Civil-commitment treatment (men) — Section 35 · Civil-commitment treatment center (DOC-operated) · Massachusetts DOC

Massachusetts Alcohol and Substance Abuse Center (MASAC) at Plymouth

Plymouth, Plymouth County, Massachusetts

Visiting schedules change without notice. Always call before traveling.

Call Visiting Office: (508) 291-2441 Info last verified: June 2026

A Massachusetts DOC–operated treatment center in Plymouth for men civilly committed for substance-use treatment under Section 35 — scheduled to close by December 31, 2026.

Statewide rules that apply at every Massachusetts state prison

These rules are set by Massachusetts DOC and apply at every unit. The full list — including all permitted and prohibited items and the approval process — is in Visiting in Massachusetts.

Dress code

Dress modestly and avoid clothing that resembles what incarcerated people or staff wear; no revealing, sheer, or provocative clothing.
Each prison publishes its own visiting dress code and item limits — confirm them with the facility before traveling, since a visitor who is dressed out of code can be turned away.

ID: Every visitor must be on the incarcerated person's approved visitor list and submit a visitor application to the prison; the Department runs a criminal-history check before approval. Adults must show a valid government-issued photo ID at each visit. The incarcerated person can add new visitors only during set windows (the first 15 days of March, July, and November).
What to bring: Bring only a photo ID and what the specific facility allows in the visiting room — phones and bags are not permitted. Money for the person is sent through Access Corrections, never handed over at a visit; confirm each facility's item and locker rules before visiting.
Scheduling: Massachusetts has no statewide online visit scheduler — each prison schedules visits by phone and sets its own days and hours, so call the facility to arrange a visit and confirm the schedule. A newly committed person is held at a reception center first — Souza-Baranowski for men, MCI-Framingham for women — before transfer to a permanent prison.

Full statewide rules: Visiting in Massachusetts

Overview

The Massachusetts Alcohol and Substance Abuse Center, known as MASAC at Plymouth, is a Massachusetts DOC–operated center for men civilly committed under Section 35 (Chapter 123, Section 35) for substance-use treatment. The men held there are committed for treatment, not serving criminal sentences. It is the only Section 35 facility overseen by the DOC. MASAC is scheduled to close by December 31, 2026, as the state moves Section 35 treatment to health-agency facilities.

What Makes MASAC Different

It holds men civilly committed for substance-use treatment under Section 35, not people serving criminal sentences — so visiting, calls, and contact are arranged with the center and differ from a prison.
It is the only Section 35 facility overseen by the DOC, and it is scheduled to close by December 31, 2026, as Section 35 treatment moves to health-agency facilities.
It is in Plymouth, in southeastern Massachusetts (Plymouth County), on the state DOC grounds in the Myles Standish State Forest area.

Visiting

The statewide MA DOC rules above — the approved visitor list, the dress code, ID, and item limits — apply at MASAC. The center’s own arrangements:

The full approval process is in Visiting in Massachusetts.

Getting There and Parking

The center is on Bump Pond Road in Plymouth, in southeastern Massachusetts, on the state DOC grounds in the Myles Standish State Forest area.

Distances are approximate, based on map routing. Visitor parking is on site.

Nearby Services

The Plymouth area has gas, food, and lodging. The nearest 24-hour emergency room is in the Plymouth area.

Mail

Incoming personal mail goes to the prison — Massachusetts does not use an off-site mail vendor. Address it with the person’s full name and commitment number and the facility’s mailing address (above); all incoming mail is opened and inspected. Legal mail is opened only in the person’s presence. Full rules are in Mail & Packages.

Learn More

For detailed information about visiting and communicating with someone in a Massachusetts state prison:

Visiting in Massachusetts — the approved visitor list, dress code, and scheduling by phone
Mail & Packages — mail to the facility and what gets inspected
Phone & Video Calls — free Securus calls, video visits, and messaging
Sending Money — depositing through Access Corrections
Medical & Mental Health — sick call, grievances, and the Ombudsman
Transfers & Finding Someone — reception, classification, and VINELink

Sources

This page is compiled from the following publicly available sources. Policies change without notice — confirm current details with the facility before relying on them.