A top U.S. Army official reversed himself on a key decision β a reversal that could bolster Hudbay Minerals Inc.βs legal argument that the washes on its long-delayed Rosemont Mine site donβt merit federal regulation.
Assistant Army Secretary Michael Connor wrote an August 2022 memo withdrawing a decision that had overruled an earlier decision freeing the Rosemont siteβs washes from federal Clean Water Act protection. Connorβs latest decision appears to restore a 2021 Army Corps of Engineers decision that the washes at the Rosemont site arenβt covered by the Clean Water Act.
Despite that, late Friday an Army Corps of Engineers spokeswoman referred in an email to a possibility of enforcement action against Hudbayβs plans to grade washes inside an area of the Santa Rita Mountains south of Tucson thatβs covered by a now-suspended Clean Water Act permit for the Rosemont Mine.
βHudbay has told us they intend to proceed with filling in washes that fall within the permit areas. We are coordinating with EPA on enforcement. Enforcement is discretionary,β Dena OβDell, a spokeswoman for the Corpsβ Los Angeles District, said in the email, without elaborating.
The Corps has already said the EPA was conducting a law enforcement investigation of Hudbayβs grading activities. EPA has declined to comment on it or acknowledge itβs happening.
The Corps hasnβt responded to questions from the Star about the apparent discrepancy between Connorβs August 2022 decision and the agencyβs increasingly aggressive actions regarding Hudbay since then, including a mid-January order that the company stop work on washes lying within the Clean Water Act permit area.
Hudbay: Corps lacks authority over site
Hudbay officials have said repeatedly they donβt believe the Corps has any authority over the site.
Thatβs partly because of the agencyβs earlier decision waiving jurisdiction over the Rosemont site, and partly because the company formally surrendered its permit almost a year ago, the company said.
The Corps, however, hasnβt accepted the validity of Hudbayβs permit surrender, although a federal judge did that in a ruling in May 2022 in refusing an effort by mine opponents to stop Hudbayβs grading of washes in that area.
The Corps, which Connor oversees, had decided in March 2021 that it no longer had any authority over the Rosemont washes. Until then, the agency had relied on a decade-old, preliminary determination asserting its jurisdiction over the washes, which the company proposing the Rosemont Mine had voluntarily accepted.
That earlier, preliminary determination of Corps β jurisdiction was a basis for its March 2019 issuance of a Clean Water Act permit, authorizing the mining company to deposit dredged and fill material into those washes as part of its construction work.
Work on Copper World project
Hudbay has been grading and clearing private land on the west slope area of the Santa Rita Mountains on and off since April 2022, for what it says are future waste rock and tailing disposal areas for its Copper World project. The company owns 4,500 acres on the east and west slopes of the Santa Ritas on which it plans to build four open pits for mining copper and numerous other facilities for processing and other activities.
One of the pits would occupy the same area originally proposed for the Rosemont open pit. With the Rosemont Mine itself now on hold due to an unfavorable federal court ruling, Hudbay has renamed that pit the East Pit.
The Clean Water Act permit area was intended to cover only the original Rosemont Mine site. But it also includes part of the west slope area now due to be mined by Copper World, including a utility corridor through which electricity and water would be delivered to the mine site from the Sahuarita area.
The August 2022 memo outlining Connorβs policy reversal came to light after the Corps issued the stop work order in mid-January 2023. Hudbay replied at the end of January that it did not believe it is legally bound to comply with the order.
Friday, in a statement released to the Star , the mining company said it agrees with Connorβs most recent decision and that his earlier decision of June 2022 βcontradicted established policy and past practice.β
The company also said it believes the Corps lacks authority over that area because the Corps only has jurisdiction over βWaters of the U.S.β Legally, those are rivers, washes and other water courses deemed environmentally and biologically significant enough to merit federal protection.
βThere is no credible evidence that the dry washes on the Copper World site areβ Waters of the U.S., Hudbay said. βTo the contrary, Hudbay has demonstrated that they are not ... and shared this analysis with the (Department of Justice, the Army Corps, tribes, and environmentalists) in April 2022.
βHudbay has studied the ability of the dry washes on the west side to transport contaminants downstream by analyzing stormwater, sediment, and plant samples. These studies show that material from the site is generally only transported 7-8 miles through the flat sandy washes,β the company said in its written statement.
Federal agencies require the existence of a significant connection between a development siteβs normally dry washes and a navigable waterway for the washes to come under federal control. Hudbay said the nearest downstream navigable water is the Colorado River, near Yuma, over 350 miles away.
The Corps and EPA, however, have designated sections of the much closer Santa Cruz River as navigable.
Santa Cruz River role debated
Stu Gillespie, an attorney for three tribes fighting the mine, has sent the Corps two documents making the case that the washes at the original Rosemont site and the larger Copper World site do qualify as βWaters of the U.S.β One is a report the tribes commissioned laying out such arguments. Another is an EPA meno, from 2021, criticizing the Army Corpsβ decision that year that the Rosemont washes donβt qualify as βWaters of the U.S.β
Mark Murphy, a scientist hired by the tribes, concluded that the Rosemont-area washes, βboth individually and in combination with similarly situated streams, have a significant nexusβ with the Santa Cruz.
Murphyβs βconclusion is based on an extensive review of the scientific literature, field observations, on-the-ground data, and watershed modeling. His report summarizes the extensive scientific literature on ephemeral streams and their role in maintaining the Santa Cruz Riverβs ecological integrity,β Gillespie wrote to the Corps in December.
In response, Corps spokeswoman OβDell told the Star, late Friday, βThe Corps is evaluating the information provided by the tribes concerning the March 2021β decision waiving authority over the Rosemont washes.
βNo decision has been made yet to reevaluateβ its determination, she said.
Corps on βvery shaky legal groundsβ
The final, legal impact of Connorβs August 2022 decision on Hudbayβs activities remains unknown, as are Hudbayβs actual grading plans.
The Corps hasnβt responded to questions from the Star about what authority it has to stop work in the Rosemont permit area, in light of Connorβs August 2022 decision.
In Hudbayβs response to the Corpsβ stop work order, company executive Javier Del Rio said it has no plans for work affecting washes covered by the Corps permit until Monday, Feb. 27, at the earliest. Asked last week by the Star if it now intends to start grading and clearing in those areas, Hudbay replied only, βWe are in frequent communication with the Corps.β
A Vermont-based environmental law professor, Patrick Parenteau, told the Star last week that the Corps is on βvery shaky legal groundsβ in ordering Hudbay to stop work at Copper World because of Connorβs August 2022 restoration of the Corpsβ earlier decision waiving authority over the Rosemont site.
βThey flipflopped,β said Parenteau, of Vermont Law School.
He cited an Army Corps βSafe Harborβ guideline thatβs been on the books for 20 years. It says a jurisdictional decision like the one the Corps made for Rosemont in 2021 is valid for a minimum of five years βunless new information warrants revision of the determination before the expiration date.β Connor cited that policy in his August 2022 memo.
That guideline isnβt a formal regulation, Parenteau said. But a 2016 U.S. Supreme Court ruling said that such a determination βis a binding agreement.β
When βthe feds make this kind of representation for private parties, theyβre entitled to rely on it,β the professor said, speaking of an agency decision waiving jurisdiction over a development site.
He said the Corps can go to court to assert it no longer considers a jurisdictional decision valid, or environmentalists could sue to have it overturned.
But βthe cease and desist order means nothing. You need a court order to stop clearing of washes,β Parenteau said. Without it, Hudbay can refuse, he said.
Bui if the Corps were to go to court and win on this case, βthey can tack on penalties on Hudbay to the tune of $55,000 per day for every day they are in violation of a cease and desist order,β Parenteau said.
Hudbay has to be certain it doesnβt have to obey a cease and desist order, he said, adding, βIf they are wrong ... they are going to pay big time.β