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Mary Murphy Mine
The Mary Murphy Mine was the principal gold mine of the Chalk Creek mining district of Chaffee County, Colorado, United States, near St. Elmo, Colorado. The Mary Murphy Mine operated continuously from 1870 to 1925, and produced 220 thousand ounces of gold, worth $4.4 million then (or about $180,000,000 in 2008), plus considerable silver, lead, and zinc. There were two aerial tramways connecting the mine to Romley, Colorado, and the Denver, South Park and Pacific Railroad. In 1984 the Historic American Engineering Record recorded the structures then standing in the area. Drainage from the old mine into Chalk Creek, a tributary of the Upper Arkansas River, would sometimes cause fish kills at Chalk Cliffs Rearing Unit, the state-run fish hatchery downstream, such as the kill of 800,000 fingerling trout in 1986. The Colorado Division of Minerals and Geology consolidated all of the surface wastes and capped them in a “high-and-dry” spot on the mill site. This reduced the diss ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chalk Cliffs Rearing Unit
The Chalk Cliffs Rearing Unit is a Colorado Parks and Wildlife cold water fish production facility located near Arkansas River and Chalk Creek in Chaffee County, Colorado. Hatchery staff works to support the raising of approximately 700,000 catchable, ten-inch rainbow trout annually. The hatchery stocks fish along the Front Range from Loveland to the New Mexico border, and east almost to the Kansas border. History Chalk Cliffs was inaugurated in 1950. In 1986, the facility experienced a widespread death among fingerling trout. This was thought to be a result of using creek water. Water quality sampling by the Department of Public Health and the Environment found that the cause was high amounts of zinc and cadmium, from the Mary Murphy Mine upstream. In 1990, Chalk Creek was chosen for cleanup through the Division of Minerals and Geology. This was necessary as the levels were impacting fish habitats and water quality degradation in the Arkansas River. Yet, their clean up attempt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ghost Towns In Colorado
This is a list of some ghost towns in the U.S. State of Colorado. Colorado has over 1,500 ghost towns, although visible remains of only about 640 still exist. Due to incomplete records and legends that are now accepted as fact, no exhaustive list can realistically be produced. __TOC__ Colorado ghost towns Most Colorado ghost towns were abandoned for the following reasons: *Mining towns were abandoned when the mines closed; many due to the devaluation of silver in 1893. *Mill towns were abandoned when the mining towns they serviced closed. *Farming towns on the eastern plains were often deserted due to rural depopulation. *Coal towns were abandoned when the coal (or the need for it) ran out. *Stage stops were abandoned when the railroad came through. *Rail stops were deserted when the railroad changed routes or abandoned the spurs. Others were abandoned for more unusual reasons. Some were resort towns which never brought in enough tourists. One or two former townsites are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Former Populated Places In Chaffee County, Colorado
A former is an object, such as a template, gauge or cutting die, which is used to form something such as a boat's hull. Typically, a former gives shape to a structure that may have complex curvature. A former may become an integral part of the finished structure, as in an aircraft fuselage, or it may be removable, being using in the construction process and then discarded or re-used. Aircraft formers Formers are used in the construction of aircraft fuselage, of which a typical fuselage has a series from the nose to the empennage, typically perpendicular to the longitudinal axis of the aircraft. The primary purpose of formers is to establish the shape of the fuselage and reduce the column length of stringers to prevent instability. Formers are typically attached to longerons, which support the skin of the aircraft. The "former-and-longeron" technique (also called stations and stringers) was adopted from boat construction, and was typical of light aircraft built until the ad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colorado Mining Boom
Colorado (, other variants) is a state in the Mountain states, Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains. Colorado is the List of U.S. states and territories by area, eighth most extensive and List of U.S. states and territories by population, 21st most populous U.S. state. The 2020 United States Census, 2020 United States census enumerated the population of Colorado at 5,773,714, an increase of 14.80% since the 2010 United States Census, 2010 United States census. The region has been inhabited by Indigenous peoples of the Americas, Native Americans and their Paleo-Indians, ancestors for at least 13,500 years and possibly much longer. The eastern edge of the Rocky Mountains was a major migration route for early peoples who spread throughout the Americas. "''Colorado''" is the Spanish adjective meaning "ruddy", th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buildings And Structures In Chaffee County, Colorado
A building, or edifice, is an enclosed structure with a roof and walls standing more or less permanently in one place, such as a house or factory (although there's also portable buildings). Buildings come in a variety of sizes, shapes, and functions, and have been adapted throughout history for a wide number of factors, from building materials available, to weather conditions, land prices, ground conditions, specific uses, prestige, and aesthetic reasons. To better understand the term ''building'' compare the list of nonbuilding structures. Buildings serve several societal needs – primarily as shelter from weather, security, living space, privacy, to store belongings, and to comfortably live and work. A building as a shelter represents a physical division of the human habitat (a place of comfort and safety) and the ''outside'' (a place that at times may be harsh and harmful). Ever since the first cave paintings, buildings have also become objects or canvasses of much artis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trout Unlimited
Trout Unlimited (TU) is a US non-profit organization dedicated to the conservation of freshwater streams, rivers, and associated upland habitats for trout, salmon, other aquatic species, and people. It is headquartered in Arlington, Virginia. The organization began in 1959 in Michigan. It has since spread throughout the United States and has local chapters in nearly every State in the United States. Trout Unlimited History and Profile Trout Unlimited was established in 1959 along the banks of Michigan's Au Sable River by a group of 16 anglers who were interested in protecting trout in that and other popular fishing rivers. Founders included Art Neumann and George Griffith, creator of the popular fly pattern Griffith's Gnat. The first president was Dr. Casey E. Westell Jr. Neumann was the first vice president. TU is a national organization with more than 150,000 formal members organized into about 400 chapters in nearly every state. The organization's annual budget is approximat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colorado Division Of Minerals And Geology
Colorado (, other variants) is a state in the Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains. Colorado is the eighth most extensive and 21st most populous U.S. state. The 2020 United States census enumerated the population of Colorado at 5,773,714, an increase of 14.80% since the 2010 United States census. The region has been inhabited by Native Americans and their ancestors for at least 13,500 years and possibly much longer. The eastern edge of the Rocky Mountains was a major migration route for early peoples who spread throughout the Americas. "''Colorado''" is the Spanish adjective meaning "ruddy", the color of the Fountain Formation outcroppings found up and down the Front Range of the Rocky Mountains. The Territory of Colorado was organized on February 28, 1861, and on August 1, 1876, U.S. President Ulysses S. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fingerling (fish)
Fish go through various life stages between fertilization and adulthood. The life of a fish start as spawned eggs which hatch into immotile larvae. These larval hatchlings are not yet capable of feeding themselves and carry a yolk sac which provides stored nutrition. Before the yolk sac completely disappears, the young fish must mature enough to be able to forage independently. When they have developed to the point where they are capable of feeding by themselves, the fish are called fry. When, in addition, they have developed scales and working fins, the transition to a juvenile fish is complete and it is called a fingerling, so called as they are typically about the size of human fingers. The juvenile stage lasts until the fish is fully grown, sexually mature and interacting with other adult fish. Growth stages Ichthyoplankton ''(planktonic or drifting fish)'' are the eggs and larvae of fish. They are usually found in the sunlit zone of the water column, less than 200 met ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Hatchery
A fish hatchery is a place for artificial breeding, hatching, and rearing through the early life stages of animals—finfish and shellfish in particular.Crespi V., Coche A. (2008) Food and Agriculture Organization of the United Nations (FAO) Glossary of Aquacultur/ref> Hatcheries produce Fish larva, larval and juvenile fish, shellfish, and crustaceans, primarily to support the aquaculture industry where they are transferred to on-growing systems, such as fish farms, to reach harvest size. Some species that are commonly raised in hatcheries include Pacific oysters, shrimp, Indian prawns, salmon, tilapia and scallops. The value of global aquaculture farming is estimated to be US$98.4 billion in 2008 with China significantly dominating the market; however, the value of aquaculture hatchery and nursery production has yet to be estimated. Additional hatchery production for small-scale domestic uses, which is particularly prevalent in South-East Asia or for conservation programmes, ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Kill
The term fish kill, known also as fish die-off, refers to a localized die-off of fish populations which may also be associated with more generalized mortality of aquatic life.University of Florida. Gainesville, FL (2005) ''Plant Management in Florida's Waters.'' The most common cause is reduced oxygen in the water, which in turn may be due to factors such as drought, algae bloom, overpopulation, or a sustained increase in water temperature. Infectious diseases and parasites can also lead to fish kill. Toxicity is a real but far less common cause of fish kill. Fish kills are often the first visible signs of environmental stress and are usually investigated as a matter of urgency by environmental agencies to determine the cause of the kill. Many fish species have a relatively low tolerance of variations in environmental conditions and their death is often a potent indicator of problems in their environment that may be affecting other animals and plants and may have a direct impact ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lower Terminal, Old Romley Tram, CO
{{Disambiguation ...
Lower may refer to: *Lower (surname) *Lower Township, New Jersey *Lower Receiver (firearms) *Lower Wick Gloucestershire, England See also *Nizhny Nizhny (russian: Ни́жний; masculine), Nizhnyaya (; feminine), or Nizhneye (russian: Ни́жнее; neuter), literally meaning "lower", is the name of several Russian localities. It may refer to: * Nizhny Novgorod, a Russian city colloquial ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
