When the Society for Establishing Useful Manufactures (S.U.M.) selected the Great Falls of the Passaic River as the site of its proposed manufacturing community in 1792, one of its greatest challenges was figuring out how to transform the Falls’ natural energy into a dependable source of mechanical power.
The man chosen to develop the plan was Pierre Charles L’Enfant, the French-born engineer and designer who had already gained recognition for his work on the plan of Washington, D.C.
L’Enfant’s work at Paterson represented one of the earliest attempts in the United States to deliberately design an industrial community around a controlled waterpower system.
An Industrial Plan for the Great Falls
L’Enfant understood that simply building factories beside the Great Falls would not make the best use of the river.
The enormous energy of the Falls could be captured more effectively by diverting water above the Falls and controlling its descent.
His basic concept was to construct a dam or diversion structure upstream, allowing water to enter an artificial channel. The channel would carry the water toward the proposed manufacturing district.
The water could then be released through controlled drops to operate machinery.
In principle:
Passaic River
↓
Dam / Diversion
↓
Raceway
↓
Waterwheel
↓
Factory Machinery
↓
Tailrace
↓
Passaic River
This was the fundamental idea that became the Paterson raceway system.
The Importance of Elevation
L’Enfant’s plan took advantage of the natural elevation surrounding the Great Falls.
Instead of using the water only once, the system could eventually make use of the difference in elevation between different parts of the industrial district.
Water could enter the system at a high level, pass through a factory’s waterwheel, and then continue toward factories at lower elevations.
This principle eventually produced Paterson’s Upper, Middle and Lower Raceways.
The raceways became an interconnected system rather than simply individual mill canals.
Designing an Industrial Community
L’Enfant’s assignment was broader than designing a canal.
The S.U.M. wanted to create an entire manufacturing community.
The raceway system therefore had to work together with:
- factory locations
- streets
- mill sites
- water-control structures
- residential development
- transportation routes
- public spaces
The result was an early example of industrial planning, in which the location of factories was determined in large part by access to mechanical power.
The raceway became the organizing element of the industrial district.
The First Raceway
Construction of the first raceway began during the 1790s.
The channel diverted water from the Passaic River and carried it toward the first manufacturing facilities.
The early system was relatively simple compared with the extensive network that eventually developed. Nevertheless, it established the basic engineering principle that would guide Paterson’s industrial development for more than a century.
The raceway transformed the Great Falls from a single source of falling water into a distributed power system.
Difficulties and Changes
L’Enfant’s plans proved ambitious.
Construction was difficult, financing was limited, and the S.U.M. encountered significant organizational problems. Some aspects of L’Enfant’s original design were modified as engineers gained experience with the site.
The raceway system that exists today should therefore not be regarded as a structure built entirely according to one original plan.
Instead, it was the result of decades of engineering modifications and expansions.
Later engineers and the S.U.M. repeatedly enlarged, repaired and redesigned the system to meet the needs of expanding industry.
From L’Enfant’s Plan to the Three Raceways
The most important legacy of L’Enfant’s work was the basic concept of using the Passaic River as a controlled industrial power source.
During the nineteenth century, the system developed into three principal levels:
Upper Raceway
The highest raceway carried water from the river toward the upper industrial district. Its elevation provided the greatest available head for waterpower.
Middle Raceway
Water from the upper system could be released into the middle level, where additional factories could utilize its energy.
Lower Raceway
The lowest level carried water to additional industrial sites before returning it to the Passaic River.
This cascading arrangement allowed manufacturers to take advantage of the Falls’ elevation much more efficiently than a single mill beside the river could have done.
The Raceway as Paterson’s Industrial Backbone
L’Enfant’s concept ultimately became the backbone of Paterson’s industrial economy.
As the city developed, factories were constructed along the raceways because proximity to the water meant access to mechanical power.
The system eventually supplied energy to industries that made Paterson nationally famous, including:
- textile manufacturing
- silk production
- locomotive manufacturing
- firearms
- machinery
- wire
- paper
- metalworking
The raceways effectively became Paterson’s first industrial utility network.
A Revolutionary Concept
The significance of L’Enfant’s work extends beyond Paterson.
In the 1790s, the United States was still primarily an agricultural nation. Large-scale industrial cities were largely associated with Europe.
L’Enfant’s plan helped introduce a different concept: designing a community around industrial power.
The Great Falls supplied the energy, but the raceway system made that energy useful to an entire manufacturing district.
This was the beginning of the transformation of Paterson into an industrial city.
L’Enfant’s Legacy
Pierre Charles L’Enfant is best remembered for his association with the planning of Washington, D.C., but his work at Paterson represents another important chapter in his engineering career.
His raceway concept established the basic relationship between the Passaic River, the Great Falls and the industrial district.
Although the system was subsequently altered and expanded, the fundamental principle survived:
Control the water, distribute its energy, and use the natural fall of the river to power an industrial city.
More than two centuries later, the surviving raceways remain tangible evidence of that early experiment.
They are not simply old canals.
They are the remnants of the power system that helped build Paterson.