Santa Margarita Lake, also called Salinas Reservoir, is a lake

Lake

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

 several miles southeast of the town of Santa Margarita

Santa Margarita, California

Santa Margarita is a census-designated place located in San Luis Obispo County, California. It was founded in 1897 near Cuesta Peak and San Luis Obispo along State Route 58. The town's name comes from the Mexican Alta California land grant. It is home to the Santa Margarita de Cortona Asistencia...

 in San Luis Obispo County, California

San Luis Obispo County, California

San Luis Obispo County is a county located along the Pacific Ocean in the Central Coast of the U.S. state of California, between Los Angeles and the San Francisco Bay Area. As of the 2010 census its population was 269,637, up from 246,681 at the 2000 census...

. The lake was created by the building of Salinas Dam on the southern end of the Salinas River

Salinas River (California)

The Salinas River is the largest river of the central coast of California, running and draining 4,160 square miles. It flows north-northwest and drains the Salinas Valley that slices through the Coast Range south from Monterey Bay...

, very close to the river's origin in the Coast Range

Coast Ranges (California)

The Coast Ranges of California constitute one of the eleven traditional geomorphic provinces of California. They include several but not all mountain ranges along the California coast...

. The dam

Dam

A dam is a barrier that impounds water or underground streams. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees are used to manage or prevent water flow into specific land regions. Hydropower and pumped-storage hydroelectricity are...

 was built by the United States Army Corps of Engineers

United States Army Corps of Engineers

The United States Army Corps of Engineers is a federal agency and a major Army command made up of some 38,000 civilian and military personnel, making it the world's largest public engineering, design and construction management agency...

 in 1941 to provide water for Camp San Luis Obispo

Camp San Luis Obispo

Camp San Luis Obispo is the original home of the California Army National Guard. It served as an Infantry Division Camp and Cantonment Area for the United States Army during World War II.-History:...

. It now provides the city of San Luis Obispo with a portion of its 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 city also uses groundwater

Groundwater

Groundwater is water located beneath the ground surface in soil pore spaces and in the fractures of rock formations. A unit of rock or an unconsolidated deposit is called an aquifer when it can yield a usable quantity of water. The depth at which soil pore spaces or fractures and voids in rock...

 and water from Whale Rock Reservoir

Whale Rock Reservoir

Whale Rock Reservoir is a reservoir near Cayucos in San Luis Obispo County, California. The reservoir was formed by the building of Whale Rock Dam on Old Creek by the Whale Rock Commission. It is a 193-foot tall earthfill dam that was completed in 1961. The reservoir has a capacity of . The...

 in Cayucos. The lake is relatively small, with a capacity of 23843 acre.ft. Since it is a municipal water source, human contact is prohibited. Boating

Boating

Boating is the leisurely activity of travelling by boat, or the recreational use of a boat whether powerboats, sailboats, or man-powered vessels , focused on the travel itself, as well as sports activities, such as fishing or water skiing...

 and fishing

Fishing

Fishing is the activity of trying to catch wild fish. Fish are normally caught in the wild. Techniques for catching fish include hand gathering, spearing, netting, angling and trapping....

 are popular activities on the lake and there are camping

Camping

Camping is an outdoor recreational activity. The participants leave urban areas, their home region, or civilization and enjoy nature while spending one or several nights outdoors, usually at a campsite. Camping may involve the use of a tent, caravan, motorhome, cabin, a primitive structure, or no...

 sites on the shore.

The lake is stocked with rainbow trout

Rainbow trout

The rainbow trout is a species of salmonid native to tributaries of the Pacific Ocean in Asia and North America. The steelhead is a sea run rainbow trout usually returning to freshwater to spawn after 2 to 3 years at sea. In other words, rainbow trout and steelhead trout are the same species....

 and is also home to largemouth bass

Largemouth bass

The largemouth bass is a species of black bass in the sunfish family native to North America . It is also known as widemouth bass, bigmouth, black bass, bucketmouth, Potter's fish, Florida bass, Florida largemouth, green bass, green trout, linesides, Oswego bass, southern largemouth...

, catfish

Catfish

Catfishes are a diverse group of ray-finned fish. Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from the heaviest and longest, the Mekong giant catfish from Southeast Asia and the second longest, the wels catfish of Eurasia, to detritivores...

, carp

Carp

Carp are various species of oily freshwater fish of the family Cyprinidae, a very large group of fish native to Europe and Asia. The cypriniformes are traditionally grouped with the Characiformes, Siluriformes and Gymnotiformes to create the superorder Ostariophysi, since these groups have certain...

, black crappie and various sunfish

Lepomis

Lepomis is a genus of freshwater fish in the sunfish family of order Perciformes. The most recognizable species of the sixteen in this genus is the Bluegill....

.

There are dirt road

Dirt road

Dirt road is a common term for an unpaved road made from the native material of the land surface through which it passes, known to highway engineers as subgrade material. Dirt roads are suitable for vehicles; a narrower path for pedestrians, animals, and possibly small vehicles would be called a...

s that provide access to almost the entire perimeter of the lake. There is a 15 mile per hour (24 km/h) speed limit, as the roads are bumpy and vehicles kick up a lot of dust

Dust

Dust consists of particles in the atmosphere that arise from various sources such as soil dust lifted up by wind , volcanic eruptions, and pollution...

, even at slow speeds. In addition, many visitors park on the side of the road to fish. The default speed limit on the lake itself is 5 miles per hour (8 km/h), but boat

Boat

A boat is a watercraft of any size designed to float or plane, to provide passage across water. Usually this water will be inland or in protected coastal areas. However, boats such as the whaleboat were designed to be operated from a ship in an offshore environment. In naval terms, a boat is a...

s can travel up to 30 miles (48 km/h) per hour in certain areas, depending on conditions.

There is a proposal to raise the dam by 19 feet (8 m) with the addition of a spillway

Spillway

A spillway is a structure used to provide the controlled release of flows from a dam or levee into a downstream area, typically being the river that was dammed. In the UK they may be known as overflow channels. Spillways release floods so that the water does not overtop and damage or even destroy...

 gate, which was part of the original design. The loss of trees from the additional capacity has been a major concern. In the area to be flooded there are 1,639 coast live oak

Coast Live Oak

Quercus agrifolia, the Coast Live Oak, is an evergreen oak , native to the California Floristic Province. It grows west of the Sierra Nevada from Mendocino County, California, south to northern Baja California in Mexico. It is classified in the red oak section Quercus agrifolia, the Coast Live Oak,...

s, 633 blue oak

Blue Oak

Quercus douglasii, the Blue Oak, is an oak in the white oak section of the genus, Quercus sect. Quercus. It is endemic to California and is found in foothills surrounding the Central Valley of California and certain locations in the California Coast Ranges, USA...

s, 198 valley oak

Valley Oak

Quercus lobata, commonly called the Valley oak, grows into the largest of North American oaks. It is endemic to California, growing in the interior valleys and foothills. Mature specimens may attain an age of up to 600 years. This deciduous oak requires year-round access to groundwater.Its thick,...

s and 469 gray pine

Gray Pine

Pinus sabiniana , with the common names gray pine, California foothill pine, and the more historically and internationally used digger pine, is a pine endemic to California in the United States...

s. The loss of oak trees is of ecological concern, since oak trees in the area are already contending with sudden oak death

Sudden oak death

Sudden Oak Death is the common name of a disease caused by the oomycete plant pathogen Phytophthora ramorum. The disease kills oak and other species of tree and has had devastating effects on the oak populations in California and Oregon as well as also being present in Europe...

.