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The Central City/Black Hawk Historic District (formerly just the Central City Historic District) is a National Historic Landmark District that encompasses the developed areas of Central City and Black Hawk, Colorado. They are adjacent former gold mining camps in the Front Range of the Rocky Mountains in Gilpin County, Colorado, United States. For a time, the area was known as the Richest Square Mile on Earth,[3] and was the largest urban area of the Colorado Territory in the 1870s.
The district was designated a National Historic Landmark on July 4, 1961, for its well-preserved early mining community architecture and history.[2][4][5]
By the middle of July 1859, between 20,000 and 30,000 people were living in and around Gregory Gulch.
Regardless of the type of raw material, its extraction always comes with an environmental cost. Most mining leaves a lasting and damaging environmental footprint. For example, during the extraction of common metals like copper, lead or zinc from the earth both metal-bearing rock, called ore, and “overburden”, the dirt and rock that covers the ore are removed. At a typical copper mine around 125 tonnes of ore are excavated to produce just one tonne of copper. The amount of earth moved is mind-boggling and mining now strips more of the Earth's surface each year than does natural erosion.
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This photo has been graciously provided to be used in the GRID-Arendal resources library by: Philippe Rekacewicz, UNEP/GRID-Arendal
2013 Fortune Global Forum
FORTUNE MPW BREAKFAST: WOMEN, POWER, AND THE EMERGING WORLD Presented by J.P. Morgan and Zurich Insurance Group Fu River Room, Shangri-La HotelNETWORKING BREAKFASTIntroduction: Jing Ulrich, Managing Director and Chairman, Global Markets, China, J.P. MorganInterview: Yang Lan, Chairperson, Sun Media GroupModerator: Stephanie Mehta, Deputy Managing Editor, and Co-chair, 2013 Global Forum, FortuneMPW PANEL: CROUCHING TIGERSPanelists: Deborah Lehr, Vice Chairman, Paulson Institute Bridgette Radebe, Executive Chairperson, Mmakau Mining Huaying Zhang, Vice President, Sustainability for Greater China and Korea, The Coca-Cola CompanyModerator: Jennifer Reingold, Senior Editor, Fortune
Small crane made for the technic challenge. Couldn't participate tho due to a lighting strike... (didn't have internet for a couple of days)
Downcast shaft at Daw Mill colliery in Warwickshire. This is the largest colliery in the UK, mining a five-metre thick section of the Warwickshire Thick seam some 750 metres below the ground. The shafts here are 558 metres and 556 metres deep. In 1982, a drift was completed and all coal is now brought out this way.
I saw countless miles of burning jungle in Sierra Leone. Down the road from this shot, I met some men with machetes in hand who were working adjacent to the searing flames. I had always figured the burns were part of slash-and-burn agriculture. I was wrong. They were clearing land for diamond mining.
"First we burn, then we dig," the man told me.
More of the story at www.adamcohn.com/west-africa/sierra-leone/index.htm
President Cyril Ramaphosa at the 2022 Investing in Africa Mining Indaba at the Cape Town International Convention Centre under the theme “Evolution of African Mining”.(Photo: GCIS)
Compared to many open pit operations, Hanna Nickel used small shovels and trucks. I believe these we 75 ton trucks and the shovels were not very large compared to the iron ore operations and coal operations I had the privilege to be associated with. The ore content was about 1% nickel and there were truck mounted analysis labs that tested the ore content of what was being mined. If "higher" grade ore was found in a pocket it was mixed with lower grade ore to allow a consistant product to be sent to the smelting operation at the bottom of the hill.
These are the doors to the water tunnel from the Oak Hill Colliery. Under this mountain is said to be and indoor lake and here is where the overflow escapes from. Duncott, PA. Photographed 12-29-11.
A 22-image photomosaic (two rows of 11 shots) shot on 25-May-2016. All images were shot handheld with a Lumix G7 camera with a Lumix 12-35mm f2.8 lens at f11 and varying shutter speeds to maintain exposure. ISO 400.
President Cyril Ramaphosa delivers the keynote address at the 2022 Investing in Africa Mining Indaba at the Cape Town International Convention Centre under the theme “Evolution of African Mining”.(Photo: GCIS)
out your bone marrow
false promises
dead oceans
wasteland trinkets
STOP SEABED MINING
Poster designed by artist Nigel Brown.
10 minute photo challenge
Looking for larch on FS 7324
Blewett Pass Washington USA
four different sections of round table mining claim here
looking for gold
Brent and I assembling our mining rig with two ASUS Radeon R9 290s. Watch the time-lapse of the assembly vimeo.com/84810174
Working groups meetings in the Takyiman, Kwaebibirem Municipality.
Photo by CIFOR
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Longwall coal mining of the Dendrobium mine causing severe subsidence and the cracking of a creek bed.
Credit: Kate Smolski/NCC
A small piece of LTV's taconite processing plant at Erie Mining Company, Hoyt Lakes, Minnesota. Polymet, a mining company with a fairly large northern Minnesota property, plans to use the plant for processing copper and other non-ferrous ores.
Taken during the recent convention of the Missabe Railroad Historical Society.
Title: Mining Engineering Department's Diamond Drill Testing
Date: 1898
Description: Researchers under the guidance of a professor are testing a diamond drill for Iowa State College's Department of Mining Engineering, 1898.
ID: 11-04-F.ChemEng.836-01-05
This work has been identified as being free of known restrictions under U.S. copyright law, including all related and neighboring rights. The organization that has made this item available believes that the item is in the Public Domain under the laws of the United States, but a determination was not made as to its copyright status under the copyright laws of other countries. (CC Public Domain 1.0 and RightsStatements.org NoC-US 1.0). The original object is available at the Iowa State University Library Special Collections and University Archives (archives@iastate.edu). To request higher resolution reproductions of the original visit our website.