The government will be taking steps to help protect migratory birds. Five
billion birds migrate from North America to the tropics every year. Land
development is threatening the birds’ stopover habitats. Kyle Norris has this
story:
Transcript
The government will be taking steps to help protect migratory birds. Five
billion birds migrate from North America to the tropics every year. Land
development is threatening the birds’ stopover habitats. Kyle Norris has this
story:
The new policy announced by President George Bush will include habitat
improvements for migratory birds. The improvements will happen on national wildlife refuges and in some
urban areas. The US government will collaborate with Mexican officials to
create habitat programs in Mexico.
Greg Butcher is the Director of Bird Conservation for National Audubon
Society. He says birds are an excellent indicator of the environment:
“Birds have many of the very same needs that people have. So they need
clean air, they need clean water. They need good healthy habitats that are
productive. And so when good things happen to birds, good things are happening
for humans at the same time.”
The government will also offer financial incentives to private landowners in
the US. Who either make their property more habitable to migrating birds, or
who agree to not build on their land.
The U.S. Environmental Protection Agency is proposing new rules on how sewage treatment plants clean water after heavy storms. The Great Lakes Radio Consortium’s Shawn Allee reports:
Transcript
The US Environmental Protection Agency is proposing new rules on
how sewage treatment plants clean water after heavy storms. The Great
Lakes Radio Consortium’s Shawn Allee reports:
When rainstorms overwhelm sewage treatment plants, cities sometimes
blend raw sewage with clean water that can contaminate local rivers and
lakes with bacteria. To stop this, the EPA’s proposing a compromise
with local governments. Cities may blend waste when there’s no
alternative, but they must improve their waste treatment systems.
Alexandra Dapolito Dunn represents an alliance of city treatment
facilities. She says local governments need this flexibility.
“There are going to be some communities around the country where, due
to the low income and the distressed nature of an urban population, they
may have a difficult time affording the most cutting edge technologies
available.”
It’s not clear how much money cities will save under the proposed
guidelines. Upgrades can cost millions of dollars, and right now,
treatment centers compete for limited federal assistance.
A proposed national clean water trust fund will be debated in Congress over the next year, with help from a leading House Republican. The Great Lakes Radio Consortium’s Chuck Quirmbach has the story:
Transcript
A proposed national clean water trust fund will be debated in Congress
over the next year, with help from a leading House Republican. The
Great Lakes Radio Consortium’s Chuck Quirmbach has the story:
Sewage treatment agencies and some environmental groups have been
pushing for a dedicated national fund to help control sewer overflows
and protect regional waters like the Great Lakes.
Recently, House Water Resources Sub-Committee Chair John Duncan,
Junior introduced the Clean Water Trust Act. The Tennessee Republican
says the nation’s water infrastructure needs more federal money, but it
isn’t clear where Congress would find the 38 billion dollars over five
years.
Ken Kirk of National Association of Clean Water Agencies says he
doesn’t know yet who would pay.
“But I think if you would poll the American people, I think you would
find at least two things. One, clean water is a high priority, and
two, they are willing to pay more.”
Kirk contends a clean water trust fund would be similar to programs
financing highways and airports.
The Duluth Seaway Port Authority's bulk cargo dock is typical of many in the port. Officials are troubled by corrosion appearing on the docks in the harbor - the steel is corroding much faster than normal. (Photo by Bob Kelleher)
A piece of steel that has been removed from a dock
wall, showing extensive pitting. (Photo by Bob Kelleher)
Engineer and diver Chad Scott (left) discovered the dock corrosion in the late 1990's, and suspects a microbiological connection. Jim Sharrow (right), Duluth Seaway Port Authorities Facilities Manager, is hoping for some fast answers. (Photo by Bob Kelleher)
Corrosion is eating away at the steel walls that hold one of the Great Lakes’ busiest harbors together. The corrosion is unlike anything known to be happening in any other Great Lakes port. But other port officials are being encouraged to take a closer look at their own underwater steel. The Great Lakes Radio Consortium’s Bob Kelleher reports:
Transcript
Corrosion is eating away at the steel walls that hold
one of the Great Lakes’ busy harbors together. The
corrosion is unlike anything known to be happening in
any other Great Lakes port. But other port officials
are being encouraged to take a closer look at their own
underwater steel. The Great Lakes Radio Consortium’s
Bob Kelleher reports:
Some kind of corrosion is eating away at the Duluth
Seaway port’s docks. The docks are those long
earth-filled metal rectangles where ships from around
the world tie up to load and unload. Those docks are
lined with sheets of steel, and the steel is rusting
away. Jim Sharrow is the Duluth
Seaway Port Authorities Facilities Manager.
“It’s corroding quickly – much faster than people expect
in fresh water. And our main concern is that we’ll lose
the integrity and the strength of the dock long before
expected, and have to do steel replacement at $1,500 or
more per lineal foot, much earlier than ever would have
been expected.”
Corrosion should be a slow process in Duluth’s cold
fresh water. But, Sharrow says, there’s evidence it’s
been happening remarkably quickly for about thirty years.
“What we seem to see here is corrosion that started in
the mid 1970s. We have steel that’s 100 years olds
that’s about as similarly corroded to steel that is 25
to 30 years old.”
It’s a big problem. There’s about thirteen miles of
steel walls lining docks in the harbor that serves
Duluth, Minnesota and Superior, Wisconsin. There’s half
again as many feet of wooden docks, held together with
steel pins. There’s corrosion on the legs of highway
bridges and the giant
steel ore docks that ship millions of tons of taconite
– a type of iron shipped to steel mills in Gary,
Indiana and Cleveland, Ohio.
“We characterize this as a 100-million dollar problem in
the harbor. It’s a huge problem, and what is so odd
about this is that we only see it happening in the
navigational area of the Duluth-Superior Harbor.”
The harbor links the St Louis River with Lake Superior.
Go a few miles up the river and there’s little corrosion
. So it doesn’t seem like the problem’s there. But, back
in the harbor, at the current rate of corrosion, Sharrow
says, the steel will fail quickly.
“I figure that in about 10 years at the current rate,
we will have to start replacing steel.”
“Particularly marginal operators could decide rather
than repair their docks it would be better for them to
go out of business, and we’re hoping that that isn’t
the case here.”
While the cause is a mystery, there’s no shortage of
theories. It could have something to do with stray
electrical voltage; water acidity; or the kinds of
steel manufactured in recent years. Chad Scott
discovered the corrosion in the late 1990’s. He’s an
engineer and a diver. Scott suspects
a micro-biological connection. He says there might be
something growing in small round pits that form on the
steel.
“We cleaned up the water. That’s the main thing –
that’s one of the main changes that’s happened since
the 70s, is we’ve cleaned up our water. We’ve cleaned
up our harbor, which is a good thing. But, when we
cleaned things up we also induced more dissolved oxygen
and more sunlight can penetrate the water, which tends
to usually promote more growth – more marine
microbiology growth.”
A team of experts met in Duluth in September to share
ideas. They came from the U.S. Navy, The Army Corp of
Engineers, and Ohio State University. And they agreed
there’s something odd going on – possibly related to
microbes or water chemistry. They also recommend that
other Great Lakes ports take a closer look at their
underwater steel. Scott says they at least helped
narrow the focus.
“We have a large laundry list right now. We want to
narrow that down and try to decide what is the real
cause of this corrosion. And these experts, hopefully,
will be able to get us going on the right direction,
so we can start doing testing that will identify the
problem.”
With the experts recommendations in hand, port
officials are now planning a formal study. If they
do figure out the cause, then they’ve got to figure
out how to prevent it. They’re in a race with
something, and right now they don’t even know with
what.
For the Great Lakes Radio Consortium, I’m Bob Kelleher.
Polluted sediments sit at the bottom of rivers and lakes across the Great Lakes region. They can affect water quality, wildlife and human health. More than 40 highly contaminated areas in the region have been identified by the EPA’s Great Lakes Office. But so far, only about half of those sites have been cleaned up. This summer, dredging is taking place in at least three of those hot spots, all on rivers. The Great Lakes Radio Consortium’s Karen Kelly reports on the challenges of cleaning up a river bottom:
A new proposal announced last month by President Clinton and the
Environmental Protection Agency is being hailed as a new effort to
achieve clean water throughout the country. Officials say the method
will enforce the regulations that are already in place. But some
environmentalists say educating the public should be first and
foremost. The Great Lakes Radio Consortium’s Tom Scheck reports:
