In the "Jurassic Park" universe, when did "Jurassic Park: San Diego" begin construction?

In the Jurassic Park universe, Jurassic Park San Diego began construction in 1985. The answer is derived from the fact that in the film "Jurassic Park: The Lost World," it is mentioned that construction on the San Diego park started two years after the original Jurassic Park on Isla Nublar. As the first park was planned and construction began in 1983, it follows that the initiation of construction for the San Diego park occurred in 1985.