The Wallace Pack Unit (P1) is a Texas Department of Criminal Justice (TDCJ) prison in unincorporated Grimes County, Texas, 5 miles (8.0 km) south of Navasota. It is along Farm to Market Road 1227, in proximity to Houston.It opened in September 1983 and is named after Wallace Pack, warden of Ellis Unit who was drowned in 1981.As of 2014 the prison has hundreds of elderly prisoners above the age of 60.
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