New Small Dam Projects in the Pipeline

By Ian Cooke, Executive Director of the Neponset River Watershed Association

Originally posted on the NepRWA blog on March 3, 2014

After some initial setbacks, our small dams program has regrouped and is now targeting three dams on Pine Tree Brook in Milton. We've also been working on a list of "micro" dams that can be remediated using volunteer crews.

Last spring, the Neponset Watershed Association launched a new “Small Dams Program” with the help of more than 100 local donors, a challenge grant and support from Patagonia and the NLT Foundation. The goal is to begin addressing more than 100 obsolete dams on the Neponset and its tributaries, which collectively take a heavy toll on the health of the river and the fish and wildlife that depend on it.

Harland Street flood control dam.

However, just a few months after launching the effort, we were sent back to the drawing board when the two pilot

Harland Street flood control dam.

sites we had selected ran into trouble with landowners who were initially supportive but were not ready to move forward in the end.

We have spent the last several months regrouping, and I’m pleased to report that we seem to be back on track with several new possibilities in the pipeline. During the fall we revisited the comprehensive survey of dams across the watershed that we had completed with the help of volunteers a number of years ago, filled in some of the missing pieces, and went through an exercise to prioritize potential restoration sites.

The result is a new focus on three small dams along Pine Tree Brook in Milton. The three dams lie on land owned by the Mass. Department of Conservation and Recreation (DCR) and/or the Town of Milton between Canton Avenue and Unquity Road, near the Ulin Rink. Two are small dams with no modern purpose, and no aesthetic or other public use. The third is the Harland Street flood control dam, which is one of only two flood control dams in the Watershed, but it appears that a minor modification could restore fish passage without impacting flood control operations.

The upper reaches of Pine Tree Brook are believed to support a wild trout population, and restoration at these three sites could potentially be a benefit to this iconic and relatively rare species. Over the longer term, modifications at the Pope’s Pond Dam further downstream could potentially open all of Pine Tree Brook to migratory herring and shad spawning, once fish passage is restored at the Baker Dam. However, work at Pope’s Pond would be considerably more complex and is not part of the immediate project.  dams along Pine Tree Brook. Click image to enlarge

Map of dams along Pine Tree Brook.

Following site visits with staff from DCR and the Milton DPW, a decision was made to submit these three sites to be considered as “priority projects” with the Division of Ecological Restoration (DER) within the Mass. Department of Fish and Game. Priority project status would officially put these dams on DER’s workplan, opening the way for technical assistance and potentially for additional funding down the road. In the meantime, we are getting ready for a site visit with a panel of volunteer experts representing various technical disciplines from engineering to biology, drawn from the ranks of academia and other interested professionals who live in the Watershed.

We are also working on pulling together a short list of “micro-dams.” These are mostly little more than a few rocks piled in a stream that could easily be disassembled by a small group of volunteers in an afternoon. Even though there isn’t much to these mini structures, they still have a significant impact on stream habitat and aquatic wildlife by fragmenting stream habitats, and trapping fish in small, isolated stream reaches. After doing some permitting work on these mini structures (yes, even things this small still need permits!) we hope to organize some volunteer dam removal parties.

Special thanks to Margaret Kearns of Instar Ecology who has been helping to lead our small dam program over the last few months.

For more information, contact Ian Cooke at cooke@neponset.org.

To read the original post, click here.

Eco-friendly Ice-Melt for our Wintry New England

Use Greener Ice-Melt

Reblogged from the Neponset River Watershed Association blog, originally found on Grist.org.

Common ice-melting products include rock salt (sodium chloride), urea, sand, sand-and-salt mixtures, ashes, kitty litter, calcium chloride, calcium magnesium acetate, magnesium chloride, potassium acetate, and Ice Ban. Mixtures of these products also are used.

Using any of these products has its pros and cons. Some products work better than others at lower temperatures, others are more expensive, some must be frequently applied, and some even make the ground slippery.

Each ice-melting product also impacts the environment differently (i.e., soil, plants, bridges, sidewalks and automobiles). Whereas some products harden the soil and make it too salty for plant growth, others overload it with nutrients or reduce oxygen levels in nearby streams and ponds, endangering animals. Still other products degrade concrete, roadways, bridges and cars.

Learn from Grist.org. Of the “green” ice-melt mixes tested, the productcausing the lease environmental damage contains: Magnesium chloride hexahydrate, calcium chloride (2-3%), potassium chloride (0.5-1%), sodium chloride (0.5-1%).

More information.

How ice-melt chemicals work and associated environmental effects.

Effects of road salt use. More information.

This post is from the Neponset River Watershed Association’s NepRWA Blog. The original post can be found at http://grist.org/article/de-salt-of-the-earth/. 

A Snowy Owl Update, from Mass Audubon

Snowy Owl Update

Reblogged from the Neponset River Watershed Association blog, first posted from a Mass Audubon blog

Currently New England is hosting a major incursion of snowy owls, many of which will likely spend the winter in our area.

Photo © Dave Larson

Typically these Arctic visitors tend to appear most frequently near the coast, but the first report this year was inland at Mount Wachusett in Princeton on November 17. Since then, snowy owls have been showing up all over Massachusetts. See a map of recent sightings on eBird.

Why So Many Snowy Owls?

The snowy owl is considered an “irruptive” species—one that responds to changes in the conditions on its home territory by moving elsewhere in search of food.  Some of the factors that may trigger these irruptions include variations in food supply in the Arctic, severe snow and ice cover in their usual wintering areas, or a superabundance of owls resulting from an exceptional nesting season prior to a southward irruption.

For many years it was assumed that snowy owl irruptions only occurred in years when the lemmings that comprise the snowy owls’ primary food in the Arctic were in short supply, thus forcing the starving owls to move south in search of food.

However, Norman Smith, sanctuary director of Blue Hills Trailside Museum and lead of Mass Audubon’s Snowy Owl Project says “We actually see the most snowy owls in New England after an Arctic lemming population boom, not bust.” High lemming populations improve breeding success, and irruptions typically consist mostly of hatch-year birds (ones born this year).

Where to See Snowy Owls

Snowy owls arriving in Massachusetts tend to seek local habitats that mimic the Arctic tundra where they spend most of their lives, such as large salt marshes, extensive agricultural fields, and even airports. Popular sightings include Westport, New Bedford, Nantucket, Orleans, Duxbury Beach, and of course, Plum Island.

Accordingly, if you are passing a large open field this winter, that white spot in the distance might only be an errant piece of plastic, but it could also be a snowy owl!

Reposted from a Mass Audubon blog, posted December 7, 2013 by Hillary. Text by Marj Rine, Photo © Dave Larson

This post is from the Neponset River Watershed Association’s Neponset Nature Blog. The original post can be found at: http://www.neponset.org/happenings/neponset-nature-blog/snowy-owl-update/.