On this site in 1837 John Deere built the first successful self-scouring steel plow, thereby making a significant contribution to the development of American agriculture. Dedicated by American Society of Agricultural Engineers 1976
1837
YearAdded:
Image Credit:
Courtesy Flickr/Dwight Sipler (CC BY 2.0)
Image Caption:
moldboards of a modern plow
Era_date_from:
1976
The 50-mile Houston Ship Channel is a manmade port for ocean-going vessels, stretching from the Gulf of Mexico to Houston and Harris County, Texas.
YearAdded:
Image Credit:
Courtesy Flickr/Roy Luck (CC BY 2.0)
Image Caption:
Houston Ship Channel
Era_date_from:
1837
1987
Most of the locks were 184 feet long and 36 feet wide, able to handle boats up to 160 feet long. The sandstone locks (along with wood miter gates, rock-filled timber-crib dams and bypass canals with guard gates) created a slackwater navigation system stretching over 90 miles.
YearAdded:
Image Credit:
Courtesy Flickr/gb_packards (CC BY-ND 2.0)
Image Caption:
Muskingum River Lock
Era_date_from:
1837
2000