The incident occurred December 4, 2005 at the "Delfin" swimming pool, owned by the Chusovoi Metals Plant, when a 100-square-meter section of roof collapsed, killing four women and 10 children.
Alexei Shvetsov was charged with concealing information about a situation posing a threat to life and health.
Following an inspection of the building housing the swimming pool a year before the tragedy, Shvetsov and two other experts, Kelsy Sannikov and Anna Akulova, submitted falsified reports on the condition of the roof's support structures.
"For this reason, no repair work was done," the prosecutors said.
The commission set up by the pool owner concluded that the collapse of the roof was caused by the buckling of a corroded metal support beam and faulty construction.
Shvetsov will serve his time in an internment camp, a less punitive institution than a fenced-off prison camp.
Charges against Sannikov were dropped in April 2006 in line with an amnesty announced on the centenary of the State Duma, Russia's lower house of parliament.
Akulova fled prosecution and has been placed on the international wanted list.
