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Coldwater Creek (Missouri River Tributary)
Coldwater Creek (also Cold Water Creek) is a 19-mile tributary of the Missouri River in north St. Louis County in the U.S. state of Missouri. It is known to be contaminated with radioactive wastes. Location The creek begins in a small spring-fed lake in Overland, then flows north through the towns of Breckenridge Hills, St. Ann and Bridgeton, before entering a culvert underneath Lambert International Airport. North of the airport, it flows northeast through the cities of Hazelwood, Berkeley, Florissant, Old Jamestown, Black Jack, and Spanish Lake. According to ''St. Louis Magazine'', "It runs past schools, golf courses, and soccer fields." The creek terminates in the Missouri River between the Lewis Bridge and the Columbia Bottom Conservation Area. History The name "Coldwater Creek" is a translation of the original French name ''Rivière de L'eau Froide''. The Spaniards called it Rio Fernando, Spanish for "Ferdinand River." The French also called it Riviere aux Bi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tributary
A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage basin of its surface water and groundwater, leading the water out into an ocean. The Irtysh is a chief tributary of the Ob river and is also the longest tributary river in the world with a length of . The Madeira River is the largest tributary river by volume in the world with an average discharge of . A confluence, where two or more bodies of water meet, usually refers to the joining of tributaries. The opposite to a tributary is a distributary, a river or stream that branches off from and flows away from the main stream. PhysicalGeography.net, Michael Pidwirny & S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louisiana (New France)
Louisiana (french: La Louisiane; ''La Louisiane Française'') or French Louisiana was an administrative district of New France. Under French control from 1682 to 1769 and 1801 (nominally) to 1803, the area was named in honor of King Louis XIV, by French explorer René-Robert Cavelier, Sieur de la Salle. It originally covered an expansive territory that included most of the drainage basin of the Mississippi River and stretched from the Great Lakes to the Gulf of Mexico and from the Appalachian Mountains to the Rocky Mountains. Louisiana included two regions, now known as Upper Louisiana (), which began north of the Arkansas River, and ''Lower Louisiana'' (). The U.S. state of Louisiana is named for the historical region, although it is only a small part of the vast lands claimed by France.La Louisiane française 1682-1803 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polonium
Polonium is a chemical element with the symbol Po and atomic number 84. Polonium is a chalcogen. A rare and highly radioactive metal with no stable isotopes, polonium is chemically similar to selenium and tellurium, though its metallic character resembles that of its horizontal neighbors in the periodic table: thallium, lead, and bismuth. Due to the short half-life of all its isotopes, its natural occurrence is limited to tiny traces of the fleeting polonium-210 (with a half-life of 138 days) in uranium ores, as it is the penultimate daughter of natural uranium-238. Though slightly longer-lived isotopes exist, they are much more difficult to produce. Today, polonium is usually produced in milligram quantities by the neutron irradiation of bismuth. Due to its intense radioactivity, which results in the radiolysis of chemical bonds and radioactive self-heating, its chemistry has mostly been investigated on the trace scale only. Polonium was discovered in July 1898 by Marie SkÅ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isotopes Of Lead
Lead (82Pb) has four stable isotopes: 204Pb, 206Pb, 207Pb, 208Pb. Lead-204 is entirely a primordial nuclide and is not a radiogenic nuclide. The three isotopes lead-206, lead-207, and lead-208 represent the ends of three decay chains: the uranium series (or radium series), the actinium series, and the thorium series, respectively; a fourth decay chain, the neptunium series, terminates with the thallium isotope 205Tl. The three series terminating in lead represent the decay chain products of long-lived primordial 238U, 235U, and 232Th, respectively. However, each of them also occurs, to some extent, as primordial isotopes that were made in supernovae, rather than radiogenically as daughter products. The fixed ratio of lead-204 to the primordial amounts of the other lead isotopes may be used as the baseline to estimate the extra amounts of radiogenic lead present in rocks as a result of decay from uranium and thorium. (See lead–lead dating and uranium–lead dating). The longes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hazelwood School District
Hazelwood School District (HSD) is a school district in suburban St. Louis, Missouri and is the second largest district in St. Louis County. The District extends from I-70 on the west and the I-270 bridge on the east, covering 78 square miles, an area larger than the City of St. Louis. Its northern and southern boundaries are the two Great Rivers, the Missouri and the Mississippi, and I-270. The District covers a large portion of north St. Louis County, Missouri, including all of Black Jack and Spanish Lake. Additionally it includes portions of: Bellefontaine Neighbors, Berkeley, Bridgeton, Dellwood, Ferguson, Florissant, Glasgow Village, Hazelwood, and Old Jamestown. The district is headquartered in an unincorporated area. Faculty and staff educate more than 18,000 students in the District's 20 elementary schools, six middle schools and three high schools, plus separate campuses for early childhood, gifted, and individualized learning. The Hazelwood School Distric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centers For Disease Control And Prevention
The Centers for Disease Control and Prevention (CDC) is the national public health agency of the United States. It is a United States federal agency, under the Department of Health and Human Services, and is headquartered in Atlanta, Georgia. The agency's main goal is the protection of public health and safety through the control and prevention of disease, injury, and disability in the US and worldwide. The CDC focuses national attention on developing and applying disease control and prevention. It especially focuses its attention on infectious disease, food borne pathogens, environmental health, occupational safety and health, health promotion, injury prevention and educational activities designed to improve the health of United States citizens. The CDC also conducts research and provides information on non-infectious diseases, such as obesity and diabetes, and is a founding member of the International Association of National Public Health Institutes. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thorium-230
Thorium (90Th) has seven naturally occurring isotopes but none are stable. One isotope, 232Th, is ''relatively'' stable, with a half-life of 1.405×1010 years, considerably longer than the age of the Earth, and even slightly longer than the generally accepted age of the universe. This isotope makes up nearly all natural thorium, so thorium was considered to be mononuclidic. However, in 2013, IUPAC reclassified thorium as binuclidic, due to large amounts of 230Th in deep seawater. Thorium has a characteristic terrestrial isotopic composition and thus a standard atomic weight can be given. Thirty-one radioisotopes have been characterized, with the most stable being 232Th, 230Th with a half-life of 75,380 years, 229Th with a half-life of 7,917 years, and 228Th with a half-life of 1.92 years. All of the remaining radioactive isotopes have half-lives that are less than thirty days and the majority of these have half-lives that are less than ten minutes. One isotope, 229Th, has a nucl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
McCluer North High School
McCluer North High School (founded 1971) is a public school in Florissant, Missouri, United States in the St. Louis metropolitan area. The McCluer North campus is centrally located in the Ferguson-Florissant School District. Located in a residential area, the campus is bounded by Waterford Drive, St. Catherine and Parker Road. Facing the site is the Florissant Civic Center and its park-like setting. Immediately adjacent are the former District Administrative Offices that included services for students and families in the Community School Program, PROBE Gifted Program, comprehensive Early Education services and the Child Development Center, a professionally run day care center that operates in conjunction with McCluer North's Child Development classes. On the Parker Road side of the campus, McCluer North backs up to Parker Road Elementary School. McCluer North was designed to provide adaptable and flexible space for a variety of instructional activities that include large-group ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superfund
Superfund is a United States federal environmental remediation program established by the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA). The program is administered by the United States Environmental Protection Agency, Environmental Protection Agency (EPA). The program is designed to investigate and clean up sites contaminated with hazardous substances. Sites managed under this program are referred to as "Superfund" sites. There are 40,000 federal Superfund sites across the country, and approximately 1,300 of those sites have been listed on the National Priorities List (NPL). Sites on the NPL are considered the most highly contaminated and undergo longer-term remedial investigation and remedial action (cleanups). The EPA seeks to identify parties responsible for hazardous substances released to the environment (polluters) and either compel them to clean up the sites, or it may undertake the cleanup on its own using the Superfund (a trust ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Superfund Sites In Missouri
This is a list of Superfund sites in Missouri designated under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) environmental law. The CERCLA federal law of 1980 authorized the United States Environmental Protection Agency (EPA) to create a list of polluted locations requiring a long-term response to clean up hazardous material contaminations.P.L. 96-510, (), December 11, 1980. These locations are known as Superfund sites, and are placed on the National Priorities List (NPL). The NPL guides the EPA in "determining which sites warrant further investigation" for environmental remediation. As of May 1, 2010, there were thirty Superfund sites on the National Priorities List in Missouri. One more site has been proposed for entry on the list and five others have been cleaned up and removed from it. Superfund sites : : See also *List of Superfund sites in the United States *TOXMAP References {{Missouri Missouri Superfund Superfund is a Uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Lake Landfill
West Lake Landfill is a closed, unlined mixed-waste landfill located in Bridgeton, Missouri. It was featured in the 2015 documentaries ''The First Secret City'', ''The Safe Side of the Fence'' and the 2017 HBO documentary ''Atomic Homefront''. Its contents have been shown to include radioactive waste; it is thus also an EPA Superfund cleanup site. History The West Lake Landfill site originated in 1939 as a limestone quarry operated by the Westlake Quarry Company. Landfilling at the site began in the 1950s. In 1973, after having changed hands (and responsible oversight) several times, B&K Construction Co., a company contracted by Cotter Corporation, dumped a portion of the original stored radioactive material at a nearby storage facility. 8,700 short tons (7,900 tonnes) of leached barium sulfate, the material with the lowest relative radioactivity, was combined with 39,000 short tons (35,000 t) of topsoil to dilute the contaminated material at the landfill. The leached barium sulf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Environmental Protection Agency
The Environmental Protection Agency (EPA) is an independent executive agency of the United States federal government tasked with environmental protection matters. President Richard Nixon proposed the establishment of EPA on July 9, 1970; it began operation on December 2, 1970, after Nixon signed an executive order. The order establishing the EPA was ratified by committee hearings in the House and Senate. The agency is led by its administrator, who is appointed by the president and approved by the Senate. The current administrator is Michael S. Regan. The EPA is not a Cabinet department, but the administrator is normally given cabinet rank. The EPA has its headquarters in Washington, D.C., regional offices for each of the agency's ten regions and 27 laboratories. The agency conducts environmental assessment, research, and education. It has the responsibility of maintaining and enforcing national standards under a variety of environmental laws, in consultation with state, tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
