Driver Gordon Dyche was jailed for four years today for causing death by careless driving in a crash that killed a family in Llanidloes, mid Wales last year.
Mr Dyche was also given a further six months for a previously suspended sentence for handling stolen goods.
Mr Dyche clipped Denise Griffith's car while trying to overtake, sending it careering into Llyn Clywedog, a man-made reservoir just outside the town.
Ms Griffith lost her husband, mother and two foster sons in the tragedy.
During the trial at Caernarfon Crown Court it was also revealed that Dyche had previous convictions for driving offences.
When the incident happened in April 2011 he had just finished a driving ban for driving while disqualified and without insurance in January that year.
Ms Griffith told the court: "I know my life has been ruined. It's the most lonely, lonely place to be."
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