A bipartisan group of senators, led by Jeff Merkley (D-OR) and Lisa Murkowski (R-AK), sent a formal letter to the National Science Foundation on June 15, 2026, demanding it stop plans to dismantle the Ocean Observatories Initiative — a $386 million integrated ocean monitoring network that has been operating as a cornerstone of U.S. oceanographic research infrastructure, according to AP News.

The OOI is an instrumented suite of fixed and mobile platforms — including seafloor nodes, moored buoys, and robotic gliders — designed to deliver sustained, high-resolution measurements of physical, chemical, biological, and geological ocean processes. Its Regional Cabled Array off the Pacific Northwest, the Coastal and Global Scale Nodes, and associated autonomous vehicle fleets collectively generate continuous data streams that underpin everything from climate modeling to seismic hazard assessment. NSF awarded the original facility contract — worth $220 million — to a Woods Hole-led coalition, per a 2023 NSF announcement. Operations and maintenance costs for FY 2025 were budgeted at $47.76 million annually.

The immediate trigger for the congressional intervention is an NSF plan, proceeding under the Trump administration's broader science funding reductions, to decommission OOI assets. An early concrete sign: a buoy moored at 80 meters depth — part of the network's coastal observing capacity — is scheduled for removal under those cuts, as reported on June 2, 2026. The senators' letter is a direct response to that trajectory.

Why the Stakes Run High

The OOI is not straightforwardly replaceable. Ocean observing infrastructure of this scale requires years of engineering, calibration, and community data-integration work before it yields scientifically usable records. Gaps in long-running time series are not simply patched retroactively — they are permanent. The network's Regional Cabled Array was also the backbone chosen for the Cascadia Offshore Subduction Zone Observatory (COSZO), a Mid-scale Research Infrastructure-1 award announced by NSF in September 2023, which is designed to advance understanding of subduction dynamics along one of North America's highest seismic-risk zones. Shuttering the cabled array does not simply end ocean chemistry monitoring; it cuts into the real-time seismic and geodetic sensing that informs Cascadia earthquake and tsunami preparedness.

The Facility Board that oversees OOI governance had been funded at $700,000 per year for five years — $3.5 million total — under a solicitation published in March 2024, underscoring that as recently as early 2024, NSF's formal posture was one of sustained operation, not wind-down. The FY 2026 presidential budget request also listed OOI operations among funded lines, alongside the Sub-seafloor Sampling program and the Green Bank Observatory.

Congressional Leverage and Institutional Friction

The bipartisan composition of the Senate push matters. Murkowski's involvement is not purely scientific advocacy — she chairs the Senate Appropriations Committee's Interior, Environment, and Related Agencies subcommittee and has direct jurisdiction over research spending lines. Merkley, ranking Democrat on the Senate Environment and Public Works Committee, brings the left flank. Together, they carry real procedural leverage over NSF's budget execution, not merely rhetorical weight.

What the senators can actually compel is a different question. Congressional directives to agencies are enforceable through appropriations riders and reprogramming restrictions, but NSF's operating latitude within an already-enacted budget is considerable. If the FY 2026 funding lines do not include specific ring-fencing language for OOI assets, the agency retains discretion over how to allocate operations funds — and the Trump administration has shown consistent willingness to test those boundaries across science agencies.

The broader pattern here is one of structural tension between multi-decade research infrastructure investments and annual budget cycles subject to political reorientation. The OOI was never a cheap program — its operations cost alone exceeds the entire annual budget of many smaller federal science directorates — and that scale makes it both invaluable to the science community and a visible target when agencies are instructed to cut. The real question going forward is whether Congress moves fast enough to attach protective language before NSF proceeds with additional decommissioning steps. The removal of even one major mooring represents lost time-series continuity measured not in months, but in the decades it took to establish baseline records in the first place.