   "They've paved over a lot of memories, as far as I'm
concerned," Dawn Wells says.  Hers and a lot of other people's.
CBS Studio Center recently filled in and laid asphalt over the
lagoon area where Wells gained fame in the cast of "Gilligan's
Island."  Located in Studio City, and currently home to
"Seinfeld," "Cybill" and "Roseanne," CBS Studio Center is
expanding its production facilities with seven new sound stages.
Covering the lagoon made way for additional employee parking
spaces.  "CBS built the lagoon [in 1964] at great expense,"
recalls Wells, who played Mary Ann. "We'd shot the first two
episodes in Malibu and Zuma, but the fog was a problem."  Bob
Denver, who played Gilligan, has fond memories of the set.
"There were the palm trees, tropical plants, the waterfall--it
was gorgeous. And with the sand, it was like a kids' paradise in
summer. More like a playground.  "Forever I was falling in and
out of the water. In the summer, all the crew would be wearing
swimming trunks. In the winter, they'd all