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The Townshend Dam was built by the Army Corps of Engineers in 1961 for flood control purposes.

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Digging for some answers

Army Corps of Engineers offers dredging plan at Townshend Dam

TOWNSHEND—Come spring, the U.S. Army Corps of Engineers will be digging in the dirt at Townshend Dam.

And that’s good news for advocates of the man-made lake, where large amounts of sediment have choked off public recreation and the economic boost that once accompanied it.

The Army Corps plans to remove approximately 7,000 cubic yards of sediment from the dam this spring “in order to restore beach usage for the upcoming recreation season,” said Tim Dugan, a spokesman for the federal agency’s New England District.

He added that officials also are trying to come up with more comprehensive solutions at the dam site in West Townshend.

The Corps is “evaluating options for long-term sediment removal in the main body of the reservoir in order to establish a long-term plan of action to address the sedimentation issue,” Dugan said.

The Army Corps’ actions come after public pleas from local residents who are dismayed by chronically low water levels at Townshend Dam.

The federal government built the massive structure on the West River in the early 1960s, and its primary purpose is flood control. As of 2014, the Army Corps estimated that the dam had prevented more than $141 million in damage downstream.

Fewer visitors

The lake had long been a recreation draw for swimmers and boaters, as well. But the number of visitors to the dam site and to adjacent Townshend State Park has slipped as lake levels have sunk.

Tropical Storm Irene was a prime culprit. After the 2011 storm’s floodwaters raced through the valley, Townshend Lake’s beach area “was silted up so that, if you did go in there, you’d get stuck in the mud up to your knees,” an Army Corps official has said.

The Corps spent about $28,000 on a dredging project in 2013, allowing the swimming area to reopen.

But upstream erosion problems have continued. Last year, though the beach technically was open, it “was not used very often due to the sedimentation and low water levels due to the drought,” Dugan said.

Local officials have sought help in solving the problem. Several state legislators and all three members of Vermont’s congressional delegation have responded to various degrees.

In a recent letter to Townshend officials, U.S. Rep. Peter Welch, D-Vt., said his state director has visited the dam site and has been working with the Army Corps, the state Agency of Natural Resources, and representatives from the offices of U.S. Sens. Patrick Leahy, D-Vt., and Bernie Sanders, I-Vt.

Welch also wrote that the Army Corps conducted a study of the lake last fall “as an initial step.”

Dugan said that study actually was a topographic and bathymetric survey. Bathymetry is the science of measuring the depth of oceans, seas, and lakes; the term also refers to mapping the floor of a body of water.

Measuring sediment

Information from the survey “was utilized to establish the quantity of sedimentation that has occurred in the swim beach area, as well as the main body of the reservoir,” Dugan said.

That information led to the Corps’ planned silt-removal work this spring.

Townshend Selectboard Chairwoman Kathy Hege said she hadn’t yet heard about the Corps’ plan but was encouraged by the expected activity at the dam.

“Every little bit will help toward restoring the lake to having some kind of value for the town,” Hege said.

Without some kind of follow-up work, however, this spring’s silt-removal project eventually may be erased by further sedimentation.

It isn’t yet clear what long-term proposals the Army Corps might be developing and how they would be funded. A top regional Army Corps official last year told the Connecticut River Valley Flood Control Commission that the agency has “limited dollars” to operate a multistate district that includes 33 flood-management projects and more than 100 recreational areas.

Welch, in his letter to Hege, pledged ongoing assistance and said he’s hoping that, “over the course of time, we will be able to see significant steps taken to improve [Townshend Dam’s] condition.”

“We all share an interest in a comprehensive solution that restores the lake to a condition where it is once again an attractive location for boating, swimming, fishing, and other recreational activities,” Welch wrote. “It is my hope that this study will provide a roadmap for the investments and actions that will be required to achieve this goal.”

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Originally published in The Commons issue #392 (Wednesday, January 25, 2017). This story appeared on page A1.

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