Spire STL Pipeline - Landing - Hero
Spire STL Pipeline
UPDATE: Spire STL Pipeline receives permanent certificate

The STL Pipeline is a 65-mile interstate pipeline connected to the Rockies Express Pipeline in Illinois and various points east in Missouri, including to Spire Missouri, the MoGas Pipeline and the Enable MRT Pipeline.

STL Pipeline ensures reliable and affordable gas supply diversity both year-round and particularly when St. Louis needs it most—in the heart of the winter.

By interconnecting with the Rockies Express Pipeline, STL Pipeline provides St. Louis direct access to one of the most prolific supply basins in America—the Appalachian Basins—as well as the Rocky Mountains producing region. This connection ensures that natural gas customers have abundant and reliable domestic supplies of gas to warm their homes, heat their water, cook their meals and fuel industry and businesses throughout the region.

The STL Pipeline project was approved by the Federal Energy Regulatory Commission (FERC) in 2018 after a thorough and rigorous regulatory review and was designed and constructed to uphold Spire’s commitment to the environment and communities. On December 15, 2022, the Federal Energy Regulatory Commission (FERC) reissued a permanent Certificate of Public Convenience and Necessity for the Spire STL Pipeline, ensuring continued operation of the natural gas pipeline which delivers a critical source of energy for more than 650,000 homes and businesses in eastern Missouri. 

For more information concerning available capacity on STL Pipeline, please contact a Spire representative.

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A thorough and rigorous regulatory process
2022 update

On December 15, 2022, the Federal Energy Regulatory Commission (FERC) reissued a permanent Certificate of Public Convenience and Necessity for the Spire STL Pipeline, ensuring continued operation of the natural gas pipeline which delivers a critical source of energy for more than 650,000 homes and businesses in eastern Missouri. Read the news release >

A look at the process

The STL Pipeline project was approved by the Federal Energy Regulatory Commission (FERC) in 2018 after a thorough and rigorous regulatory review and was designed and constructed to uphold Spire's commitment to the environment and communities.

STL Pipeline partnered with a reputable environmental firm to carefully study the pipeline route and identify any ecological and archeological concerns.

During construction, STL Pipeline strived to work side by side with landowners to minimize the impact resulting from the construction and operation of the pipeline.

The pipeline route was adjusted to ensure requirements were met to protect the environment and a number of steps were taken to minimize environmental impact, including installing erosion-prevention devices and using low-impact horizontal drilling to avoid disturbing sensitive areas.

Full restoration with the least environmental impact takes time.

Restoration activities will continue until the pipeline right-of-way sees regrowth matching its surrounding area. And even after full restoration is complete, STL Pipeline will continue to monitor and address any environmental or operational concerns with the pipeline, consistent with FERC rules and policy.

Spire STL Pipeline is committed to:

  • Continuing to monitor restoration efforts and performing additional remediation, where necessary, along the entire 65-mile route. As part of this process, we have closely adhered to the National Environmental Policy Act (NEPA), the environmental conditions in FERC's Certificate Order, and the environmental requirements of other state and local regulatory agencies.
  • Maintaining a strong relationship with landowners and continuing to work to reach a fair agreement for land easements and resolve any remaining landowner restoration concerns as quickly and as reasonably as possible.
  • Supporting the communities where we work--which includes Scott, Greene and Jersey counties in Illinois and St. Charles and St. Louis counties in Missouri--the communities along the STL Pipeline's route.
A positive development

On October 7, 2022, the Federal Energy Regulatory Commission Staff released their final Environmental Impact Study (EIS) on Spire STL Pipeline, finding the project's environmental impact "less than significant."

Read FERC's news release >

A message from STL Pipeline President Scott Smith

Hear more about the pipeline and how it serves eastern Missouri customers

Explore frequently asked questions about the STL Pipeline
Why did Spire build the pipeline?

In 2015, Spire Missouri (the gas utility serving the St. Louis region) identified a critical need to address infrastructure resiliency and explore new supply options to meet customer needs in the Greater St. Louis region.

Natural gas is known for its reliability—no matter the weather. And so much of that reliability is thanks to a vast pipeline infrastructure.

Previously, Spire Missouri was heavily dependent on a single pipeline to serve the St. Louis region. That pipeline ran through the New Madrid fault zone, an area with the potential for severe and unpredictable earthquakes. Additionally, some of that pipeline’s energy source comes from Texas, which can face severe weather that can adversely impact the availability and cost of supply. 

At the same time, the natural gas supply landscape had changed dramatically with the development of natural gas resources in the Appalachian Basin. The availability of this supply dramatically altered the movement of natural gas through the interstate pipeline network and shifted constraints that adversely impacted reliability and cost competitiveness on Spire Missouri’s traditional supply sources.

Spire Missouri entered into discussions with several pipeline developers about a potential project to ensure continued delivery of reliable gas supply to the greater St. Louis region. When none of the project proposals met all of the needs for the region, Spire STL Pipeline was developed to fill the need through its 65-mile interstate pipeline that brings natural gas from the 1,700-mile Rockies Express (also known as, REX) Pipeline which spans eight states. 

By interconnecting with REX, With STL Pipeline’s interconnection to REX, the Greater St. Louis region is no longer singularly dependent on the Texas gas producing basins – which, after Winter Storm Uri, has shown to be less reliable.  Instead, STL Pipeline (through its interconnection with REX) provides a more diverse energy supply to the St. Louis region by directly accessing the Appalachian Basin as well as the Rocky Mountains producing region, ensuring that natural gas customers have abundant and reliable domestic supplies.

The energy supply diversity created by STL Pipeline allows Spire Missouri to take advantage of the most competitively-priced supply of natural gas from multiple producing regions. 

When did the Spire STL Pipeline go into service?

Following two years of thorough and rigorous regulatory review, the FERC approved a Certificate of Public Convenience and Necessity in 2018 authorizing the construction and operation of the Spire STL Pipeline. After approximately one year of construction, the Spire STL Pipeline began operations in November 2019. 

How does Spire restore land along the pipeline?

We continue to be proud of the work we’ve done to restore land along the Spire STL Pipeline right of way following construction of the project. As noted by independent reports filed by FERC staff after conducting in-person site visits, nearly all of the land along the right of way is restored with revegetation comparable to pre-construction conditions.
Nearly 90% of the landowners who reside along the Pipeline right of way have reached voluntary land rights agreements with Spire STL Pipeline in resolving outstanding restoration concerns. The vast majority of landowners with remaining concerns have refused Spire STL Pipeline access to critical areas of land necessary to perform restoration effectively and safely. However, only in the last few weeks, have these landowners reversed their decision and are now allowing access. Unfortunately, granting access now — in the middle of winter weather conditions — will mean that Spire STL Pipeline will not be able to perform the planned restoration until spring.
Spire STL Pipeline remains committed to fulfilling all of the FERC’s restoration requirements. We will follow the FERC’s decision and continue to work in good faith by being proactive and transparent in resolving outstanding restoration concerns.