The pound lock was first built in China in 984, by Qiao Weiyue (乔维岳) on the Grand Canal. Two gates, water let in until the levels meet, then the far gate opens.Qiao Weiyue's first gates were about 250 feet apart, and the whole lock had a roof over it like a building.The V-shaped gates that swing open here are miter gates. They are credited to Leonardo da Vinci in the late 1400s.The water rises fast at first and slows near the top: the flow through the paddles falls as the two levels close in.Alameda became an island in 1902, when the tidal canal to Oakland was finished. Digging had started in 1874.
This is Alameda, shrunk to a small island, and every place on it is something I've made or done. You drive my FTC robot, or take the ferry.
W Sdrive forward and back
A Dturn
Q Estrafe sideways (mecanum wheels)
Spacelaunch a ball
Rread a sign
Vtake the ferry: the island floods into rivers
Misland map: teleport anywhere
Ntime of day
Ttutorial: what every button and key does
Conrad Spaudie
Everything on the island is also on the classic site. The places:
Working on nowWhat I'm working on now: Rung, readtutor, Siteline and Scrubs & Whiskers, at the foot of the pier.