California Republican Rep. Wally Herger is retiring from Congress after 13 terms in office, according to a source briefed on his plans.

Herger plans to announce his retirement at 2 P.M. eastern time, the source confirmed. His decision was first reported by the California blog FlashReport.

Unlike his fellow California Republican Elton Gallegly , who announced his retirement over the weekend, Herger was not squeezed out by the state’s redistricting map — his 13th district seat will remain safely Republican.

State Sen. Doug LaMalfa (R) plans to run for the seat and hire Herger consultant Dave Gilliard as his campaign manager, the source confirmed. Herger endorsed rice-farmer LaMalfa in his 2010 state Senate primary.

Herger denied any plans to retire as recently as last August. Back in May, Gilliard told a local paper, “As Wally Herger’s longtime consultant I can tell you with 100% certainty that he is not retiring and that he is running for reelection in 2012.”

A staunch conservative and frequent critic of President Obama, Herger sits on the powerful Ways and Means Committee but has never held a top leadership post. But his weak committee fundraising left Herger passed over as Ways and Means chairman in favor of the less-senior Rep. Dave Camp (R-Mich.) in 2008.

Herger is the fourth House Republican to announce his plans to retire without seeking higher office.