ASCE

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.  

In the 18th century, French architect Claude-Nichols Ledoux was known for forging architectural beauty with industrial efficiency. One hundred years later his vision was given new life through the design of the Louisville Water Company Pumping Station.

In the early 1830s, the merchants of Bristol, long dissatisfied with their communication with London, began to wonder if the new railroad technology might be a solution to their problem. The Bristol Chamber of Commerce, the Merchant Adventurers and other local industrial bodies formed a committee in 1833 to discuss the ambitious proposal of laying a railway to London. Matters progressed swiftly. Money was advanced and the search for a first-class engineer to guide the effort.

Much of the sophisticated system of canals, dams, gates, and tunnels built to manage water power in 19th-century Lowell is preserved today as the basis of the Lowell National Historical Park and the Lowell Heritage State Park. Pictured above is the Boott Penstock, an early channel adjacent to the Boott Mills (right).

Visionary Alexander Hamilton, the United States' first Secretary of the Treasury, visited the Great Falls of the Passaic River with George Washington in 1778. The 77-foot-high, 280-foot-wide waterfall inspired his dream of abundant, inexpensive energy as the means for economic independence from foreign markets.

Four prehistoric reservoirs at Mesa Verde National Park were constructed and used between AD 750 and AD 1180. They are: Morefield Reservoir (in Morefield Canyon), Far View Reservoir (on Chapin Mesa), Sagebrush Reservoir (on an unnamed mesa), and Box Elder Reservoir (in Prater Canyon). These four ancient reservoirs represent extraordinary engineering achievements by the Ancestral Puebloan people. In an arid environment with very little surface water, these prehistoric people found ways to route and capture runoff to create sustainable domestic water supply reservoirs.