Thursday, August 9, 2018

Beavers and Murphy's Law

Because of heavy rains we've had this month, the lower pond was growing faster than expected. So yesterday, I contacted the NH Wildlife Society to make sure I could apply for another grant to put in a pond leveler at the far end. They said that they would be happy to accept the application, but during the night Murphy's Law kicked in, and the dam at the far end breached, draining the lower pond.  The good news is there was no damage to common areas or condo units and thanks to the pond leveler, the upper pond is in no danger.

The beavers have already begun to rebuild, but there are still questions and concerns that will have to be answered in the days to come. 

How long will it take the pond to recover? Were their damming efforts taking place during the breach and now that the pond is drained, will they continue to dam or will they abandon their efforts?

The pond leveler in the upper pond is functioning perfectly and thanks to heavy rains this week, it is feeding the lower pond water that it would not be getting otherwise. Also, the fact that we had the pond leveler installed was, is, and will be added protection against breach of the main dam.  

However, the water is flowing through the culvert pipes at a rate that would normally attract beavers to the outflow culvert cage installed this spring. Will they concentrate efforts on the breached dam at the far end? Will they try damming the culvert? 

We certainly won't be needing another pond leveler for a while, but we may have to modify the outflow protection, if the beavers try to dam it. I guess we are going to have to watch and leave it to the beavers.

The only immediate action that is required has been taken.  I left a message with mosquito control and am awaiting a call back.  A few years ago, I had contacted them to see if we had anything to be concerned about.  At that time, they said the pond itself was no problem, but they put us on their watch list and check us during normal inspections.

1 comment:

  1. Interesting development Art. A bit unusual when beavers are actively building a dam. As you pointed out the dam with the Pond Leveler was not damaged by the storm, but the lower (and newer) dam downstream did fail despite the beavers actively building it up. I bet you are correct that the Pond Leveler helped protect the integrity of that dam by lessening water flow over the top.