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Supervisor Gayle Uilkema poses Thursday, Jan. 20, 2005, at the community center in Lafayette, Calif. (NOTE: THIS ONE OF THE 24 PORTRAITS.) (Contra Costa Times/Bob Pepping)

MARTINEZ -- Supervisor Gayle B. Uilkema of Lafayette will retire from the Contra Costa Board of Supervisors at the end of her current term of office in January, 2013.

Her office announced the decision Tuesday morning.

Supervisor Uilkema has served on the Board for 15 years, the longest tenure among current board members. Approximately fourteen months remain in her current term of office.

She also was for 19 years as a Lafayette City Council member and four-time mayor. She was first elected to the council in 1978.

In the news release, she said she was "extremely grateful for the public trust that has been placed in me for such a long time" and promised to continue working diligently for her constituents.

Uilkema's District 2 takes in Orinda, Moraga, Lafayette, the San Ramon Valley and part of Walnut Creek.