www.dnr.state.il.us

Pat Quinn, Governor

DNR Links Skip to Content Skip to State Links

 IDNR Home
 IDNR Home (new)
 Agency Offices
 Disabled Outdoors
 Freedom of Information Act
 Get Involved
 Grant Info
 Great Lakes Restoration
 Hunting
 Fishing
 License / Permit / Register
 Kids & Education
 Law Enforcement
 Mandatory Safety Programs
 Lodges / Leasing
 More Links
 Outdoor Recreation
 Parks & Recreation
 Press Releases
 Publications
 State Museums
 World Shooting & Recreational Complex
 DNR A to Z

 DNR
 Illinois
Illinois Gallery Website
Enjoy Illinois

The Workings of Canal Locks in the 1830's  

Illustrations are courtesy of Cuyahoga Valley Association

The downstream line boat has dropped only a little below the level of the upper reach of the canal, whose water is held back by the upper gates. The lower gates are closed, but their sluices are open and water pouring through them is dropping the lock's water level to that of the lower reach.

The drawing at the bottom shows one leaf of a lock gate with no water in the lock so as to expose the sluice gate, the wooden floor of the lock, and the mitre sill against which the gates close. The gate is shown partly open. When it is entirely open it stands in the recess of the wall, to give the boat the full width of the lock. There is a smaller recess (hidden) near the bottom to receive the sluice gate if the lock tender forgets and leaves it open when he swings the gate back.

Parks & Recreation

Illinois Dept.of Natural Resources
Office of Land Management
One Natural Resources Way
Springfield, IL 62702
E-mail
Becoming an Outdoors Woman
Interpretive Programs
State Park Magazine
Website Map
FAQ's
Visitor Comment Card
Recreation.gov

Copyrightę 2014 Department of Natural Resources
Accessibility    Contact    FAQs    Podcasts    Privacy    Social Networking