Mississippi River among most polluted in the nation.
Cold snap in the forecast ought to attract more feathered visitors.
One of several major bridge projects moving forward in next year.
Reservations being taken now for tours that begin Feb. 24.
Claim horses are source for e-coli contamination in river system.
Contractors group claims minorities under-represented on massive project.
Standstill in both directions at St. Louis.
Corps could face sharp criticism from those unhappy with management strategy in 2011.
Corps of Engineers would be required to drain upstream reservoirs to handle spring rains.
Expansion would include 200-room hotel, new parking; completion expected in late 2013.