Widespread interest in the plan eventually fizzled. “But we need to know a lot more about it than we currently do.” WHAT’S BEING PROPOSED, AND WHO IS PROPOSING IT?įormal large-scale water importation proposals have existed in the United States since at least the 1960s, when an American company devised the North American Water and Power Alliance to redistribute Alaskan water across the continent using reservoirs and canals. I think it would be foolhardy to dismiss it as not feasible,” said Richard Rood, professor of Climate and Space Sciences and Engineering at the University of Michigan.

Hatching success of eggs in successful nests was not associated with dredging activities.“We can move water, and we’ve proven our desire to do it. Selenium concentrations at the newly created island were higher and cadmium concentrations were lower in 2010 than 2009. Element concentrations in tree swallow livers for the non-island study sites did not show a trend among years in relation to the dredging. Polychlorinated biphenyl and p,p′-dichlorodiphenyldichloroethylene concentrations in tree swallow nestlings decreased at all study sites over the period 2007 to 2010 including the island study site between 20.

Organic and element concentrations were at background levels in all samples.

Organic and inorganic contaminant data were collected from tree swallows in 2007 through 2010 at one study site near the dredging operation, a reference study site upriver from the dredging activity, one study site down river from the dredging activity, and one study site on a newly created island (20 only). Tree swallows (Tachycineta bicolor), whose diet is mainly aquatic invertebrates, were used to evaluate contaminant exposure in both the dredged and newly created habitat. Chemical analysis of sediment in 20 in the area to be dredged indicated detectable concentrations of organic and inorganic contaminants.

N 20, dredge material from the Mississippi River in Pool 8 south of Brownsville, Minnesota was used to construct nearby islands.

Budget to dredge mississippi river