In a single day, these bubbling mudboils spew 20 tons of silt and sand into the creek and all the way down into Onondaga Lake. The sediment causes a number of problems beyond making the stream unsuitable for trout. It builds up to 4 feet near the lake, which could be causing some of the flooding in Syracuse seen in the past few years. It also flows into Onondaga Lake, degrading water quality in a lake that the county and Honeywell have poured at least $1 billion into cleaning up.
The result was the accelerated discharge from increasingly active mudboils. A mudboil is not a common phenomenon in nature. It is quite rare, occurring only where pressurized groundwater penetrates upward through overlying materials with enough velocity to transport sediments along with it. Mudboils are so rare that scientists have been coming to Onondaga Creek to study them for decades, providing ample information over time. ?The first documented mudboil erupted in Tully Valley in the late 1880s, just years after solution mining began.? And since most of this pressured water was passing through the deep salt chambers, the Tully mudboils are particularly unique because over time they came to reflect the brine pressure source and became very salty.
Akron, Ohio, based FirstEnergy Corp. has agreed to pay a $230 million fine for its central role in a bribery scheme — the goal of which was to get legislation passed that included a $1 billion bailout for two of its power plants in Ohio.
Federal prosecutors charged FirstEnergy with conspiring to commit honest services wire fraud.
The average sized 100MW solar farm hosting around 300,000 to +400,000 solar panels (modules) will generally have over 1,000,000 physical made electrical terminations. Each one of these terminations operates at around 1500 Volts and each termination could fail.
Electrical equipment failure is well known to be linked to situations where we can observe abnormally high temperatures. Fire, sparking, arching or melting exposes electrical equipment to further damage and degradation exacerbated as moisture ingress occurs. Electrical failure can occur due to various factors and although the commonly seen issue will generally arise due to high resistive joints it is not uncommon to observe how the environment impacts equipment overtime. Electrical termination temperatures can reach over 120° Celsius, under these conditions, equipment will begin to deteriorate, over time plastics will have already begun to deform or melt and visible signs or smells will be present. Mismanagement, poor quality equipment and installation practices or lack of scheduled maintenance is generally what leads to these situations. Thorough and regular maintenance procedures can control these issues including addressing performance degradation, system dropouts, inverter failure/faults and lost yield.
U.S. coal production totaled 535 million short tons (MMst) in 2020, a 24% decrease from the 706 MMst mined in 2019 and the lowest level of coal production in the United States in any year since 1965.
The decline of U.S. coal production in 2020 was largely the result of less demand for coal internationally and less U.S. electric power sector demand for coal. Lower natural gas prices made coal less competitive for power generation. U.S. coal-fired generation fell 20% from 2019. Natural gas prices started 2020 relatively low because mild winter weather led to less natural gas demand for space heating, and prices remained low as the economic effects of the COVID-19 pandemic reduced both natural gas production and consumption.
U.S. coal exports were 26% lower in 2020 than they were in 2019. The COVID-19 pandemic slowed global demand for coal, and some U.S. coal mines were idled for extended periods to slow the spread of the virus among workers. Coal exports decreased significantly in April 2020 as the United States and countries around the world responded to the pandemic.
The Clean Air Act of 1970 restricted sulfur emissions from new coal-fired power plants. One way for coal plants to meet the emissions regulations was to use subbituminous coal, which has a lower sulfur content than other coal types. This change, along with the oil shortages and the resulting high oil prices of the 1970s that made coal more economical, contributed to the expansion of mining and the development of large, open-pit coal mines in the Powder River Basin (located in Northeast Wyoming and Southeast Montana), where the majority of subbituminous coal in the United States is found. One of the largest U.S. coal-producing mines by volume, Black Thunder, opened in Wyoming in 1977. Today, the Powder River Basin accounts for approximately 43% of all coal produced in the United States.
2020 was a good year for the War on Coal. Must be because Trump Digs Coal.
Michigan has small deposits of coal, although many of our coal deposits are in thin seams, and not economically valuable for that reason.
The swamp forests of the Pennsylvanian stored many forms of usable wealth. The sands at the bottom of the swamp, now hardened into the Parma sandstone, are a prominent reservoir for fresh water in central Michigan counties; in a small area natural gas has been obtained from it. The trees of the forest died, were buried, and became the coal of the Saginaw valley, Grand Ledge, Shiawassee, Ingham, and Jackson counties. The coal is a bit difficult to use in the ordinary furnace, but with the proper type furnace and proper firing methods, it burns well.
What was the Pennsylvanian environment, during which these coal deposits formed, like? Slow, gentle crustal movements caused the Mississippian seas to almost retreat from Michigan, leaving a shallow pool in the central part of the basin and cut off from the outside sea. The time was the Pennsylvanian, the last 45 million years of the Carboniferous, and the time of the great coal swamps. Sedimentation was partly marine, partly fresh or brackish water in swamps. A layer of sparkling sand was first spread over the last Mississippian limestone and above this in the shallow waters a luxuriant swamp forest flourished --- but the trees were quite unlike our modern trees. They were giant fern trees, ground pines, and horsetail rushes that grew to 10 meters or more in height. No birds or butterflies or flowers were there, but dark loathsome amphibians and the earliest known reptiles crawled in the muds; giant scorpions and dragonflies flew about. The climate was warm and moist. The swamp vegetation died and fell to the swamp floor, layer upon layer of plant remains accumulated, changed to peat, were buried under a blanket of dark muds which slow streams brought from forest covered lands. Thus protected from oxygen, they have become the coal beds and shales of the central counties.