Project Description

As the last of the four key pieces of the Penobscot River restoration effort to be implemented, this project involved the construction of a major bypass channel around the Howland Dam (pictured below). The project significantly improves access to nearly 1,000 miles of historic habitat for 11 species of native sea-run fish while

The project included substantial retrofits required for the dam, as well as design and construction of a 100-foot wide bypass channel around the Howland Dam. The bypass channel design elements included providing a high level of service, as well as stability and function over a broad range of design flows spanning from 250 cfs to nearly 12,000 cfs. Kleinschmidt and Inter-Fluve collaborated with the Penobscot Trust on the design of this project. Construction was completed in 2015. The design included consideration of landscape design and public access components, and renderings to depict the proposed condition for project stakeholders.

Howland Dam is a run-of-the-river dam on the Piscataquis River, a major tributary which joins the Penobscot in Howland.

The 100-foot wide bypass channel was constructed in 2015.

The channel was designed to function over a broad range of flows ranging from 250 cfs to nearly 12,000 cfs.

Kleinschmidt and Inter-Fluve collaborated with the Penobscot Trust on the design of this project.

Mike Burke (left) and Nick Nelson (right) recording stream flows.