Big River - September 1999

Page 1

September 1999

The monthly newsletter for people who live, work or play on the Upper Mississippi River

Vol. 7, No. 9

$2.75

Ora-wing Do-wn the Pool Save Taxes & the River

By Amy Mako

B

uilding the locks and dams in the 1930s to create a ninefoot-deep channel for shipping dramatically altered the dynamics of the Mississippi River. The newly formed pools (portions of the river between two successive lock and dams) began to slowly lose their identities as part of a large river ecosystem and to act more like lake ecosystems. Pool 8 of the Mississippi River (above Lock and Dam 8, at Genoa, Wis., and below Lock and Dam 7, at Dresbach, Minn.) displays characteristics of this "riverto-lake" phenomenon. In response, area biologists devised a plan to drop the water level in Pool 8 by 18 inches next summer. This "drawdown" will allow a few thousand acres Common arrowhead (from of shallow wa- of Ponds and Streams) ter habitat to dry up, thereby promoting plant growth. By stimulating the regrowth of native plants, biologists hope to restore a healthier river

ecosystem in much ¡of Pool 8. In early 1996, the River Resources Forum formed a committee to examine this problem and find a feasible solution. The committee, known formally as the Water Level Management Task Force, is headed by Gretchen Benjamin, Mississippi River planner for the Wisconsin Department of Natural Resources (DNR). The mailing list to those involved has grown beyond the original Task Force to more than 900 names, according to Benjamin. With the support of many organizations including the Wisconsin, Minnesota, and Iowa DNR .; and Departments of 1 Transportation, U.S. j Fish and Wildlife Service (USFWS), the ~ Army Corps of Engi~ neers, the shipping inJi dustry, and several enj vironmental groups, \a; the Task Force gradually shaped the solution into a drawdown. "Lake-like characterField Book istics develop when the water in a pool above a dam loses current and the islands within that pool become saturated with water, making them more subject to erosion. The sediment from

l

(Drawdown continues on page 2)

By Reggie McLeod

W

e have learned a lot about rivers and ecology since the lock-and-dam system was built in the 1930s. Now, according to the river shipping industry, the lock-and-dam system is nearly worn out and badly in need of repair and expansion. This presents us with an opportunity to help the river, save taxpayers a burdensome subsidy, and make river shipping more efficient and less damaging to the environment. Earlier this century we redesigned the Upper Mississippi River to accommodate towboats and barges designed for the Lower Mississippi. What worked for the barges, however, messed up the river, its backwaters and wildlife. Taxpayers spent billions of dollars cre(Save the River continues on page 4)

What's Inside River Map Fall Festivals ............... 5 Current Events Photo Contest, Toll Bridge, Arsenal Island Security ...... 6 River Calendar & Almanac River Bike Tour, Hawk Watch, Vegetation Symposium ...... 8


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