Hartford Electric Light Company
| Company type | Private |
|---|---|
| Industry | Electric utility |
| Founded | 1881 |
| Founder | Austin Cornelius Dunham |
| Defunct | 1958 (merged) |
| Fate | Merged with Connecticut Power Company; later became part of Northeast Utilities |
| Headquarters | Hartford, Connecticut , United States |
| Products | Electric power generation and distribution |
The Hartford Electric Light Company (HELCO), based on Pearl Street in Hartford, Connecticut, served as a prominent regional electricity provider. In 1958, HELCO merged with the Connecticut Power Company, and later in 1966, these organizations joined forces with Connecticut Light and Power Company (CL&P) and Western Massachusetts Electric Company (WMECO) to establish Northeast Utilities (NU), thereby broadening their influence throughout New England. The original HELCO headquarters stands within the Ann Street Historic District.
History
HELCO’s beginnings are linked to the Hartford Steam Company, which constructed the initial brick building in 1880 housing steam boilers that supplied customers. In 1881, this steam company introduced Hartford’s inaugural electric generator, marking its foray into electricity services. That same year, HELCO was incorporated to assume electrical operations from the steam company, initiating its focus on electric power generation and distribution.
Led by its founder and first president, Austin Cornelius Dunham, HELCO commenced activities at the steam-driven Pearl Street plant in 1882. At that period, Hartford featured approximately one thousand gaslights across 80 miles of roadways. Early initiatives included electrifying the Asylum Street railroad station in 1883 and establishing Hartford as the first U.S. municipality with a fully electric street lighting system—highlighting HELCO’s pioneering role in urban electrification.
A significant milestone was the installation of America’s first steam turbine dedicated to power generation within a public utility at Pearl Street in 1901—a Westinghouse-Parsons turbine known as “Mary-Ann.” This cutting-edge equipment improved HELCO’s operational efficiency and industry standing. The company further diversified by adding hydroelectric plants such as Oil City and Tariffville, strengthening its energy assets and supporting ongoing expansion.
Dutch Point
After Hartford Light and Power Company, a rival of HELCO, acquired the steam company, HELCO vacated its premises by 1887. Subsequently, HELCO purchased Hartford Light and Power in 1896 and resumed operations at Pearl Street. The company operated America’s first public utility steam turbine generator, Mary-Ann, installed at Pearl Street in 1901. This facility also supplied power to Hartford’s streetcar system until it transitioned to a substation role in 1905 when HELCO’s Dutch Point plant became fully operational.
The Dutch Point area of Hartford—named for the 1614 Dutch expedition led by Adrian Block—became home to this new plant starting in 1905, which supplanted the original Pearl Street site as the city’s main electricity source.
Tariffville Powerhouse
In 1899, HELCO constructed a dam and generating station on the Farmington River near Tariffville, close to Simsbury, Connecticut. The powerhouse contained two pairs of water wheels rated at 1300 horsepower each, connected to two Westinghouse generators producing 700 kilowatts apiece. This facility was notable for deploying the first transmission line utilizing aluminum conductors. Both the dam and powerhouse were destroyed by flooding caused by two hurricanes in August 1955.
Connecticut Power Company
Established in 1899 under the name Marine Power Company, the Connecticut Power Company managed two hydroelectric stations situated on the Farmington River, approximately twelve miles from Hartford. These facilities, combined with HELCO’s plants (#1 and #2), provided electricity controlled from the primary plant to serve Hartford’s market.
In 1915, Connecticut Power and HELCO entered into a power exchange arrangement to optimize service delivery to each other's customers. HELCO further expanded its infrastructure by commissioning the South Meadows power station in Hartford in 1921.
HELCO’s customer count increased dramatically from just over three thousand in 1900 to nearly ninety thousand by 1950, covering Hartford and an area of about 250 square miles. In 1958, HELCO merged with Connecticut Power Company; subsequently, both entities combined with Connecticut Light and Power Company (CL&P) and Western Massachusetts Electric Company (WMECO) in 1966 to create Northeast Utilities (NU), thereby consolidating their market presence and broadening regional operations.
Innovations
HELCO was a pioneer as the first U.S. company to implement a steam turbine for public power generation, installing the "Mary-Ann" turbine generator in 1901. This Westinghouse–Parsons model turbine had a capacity of 1500 kilowatts and was located at HELCO's generating station at 266 Pearl Street in Hartford.
The company introduced several groundbreaking advancements that influenced the electrical sector. In 1893, HELCO became the first American electric utility to transmit three-phase alternating current at high voltage over a considerable distance—from its Rainbow Hydroelectric Station in Windsor to Hartford, spanning eight miles. Additionally, they were innovators in combining storage batteries with hydroelectric power generation, which allowed energy to be stored during periods of low demand and dispatched during peak usage times.
HELCO’s president also developed and commercialized various electrical appliances, including an electric range featuring broiler, cooker, and roaster capabilities, with approximately 20,000 units installed in Hartford residences. He held patents for an electric radiator designed for water heating as well as an ice-making machine. By 1915, these appliances had become widespread in homes throughout Hartford.
Ann Street Historic District
The original HELCO facility at 266 Pearl Street is included within the Ann Street Historic District and currently functions as the headquarters for Connecticut Light & Power Company.
Sources
External links
- Articles with short description
- Energy in New England
- Electric power companies of the United States
- American companies established in 1881
- Companies based in Hartford, Connecticut
- Hydroelectric power companies of the United States
- 1881 establishments in Connecticut
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- Companies of the United States by year of establishment