By Alice Waugh
The MBTA plans to install three monopole towers along the commuter rail tracks in Lincoln to comply with a federal mandate for emergency train stop controls. The concrete towers will range in height from about 65 to 75 feet.
Because the pole sites are within the MBTA’s right of way, the agency is not required to obtain approval from town land use boards unless the sites fall within a wetlands area, said Director of Planning and Land Use Jennifer Burney, adding that she heard about the plan only indirectly.
At least one of the towers will have “multiple arrays” of antennas for both train control and passenger Wi-Fi access, according to a Request for Determination of Applicability submitted to the Conservation Commission by Ramaker & Associates, a Wisconsin engineering firm hired by the MBTA. The tower will also support a radio equipment cabinet, and a 5-by-5-foot pad is proposed to support future radio equipment.
In response to a request from the town, the MBTA will attend the Lincoln Planning Board meeting on April 26 to give an overview of the project and answer questions. Representatives from the Conservation Commission and the Walden Woods Project will also attend, Burney said.
The monopoles will carry telecommunications equipment for a computerized system that combines GPS and wireless radio to monitor trains for excessive speed or proximity and to stop them before a collision or derailment can result. The U.S. Department of Transportation’s Positive Train Control regulations stem from the Rail Safety Improvement Act of 2008.
The MBTA plans to install a total of 330 poles along the commuter rail system starting in April with the Fitchburg and Rockport lines, said Jason Johnson, deputy press secretary for the MBTA.
The MBTA has also entered into a partnership with inMotion Wireless to offer commuter rail and boat passengers free Wi-Fi and broadband Internet access. The contractor paying for the monopole installations will also “have the option to examine private revenue generation” by adding antennas for cell phone companies and other commercial users, Johnson said.
To work properly, the poles need to be a maximum distance apart depending on the curvature of the track. They are being spaced as far apart as possible (an average of 1.3 miles) to minimize the number of poles required, and sites in “the least obtrusive areas available” were chosen, Johnson said. “In addition, this infrastructure has been designed as a multi-use structure that could support the needs for additional projects in the future, limiting the need for redundant building on the right of way,” he said.
Burney said MBTA officials told her that they might be open to suggestions about altering the locations of the monopoles only if there were “very small adjustments” of less than 30 feet involved. They have also agreed in principle to a “balloon test” where a tethered balloon is sent aloft at each site up to the height of the proposed pole so people in the area can see how high the top of each pole will be, and from what distance it can be seen, she said.
The Massachusetts Historical Commission has requested a “viewshed” analysis and archeological survey of the planned monopole site near where Route 126 goes over the train tracks. That area is close to the Walden Woods historical landscape as well as a Native American cremation and burial site that has not yet been systematically investigated.