As crews continue work on , they are also restoring a critical nesting site for endangered California least terns.

The lagoon site is one of the most successful nesting sites for the migratory ground-nesting birds, said Tim Pesce, the senior environmental planner for the San Diego Association of Governments (SANDAG).

California least terns were . There were only an estimated . The Batiquitos Lagoon nesting site was first built in the 1990s.

"Over time, it has started to erode a little bit," Pesce said. "So we are pushing that sand back up against the site to restore it back to its original size and to prevent it from eroding in the future.”

Restoration work began earlier this fall after the nesting season ended in August. SANDAG used sand dredged from the rail line project to restore t

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