March 13 South Platte Minutes

• Basin Roundtable: South Platte
• Title: Minutes
• Date: 3/13/2007
• Basin Roundtables - Doc Type: Minutes

Ross Bethel indicates studies.

Ross Bethel: Refinement areas of2, 3, 4 (see page 3): Grouped together
because there is a common tool that can be used:
-- The decision is to do a modeling effort of the South Platte; these models
are several years off; not trying to replicate those; trying to come up with
simplistic model of historic uses of water on South Platte: StateModel
Program (State Water Allocation Model); data banks ready; looking for
inflows and outflows of South Platte River downstream of Spinney; this
would also have water rights tied into this model; similar to a Point Flow
Model that adds legal water rights.

Harold Evans: You talk about modeling the Main Stem; but the bulk of
our population is on the tributaries, not the Main Stem; so how do you
address the populations like Boulder, Greeley... we do not get our water
from main stem. So you will not be modeling a large part: Poudre Basin,
etc; everything off of Divide;

Ross Bethel: Right, keeping it to main stem;

Harold Evans: so you will not be addressing the needs of a large part of
the population or membership constituency of this roundtable?

Mike Shimmin: How will you handle well depletions and recent recharge
if you are only looking at the main stem?

Ross Bethel: this would be imposed on scenarios for future
Study period from 1950 up to 2005.

Harold Evans: Ground water modeling primarily Denver Basin
Per Item 11 (Update Model Demands to Future (2050 levels):
--lots of ag transfers going on in tributaries as well; don't ignore this

Ross Bethel: Once model is built, nos 13-16 (Page 4-5) re: unappropriated
water question will be able to look at Model Application for
Administrative Change and Re-administration of the reservoir systems;

Harold Evans: Joe Frank, please elaborate on this:

Joe Frank: A more strict administration in place; ie. Augmentation plans
in place that were not there before; calls will be different.

Bmce Gerk: Closely monitored river now; very diligent effort to capitalize
on the water that is in the river; thus, you have a large change in how we
are using the water; thus, there will not be water escaping inadvertently at
any significant level; thus the ability to capture large flows in the absence

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