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December 02, 2008

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There's more on this story, including links to Riverkeeper's April congressional testimony at NyackNewsAndViews.com http://www.nyacknewsandviews.com/2008/12/rvrkprsupremes.

H. Springer

Let us clear up some facts intentionally clouded, by those wishing to maximize the impact of a basically flawed argument.

First off, let us take a hydroelectric dam, blocking its river from shore-to-shore, leaving as the only possible route downstream, the path directly through its turbines. If that river has fish in it, they will be impacted, and any attempts to divert them can never be 100% effective. Fish will be injured.

Let us now consider an open, un-dammed river, with a power plant on one shore, taking cooling water in through an intake grate of perhaps 8 feet high, and 15 feet wide, in a small man-made bay on one shore.It is readily seen that the vast preponderance of river water passes by unaffected, and does not enter the grate. In fact, a mere 30 to 50 feet out in the stream, no suction can be felt towards the grate, and its effect is strictly local, being limited to perhaps a 100 foot half-circle centered on the grate. Beyond the half-circle, river water flows past the intake too strongly to be diverted, and misses the intake entirely.

Examining the habits of fish, one would have to find a species which aggressively seeks out the shoreline, in order for that species to come near enough to the shorebound intake grate to be impacted. Moreover only a small percentage of even the most shore-seeking species will seek out that particular expanse of shore , as opposed to the remaining 315+ miles of West shore, and 315+ miles of East shore. Assuming every fish crossing into the the 100 foot half circle gets sucked in, still, that means only one thousandth of one percent of all fish on the river are affected.

But.... many fish do not seek the shoreline. Many fish, including the anadromous shad, keep to the midriver deeps when both swimming upsteam to spawn, foraging as fry, and migrating back to sea. This means that one thousandth of one percent is a wildly inflated upper boundary, for what percent of these species ever encounter the intake ports of a shore-bound power plant. Uninvolved civilian residents in the immediate vicinity of Indian Point report that they never see dead fish corpses floating in the Hudson, or washed up on the shore. Workers at the plant claim that fish are harmlessly diverted by an intentionally installed fish-diversion weir.

As far as fish eggs, Hudson river fish drop their eggs in historic pebble beds far north of Indian Point, so that they hatch long before coming south enough to be near Indian Point. It takes 126 days, according to the Lamont Doherty Laboratory, for Hudson river water to clear the estuary. If shad drop eggs near Troy, and they hatch within 10 days,...this means they hatch a mere 10 divided by 126, or 7.9% of the way downriver, in the vicinity of Castleton N.Y..Once hatched, the lively fry seek out the midriver deeps, to feed on plankton, and thus never come anywhere near Indian Point.

The fresh water/salt water division line lies north of West Point, so that ALL of the species spawning in fresh water do so far from Indian Point. The brackish (slightly salty) water peculiar to the Peekskill region does not support the spawning of saltwater species either, who prefer salt marshes such as exist far downriver. In fact, the brackish middle reaches of the Hudson near Indian Point are naturally scrubbed of aquatic life, by the constant changes in salinity, thus relieving Indian Point of the problem.

These particularities tend to untrack the vague Riverkeeper accusation that "billions of fish" are "slaughtered" by Indian Point.

Had Riverkeeper, or their new friends at the NYS DEC displayed some actual data to back up the accusation, then DEC's blanket statement could be viewed as a statement of need. Without any onsite investigation, DEC's statement must be viewed as a mere statement of their own intent. They intend to manage Indian Point, so, without any research, they simply declare that "billions of fish" are killed.

Why do this??.....DEC can be viewed in public arenas as proactive, and Riverkeeper can be viewed by its public as worthy of cash contributions, neither of which has any protective value for any Hudson river fish, or the river, or the local inhabitants.

This specious argument is being fielded because of agency needs of both Riverkeeper and NYS DEC. Riverkeeper needs a campaign issue, to continue to seem relevant. Simultaneously, personnel at NYS DEC wish to pass through the whitewater shoals of Albany's gubernatorial changes with their jobs intact, and so have crafted a pseudo-document, declaring dead fish to exist.

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HUDSON RIVER MILES

  • HUDSON RIVER MILES
    The Hudson is measured north from Hudson River Mile 0 at the Battery at the southern tip of Manhattan. The George Washington Bridge is at HRM 12, the Tappan Zee 28, Bear Mountain 47, Beacon-Newburgh 62, Mid-Hudson 75, Kingston-Rhinecliff 95, Rip Van Winkle 114, and the Federal Dam at Troy, the head of tidewater, at 153. Entries from points east and west in the watershed reference the corresponding river mile on the mainstem.

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