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Environment: Judge upholds EPA’s review of proposed Pebble Mine, near Bristol Bay, Alaska

Salmon fisheries at risk with open-pit mine proposal

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The EPA will be allowed to do a thorough evaluation of the impacts of a proposed copper mine in Alaska’s Bristol Bay, a federal judge has ruled.

By Bob Berwyn

FRISCO — A federal judge Friday ruled that the EPA can proceed with an environmental review of a proposed copper mine in Alaska’ pristine Bristol Bay.

U.S. District Court Judge H. Russel Holland rejected arguments that the EPA exceeded its authority by starting the review process in the absence of a specific permit application, and that the review violates the Alaska Statehood Act.

At issue is the proposed Pebble Mine, which would, according to environmental groups, become the largest copper mine in the world, potentially tainting huge areas of productive salmon habitat with dredged material and other pollutants. Continue reading

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Climate: EPA eyes limits on airline carbon pollution

U.S. airlines have long lobbied against any measures aimed at cutting greenhouse gas emissions from aircraft, but they probably won't be able to dodge new EPA pollution regulations developed under the authority of the Clean Air Act.

U.S. airlines have long lobbied against any measures aimed at cutting greenhouse gas emissions from aircraft, but they won’t be able to dodge new EPA pollution regulations developed under the authority of the Clean Air Act.

Agency targets spring 2016 to make initial findings

By Bob Berwyn

FRISCO — U.S. airlines may soon be required to at least start thinking about cutting their carbon footprint.

Aviation accounts for about 11 percent of carbon dioxide emissions from the U.S. transportation sector and is one of the fastest-growing sources of carbon pollution, rising between 3 percent to 5 percent a year. Carbon emissions from global aviation will quadruple by mid-century without action. Continue reading

EPA to study pesticide impacts to endangered species

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How do pesticides affect wildlife? We’ll know more after a court-ordered environmental study.

Legal settlement requires agency to analyze effects of 5 common pesticides

Staff Report

FRISCO — Under legal pressure from conservation advocates, the EPA last week agreed to take a hard look at how five commonly used pesticides affect endangered animals across the U.S.

One of the pesticides is carbaryl, commonly used in massive quantities in Colorado to try and protect trees from bark beetles. The other pesticides to be reviewed are chlorpyrifos, diazinon, malathion and methomyl. All have all been found to be toxic to wildlife and may pose a health risk to humans. Continue reading

Colorado: Builder fined $310,000 for stormwater runoff violations at Air Force Academy

Meadow Creek, near Frisco, Colorado, raging with spring runoff.

Tainted stormwater runoff is a significant threat to water quality in many Colorado streams.

EPA tackling major violations around the country

Staff Report

FRISCO — A Colorado construction company has been fined $310,000 after multiple failures to comply with an EPA stormwater permit. The civil penalty is outlined in a settlement agreement sanctioned by the U.S. District Court for Colorado.

Under the settlement, Hunt Building has agreed to resolve alleged Clean Water Act violations at two military housing construction sites at the United States Air Force Academy in Colorado Springs, Colo. The violations were discovered during EPA inspections at the site. Continue reading

Environment: Ongoing cleanup tackles toxic Peru Creek

July 30 site visit gives public a chance to see progress in $3 million remediation project at abandoned mine in Summit County

November snow and ice along the Snake River, in Summit County, Colorado.

Heavy metal pollution from upstream sources has killed most aquatic life in the Snake River, near Keystone, Colorado. bberwyn photo.

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Staff Report

FRISCO — With recent increases in levels of toxic metals in Peru Creek, the ongoing remediation work at the abandoned Pennsylvania Mine, near Keystone, Colo., takes on an even greater importance in the context of water quality in the Blue River Basin and the Upper Colorado.

The mine, which produced huge amounts of silver 100 years ago, has been pinpointed as one of the main sources of acid mine drainage. Water seeping through the rocky ground trickles into the old mine workings, picks up contaminants along the way, then percolates back into Peru Creek near the head of the beautiful alpine valley.

During the last couple of summers, scientists and engineers have been working to reduce the pollution, and this coming week (July 30) there will be a public field trip to the site, led by Jeff Graves of the Colorado Division of Reclamation Mining and Safety, as well as other members of the Snake River Task Force. Continue reading

Environment: EPA to take hard look at impacts of proposed open pit mine in Alaska’s Bristol Bay

Agency likely to restrict mining activities based on concerns about impacts to salmon fishery, other resources

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Proposed Alaska mine gets careful EPA scrutiny.

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Staff Report

FRISCO — A proposed mine in coastal Alaskan waters would spread across an area larger than Manhattan and jeopardize the health and sustainability of one of the world’s great salmon fisheries, the EPA said this week, releasing a draft version of its plan for protecting aquatic resources in Bristol Bay from a vast open pit mine.

According to the EPA, the proposed mine in its present form would have unacceptable impacts on Bristol Bay natural resources. As a result, the agency’s draft lays out common sense rules and guidelines that would ensure the integrity of those resources by prohibiting the discharge of any mining materials into critically important waters of the U.S. Continue reading

Colorado: Not much love for proposed new water diversions

EPA raises questions about compliance with Clean Water Act

Denver Water plans to increase transmountain diversions through the Moffat collection system will be up for comment at a pair of upcoming meetings.

Denver Water plans to increase transmountain diversions through the Moffat collection system is not drawing rave reviews, as numerous entities have expressed significant concerns about impacts to water quality. bberwyn photo.

By Bob Berwyn

FRISCO — For all the detailed information in the 16,000-page study for Denver Water’s proposed new water diversions from the Western Slope, there are still more questions than answers, according to formal comment letters filed in the past few weeks.

As currently configured, the proposal to shunt more water from Colorado River headwaters streams to the Front Range could worsen water water quality in many streams that are already feeling the pain of low flows, EPA water experts wrote in a June 9 letter. Continue reading

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