By Jared Ebersole in Video 27 Sep 2026

Pier 98: Where Manhattan’s Heat Meets the Hudson

A former fuel dock connects New York’s subway history to its steam system and a continuing debate over the river’s industrial role.

The pipes at Pier 98 tell a story that stretches from the first New York subway to the temperature of the Hudson River. Here, the waterfront remains part of Manhattan’s energy machinery: a place where equipment sheds heat and water from industrial operations returns to the river.

That exchange drew public scrutiny in 2022, when critics challenged Con Edison’s use of the pier and raised concerns about its environmental effects. The underlying question is easy to understand, even if the plumbing takes some untangling: how should a river used to support the city’s infrastructure also be protected as habitat?

The dispute has a longer history, and a more complicated regulatory record, than the image of hot water pouring from a pipe might suggest. Hudson River Park’s September 2022 board records document both a threatened citizen lawsuit and the state’s confirmation that Con Edison held a valid discharge permit. Hudson River Park Trust meeting minutes

Where it is

Pier 98, on the Hudson River waterfront at West 58th Street, Manhattan. The associated historic IRT Powerhouse stands at 855–869 Eleventh Avenue, between West 58th and West 59th Streets.

The powerhouse opened on October 27, 1904, alongside the original IRT subway. Its waterfront location supplied a practical advantage: coal could arrive by barge, and ash could leave by water. A specially constructed, 700-foot pier connected that river traffic to the plant’s fuel-handling machinery.

The building gave this industrial operation an unusually grand public face. Stanford White designed its exterior, wrapping the engineering in granite, Roman brick and terra cotta. The Landmarks Preservation Commission describes it as the largest generating station constructed up to that time. Here was an essential subway component that passengers could encounter above ground, expressed at the scale of a civic monument.

Con Edison acquired the powerhouse in 1959. Its subsequent adaptation for the city’s energy system gave the enormous building a working life beyond its original subway assignment. The commission designated it a landmark in December 2017, recognizing an architectural achievement that remained active infrastructure. IRT Powerhouse designation report

The modern waterfront connection involves two facilities: the 59th Street steam station and the 49th Street electrical substation. In testimony submitted in April 2023, West Side elected officials described the steam station’s use of natural gas and its role in supplying Manhattan’s heating, hot-water and air-conditioning needs. The old relationship between river and city had survived a change in fuel and purpose. West Side elected officials’ testimony

Understanding the pipes requires separating two water systems. Con Edison says the steam station uses city water to produce steam, while Hudson River water cools equipment associated with the 49th Street substation. River water is therefore not simply pumped into the steam boilers and sent onward to buildings. The company’s public explanation also describes proposed reverse-osmosis equipment to remove additional minerals from city water, plus wastewater neutralization treatment. Con Edison’s wastewater explanation

The state’s March 2023 draft permit makes that separation concrete. It identifies one discharge containing boiler drains and other wastewater streams, and another carrying non-contact cooling water from a heat exchanger. In a heat exchanger, heat passes between separate water circuits. The river water carries away thermal energy without needing to become part of the equipment’s internal cooling circuit.

This distinction matters because the two discharges pose different questions. Boiler-related wastewater calls for attention to water chemistry and treatment. Cooling water makes temperature central. Calling everything beneath the pier “hot wastewater” obscures the machinery and the controls needed to assess it. New York State DEC draft permit and fact sheet

Temperature can affect habitat even when water looks clear. Fish and other aquatic organisms depend on oxygen dissolved in the water around them. Warmer water can hold less dissolved oxygen than colder water, leaving less capacity to support aquatic life under otherwise comparable conditions. That is the basic mechanism behind concerns about thermal discharges. USGS explanation of dissolved oxygen

But the mechanism alone does not establish that a particular pipe is suffocating fish. Oxygen conditions also reflect photosynthesis, exchange with the atmosphere and other processes. To understand an outfall’s actual consequences, measurements must connect the discharge to conditions in the receiving water. A photograph of a pipe cannot reveal those relationships, and a temperature limit cannot substitute for evidence of what happens around it.

The 2023 draft permit listed a daily maximum of 104 degrees Fahrenheit for the non-contact cooling-water discharge. That figure describes a proposed limit at a particular outfall, not a finding that the Hudson reaches that temperature, or that the discharge constantly operates there. DEC draft permit

Elected officials nevertheless asked DEC to examine the limit closely. Their April 2023 testimony distinguished the 104-degree discharge figure from a 90-degree surface-water limit for estuaries, noting that the outfalls sit below the surface. They also urged consideration of further cooling before release and a restriction on the number of days thermal discharges could occur. Those were requests for stronger protection, not evidence that such restrictions had already been adopted. West Side testimony

The legal controversy needs the same care with dates and attribution. In September 2022, the Hudson River Park Trust acknowledged a 60-day notice of intent to bring a Clean Water Act citizen suit from park advocate Tom Fox and the City Club. In the same record, the Trust reported that DEC had confirmed the existing permit’s validity while reviewing a new application. A threatened lawsuit was not a court ruling that the pier operated illegally. Trust meeting record

Con Edison says it tests wastewater for pH and suspended solids and returns cooling water within state-prescribed temperature limits. Those statements describe the utility’s position; they do not erase the public debate about whether existing protections are sufficient. Con Edison’s permit information

Pier 98 makes that debate unusually tangible. The powerhouse’s ornate walls preserve the ambition of an earlier energy system. The waterfront pipes reveal the physical exchanges that keep its successor working. Looking at them together means seeing the Hudson as part of the city’s machinery and as a living environment whose condition must be measured, explained and protected.