Dangerous dams creating a lot of concern

For the better part of a century, submerged dams were the workhorses of the American heartland, harnessing the power of rivers to run grain mills, generate electricity and keep lakes and ponds full of water as a hedge against drought.

The walls of concrete, called low-head dams for their minimal profile, outlasted their original purpose long ago. Today, they are better known for creating the type of wide, smooth waterway that invites city planners to turn an urban river into rustic recreational space.

But beneath the seemingly gentle cascades and quiet rumble, the dams hide a sinister secret: They have dragged hundreds of unsuspecting swimmers and boaters into their churning waters and drowned them, sometimes within sight of busy sidewalks and cafes.

It’s less of a secret in the Miami Valley where some of the dams have been, or are being, replaced.

In Springfield, low dams were altered on Buck Creek to create a fast water recreational area for paddlers at C.J. Brown Resevoir.

In Dayton, the dangerous Monument Avenue low dam will be partly demolished and reconstructed starting in July using limestone boulders to create a safer recreational feature in the Great Miami River for kayaks and canoes. The $4 million project, paid for mostly with private funds, will eliminate a hazard that has caused drownings and near drownings over the years.

The project should take about a year to complete. The James M. Cox Foundation, the charitable arm of Cox Enterprises Inc., owner of this newspaper, is providing $1 million.

Many more low dams — likely in the hundreds — can be found on Ohio rivers. The state has no easily obtainable count. There are an estimated 40 or so low dams on Miami Valley waterways in Butler, Darke, Greene, Miami, Montgomery, Preble and Warren counties.

In 2006, Craig and Patricia Wenner drowned at the Englewood low dam. Craig, 50, a manager with Five Rivers MetroParks, died trying to save his wife, also 50, after she entered the Stillwater River to rescue their Labrador retriever puppy.

In an ironic twist, Craig, an expert in construction projects, was to be the MetroParks manager of a $1.2 million project that ultimately removed the low dam, which was close to the much larger flood control dam.

“The builders of these dams have created a very elegant trap for human beings,” said Nate Hoogeveen, who heads river programs for the Iowa Department of Natural Resources. “Once people go over the dam, it’s impossible to climb out.”

Now a spike in deaths is inciting a debate about whether the dams should be ripped out, even if it means letting scenic riverbanks turn to mud.

Since the 1950s, at least 441 people have died at 235 low-head dams in 38 states, according to researchers at Brigham Young University. More than one-third of the deaths have occurred in Iowa, Minnesota and Pennsylvania.

Other top states for low-head dam deaths include Illinois, California, Maryland, Ohio, Texas and Virginia.

About half of those deaths occurred in the past 15 years — a period when many cities have sought to repurpose their rivers into picturesque attractions that would draw tourists and shoppers to business districts. Many rivers once used mostly by fishermen are now teeming with kayakers and rowing teams and used as the site for summer festivals.

The dams, typically built in the early 1900s, can look harmless, especially from upriver. An approaching boater or swimmer often sees nothing more menacing than a gentle drop, perhaps as little as 4 or 5 feet.

But once they fall into the roiling water below, people find themselves pounded by a never-ending wave of water that forces them to the bottom. If they can bob to the surface, the recirculating current carries them back to the face of the dam and the nightmare begins again.

Experts say the number of dead is undoubtedly higher than the confirmed cases. No government agency tracks the deaths, and it’s unclear how many low-head dams even exist. Estimates range from 3,000 to 5,000.

On the Des Moines River, two low-head dams stand at either end of a half-mile stretch of the channel that runs through downtown Des Moines. At least 15 people have died at the Center Street Dam and the Scott Street Dam.

Luther Aadland, a Minnesota river ecologist and leader in efforts to remove the dams, recalls witnessing a dog caught in the rush of water below a dam.

“It was very disturbing,” he said. “I thought about jumping in to help, even though I knew it would have been certain death for me.”

It’s unclear what’s behind the increased deaths in recent years, but Bruce Tschantz, a Knoxville, Tenn., hydraulic engineer who has become an expert on the dams, believes it’s a combination of people spending more time on rivers and not understanding the power of the churning water.

Making matters worse is the fact that many dams are poorly marked and lack lines or buoys for imperiled boaters or swimmers to grasp.

Many states will help finance the removal of dams, but even ripping one out can cost $1 million or more. Community leaders also face the concerns of residents who fear that, without a dam, their riverfront homes will overlook nothing more than a muddy creek.

Kevin Burns, mayor of Geneva, Ill., calls low-head dams the “third rail of a lot of river communities.”

A half-dozen people have died in the past decade at Geneva’s low-head dam on the Fox River, including a kayaker last spring. But residents have resisted removing it, noting the structure, which helps provide a postcard-pretty backdrop for Geneva’s downtown, is clearly marked.

In South Whitehall Township, Pa., officials rejected a proposal to remove a dam even though the state probably would have funded the demolition.

“People like the aesthetic, the noise,” said board President Christina Morgan.

Iowa helps subsidize the removal of four or five dams a year. But Des Moines officials are still wary of the expense and of possibly discouraging recreational use of rivers by lowering the water level.

“It’s like they’re waiting for a bunch of deaths before they do anything,” said Julie Kunkle, who has pushed unsuccessfully for city action since her brother Steve Nourse died while trying to kayak through the Scott Street Dam in 2002.

Staff reporter Steve Bennish contributed to this report.

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