Lake Ilsanjo

Last updated
Lake Ilsanjo
Lake Ilsanjo 10089.jpg
The lake in 2013
Relief map of California.png
Red pog.svg
Lake Ilsanjo
Location Sonoma County, California
Coordinates 38°25′37″N122°38′00″W / 38.4269°N 122.6333°W / 38.4269; -122.6333 [1]
Type Reservoir
Primary inflows Spring Creek
Primary outflows Spring Creek
Basin  countriesUnited States
Max. length650 yd (600 m)

Lake Ilsanjo is a man-made lake located in Annadel State Park east of Santa Rosa in Sonoma County, California, United States. It is a place for fishing and swimming, especially in the summer months. Entrepreneur Joe Coney originally owned the land that is now Annadel State Park and built the lake in the mid-1950s, naming it after his wife Ilsa and himself. [3] It drains into Spring Creek. Coney sold the land to California State Parks in 1969, and it became a state park in 1971.

Contents

The lake is formed by a dam constructed in the 1950s. Originally the overflow drained to a gully during the winter months, but in 2003, the state spent almost US$400,000 building a spillway and release valve to reduce downstream erosion. During the winter of 2007–08, park officials accidentally left the release valve open, causing the lake level to drop far below normal, exposing mudflats that would normally be underwater. [4]

See also

Related Research Articles

<span class="mw-page-title-main">Sierra Nevada</span> Mountain range in the United States

The Sierra Nevada is a mountain range in the Western United States, between the Central Valley of California and the Great Basin. The vast majority of the range lies in the state of California, although the Carson Range spur lies primarily in Nevada. The Sierra Nevada is part of the American Cordillera, an almost continuous chain of mountain ranges that forms the western "backbone" of the Americas.

<span class="mw-page-title-main">Winter Haven, Florida</span> City in Florida, United States

Winter Haven is a city in Polk County, Florida, United States. It is located about 51 miles (82 km) east of Tampa and about 47 miles (76 km) southwest of Orlando, with neighboring Lakeland located to its west. The city's population was 49,219 at the 2020 census, making it the second most populated city in Polk County after Lakeland. It is a principal city of the Lakeland-Winter Haven, Florida Metropolitan Statistical Area.

<span class="mw-page-title-main">Lake Tahoe</span> Lake in California and Nevada, United States

Lake Tahoe is a freshwater lake in the Sierra Nevada of the Western United States, straddling the border between California and Nevada. Lying at 6,225 ft (1,897 m) above sea level, Lake Tahoe is the largest alpine lake in North America, and at 122,160,280 acre⋅ft (150.7 km3) it trails only the five Great Lakes as the largest by volume in the United States. Its depth is 1,645 ft (501 m), making it the second deepest in the United States after Crater Lake in Oregon.

<span class="mw-page-title-main">Colorado River</span> Major river in the western United States and Mexico

The Colorado River is one of the principal rivers in the Southwestern United States and in northern Mexico. The 1,450-mile-long (2,330 km) river, the 5th longest in the United States, drains an expansive, arid watershed that encompasses parts of seven U.S. states and two Mexican states. The name Colorado derives from the Spanish language for "colored reddish" due to its heavy silt load. Starting in the central Rocky Mountains of Colorado, it flows generally southwest across the Colorado Plateau and through the Grand Canyon before reaching Lake Mead on the Arizona–Nevada border, where it turns south toward the international border. After entering Mexico, the Colorado approaches the mostly dry Colorado River Delta at the tip of the Gulf of California between Baja California and Sonora.

<span class="mw-page-title-main">Great Basin</span> Large depression in western North America

The Great Basin is the largest area of contiguous endorheic watersheds, those with no outlets to the ocean, in North America. It spans nearly all of Nevada, much of Utah, and portions of California, Idaho, Oregon, Wyoming, and Baja California. It is noted for both its arid climate and the basin and range topography that varies from the North American low point at Badwater Basin in Death Valley to the highest point of the contiguous United States, less than 100 miles (160 km) away at the summit of Mount Whitney. The region spans several physiographic divisions, biomes, ecoregions, and deserts.

<span class="mw-page-title-main">Detroit Lake</span> Reservoir in Oregon, United States

Detroit Lake is a reservoir impounded by the Detroit Dam on the North Santiam River 46 miles (74 km) southeast of Salem, Oregon, United States. The lake is adjacent to Oregon Route 22 near the city of Detroit. This mesotrophic lake stores water for use by the city of Salem and other nearby communities.

<span class="mw-page-title-main">Kings River (California)</span> River in central California, US

The Kings River, is a 132.9-mile (213.9 km) river draining the Sierra Nevada mountain range in central California in the United States. Its headwaters originate along the Sierra Crest in and around Kings Canyon National Park and form the eponymous Kings Canyon, one of the deepest river gorges in North America. The river is impounded in Pine Flat Lake before flowing into the San Joaquin Valley southeast of Fresno. With its upper and middle course in Fresno County, the Kings River diverges into multiple branches in Kings County, with some water flowing south to the old Tulare Lake bed and the rest flowing north to the San Joaquin River. However, most of the water is consumed for irrigation well upstream of either point.

<span class="mw-page-title-main">Wine Country</span> Area of Northern California known as a wine-growing region

Wine Country is a region of California, in the northern San Francisco Bay Area, known worldwide as a premier wine-growing region. The region is famed for its wineries, its cuisine, Michelin star restaurants, boutique hotels, luxury resorts, historic architecture, and culture. Viticulture and wine-making have been practiced in the region since the Spanish missionaries from Mission San Francisco Solano established the first vineyards in 1812.

<span class="mw-page-title-main">Klamath River</span> River in Oregon and California, United States

The Klamath River is a 257-mile (414 km) long river in southern Oregon and northern California. Beginning near Klamath Falls in the Oregon high desert, it flows west through the Cascade Range and Klamath Mountains before reaching the temperate rainforest of California's North Coast, where it empties into the Pacific Ocean. The Klamath River is the third-largest salmon and steelhead producing river on the west coast of the contiguous United States. The river's watershed – the Klamath Basin – encompasses more than 15,000 square miles (39,000 km2), and is known for its biodiverse forests, large areas of designated wilderness, and freshwater marshes that provide key migratory bird habitat.

<span class="mw-page-title-main">Merced River</span> River in California

The Merced River, in the central part of the U.S. state of California, is a 145-mile (233 km)-long tributary of the San Joaquin River flowing from the Sierra Nevada into the San Joaquin Valley. It is most well known for its swift and steep course through the southern part of Yosemite National Park, where it is the primary watercourse flowing through Yosemite Valley. The river's character changes dramatically once it reaches the plains of the agricultural San Joaquin Valley, where it becomes a slow-moving meandering stream.

<span class="mw-page-title-main">Lake Oroville</span> Reservoir in Butte County, California, U.S.

Lake Oroville is a reservoir formed by the Oroville Dam impounding the Feather River, located in Butte County, northern California. The lake is situated 5 miles (8 km) northeast of the city of Oroville, within the Lake Oroville State Recreation Area, in the western foothills of the Sierra Nevada. Known as the second-largest reservoir in California, Lake Oroville is treated as a keystone facility within the California State Water Project by storing water, providing flood control, recreation, freshwater releases to assist in controlling the salinity intrusion into the Sacramento-San Joaquin Delta and protecting fish and wildlife.

<span class="mw-page-title-main">Trione-Annadel State Park</span> State park of California, U.S.

Trione-Annadel State Park is a state park of California in the United States. It is situated at the northern edge of Sonoma Valley and is adjacent to Spring Lake Regional Park in Santa Rosa. It offers many recreational activities within its 5,092-acre (2,061 ha) property.

<span class="mw-page-title-main">Lake Lansing</span> Lake in the state of Michigan, United States

Lake Lansing is a 461-acre (1.9 km2) lake in Haslett, Michigan, just a few miles northeast of the state's capital city of Lansing.

<span class="mw-page-title-main">Sonoma Creek</span> Stream in California

Sonoma Creek is a 33.4-mile-long (53.8 km) stream in northern California. It is one of two principal drainages of southern Sonoma County, California, with headwaters rising in the rugged hills of Sugarloaf Ridge State Park and discharging to San Pablo Bay, the northern arm of San Francisco Bay. The watershed drained by Sonoma Creek is roughly equivalent to the wine region of Sonoma Valley, an area of about 170 square miles (440 km2). The State of California has designated the Sonoma Creek watershed as a “Critical Coastal Water Resource”. To the east of this generally rectangular watershed is the Napa River watershed, and to the west are the Petaluma River and Tolay Creek watersheds.

<span class="mw-page-title-main">Klamath Basin</span> Region in the U.S. states of Oregon and California drained by the Klamath River

The Klamath Basin is the region in the U.S. states of Oregon and California drained by the Klamath River. It contains most of Klamath County and parts of Lake and Jackson counties in Oregon, and parts of Del Norte, Humboldt, Modoc, Siskiyou, and Trinity counties in California. The 15,751-square-mile (40,790 km2) drainage basin is 35% in Oregon and 65% in California. In Oregon, the watershed typically lies east of the Cascade Range, while California contains most of the river's segment that passes through the mountains. In the Oregon-far northern California segment of the river, the watershed is semi-desert at lower elevations and dry alpine in the upper elevations. In the western part of the basin, in California, however, the climate is more of temperate rainforest, and the Trinity River watershed consists of a more typical alpine climate.

<span class="mw-page-title-main">Gouldsboro State Park</span> State park in Monroe and Wayne counties, Pennsylvania

Gouldsboro State Park is a 2,880-acre (1,165 ha) Pennsylvania state park in Coolbaugh Township, Monroe County and Lehigh Township, Wayne County, Pennsylvania in the United States. The park includes the 250-acre (100 ha) Gouldsboro Lake. Gouldsboro State Park is located very close to Tobyhanna State Park and Pennsylvania State Game Lands 127 and 312. It is on Pennsylvania Route 507 near the small village of Gouldsboro.

<span class="mw-page-title-main">Spring Lake Regional Park</span>

Spring Lake Regional Park is a 320-acre (130 ha) public park in southeastern Santa Rosa, Sonoma County, California, United States. Centered on the Santa Rosa Creek Reservoir, the park is administered by the Sonoma County Regional Parks Department. Its coordinates are 38.45°N 122.65°W, and its official address is 391 Violetti Drive.

<span class="mw-page-title-main">Lexington Reservoir</span> Reservoir in Santa Clara County, California

Lexington Reservoir is an artificial lake on the Los Gatos Creek near Los Gatos, California. The James J. Lenihan Dam, a 195 ft (59 m) high, 1,000 ft (300 m) thick earthen dam, forms the third-largest reservoir in Santa Clara County.

<span class="mw-page-title-main">Ledson Marsh</span>

Ledson Marsh is a 30-acre (0.1 km2) freshwater marsh in Annadel State Park east of Santa Rosa in Sonoma County, California, United States. Located on the east flank of Bennett Mountain, it drains into Schultz Creek, a tributary of Yulupa Creek.

References

  1. "Lake Ilsanjo". Geographic Names Information System . United States Geological Survey, United States Department of the Interior.
  2. "Lake Ilsanjo". Geographic Names Information System . United States Geological Survey, United States Department of the Interior.
  3. "Annadel State Park" (PDF). 2003. Archived from the original (PDF) on September 6, 2012.
  4. "Lake accidentally lowered". Archived from the original on 2008-08-20. Retrieved 2008-03-29.