federal agency. A division of the National Oceanic and Atmospheric Administration and the Department of Commerce, NMFS is responsible for the stewardship and management of the nation's living marine resources and their habitat within the...

 listed the Southern California steelhead Evolutionarily Significant Unit (ESU) as endangered in 1997 due to a 99% decline in its population in the twentieth century. The southern steelhead is the most endangered steelhead ESU in California, and the West Coast of North America. A wild rainbow trout population above the Cachuma Dam probably provides outgoing smolts which become steelhead trout in the ocean, however a low percentage of outgoing smolt survive the migration because of low to no flows or predation in the coastal estuary. Genetic analysis of the steelhead in the Santa Ynez River watershed has shown them to be of native and not hatchery stocks.

The lower Santa Ynez River in the Lompoc area, and lower tributary Salsipuedes Creek has about a dozen California Golden beaver (Castor canadensis subauratus) dam
Beaver dam
Beaver dams are dams built by beavers as protection against predators such as coyotes, wolves, and bears, and to provide easy access to food during winter. Beavers work at night and are prolific builders, carrying mud and stones with their fore-paws and timber between their teeth...

s, however in wet years steelhead can generally get around, over, or through beaver dams, and steelhead are common in rivers and streams where beaver are numerous. In addition, high winter flows disrupt the beaver dams and allow steelhead passage. The beavers may play a critical role for steelhead populations as their ponds replenish aquifers, allowing groundwater to recharge streams in dry summers, and provide perennial pools for oversummering trout smolt. In fact, salmonid abundance and fish size increases when beaver are present. Evidence that beaver were once extant in southern California coastal streams includes an adult male beaver skull collected by mammalogist Dr. John Hornung in May, 1906 "along the Sespe River
Sespe Creek
Sespe Creek is a stream, some long, in Ventura County, California, in the United States. The creek starts at Potrero Seco in the Sierra Madre Mountains, and is formed by more than thirty tributary streams before it empties into the Santa Clara River in Fillmore. Thirty-one miles of Sespe Creek are...

 in Ventura County
Ventura County, California
Ventura County is a county in the southern part of the U.S. state of California. It is located on California's Pacific coast. It is often referred to as the Gold Coast, and has a reputation of being one of the safest populated places and one of the most affluent places in the country...

" which is now housed in the Berkeley Museum of Vertebrate Zoology. There is a Chumash pictograph of a beaver at Painted Rock in the nearby Cuyama River
Cuyama River
The Cuyama River is a river in southern San Luis Obispo County, northern Santa Barbara County, and northern Ventura County, in the U.S. state of California. It joins the Sisquoc River forming the Santa Maria River...

 watershed. In addition the Barbareño and Ventureño Chumash had a Beaver Dance. The Chumash word for beaver is Chipik, spelled "č’ǝpǝk’" in Barbareño and "tšǝ’pǝk" in Ventureño, and "č’ɨpɨk" in Ineseño (Samala) (Timothy Henry personal communication 2011-01-23). Taken together, these facts support the hypothesis that beaver ranged throughout Santa Barbara County, California
Santa Barbara County, California
Santa Barbara County is a county located in the southern portion of the U.S. state of California, on the Pacific coast. As of 2010 the county had a population of 423,895. The county seat is Santa Barbara and the largest city is Santa Maria.-History:...

. Finally, Father Pedro Font, on the second de Anza Expedition in 1776, described the coastal Chumash women as wearing beaver capes. However, the Santa Ynez River beaver were likely trapped out until re-introduction in the 1940s by the California Department of Fish and Game
California Department of Fish and Game
The California Department of Fish and Game is a department within the government of California, falling under its parent California Natural Resources Agency. The Department of Fish and Game manages and protects the state's diverse fish, wildlife, plant resources, and native habitats...

.

The endangered Tidewater goby
Tidewater goby
The tidewater goby Eucyclogobius newberryi is a goby native to lagoons of streams along the coast of California.-Taxonomy:The genus name translates as "true cycloid goby", referring to the scales, while the species epithet is in honor of J. S. Newberry. The tidewater goby is the sole member of its...

 (Eucyclogobius newberryi) is also found in the creek's brackish coastal lagoon and several miles upstream in sections of stream impounded by beavers which provide ideal slow-moving water habitat for gobies.

See also

  • List of rivers in California
  • California Fur Rush
    California Fur Rush
    Before the 1849 California Gold Rush, American, English and Russian fur hunters were drawn to Spanish California in a California Fur Rush, to exploit its enormous fur resources...

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