Excerpt:

A Carmichael, Calif., company is currently dredging Alameda Point’s Seaplane Lagoon. AIS Marine Service’s (AIS) mechanical dredger Myrtle Irene is equipped with a bucket that can hold some seven and three-quarters cubic yards of material and can dig as deep as 50 feet. If needed, AIS can fit the dredger with special-purpose tools that include buckets, tongs and a rotary head.