The Idaho Aviation Association gives Idaho a general aviation voice, both locally and nationally. Our mission is to:
- represent our members in forums where decisions are made that affect general aviation;
- inform our members about aviation issues;
- work with public and private entities for the preservation, maintenance and enhancement of aviation facilities; and
- promote safety, education and public understanding of general aviation in Idaho.
We invite you to join over 1100 IAA members in this exciting and critical work for the future of aviation in Idaho.
Dan Conner of the Idaho Division of Aeronautics sent this in, saying, “Just wanted to share the great work that the IAA work parties an...Read More >>
Dear Scholarship Committee, Just touching base from snowy Sandpoint to announce that I recently successfully completed my multi-engine commercial trainin...Read More >>
Jerry Terlisner, Vice President of Activities, has announced the work party schedule for 2019. See the full list on our Website CalendarRead More >>
Beaver Pond Leveler
Dan Conner of the Idaho Division of Aeronautics sent this in, saying, “Just wanted to share the great work that the IAA work parties and our Divisions Maintenance crews are doing together. Great work all the way around. Thank you everyone.”
You may be aware that the Magee Airstrip in North Idaho is subject to flooding, due to an adjacent beaver dam. Beavers are generally beneficial, because their dams create ponds that provide habitat for fish and other wildlife, because they control flooding by slowing river flows, and generally save water. However, sometimes a beaver pond is too close to man-made structures. If the level of the beaver pond can be lowered some, everyone can live in peace. That’s where beaver pond levelers come in.
A properly designed and built pond leveler will create a permanent leak through the beaver dam that the beavers cannot stop. They eliminate the need for repeated beaver removal.
In order for these pipe systems to work, they must be designed so that a beaver cannot detect the flow of water into the pipe. The pond leveler works by surrounding the submerged intake of the pipe with a large cylinder of fencing to prevent the beavers from getting close enough to the pipe intake to detect water movement. As a result, the beavers do not try to clog the pipe, and maintenance is rarely needed. Usually a pond depth of at least three feet is required for these beaver dam pipes to function properly.
The height of the pipe in the dam determines the pond level (see diagram). Water will flow through the pipe unless the pond level drops below the peak of the pipe. The pipe is set in the dam at the desired pond level, and can be adjusted up or down if desired.
Pond leveler pipes do not need to be sized like road culverts to handle catastrophic storm events because heavy storm runoff will simply flow over the top of the dam. Following the storm the pipe will return the pond to the normal level. Some mild pond fluctuations are possible following very wet periods, but since the dam height is controlled by the pipe the water remains controlled at a safe level.
When installing a pipe system it is very important to lower a pond only enough to protect human interests. The more a pond is lowered the more likely it is beavers will build a new dam downstream to render the pipe ineffective. Lowering a beaver pond by up to one vertical foot is generally not a problem.
A single round of beaver trapping may be necessary prior to a pipe installation if a beaver dam must be lowered by 2 feet or more. Beaver removal will prevent them from building new problematic dams in response to the lower water. Fortunately though, when new beavers relocate to this area they are likely to tolerate the smaller pond with new dam building because they do not have the memory of the higher water level. Therefore, repeat beaver removal is usually not needed.
So far at Magee, so good!
Scholarship Thank You Letter
Dear Scholarship Committee,
Just touching base from snowy Sandpoint to announce that I recently successfully completed my multi-engine commercial training. It was stressful (light twins will teach you a thing or two I learned) but ultimately lots of fun and I had a great checkride and now I've added 'Commercial Airplane Multi-Engine Land' to the resume!
As obvious as it may sound to you all, this would have been nothing but a dream without your very gracious assistance and I am most appreciative for helping me achieve this milestone. I will never forget how the IAA made this happen.
Thank you all so very much.
ASEL, AMEL, IFR, AGI
ps - Ken Larson and I have a great 'Career Pathways: Aerospace' class at the High School this semester. Lots of prospective career pilots in the making. We're having a ball.