Souhegan Watershed Association


The Watershed



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We will continue monitoring again for the 2019 season. We can always use new monitors to keep coverage continuous. If you have the time and interest, please check out the link on the home page. It takes about 30 minutes early in the morning every two weeks June thru September. Right now we need monitors for two sites in Merrimack, one on the Souhegan and one on the Merrimack.


Canoe trips for 2019 will be announced on our Facebook page whenever they're scheduled during the season. If anyone would like to lead a trip, please feel free to post it there.

Interested in kayaking on the Souhegan? Check out the Blue Water Canoe Trail page to find out where to put in and take out and what to expect.


SWA & SoRLAC hosted a workshop on identifying invasive plants and animals for hikers, fishermen, boaters, swimmers, water quality monitors, and other interested citizens a while ago. If you have suspicions of invasive plants along the river, please let us know what you can - especially note the exact location. We can't remove them if we don't know where they are.

Want to know more? Here is a link to NHRC River Runners. Go to the links at the bottom of the page for specific information on invasives and the threats to NH.


Anyone can dispose of any kind of drugs (illegal, prescription, over the counter) at a secure drop box at most of the police stations in the area. We urge people to use this way to dispose of drugs - especially prescription drugs. If they are flushed down the toilet, they will get into the Souhegan or Merrimack River. This has been a big problem affecting the animals living in or around the river - and they can't move. Please leave identifying information on the container to make disposal proper.

The police want to get drugs off the street; we want to keep them out of the rivers.

Another less effective way to dispose of your drugs is to seal them in a plastic bag with some wet coffee grounds or kitty litter and dispose of this in the regular trash.


This is a big problem along the Souhegan! Some landowners want to armor their riverbank by placing rocks or other debris along the riverbank to prevent the river from eroding into their property and to keep the river from moving around in its channel - which is what healthy rivers are supposed to do naturally. Any attempts to do this is illegal and requires permits. SWA is opposed to riprapping unless there is a pressing need such as protecting roads and bridges.

The McCabe property running upstream from the Turkey Hill bridge in Merrimack is the latest and most invasive on the entire river. It joins Brewster Fields in Amherst in extensive, river-damaging riprapping. Check it out. It will destroy this section of the river forever. If you would like to object, send an email to DES, who gave it a permit.


Interested in helping plot hiking trails in the watershed? We are too! Let us know if you'd like to help.

Web pages by Richard Hart.
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