Private company

Casco Bay Lines

Logo: The logo may be obtained from Casco Bay Lines., Non-free logo, via Wikipedia3

Publicly run transportation company in Maine, US

Casco Bay Lines (also known as the Casco Bay Island Transit District; abbreviated to CBITD) is a publicly run transportation company that services the residents of the islands of Casco Bay, Maine. The seven islands are Peaks Island, Little Diamond Island, Great Diamond Island, Diamond Cove, Long Island, Chebeague Island and Cliff Island. The company has a fleet of five vessels.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

Casco Bay Lines (also known as the Casco Bay Island Transit District; abbreviated to CBITD) is a publicly run transportation company that services the residents of the islands of Casco Bay, Maine. The seven islands are Peaks Island, Little Diamond Island, Great Diamond Island, Diamond Cove, Long Island, Chebeague Island and Cliff Island.2

The story

The Casco Bay Steamboat Company began providing permanent year-round service to Casco Bay Islands in 1878. In 1881, the Harpswell Line began providing regular service to the outer bay islands. The lines merged in 1907 as the Casco Bay and Harpswell Steamboat Company. The company shut down in July 1919 as a direct result of World War I. A smaller company named Casco Bay Lines was formed that winter.

CBITD is a non-profit organization that was established through emergency State legislation in 1981. CBITD acquired CBL assets through bankruptcy proceedings to ensure the continuation of transportation service between their primary terminal hub in Portland, Maine, and the islands of Casco Bay. CBITD is governed by a board of twelve directors, ten of whom are elected from the island communities. One is appointed by the City of Portland; another is appointed by the Commissioner of the Maine Department of Transportation.

Many workers from the island communities depend on CBITD to get them to work every day and to take them home. All school children who live on the islands have to use CBITD service to get back and forth to school (this applies to sixth grade and up.) There is a car ferry that services Peaks Island and a freight ferry that services all of the "down bay" islands, including Long Island, Chebeague Island and Cliff Island.

The signature color patterns of the Casco Bay Lines fleet is (from bottom up): black, yellow, white and red. Casco Bay Lines was once located at Custom House Wharf but was moved in the 1980s to its current location on the Maine State Pier, at the former Franklin Street wharf. When the company was first established it used steamboats to transport its cargo. Some of the more famous steamboats included the Aucocisco, Maquoit and Machigonne. Its first ferry was the Abenaki, which operated on Casco Bay for nearly five decades.

The Portland Ferry terminal received a substantial renovation and addition in 2014 designed by Scott Simons Architects.

From Wikipedia’s article on Casco Bay Lines, shared under CC BY-SA 4.0.4

Products and brands

As of 2024, there are five vessels in Casco Bay Lines' fleet:

Bay Mist (built in 1985)

Machigonne II (built in 1987)

Maquoit II (the Casco Bay Mail Boat; built in 1994)

Read the full text

Aucocisco III (built in 2005)

Wabanaki (built in 2013)

Retired vessels

Cadet Merrycneag Longfellow

Machigonne

Maquoit

Quickwater

Abenaki (now a charter boat on the Hudson River in New York City named Half Moon)

Aucocisco

Aucocisco II (last operated as the Silver Star in Essex, Connecticut. Scrapped in 2007)

Emita II (sold first as a canal boat on the Erie Canal and again sold in 2018 to Harbor Country Adventures in New Buffalo, Michigan)

Sunshine

Gurnet

Berkley

Island Adventure (now tour boat Cosmo, operating in New York City)

Island Romance (sold in late 2014 to El Dorado Cruise LLC, Staten Island, New York)

Rebel

Island Holiday (sold in 2006 to Chattanooga Water Taxi, LLC; renamed Fat Cat)

Narmarda

Admiral

Tourist

Sabino (now a tour boat at Mystic Seaport in Mystic, Connecticut)

Emita

Joan

Edward B.

Sebascodegan

Pilgrim

Nellie G. III (formerly captained by Archie Ross)

Future expansion

Casco Bay Lines is undergoing a Fleet Evaluation project, which aims to replace the aging Machigonne II. The new vessel, which is currently under construction by Senesco Marine of Rhode Island, will feature a hybrid-electric engine, a first for CBL's fleet.

From Wikipedia’s article on Casco Bay Lines, shared under CC BY-SA 4.0.4

Sources

The numbers on this page point here. Each one links to the record it came from.

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