BOARD02497

• Board Meeting Date: 7/14/1971
• Description: Agenda or Table of Contents, Minutes, Memos
• Board Meetings - Doc Type: Meeting

I~O~

some extent by the type of water which will be
released from the dam.

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After the dam is constructed, the water being
released from the dam will be relatively clear
water. It will not be carrying much of a silt
load. The water has a certain carrying capacity
for suspended solids, or silt, or sand, or what-
ever you want to call it. As the clear water is
released from the dam it will start picking up
the load that it can carry according to its
volume and velocity as it goes downstream. So
actually, for a considerable stretch downstream
the water will cause more erosion than the water
that is passing out there today. Clear water,
in effect, creates a greater problem than the
natural water which comes down the South Platte.
This aggravates again the erosion problem. In
order to take care of the situation, the Corps
considered, and we agreed, that it was necessary
to control the South Platte River within some
defined channel to prevent constant erosion and
what would otherwise also be a flooding problem.

This depicts the channel from just upstream
here. This is the dam at the upper end. Then
state responsibility starts just at the bridge.
The brioge that goes across the river upstream -
the old road that went up to the Martin plant.
This map actually only portrays about 50 percent
of the entire area. We have stopped here on
Bowles Avenue because the map got too unwieldly.
The map ends, this part of it that we have shown,
ends at Bowles Avenue that you crossed this
morning coming across the Platte. We are located
here at the Columbine Country Club, right here
in this area (pointing on the map).

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The blue indicates the course of the actual
river channel as it was about three years ago.
It has shifted some since. In some places it
is now outside bfthe area that we have shown -
despite the fact that we have had no floods, just
the natural erosion.