[6][7] In January 1972, the Twin Transit Company planned to shut down but was ordered by the Washington Utilities and Transportation Commission to continue for 30-days per its franchise agreement while the local government searched for an alternative.

[8] The company debuted a short-lived dial-a-ride service in April 1972 to save costs, but it was shut down three months later due to operating losses.

[11] The Centralia city government established its own single-route bus service in December 1973, using two used coaches purchased from the Bellingham Transit Company,[12][13] but it attracted few riders.

[15] A household utility tax of under $1 per month was proposed to fund an expanded public transit system and an advisory vote was placed on the November 1975 ballot in Chehalis and Centralia.

[20][21] The Lewis Public Transportation Benefit Area Authority, branded as Twin Transit, was created by the ballot measure and began collecting household utility taxes ahead of a launch scheduled for 1977.

[23][24] In its first month of free service, the system carried 9,000 passengers but suffered from maintenance issues that affected its older coaches.

[28] In 2023, the transit organization reported a 35% increase over the prior year, with over 720,000 miles driven, more than 26,000 stops, and 13,000 routes taken for free by students.

[31] The same year, Lewis County Transit, via the PNW H2, partnered with the Centralia School District on a pilot plan, known as the Renewable Energy Vehicle and Infrastructure Technician (REVIT) training program, to encourage local students to enter in the educational and professional fields associated with green energy.

DARTT is funded directly through Twin Transit and fees, and received additional financing in 2021 from a grant by the National Center for Mobility Management and Community Transportation Association of America.

[43] The central hub for Lewis County Transit is the Mellen Street e-Transit Station located next to I-5 in Centralia.

[36] Additional hubs are planned within Chehalis near the port and at an existing park-and-ride lot adjacent to the State Route 6 interchange.

[45] Lewis County Transit plans to open the first hydrogen fueling station in Washington on Port of Chehalis property.