Protected aquifer feared at risk

Pooling underneath the Twin Cities area is drinking water so old and pristine that it's protected by state law.

It can't be used for industrial purposes in the seven-county metro area.

But the rules that protect the 900-foot-deep Mount Simon-Hinckley aquifer in the metro don't apply to Chisago County, where LS Power wants to build a $300 million to $500 million power plant.

The New Jersey-based company's proposal to use groundwater from the aquifer has intensified opposition to the plant and has raised interest in changing the law to put the water off-limits.

"It is certainly a last-resort aquifer," said Chris Elvrum, manager of water supply planning for the Metropolitan Council. "It is used by some municipalities when there's no readily available other source, and only for potable use."

Elvrum said age-dated samples show that the water ranges from 1,000 to 35,000 years old. Depending on where it is withdrawn, it can take hundreds of years to recharge.

Since the 1989 law forbidding its use for industrial purposes in the metro area, that region has expanded: the U.S. Census Bureau now defines the metropolitan statistical area as 13 counties, including Chisago and several others not part of the original seven-county list.

A change in plans

LS Power knew of Mount Simon's importance, said D. Blake Wheatley, lead project developer for the company. But he said it proposed last summer to use the deeper water anyway, for fear of competing with any city and private wells that draw water from shallower aquifers. The proposal called for the plant to use water from one or two nearby sewage treatment plants and, if necessary, to supplement that with as much as 2 million gallons of groundwater per day, including some from Mount Simon.

However, the company recently abruptly changed direction; Wheatley said it will not use any groundwater.

"We're going to make do with the water that we have" from the North Branch and Chisago Lakes joint sewage treatment plants, he said.

The company also abandoned plans to discharge 1 million gallons of water a day from the plant into a tributary of the Sunrise River, said Wheatley, and will develop a "zero-discharge liquid system."

The decision stems from a change in the design of the natural-gas-fired plant, he said, not from citizen concerns.

Plant meeting draws 500

About 500 people attended a meeting last week to debate the proposal. Some said they supported the plant because it would generate tax revenue and construction jobs.

Others expressed doubts about the company's change of mind on groundwater use.

Rob Kravitz lives about 2 miles from the site and opposes the plant, period.

"They've made concessions, at least on paper, regarding the water use issues," he said. "My fear is that, after it's built, they they'll apply for groundwater permits anyway."

Kravitz and others are also concerned that the 780-megawatt plant would require more high-voltage power lines in the area. The company denies that.

The proposed 40-acre site is less than a mile from a large electrical substation and within 5 miles of two interstate natural gas pipelines.

Friends of the Sunrise River, a citizens' group opposed to the project, contends that it will lower property values, increase noise and traffic and conflict with the rural character of the county.

"If the truth were known, it would have more negatives than positives," said Larry Baker, chairman of the group.

LS Power is only at the beginning of the project, Wheatley said, and hasn't submitted a formal plan to regulators.

It is seeking a development agreement with the township board and Chisago County commissioners that pertains mainly to property tax exemptions that require local approval. Those decisions likely will be made in December, after which the company would begin pursuing required permits and approvals from state agencies.

Whatever happens next with the project, Rep. Jeremy Kalin, DFL-Lindstrom, said that he is determined to close the loophole that allows the Mount Simon aquifer to be tapped for multiple uses. Kalin said that he and Sen. Rick Olseen, DFL-Harris, who also represents the area, will introduce a bill next year to extend protection of the aquifer beyond the seven-county metro area.

"It takes dozens or hundreds of years for that water to filter down and to be pure and drinkable," Kalin said. "We're not going to just use it for cooling a power plant."

Tom Meersman • 612-673-7388