Because the beaver isn't just an animal; it's an ecosystem!

Tag: Beaver Flooding


You’re going to love this story.

Beavers to blame for big dam boondoggle

If you ask the neighbors on Southwest Merestone Court in Tigard, there’s nothing more important than the large wetland and pond that stretches for acres behind their homes.  For more than 20 years, it has been the ideal habitat for fish, turtles, foxes, deer, otters and osprey. Neighbors quickly point out a pair of nesting bald eagles in a nearby evergreen.

 But the most famous residents of Merestone Pond are the family of beavers whose dams helped transform the section of Summer Creek years ago.  The beavers have a longstanding feud with city workers, who say the places the beavers build their dams are threatening two culverts under Southwest 121st Avenue.

 Crews have removed the dams twice in the past 15 years, and removed a portion of a third dam last Wednesday, re-sparking a contentious fight between neighbors and city officials.  The neighbors are fiercely protective of the beavers. When work crews removed a dam from the pond in 2011 — which city workers said was clogging the culverts — neighbors called the police.

You know, a million years ago I wrote a certain famous beaver expert that works for the federal government about our upcoming beaver battle  and he said, gosh, of course I’ll help. “I love a good beaver row!”

Years later we  know exactly how he felt.

This story warms the very cockles of my heart. From the protective neighbors calling the police, to the valiant beavers rebuilding their pond anyway and the lurking city workers getting admonished by ODFW.

Beavers may be trouble

 Crews installed two vertical logs upstream of the culvert in 2011 in the hopes of attracting the rodents to rebuild a safe distance away, but the beavers have shown little interest in building where the city would prefer.

 “These beavers in particular are being really tricky,” Ruther said.

 Urban beavers can be troublesome for cities, but they are also an important part of the ecosystem, Liz Ruther, ODFW said.  “Those beavers are doing fabulous habitat work out there,” Ruther said. “The area looks beautiful. Hopefully, they will continue moving around. We really want them to use the attractants.”

 Goodrich said that as long as the beavers don’t threaten the city’s infrastructure, the city has no plans on removing the dam any further.  “We look at Tigard as a partner for urban beavers,” Ruther said. “They are a big deal for water quality and fish.

Wait a minute. You’re just outside Portland, and you’ve paid for crews to come rip out the dam multiple times and never installed a flow device? Honestly? That’s like a novice at the Vatican not realizing there was wine in the sacristy. Surely you know there are better ways to protect the culvert, maintain the pond, and still keep the neighbors happy, right?

 Plans are in the works to install a pipe under the dam, which would allow some water to continue to flow and not disrupt the beavers, Goodrich said.

I can only hope you mean OVER and not UNDER the dam.  The Clemson design is 30+ years old now.  A flexible lever will cost a fraction as much for parts and labor and work better. Tigard can do this. Well, I wrote John and Liz and offered what help I could.

Flexible-Leveler-Diagram1

You can lead Tigard to water, but you can’t make them think.


First we should give MORE kudos to our beaver friends at Fur-bearer Defenders who have strewn a path of beaver deception around the municipality of Mission in British Columbia just outside of Vancouver, installing 9 beaver deceivers to control flooding in culverts.

Beaver deceiver prevents dams from being built

A beaver deceiver being installed in Mission. Each unit saves the municipality thousands of dollars annually. Submitted phot

Gosh, I’m so old I can remember when Adrian Nelson had just gotten married and nervously installed his very first one after chatting a lot to Mike Callahan and scouring his DVD. And now these installs are practically a piece of cake! Delicious, effective cake that they actually talk an entire city into paying for!

The non-profit group approached the district with a simple, non-lethal alternative for managing flooding concerns associated with beaver activity: build a wire fence around the culvert intake, interrupting the beavers’ natural instinct to build where there’s current and the sound of flowing water.  “They work awesome,” said Dale Vinnish, public works operations supervisor. “We don’t have to trap beavers. They moved elsewhere. They’re not causing a problem.”

The nine “beaver deceivers,” at $400-$600 apiece and built in one day, save the district thousands of dollars, because workers no longer have to pull apart dams.  Previously, the municipality would break down two to three dams daily, several days a week, in addition to paying for the capturing and killing of about a dozen beavers annually.

“If we weren’t trapping, we were going in continuously to break apart the dams,” said Vinnish.

Great work Fur-bearer Defenders! We are entirely impressed that you are easily giving Washington State a run for it’s money as the beaver-management champion of the northern hemisphere. Go Mission!

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New footage from our famous San Jose beaver friends. Love the ‘urban safari’ feel of this video. Sadly if this is momma beaver, I’m not seeing any teats, and that means no silicon valley kits this year!



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Next, a nice column on ‘Extinction Events’ from Minnesota.  His point is climate change, but my point (as always) is beavers!

For instance the pond created behind a beaver dam becomes the habitat for a wide variety of plant and animal species. Remove the beaver engineers and the entire ecosystem collapses.

It’s about time we start to realize the number of species that are displaced or wiped out when beavers are removed. Trickle-down economies work both ways. I wasn’t happy with this later sentence “Without the stream, there could be no beaver dam” because that’s not exactly true. I’ve heard of beaver creating ponds from tiny springs, so that the big beautiful pond becomes the only water in a desert. Certain ephemeral streams (like we have here in California that dry up in the summer) wouldn’t dry up if we had enough beavers. I kindly sent him this Chumash legend:

Author Jan Timbrook who is a curator for the Santa Barbara museum of natural history described this in her book ‘Chumash Ethnobotany” has some very interesting things to say about beavers:

“A willow stick that had been cut by a beaver was thought to have the power to bring water. The Chumash would treat the stick with ‘ayip ( a ritually powerful sbustance made from alum) and then plant it in the ground to create a permanent spring of water.”

Jan Timbrook, Chumash Ethobotany p. 180

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And on to the ugly. I’ve been sitting with this story a couple of days, but its fairly unavoidable and we better deal with it. This is the kind of negative advertising I hate, even more than I hate the Belarus story. Ultimately Americans value roads much more even than we value human life. Now every city will be more tempted to tell property owners they’re liable for beaver dams. Call me crazy, but it seems like if you’re worried about the stability of a dam, the smart thing to do is to reinforce it!

Flooding damages road in West Warren MA


But I have that within which passeth show;
These but the trappings and the suits of woe.
Hamlet: Act I Scene ii

Before the beavers came to Martinez I didn’t much think about trapping or trappers. I never chained myself to a fur store or threw paint on a stole in protest. I probably thought more about the mistreatment of lab rats and rhesus monkeys (and some particularly unlucky Scotty dogs) in grad school, but I never really paid that much attention to the issue.

Of course that changed post-beaver. For years now I have reviewed articles that are both wistful and admiring about the “lowly” trapper. There seems to be an allure of the lost mountain men and a sense that killing beavers or foxes is as much apart of America’s heritage as a re-enactment of a particular battle in the Civil War, which may be true.  There are trappers who become beaver experts and start advocating for them, like Grey Owl and Connecticut’s Skip Hilliker, and trappers who just  think they’re beaver experts and spend their time spreading lies about them, like the charmer in MA, or the one in PA who said he was only killing the ‘soldier beavers‘.

I try not to react from an emotional place, and to stay focused on the fact that trappers are real people who need to earn a living and  ultimately they may become the people who install the flow devices as public opinion shifts.   Still, every now and then a trapping image or pronouncement is so stunningly  horrific to me it catches me totally off guard. Yesterday, for example, a trapper that gets no link contacted me and said he’d invented a new form of live trap and was I interested. His youtube channel showed a battlefield of beavers, and I thought really? I suggested he talk to Sherri Tippie and he wrote back that he had but that she was very unreasonable. This morning she wrote an animated response describing his trapping devotions and putting voice to my private misgivings.

Sometimes seeing these grisly images can be like a black and white photo from the holocaust, which I even hesitate to type because it implies that I think the actions are morally equivalent or their impact is the same – which I don’t. But it can be throat-closingly, indescribably, shocking – especially when I don’t expect it. Somehow I think the very existence of that shock is offensive to some people, so that they deliberately mock it or provoke it like a young boy on the playground chasing his screaming classmate with the a dead lizard. Remember Josh’s aunt? And her remark that PETA members made excellent coats?

For the record, I don’t think we should set fires to fur warehouses or butcher stores and I also don’t think we should rely reflexively on killing to solve problems.  I’ve noted before that the way we treat animals has become a kind of “false populism” where we identify which ‘tribe’ we belong to by whether or not we kill the intruder or discourage it. But this kind of tribal identification is essentially false -because we personally know there are all kinds of hunters with compassion and plenty of PETA-types without it. People are more complicated than tribes and our attitudes towards wildlife are a reflection of that complication and evolving all the time based on whether we believe we have realistic options or not.

So this week’s AP article on the pros and cons of trapping is valiant nondiscussion of the issues: you know the type – some say the earth is round, some flat, what do you think? It describes what some trappers say and describes what some members of the animal saving group Born Free says and never discusses once the issue of wildlife management in a realistic way or whether we have other tools than extermination in our arsenal. It prompted some fiery push back from the trappers in PA which prompted one of my favorite outdoor writers to reiterate his support for trapping, which prompted me to write him in frustration saying  something about everything looking like nails to men with only hammers…

Which brings us to the review in Fur Taker Magazine Sept 2011, (and no, I’m not kidding). It’s actually a positive recommendation of Mike Callahan’s Beaver solutions DVD by trapper Stephen Vantassel, which only makes sense only if we admit we’re living in a post-tribal world.

I have been a long fan of beaver pipes or beaver flow devices ever since I became convinced of their effectiveness in the late 1990s. Unfortunately a lot of people within the wildlife damage management community, including fur trappers, see these devices as threats to their way of life. I would argue that there is no necessary reason to think this way. I suggest it is better to view the pipes as just another tool in the toolbox for doing wildlife management.

Good for you, Stephen. He of course goes on to mention crazy animal rights people just so readers know he’s STILL ONE OF THE TRIBE but its hard work crossing the aisle these days so I thank you for it. In the meantime, take a lesson from the world of beavers and talk reasonably to someone who’s not in your tribe today.

LOCAL UPDATE:

Remember  the big storm back in March that wiped out the lodge and blew away the filter on Skip’s flow device? Well Moses brought it back and its been sitting in the corp yard. We’ve been watching to see when the pipe would be plugged (the filter stops the beavers from feeling the suction and plugging the pipe) and I figured since it didn’t happen all summer with  it would probably happen after the first rain. Which it did. I took this photo yesterday morning with no movement coming out of the pipe. So it has to be fixed because the dam will rise and is rising. Dave Scola says that city staff will be replacing the filter themselves any day now. So let me know if you see anything.The good news is that its winter so whatever happens the beavers will get the water back.



At long last Mike Callahan’s instructional DVD is available to make the techniques and tools of beaver management accessible to every property owner and township. Having reviewed my own copy last Wednesday I can testify that the instruction is offered in pragmatic, easy-to-understand language, and will contribute substantially to the welfare of beavers and landowners for decades to come. A second clip of testimonials is viewable on his updated website, and purchasing information can be found by clicking here. Attentive beaver watchers will soon recognize our very own Martinez beavers featured in section two, which couldn’t please this particular supporter more!

There are lots of parts of beaver advocacy that are frustrating, disappointing and tiring. This isn’t one of them. I am eager to see this DVD in every public library across the country. I am impatient to see every city manager forced to watch it at breakfast twice a year, and hopeful that it will become regular fare at Fish & Game or the Department of Transportation soon. Do your part to help spread the word that any city smarter than a beaver can manage a beaver and let’s make doing the right thing harder and harder to avoid.

Thanks Mike! And congratulations!

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