The Watertown Dam Just Got Funded. Your Walk Along the Charles Won't Look Different Yet.

"The real driver for dam removal in that location is to restore the aquatic ecosystem."

That's Lisa Kumpf, river restoration director for the Charles River Watershed Association, talking about the concrete structure most Watertown residents walk past without a second thought. If you've done the Greenway loop near Watertown Square, you know the spot: the water goes flat and slow above a low wall, then drops white and loud on the other side, with a crowd of gulls and the occasional heron working the churn below for stunned fish. That's the Watertown Dam. It has stood there in some form since before the American Revolution, and this year it quietly crossed a threshold nobody who walks past it would notice just by looking. State funding for its removal is now written into a pending piece of legislation. The dam itself hasn't moved an inch.

An 180-Foot Wall That Stopped Doing Its Job Decades Ago

The structure people see from the Galen Street Bridge is a 180-foot-long, 8-foot-high concrete weir owned by the Massachusetts Department of Conservation and Recreation. It was built to power mills. It hasn't powered anything in a long time, and it provides no flood control either, because it's what engineers call a run-of-river dam: incoming water simply flows over the top, with no gates to hold anything back before a storm. An inspection in 2016 rated the structure "poor." A follow-up review in 2021 upgraded that to "fair," meaning it has maintenance problems but nothing structurally urgent. DCR's own Office of Dam Safety still classifies it as a "Significant Hazard Potential" structure, the category reserved for dams whose failure could threaten homes and roads downstream in Watertown and Newton, even if collapse isn't imminent.

Here's the detail that surprises most people who assume removing a dam near their house sounds risky: because this dam holds back so little water to begin with, initial modeling found that taking it out would result in slightly lower flood elevations upstream, not higher ones. The wall isn't protecting anyone. It's just old.

Five Years of Studies, and a Fall 2026 Turn

The push to remove it isn't new. A feasibility study from the state's Division of Ecological Restoration came out in June 2021 and found removal was possible. DCR then hired an engineering consultant to run a full alternatives analysis, which meant more public process: a third community meeting was held on November 20, 2025, at the Watertown Free Public Library, and the comment period that followed stayed open through December 19, 2025. A final meeting on the study's findings was expected in spring 2026.

What changed this year is money. According to the Charles River Watershed Association's own legislative tracking, the state's environmental bond bill now moving through the legislature includes a specific line item funding Watertown Dam removal, along with a separate line to study dredging a silted section of the Charles nearby. As of this year, the House and Senate are still reconciling differences between their versions before sending a final bill to the governor. It isn't law yet. But for a project that spent most of a decade as a study, landing an actual funding commitment is the biggest step it has taken.

None of that means construction starts soon. The Watertown Conservation Commission has been direct about where things stand: DCR has not yet filed an application to remove the dam, and until it does, there's nothing to permit. Everything to date is informational.

What the Wall Is Actually Blocking

Every spring, alewife, American eel, American shad, blueback herring, and rainbow smelt try to migrate up the Charles into Watertown to spawn. Some alewife and blueback herring can climb the fish ladder built into the dam. Many can't. The ladder sits on the shallower side of the river, and fish that prefer the deeper, colder water often never find it. A study by the Massachusetts Division of Marine Fisheries and the U.S. Fish and Wildlife Service went further and found that female American shad specifically cannot climb the ladder at all.

That's not an abstraction if you've ever stood on the Galen Street Bridge in late spring and watched birds work the water below the dam. One longtime volunteer fish counter for the watershed association put it more bluntly in a public comment last fall, describing fish stuck below the ladder as an easy target for gulls and herons: they "might as well be in a barrel." The dam has been doing that, one way or another, since 1783, when colonists raised its height to boost mill power even though state law at the time required fish passage, cutting off runs that Nipmuc communities upstream in Natick had relied on.

Down the River, a Preview of What Comes Next

If you want to see what a former mill dam looks like once nature reclaims it, you don't have to wait for Watertown's project to move. Head out on the Blue Heron Trail, a roughly 3.5-mile loop mapped in the Newton Conservators' 2026 Trail Guide that starts at the Galen Street Bridge and follows the river through Watertown into Newton. Not far upstream, past a 1983 footbridge named for a local advocate who fought to preserve open space here after the construction of Route 128 destroyed parkland in the 1950s, you'll pass the remains of the Bemis Dam, built in 1778 to power mill buildings that no longer exist. It's just remnants now, a low structure the river mostly ignores. Farther along, the trail crosses a 140-foot suspension bridge completed in 2005, then climbs into Hemlock Gorge, crosses the historic Sudbury Aqueduct at Echo Bridge, and eventually passes the Charles River Museum of Industry and Innovation in Waltham, housed in an 1814 mill building that explains why so many of these structures exist in the first place. This stretch of river has been rearranged by industrial decisions for two centuries. The Watertown Dam is just the most visible one still standing.

Compare That to Natick, Where the Digging Already Started

If Watertown's project sounds slow, it's worth seeing what an active dam removal actually looks like a few towns over. Natick's own Charles River Dam project, downstream at Grove Park and Old Town Park, has been under construction all summer. Site mobilization began June 22, 2026. The impoundment behind the dam was drawn down through mid-July at a controlled rate of about a foot of water per day, and spillway demolition using a hydraulic hammer began July 23, 2026. Old Town Park has been closed daily during active work hours, boating is restricted near the site, and the last boat launch before the construction zone is at Eliot Street near Justin Road. That's what a funded, permitted, in-progress dam removal looks like on the ground: closures, equipment, visible change to the riverbank week by week.

Watertown isn't there. It's at the funding stage Natick passed through years ago, before permits were filed and before anyone closed a park. Anyone hoping to see a similar transformation at Watertown Square this year will be looking at the same slow spillway they've always seen.

What's Actually Happening on the River Green This Month

While the dam debate plays out in committee rooms, the stretch of riverfront just downstream keeps its own calendar. Arsenal Yards sits directly on the Charles in Watertown's East End, and its outdoor fitness series continues through the fall, with an F45 session set for September 8 and a Rumble Boxing session on September 15, both at the development's outdoor spaces near 130 Arsenal Yards Blvd. Fall Falladays, the development's annual autumn festival on the River Green and Bond Square, is expected back this October, typically with a pumpkin carving contest and a call for donations to the Watertown Food Pantry. None of that depends on what happens in the State House. It's just the neighborhood doing what it does every fall, on the same river the dam debate is about.

What to Actually Watch For

If you want to track this instead of just hearing about it secondhand, the two things that matter are a governor's signature on the bond bill and, after that, an actual permit application from DCR to the Watertown Conservation Commission. Either one would be genuine news. Until then, the water below Watertown Square will keep dropping over the same 180-foot wall it has for longer than the country has existed, and the gulls will keep working the same stretch below it.

Watertown rewards the kind of attention that notices when a small line in a legislative update means more than it looks like on the surface. If you're thinking about what else is changing in this town, or want a neighbor's read on what a piece of local news actually means for where you live, The Equinox Group is always glad to talk it through. Schedule a consultation whenever it's useful, no dam removal required.