WMOD00189

• Contract/Permit #: #98-4
• Applicant: North American Weather
• Project Name: Willow Creek Basin
• Date: 11/1/1997
• Weather Modification - Doc Type: Application

SEP-29-97 HON 03:38 PM TRC NORTH AMERICAN WX

FAX NO. 801 972 3813

P. 11

Question 10:

Question 12:

Question 13:

f:\dag\pc;rwit...pd

if silver leveL~ have increased. Raseline levels of silver will be
established during the winter of 1997-1998. The monitoring/study
period will extend from the winter of 1998-1999 through the winter of
2001-2002. After the monitoring/study period the applicant will meet
with staff at Rocky Mountain National Park to review the results of the
tests made during the monitoring/study period. If silver leveL~ in the
snowpack have significantly increased to a point they are considered
detrimental to flora or fauna, the program will be suspended. If silver
levels have not increased, the program will continue through the permit
period.

The applicant will, in addition, suspend operations when the Director
of the Colorado Water Conservation Board requests that seeding
should be suspended.

To our knowledge, there are currently no other weather modification
projects nearby that would be adversely affected by the proposed
program. The nearest program we are aware of is in the Vail sId area
some 35 miles removed from the proposed target area.

No significant ecological impacts are anticipated from the proposed
program. Significant changes in the precipitation patterns are not
expected (changes are expected to be in the 10-15 percent range).
Studies have indicated that the high elevation snowpack depletion
would only be delayed by a few days by such an increase in snowfall
(Harper, 1981).

No significant increase in erosion due to the increased runoff is
anticipated. The increase in runoff will occur over an extended period
covering the duration of the snowmelt period (usually several months
in duration).

A certificate of liability insurance held by NAWC with $2,000,000 of
coverage is enclosed.

5