Welcome!

The Cement Masons and Plasterers Trust Funds (for WA, AK, and E. WA/ID) was established to provide medical, retirement, and 401(k) account benefits for their eligible members and their dependents through the collective bargaining process.

This site provides general benefit information, forms and other Trust related items. Summary of Benefits and Coverage (SBC) and Glossary of Terms can be reviewed here.

Appointments:
You can now book in-person appointments online at our Mercer Island Office! To book an appointment with a representative, please click here.

Retirement Planning Meeting

The retirement planning meeting will be held on March 17 at 5PM at Local 528

OPCMIA LOCAL 528
6362 6th Ave S.
Seattle, WA  98108


January 2026 - Form 1099-R Mailing

Please click here for more information about your 1099-R tax form.