Island Mountain | |
---|---|
Highest point | |
Elevation | 3,847 ft (1,173 m) NGVD 29 [1] |
Coordinates | 39°57′48″N123°29′31″W / 39.9632061°N 123.4919661°W [2] |
Geography | |
Location | Trinity County, California, U.S. |
Parent range | Range from Mendocino County to Trinity County |
Topo map | USGS Bell Springs and Updegraff Ridge |
Island Mountain is a resistant formation of volcanic and metavolcanic rock in the Franciscan Assemblage of southwestern Trinity County, California. It was mined for sulfur metal deposits during the first half of the 20th century and was the final obstacle in the construction of a railroad line to Eureka, California in 1914. The name is applied to the range, the peak, a populated place and an abandoned railroad station, tunnel and bridge all but the first located within the S-bend of the Eel River which gave the peak its name.
Island Mountain is a named peak [3] in the Island Mountain range which covers an area from Mendocino County into Trinity County. The highest point of this range, and its official centroid, is a benchmark called "South Peak" on the unnamed tallest point which is in Mendocino County. [1] Island Mountain in Trinity County was named by settlers in the 1850s because it is nearly isolated by water from two creeks and the Eel River. [3] Due to the resistance of the rock to erosion, the Eel River makes an abrupt "S" curve around Island Mountain in its otherwise north-northwesterly flow between the California Coast Ranges. [4] It was noted as "Island Peak" by John Rockwell of the Coast Survey in 1878. [5]
The Island Mountain itself ( 40°1′25.89″N123°29′50.95″W / 40.0238583°N 123.4974861°W ) was the final obstacle to completion of the Northwestern Pacific Railroad between San Francisco and Eureka. [6] Railroad construction proceeded northerly down the west side of the Eel River canyon and bridged the river at the "S" curve to enter 4,313-foot (0.82 mi; 1.31 km) tunnel number 27 through the mountain. [7] There was a golden spike ceremony downstream of the mountain at Cain Rock in 1914 to complete the railroad. [6] The redwood framing of tunnel 27 burned on September 6, 1978, and a significant length of the tunnel collapsed. Tunnel rebuilding costing 3.8 million dollars was completed on December 7, 1979. [8] Stop number 293, also named "Island Mountain" on the Northwestern Pacific Railroad was located along the tracks near the river where a railroad bridge crosses the Eel prior to the tracks entering the south end of Island Mountain tunnel at milepost 194.8. [8]
A volcanogenic massive sulfide ore deposit within Island Mountain was mined after rail service became available. Between 1915 and 1930, 4,100 tons of copper, 140,000 ounces of silver, and 8,600 ounces of gold were mined. [9] Minerals identified within the ore body include chalcanthite, chalcopyrite, copiapite, goslarite, pyrite, and pyrrhotite. [10] Volcanic rock was quarried from Island Mountain by Northwestern Pacific Railroad for heavy riprap used as far away as Humboldt Bay. [7]
Island Mountain is the name of a populated place located in Trinity County located at 40°1′33.6″N123°29′24″W / 40.026000°N 123.49000°W , 538 feet (164 m) above sea level. [11] [12] The first post office here was established in 1905 under the name "Island" until August 16, 1915, when it was renamed "Island Mountain." [5]
The Klamath Mountains are a rugged and lightly-populated mountain range in northwestern California and southwestern Oregon in the western United States. As a mountain system within both the greater Pacific Coast Ranges and the California Coast Ranges, the Klamath Mountains have a varied geology, with substantial areas of serpentinite and marble, and a climate characterized by moderately cold winters with very heavy snowfall and warm, very dry summers with limited rainfall, especially in the south. As a consequence of the geology and soil types, the mountains harbor several endemic or near-endemic trees, forming one of the largest collections of conifers in the world. The mountains are also home to a diverse array of fish and animal species, including black bears, large cats, owls, eagles, and several species of Pacific salmon. Millions of acres in the mountains are managed by the United States Forest Service. The northernmost and largest sub-range of the Klamath Mountains are the Siskiyou Mountains.
The Eel River is a major river, about 196 miles (315 km) long, in northwestern California. The river and its tributaries form the third largest watershed entirely in California, draining a rugged area of 3,684 square miles (9,540 km2) in five counties. The river flows generally northward through the Coast Ranges west of the Sacramento Valley, emptying into the Pacific Ocean about 10 miles (16 km) downstream from Fortuna and just south of Humboldt Bay. The river provides groundwater recharge, recreation, and industrial, agricultural and municipal water supply.
The California Western Railroad, AKA Mendocino Railway popularly called the Skunk Train, is a rail freight and heritage railroad transport railway in Mendocino County, California, United States, running from the railroad's headquarters in the coastal town of Fort Bragg to the interchange with the Northwestern Pacific Railroad at Willits.
The Navarro River is a 28.3-mile-long (45.5 km) river in Mendocino County, California, United States. It flows northwest through the Coastal Range to the Pacific Ocean. The main stem of the Navarro River begins less than 1 mile (2 km) south of the town of Philo at the confluence of Rancheria Creek and Anderson Creek. The mouth of the Navarro is 10 miles (16 km) south of the city of Mendocino. State Route 128 starts from the intersection of State Route 1 at the mouth of the Navarro River, and follows the river valley upstream to Philo. The river is close to the highway through the lower canyon but is some distance south of the highway as the Anderson Valley widens upstream of Wendling.
The Northwestern Pacific Railroad is a 271-mile (436 km) mainline railroad from the ferry connections in Sausalito north to Eureka with a connection to the national railroad system at Schellville. The railroad has gone through a history of different ownership and operators but has maintained a generic name of reference as The Northwestern Pacific Railroad, despite no longer being officially named that. Currently, only a 62-mile (100 km) stretch of mainline from Larkspur to the Sonoma County Airport in Windsor and east to Schellville on the “south end” is operated by Sonoma–Marin Area Rail Transit (SMART), which operates both commuter and freight trains with plans for future extension north to Cloverdale. The “north end” from Willits to Eureka is currently out of service, but saved by 2018 legislation to be converted into the Great Redwood Trail.
The Coast Ranges of California span 400 miles (644 km) from Del Norte or Humboldt County, California, south to Santa Barbara County. The other three coastal California mountain ranges are the Transverse Ranges, Peninsular Ranges and the Klamath Mountains.
The Pacific Lumber Company, officially abbreviated PALCO, and also commonly known as PL, was one of California's major logging and sawmill operations, located 28 miles (45 km) south of Eureka and 244 miles (393 km) north of San Francisco. Begun in 1863, PALCO was managed over most of the twentieth century by generations of the Simon J. Murphy, Sr. Family or managers chosen by the Murphys from 1905 through 1985. Primary operations existed in massive log storage and milling operations at the historic company town of Scotia, California, located adjacent to US 101 along the Eel River. Secondary mills were located in nearby Fortuna and Carlotta. PALCO had extensive timber holdings exceeding well over 200,000 acres (890 km²) in the Redwood and Douglas-Fir forests of Humboldt County. For generations, it was one of the largest private employers in the entire region, appropriately known as the Redwood Empire.
The Big River is a 41.7-mile-long (67.1 km) river in Mendocino County, California, that flows from the northern California Coast Range to the Pacific Ocean at Mendocino, Mendocino County, California. From the mouth, brackish waters extend 8 miles (13 km) upstream, forming the longest undeveloped estuary in the state.
Scotia, formerly known as Forestville until 1888, is a census-designated place in Humboldt County, California. It is located on the Eel River along U.S. Route 101, 8.5 miles (13.7 km) southeast of Fortuna and 244 miles (393 km) north of San Francisco. Scotia has a population of 850.
Alton is an unincorporated community in Humboldt County, California. It is located 3.5 miles (5.6 km) south-southeast of Fortuna, at an elevation of 62 feet. Alton is located along U.S. Route 101 and State Route 36. The ZIP Code is 95540. The community is inside area code 707.
Austin Creek is a 16.0-mile-long (25.7 km) southward-flowing stream in the mountains of western Sonoma County, California which empties into the Russian River about 4 miles (6 km) from the Pacific Ocean.
The Yolla Bolly–Middle Eel Wilderness is a federally designated wilderness area in the Yolla Bolly Range of the southern Klamath Mountains and the Inner Northern California Coast Ranges, in Northern California.
Larabee is a locality in Humboldt County, California. It is located on the Northwestern Pacific Railroad 1 mile (2 km) east-northeast of Redcrest, at an elevation of 161 feet (49 m). Larabee only has seasonal access across the Eel River; alternatively there is a former lumber road through Larabee Ranch, and on through Pacific Lumber Company property, that connects to Shively Road approximately five miles northwest. This road is only open during the winter when the temporary summer bridge is washed away by the rain-engorged Eel River.
Navarro is an unincorporated community in Mendocino County in the U.S. state of California. It is located 18 miles (29 km) west of Ukiah, at an elevation of 269 feet (82 m). It may be reached via the east–west California State Route 128, which connects it to the Pacific coast to the west and to the Anderson Valley to the southeast.
The South Fork Eel River is the largest tributary of the Eel River in north-central California in the United States. The river flows 105 miles (169 km) north from Laytonville to Dyerville/Founders' Grove where it joins the Eel River. The South Fork drains a long and narrow portion of the Coast Range of California in parts of Mendocino and Humboldt counties. U.S. Route 101 follows the river for much of its length.
Scotia Bluffs form a 2-mile (3-kilometer) series of gray sandstone cliffs along the north bank of the Eel River near Rio Dell, California.
The Fort Bragg and Southeastern Railroad was formed by Atchison, Topeka and Santa Fe Railway as a consolidation of logging railways extending inland from Albion, California on the coast of Mendocino County. The railroad and its predecessors operated from August 1, 1885 to January 16, 1930. The line was merged into the regional Northwestern Pacific Railroad in 1907; but planned physical connection was never completed.
The North Fork Eel River is the smallest of four major tributaries of the Eel River in northwestern California in the United States. It drains a rugged wilderness area of about 286 square miles (740 km2) in the California Coast Ranges, and flows through national forests for much of its length. Very few people inhabit the relatively pristine watershed of the river; there are no operational stream gauges and only one bridge that crosses the river, near the boundary between Trinity and Mendocino Counties.
The geology of California is highly complex, with numerous mountain ranges, substantial faulting and tectonic activity, rich natural resources and a history of both ancient and comparatively recent intense geological activity. The area formed as a series of small island arcs, deep-ocean sediments and mafic oceanic crust accreted to the western edge of North America, producing a series of deep basins and high mountain ranges.
The Ukiah area is an area of 303 square miles (78,000 ha) in southeastern Mendocino County, California that encompasses the arable valleys of the Russian River drainage system and the adjacent parts of the Mendocino Range Mountains of the Pacific Coast Range.