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

Month: March 2009


Oh you pesky “worth a dam” tree and beaver-huggers. You don’t understand that planting trees in our creek can slow the water down and cause significant flooding problems. Sure roots hold the soil, but trees get in the way, so you can’t plant any near the water, or near the channel. There are important safety issues at stake here, and these larger concerns matter more than your silly beavers.

HYDRAULIC CHARACTERISTICS OF CALIFORNIA NATIVE RIPARIAN PLANT SPECIES (SANDBAR WILLOWS) UNDER FLOOD CONDITIONS IN A FLUME1

• “The willows decreased velocity at the bottom and increased it at the top of the flow profile.”

• “The willows decreased bottom erosion.”

Please look closely at the following graph from L.K Kavvas at UC Davis. The left axis indicates erosion, and you can see that the bare creek produced much much higher erosion, which means more landloss and greater silt in the water. The right axis indicates velocity, or the speed at which the water moved through the flume. The willow creek not only had less erosion, it had demonstrably faster water, and moved more water through at a quicker rate, leaving less water backed up to hang around and cause flooding.

Too bad the city moved all those trees last year.

1Riparian Habitat Joint Venture: Dec 2007 Section 2 Page 40

M.L. KAVVAS, Z.Q. CHEN,
H. BANDEH, M. CAYAR, N. OHARA,
D. COCHERELL, JOSEPH CECH, JR.
UNIVERSITY OF CALIFORNIA, DAVIS
STEPHAN LORENZATO, TED FRINK
DEPARTMENT OF WATER RESOURCES
JOHN CARLON AND TOM GRIGGS


The remarkable beaver-guardians of Worth A Dam gathered last night to finesse plans for Earth day and our tree planting project. Our intrepid potential eagle scout was there boldly getting ready to go before the council to offer our tree-installation plans. It was a lively meeting, but one of my favorite parts was our brainstorming session about the art project we might offer at earthday.

Artist and teacher Frogard Butler has been helping us with these activities since she generously volunteered to paint a portrait of one of my beaver photographs and gave it to me in support. We decided that since clay was such a huge hit at the beaver festival, we would try it again, inviting children to help us build a diorama representation of the beaver habitat in miniature. Jon volunteered to make the landscape/box that could get us started, and of course we’ll be putting dams and lodges and tiny peices of sheetpile.

I can’t wait.

Beaver people are good people. We signed our 2009 executive agreement, with two additions who will become official worth a dam-ers. Lory will record donations, and Linda will track down research questions. Hard to believe only a year has passed since Worth A Dam was formed. In that time we’ve given presentations to the Elementary and High schools, Audubon, Sierra Club,and all of downtown Martinez. We’ve held a festival, applied for a grant, and expanded our web page. We even found time to work over 20 farmer’s markets and take the city to court. During our first year we raised more than 7,000 in donations.

Not bad for 365 days work.

Maybe all this talk of our accomplishments has inspired you to offer your own. We’re looking for a new tee shirt design for 2009 and would love to encourage you to fiddle with the concept. We want our name and web site address on it, but other than this we are open to suggestions. Why not try your hand at graphic beaver design and give us a couple ideas. If we love your design will make it into 100 shirts this year, and we’ll give you yours for free!


When the lights went out last night, we trekked down to the dam for some some truly fine beaver watching. It started with the unmistakable appearance of mom, who came and sat near us to give the necessary view of her tail. Then all three kits and later the lumbering figure of dad, coming down the creek with a huge branch and pulling it out onto the dam so we could verify that he was indeed an adult, with an unblemished tail.

It was very cheering.

Photo: Cheryl Reynolds

Another couple saw the light and came down to join us. We didn’t recognize them but they had been to both beaver meetings and knew the story. The man recalled that they had used to see a beaver colony regularly in Plumas County, to which I remarked this was where these beavers were supposed to be relocated. Turns out the woman had been the one to mention our potentially homeless beavers to Beverly Ogle of the Mountain Maidu tribe of Greenville Rancheria. Trappers and US Forestry took all their beavers, and they would have been grateful for ours.

Well, I’m grateful for ours too, but its nice to know how that link got established. I had always wondered how plumas county knew about them, and thought maybe city staff shopped around, but what are the odds of them handling anything so delicately? I just scanned through the Novemeber 7th video to find them, but could not. What I did see that I never did before is that Don Bernier, the documentary guy who got interested in our beavers, was there that night adjusting the microphone. I knew he he’d attended, but didn’t know he was recording it. Good. Honestly that meeting was so inspiring, it really needs to be on the big screen someday.

Four more interested watchers were drawn by the light and came to appreciate beavers in grand display. One man thought they had left becuase “he hadn’t heard anything about them on the news in a while”.  (!) They all had things to say about the unattractive and unnecessary sheetpile, and were all very enthusiatic about the animals they were watching. With a crowd of beaver supporters, and some active healthy beavers, it was a very familiar and warm scene.

We came home in beaver-high spirits.


To turn your lights off tonight for Earth Hour. From Sydney Harbor to the Pyramids, lights will dim from 8:30 to 9:30 pm (local time) to show support for responsibly addressing Climate Change. I was a little worried about the implications of powering down until I read the website and saw that you were invited to still use your computer to upload videos on your dramatic hour.

That’s a sacrifice I can survive.

What else are you going to do at night between 8:30 and 9:30 without lights? You better bring your flashlight and come down to the beaver dam. I hear they are going without lights too.


Every now and then you run into the story of some patient farmer who doesn’t want to kill his beavers and spends his free hours scraping away the problems they cause. Maybe they have small children on the farm, or were involved in a wildlife hand-rearing project somewhere in their lives, or they just admire anything that works harder than them. Whatever the reason, its a lovely thing to stumble upon, especially when so many beaver stories end badly.

Meet Kristen Iden of South Carolina:

Our farm is blessed with a LOT of water. We have water on three sides of the property, and are basically a penisula into a small lake. We have a medium sized stream that runs around the back and curls around one side, a black water pond which spills into the “big water”. Perfect habitat for water loving creatures: herons, turtles, otters, egrets (Egrets? – I’ve had a few!) snakes, and the hero of this blog, at least one beaver.

Most local animal control and even state wildlife people consider beavers nuisances. In South Carolina, the preferred method of getting rid of a nuisance beaver is to kill it in a drown trap. Obviously, for an animal lovers like me and Joe, that is not an option. The beaver is just doing his job of making his home liveable. I met an orphan baby beaver, a kit, once. He was just as adorable and cute as any puppy or kitten and just as well behaved.

Ahhh Kristen, we are very very fond of you and your patience with beavers. Remember that it was North Carolina where stimulus money was going to blow up their dams and kill them. Reading your careful response makes me rethink the whole frustration.

As my brother and father know who have helped unblock and clean up after him, we have a very busy beaver(s). Unless the temperature dips below 30, or the water is flooding over our spillway, we wake up 5 days out of 7 with Mr. Beaver blocking our spillway overnight. So every day, Joe (or more normally me) goes down and fishes out all the crap he has piled in there the night before. I am utterly amazed at the size of some of the logs (think small telephone poles) that end up blocking our spillway, and the engineering that goes into the construction of his (or her) dam.

Goodness gracious, your brother and father help unblock the spillway? Are there more like you at home? I mean MANY more? Here’s my favorite part:

So low and behold, I was just cursing the beaver again when I caught a show on Animal Planet called “Leave it to the Real Beavers”. It introduced me to the Beaver Deceiver, a way to keep beavers from damming culverts using cedar posts and fencing. (See the Beaver Deceiver here: http://www.beaversww.org/solutions.html). So now my problem is to adapt the deceiver to a spillway, not a culvert.

The program features Skip, some lovely beaver photography, and a pesky waitress in Canada who forced her city to do the right thing by organizing public response. Its a great tale, and we showed the video at our First Night event. She goes on to say she wrote Fish and Wildlife for more information (ahhh you poor innocent soul. I don’t know about South Carolina but here Fish & Game would just shake their heads and say ignorantly, “those things never work”.) So I sent her blog to Skip and asked him to get in touch with her.

Beaver Kindness should always be rewarded.

BEAVER FESTIVAL XVI

DONATE

Beaver Alphabet Book

TREE PROTECTION

BAY AREA PODCAST

Our story told around the county

Beaver Interactive: Click to view

LASSIE INVENTS BDA

URBAN BEAVERS

LASSIE AND BEAVERS

Ten Years

The Beaver Cheat Sheet

Restoration

RANGER RICK

Ranger rick

The meeting that started it all

Past Reports

Story By Year

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