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The Berkeley Pit is a former open pit copper mine located in Butte, Montana, United States. It is one mile long by half a mile wide with an approximate depth of 1,780 feet (540 m). It is filled to a depth of about 900 feet (270 m) with water that is heavily acidic (2.5 pH level), about the acidity of cola or lemon juice. As a result, the pit is laden with heavy metals and dangerous chemicals that leach from the rock, including arsenic, cadmium, zinc, and sulfuric acid.
The mine was opened in 1955 and operated by Anaconda Copper and later by the Atlantic Richfield Company (ARCO), until its closure in 1982. When the pit was closed, the water pumps in the nearby Kelly shaft, at a depth of 3,800 feet, were turned off, and groundwater from the surrounding aquifers began to slowly fill the pit, rising at about the rate of one foot a month. Since the pit closure on Earth Day 1982, the level has risen to within 150 feet of the natural groundwater level.
Over the weekend I worked out a new wireless video downlink for my pole aerial photography rig. Late Sunday I made a stop by the Berkeley Skate Park at Harrison Park. It was fun shooting the young guys and their daring do especially for the shadows on the park’s convoluted ground.
I will post a few images of the pole camera cradle within the next couple of days.
The Berkeley Pit is a former open pit copper mine located in Butte, Montana, USA, about a mile and a half wide and about 1,780 feet deep. It contains about 900 feet of water that is heavily acidic, with a pH level of 2.5, and laden with heavy metals and dangerous chemicals such as arsenic, cadmium, zinc, and sulfuric acid.
The mine was opened in 1955 and operated by the Anaconda Mining Company and later by the Atlantic Richfield Company (ARCO), until its closure in 1982. When the pit was closed, the water pumps at the bottom were removed, and groundwater sourced from the surrounding aquifers soon filled the pit to the natural groundwater level.
This has presented an environmental problem in that the water, with dissolved oxygen, allows pyrite and sulfide minerals in the ore and wall rocks to decay, releasing acid. The acidic water in the pit can carry a heavy load of dissolved heavy metals. The water contains so much dissolved metal (up to 187 ppm Cu) that "mining" of the water is actually done.
In the 1990s plans were devised for solving the groundwater problem. The Berkeley Pit has since become one of the largest Superfund sites.
Berkeley, CA December 3, 1964: Twenty-one year old Mario Savio addresses a crowd of students in Sproul Hall at the University of California. Savio,who is the leader of a huge demonstration on campus is protesting the university's disciplinary actions being taken against four student free-speech leaders. In this photo he was giving instructions to students on passive resistance as Sproul Hall was locked up last night when students took over the building. Mario Savio, a Manhattan-born philosophy major, is one of the four against whom disciplinary action is being taken by university officials.
BERKELEY, CA - June 2 - American Heart Association Networking Event - Berkeley on June 2nd 2022 at 2050 University Ave in Berkeley, CA (Photo - Devlin Shand for Drew Altizer Photography)
The castle dates from the 12th Century. It was here, in 1327, that the deposed King Edward II was imprisoned and brutally murdered in a plot contrived by Edward's wife (the French princess Isabella), and her lover, Mortimer. The castle was "slighted", (made incapable of defense) during the English Civil War.
Over the weekend I worked out a new wireless video downlink for my pole aerial photography rig. Late Sunday I made a stop by the Berkeley Skate Park at Harrison Park. It was fun shooting the young guys and their daring do especially for the shadows on the park’s convoluted ground.
I will post a few images of the pole camera cradle within the next couple of days.
Berkeley 60 is a trumpler (en.wikipedia.org/wiki/Trumpler_classification) class IV 2 p open cluster approximately 12,100 light-years away in Cassiopeia.
Luminance – 25x300s – binned 1x1 – 125 minutes
RGB – 8x180s – 24 minutes each – binned 2x2
187 minutes total exposure – 3 hours 7 minutes
Imaged January 28th and 29th, 2020 and October 7th, 2023 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.
See my full Berkeley Open Clusters album here - www.flickr.com/photos/dcrowson/albums/72157711466876833/.
Students and families celebrate during the Class of 2022 Berkeley School of Law Graduation on Friday, May 13, 2022.