from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A device or structure, such as a drawbridge, counterbalanced so that when one end is lowered the other is raised.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a counterbalanced structure having one end that rises as the other lowers
from the GNU version of the Collaborative International Dictionary of English
- n. In mechanics, an apparatus on the principle of the seesaw, in which one end rises as the other falls.
from The Century Dictionary and Cyclopedia
- n. An arrangement in bridges by which one portion balances another.
- n. A form of bailing-scoop.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a structure or device in which one end is counterbalanced by the other (on the principle of the seesaw)
But if you look at it, it's not a so-called bascule bridge.
It’s called a bascule, and it lifts like a kind of gigantic one-sided see-saw.
Also note the second bascule bridge, and lots of Transit/HOV lanes (and the resulting added width).
In Mystic, view to the south from the bascule bridge (1922) over the Mystic River.
Having a second bascule bridge can allow for dedicated HOV/Transit lanes across the Montlake Cut.
To expect that the existing bascule bridge can handle our needs for the next 90 years is not realistic, especially when the current bridge is already the greatest constraint to transit, pedestrians and bicycles going across the Montlake Cut.
The existing bascule bridge has indeed been recognized as a bottleneck for decades, but the “benefits” of a second drawbridge in this location remain unknown, unanalyzed in isolation, and the alternatives are yet to be explored.
The 1925 bascule bridge is a wonderful landmark, and its new mate should be given equal care in its design.
The second bascule bridge is the only way to provide dedicated HOV/Transit lanes across the Montlake Cut.
The capacity of Montlake and the bascule bridge would increase because the outer lanes would be fully utilized by carpools and buses, instead of mostly clogged with SOVs.