{"id":109836,"date":"2015-09-03T16:28:49","date_gmt":"2015-09-03T22:28:49","guid":{"rendered":"https:\/\/dh.durangoherald.com\/tj\/mining-reclamation-may-be-a-pipe-dream\/"},"modified":"2015-09-03T16:28:49","modified_gmt":"2015-09-03T22:28:49","slug":"mining-reclamation-may-be-a-pipe-dream","status":"publish","type":"post","link":"https:\/\/dh.durangoherald.com\/tj\/mining-reclamation-may-be-a-pipe-dream\/","title":{"rendered":"Mining reclamation may be a pipe dream"},"content":{"rendered":"\n

\"Water
Water flows through a series of retention ponds built to contain and filter heavy metals and chemicals from the Gold King Mine wastewater accident. The funding and technology needed to perform proper reclamation work at thousands of leaky mines is lacking, according to Ron Cohen, a professor of civil and environmental engineering at Colorado School of Mines.<\/span>Brennan Linsley\/Associated Press file photo<\/span><\/figcaption><\/figure>\n<\/p>

DENVER \u2013 Despite cries for a focus on reclamation following the Gold King Mine spill, restoring thousands of inactive mines across Colorado and the nation may prove difficult, if not logistically impossible.<\/p>\n

Ron Cohen, a professor of civil and environmental engineering at Colorado School of Mines, said the technology and funding is lacking to properly perform the reclamation work needed.<\/p>\n

\u201cThe reality is, and my prediction is, that this is going to be a problem for a long, long time,\u201d Cohen said. He has been briefing federal lawmakers on oversight following the Gold King disaster. \u201cIs there political will in the federal government now to come up with more monies for cleanup? I don\u2019t think that\u2019s going to happen.\u201d<\/p>\n

There has been a refocus on reclamation in the wake of the Gold King incident, in which an error by an Environmental Protection Agency-contracted team on Aug. 5 sent an estimated 3 million gallons of orange old mining sludge into the Animas River. The water initially tested for spikes in heavy metals, including lead, arsenic, cadmium, aluminum and copper.<\/p>\n

It isn\u2019t the first time Colorado has seen its rivers turn orange because of spills from an old mining operation. Each time an incident occurred, the focus was shifted to reclamation, yet the pervasive problem lingers.<\/p>\n

Part of the dilemma has to do with money. Estimates place national reclamation of inactive mines as high as $54 billion. Mining laws that govern the industry in the United States date back 143 years. The federal government is prohibited from collecting royalties on much of hard-rock mining, thereby leaving the coffers dry for reclamation.<\/p>\n

Congress is expected to take up legislation that would allow the government to collect royalties, though the measure faces an uphill battle in a Congress plagued by political gridlock. Even still, there is the underlying issue of inadequate technology to address.<\/p>\n

Reclamation work remains a pretty rudimentary process. For cleanup crews to really make a long-lasting impact, they must get beyond the opening of the mine. Back during the mining boom of the late 19th century and early 20th century, there was little engineering. Dams were installed, including a pile of material, and behind it was waste products, residual water and chemicals.<\/p>\n

\u201cYou\u2019re looking at the potential of these sort of hastily put together dams bursting, and the older they get, the more frequently that\u2019s going to occur,\u201d Cohen said.<\/p>\n

For a mine to be properly restored, workers must address the waste rock pile, which includes all the rock that didn\u2019t have enough ore to be worthy of processing. This material likely has a lot of pyrite in it, which can make acid mine drainage after it mixes with oxygen and water. This material is on the land surface.<\/p>\n

There\u2019s also tailings storage to address, which is the waste from processing the ore that took place to harvest metals. This fine texture also is on the land surface.<\/p>\n

The waste piles \u2013 built on top of local soil \u2013 contained no liners and can be more than 1,000 acres large and taller than 300 feet.<\/p>\n

\u201cThe idea was make gravity your friend. If we can dump it down someplace, rather than haul it far and up, we\u2019re in business, and it\u2019s less costly,\u201d Cohen explained. \u201cIn the old days, that was their modus operandi.\u201d<\/p>\n

These waste piles must be moved to a place that has been properly prepared in a large pit lined with clay or a high-density polyethylene liner. A neutralizing material \u2013 like lime \u2013 is placed on the bottom of the acid-generating material and then on top of it. It is topped with another clay liner to spur vegetative growth. Some call it the \u201ctailings burrito.\u201d<\/p>\n

But these pits will likely fail eventually, and there is usually a body of water running through it, which is problematic for water quality.<\/p>\n

Often, a bulkhead, or reinforced concrete plug, is constructed at the mine opening. But this is a temporary solution at best. As Cohen pointed out, \u201cwater has this nasty habit of finding the path of least resistance.\u201d The water simply finds its way through other openings, such as fractures in rock.<\/p>\n

The bulkhead is really just a way to delay while money is sought for more permanent reclamation work. The ultimate solution is a treatment facility that could cost as much as $20 million to construct and another $1.5 million per year to operate 24 hours a day. The facility usually must be built at high altitudes in remote, difficult terrain.<\/p>\n

But with a treatment facility, workers can control pipes in the bulkhead and adjust the flow of water so that it can be treated, offering a more permanent solution.<\/p>\n

The EPA said that it is exploring building a treatment facility near Gold King in the wake of the spill. Groups have been calling for a treatment facility in the Upper Animas Mining District for years. Pollution from inactive mines has long contaminated Cement Creek near Silverton, which runs into the Animas. A treatment plant operated in the 1990s. But in 2004, the water-treatment facility was shut down.<\/p>\n

In the meantime, EPA officials said water from Gold King is being captured and treated at a system of impoundments before being discharged to Cement Creek. Authorities have constructed four ponds at the mine site, which are treating water to remove as much metal loading as possible.<\/p>\n

As Cohen pointed out, the government has few options.<\/p>\n

\u201cEven some of these treatment systems, what you see is these very basic systems,\u201d he said. \u201cWe\u2019re talking about a hole in the ground that\u2019s lined where you throw some lime in. That\u2019s only going to go so far.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"

Financial, technological hurdles slow progress<\/p>\n","protected":false},"author":1,"featured_media":109837,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5736,5735],"tags":[304,21,174,781,13,435,239],"naviga_topic":[],"class_list":["post-109836","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-local-news","category-news","tag-animas-river","tag-cortez","tag-environmental-cleanup","tag-environmental-politics","tag-frontpage-lead","tag-metal-and-mineral","tag-mining"],"acf":[],"author_name":"dh_admin","_links":{"self":[{"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/posts\/109836","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/comments?post=109836"}],"version-history":[{"count":0,"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/posts\/109836\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/media\/109837"}],"wp:attachment":[{"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/media?parent=109836"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/categories?post=109836"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/tags?post=109836"},{"taxonomy":"naviga_topic","embeddable":true,"href":"https:\/\/dh.durangoherald.com\/tj\/wp-json\/wp\/v2\/naviga_topic?post=109836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}