On a balmy day in April 1977, Gov. Mills E. Godwin and a bevy of prison officials, some dressed in seersucker suits, performed a ribbon-cutting ceremony for a cluster of grand new buildings. The cost of the state’s newest maximum-security prison would run to $19.6 million. The set of five matched units, each housing 72 inmates, promised to become a bulwark of economic opportunity across hundreds of square miles of job-poor Southside Virginia.