Who gains from saving nature
Ledger 1 : 33 — For each dollar financing nature-based solutions in 2023, about $33 financed activities harmful to nature. (UNEP)
Cases / Oil spill · United States · 2015–2025

Refugio / Plains Line 901 oil spill (California)

Nature's voice · report
2,934 barrels of oil entered my waters.
Total released, Santa Barbara County.
Did nature suffer? Yes. Harm is on record.
What the record lacks: 4 none on record · 1 disputed · 1 unclear See the gaps

A Plains All American pipeline released 2,934 barrels of oil in Santa Barbara County, California, in May 2015, 598 of them into the Pacific. Plains reported total costs of $870 million and lost an insurance arbitration in January 2025 over a $230 million class action settlement.

$870m vs about $280mTotal costs reported by Plains vs collected from insurers
As reported in Plains’ filings; a further $225m insurance receivable was written off in Q4 2024.

Status As of January 2025 (reported in Plains’ FY2024 Form 10-K): the insurance arbitration was lost and the $225 million receivable written off; no later ruling found.

What?
A Plains pipeline released 2,934 barrels of oil, 598 of them into the Pacific; Plains reported total costs of $870 million and lost an arbitration against its insurers over a $230 million class action settlement. Plains All American Pipeline / SEC
Where?
Santa Barbara County, California (Refugio), United States. Plains All American Pipeline / SEC
When?
Release in May 2015; settlement paid October 2022; arbitration March 2023 to January 2025. Plains All American Pipeline / SEC
Who?
Gained
  • Insurers holding the remaining cover — The $175 million claim against them failed in arbitration in January 2025, per Plains’ disclosure. Plains All American Pipeline / SEC
Lost
  • Plains All American Pipeline — Reported total costs of $870 million, collected about $280 million from insurers, and wrote off a $225 million insurance receivable. Plains All American Pipeline / SEC
Harmed
  • Pacific coast and ocean at Santa Barbara County — 598 barrels of oil entered the Pacific; natural resource damages of $22.3 million were recorded. Plains All American Pipeline / SEC
Why?
Insurers said the settlement damages were not covered and earlier payments did not properly exhaust the underlying policies. The cause of the release is not stated in the sources reviewed. Plains All American Pipeline / SEC
How?
Plains paid the class action settlement itself, claimed it from insurers, and lost the coverage arbitration, after which it wrote off the receivable. Plains All American Pipeline / SEC
6 of 6 questions answered from the record

What happened

The record, in order.

In May 2015 the Line 901 pipeline of Plains All American Pipeline released 2,934 barrels of oil in Santa Barbara County, California. Of these, 598 barrels entered the Pacific Ocean.

Plains reported total costs of $870 million. Its 2015 insurance programme had a limit of $500 million, and Plains collected about $280 million, of which $275 million came from that programme.

A class action settlement of $230 million was paid in October 2022. Plains claimed it from its insurers in November 2022. In the fourth quarter of 2022, insurers responsible for the majority of the remaining cover “formally communicated a denial of coverage”. According to Plains’ filings, the insurers said the settlement damages were “not covered” and that earlier payments did not “properly exhaust the underlying policies”. The SEC questioned the receivable in May 2023.

Plains began arbitration against the insurers in March 2023, and the hearing ended in October 2024. Plains wrote off the full $225 million insurance receivable in the fourth quarter of 2024. In January 2025 the panel ruled that, in Plains’ words, “a substantial portion of our claims. were not covered under the applicable policy”. The $175 million claim failed, and the remaining $50 million against other insurers was judged “less than probable”.

Plains’ regulatory filings also list criminal fines of $3.35 million, a civil penalty of $24 million under a consent decree and natural resource damages of $22.3 million.

  1. 2015May: Line 901 releases 2,934 barrels in Santa Barbara County, 598 barrels into the Pacific; $500 million insurance programme in place
  2. 2022October: $230 million class action settlement paid; November: Plains claims it from insurers; Q4: insurers formally deny coverage
  3. 2023March: Plains begins arbitration; May: SEC questions the receivable
  4. 2024October: arbitration hearing ends; Q4: Plains writes off the $225 million receivable
  5. 2025January: panel rules a substantial portion of Plains’ claims were not covered; $175 million claim fails

What was said

Claims, in the words of those who made them.

“formally communicated a denial of coverage”

Plains All American Pipeline, describing the insurers responsible for the majority of remaining cover · Q4 2022, as disclosed in Plains’ filings · Plains All American Pipeline / SEC

“not covered”

“properly exhaust the underlying policies”

“a substantial portion of our claims. were not covered under the applicable policy”

“less than probable”

Where accounts differ

Each party's account, side by side, with its source. The record does not settle these points; it shows them.

Was the $230 million class action settlement covered by Plains’ insurance?
Company or project
Plains All American Pipeline

Claimed the settlement from its insurers in November 2022 and arbitrated from March 2023; a $175 million claim and about $50 million more against other insurers were at issue.

Plains All American Pipeline / SEC
Company or project
Insurers (as described in Plains’ filings)

The settlement damages were “not covered” and earlier payments did not “properly exhaust the underlying policies”.

Plains All American Pipeline / SEC
Courts
Arbitration panel (as described by Plains)

In January 2025, “a substantial portion of our claims. were not covered under the applicable policy”; the $175 million claim failed.

Plains All American Pipeline / SEC

How it looked

What was shown, beside what was recorded.

Shown

  • Total costs of the incident of $870 million, of which about $280 million was collected from insurers.
    Plains All American Pipeline, FY2024 Form 10-K · Plains All American Pipeline / SEC
  • A $225 million write-off of the insurance receivable in the fourth quarter of 2024.
    Plains All American Pipeline, FY2024 reporting · Plains All American Pipeline / SEC

Recorded

Who gained

Money that reached nature, beside money that stayed elsewhere.

Reached nature or the ground

$22m
Only the natural resource damages figure is itemised; the $870 million total cost is not broken down in the sources reviewed.
Natural resource damages (Plains XBRL data)$22m
Payee and payment date are not stated in the sources reviewed.

Gained elsewhere

$257m
Sum of the three itemised payments; remaining parts of the $870 million total are not itemised.
Class action settlement, paid October 2022$230m
Criminal fines$3.35m
Civil penalty under consent decree$24m
Reached the ground
$22m
Gained elsewhere
$257m
Currency: USD · Window: 2015–2025. All figures cover the same period. * Estimate built from cited figures.

Responses on record

  • Plains All American Pipeline (FY2024 Form 10-K): Wrote off the full $225 million insurance receivable in Q4 2024 and said a substantial portion of its claims were not covered under the applicable policy. · Plains All American Pipeline / SEC
  • Insurers under Plains’ programme (not named in the sources reviewed) (2022–2025): Said the settlement damages were not covered and that earlier payments did not properly exhaust the underlying policies, as described in Plains’ filings. No direct statement from the insurers was found. · Plains All American Pipeline / SEC

In court and with insurers

Every proceeding and every insurer decision on record.

Lawsuits and rulings

  1. 2022-10Settled$230m $230 million, paid October 2022
    Class action settlement over the Line 901 release
    Not stated in the sources reviewed · Class action · Plaintiff class (not described in the sources reviewed) → Plains All American Pipeline

    Plains paid a $230 million class action settlement in October 2022 and then claimed it from its insurers. Plains All American Pipeline / SEC

  2. 2023-03–2025-01Defendant won$175m $175 million claim failed; about $50 million further claim against other insurers judged “less than probable”
    Plains v. insurers: arbitration over coverage of the settlement
    Arbitration panel · Arbitration · Plains All American Pipeline → Insurers holding the remaining cover (not named in the sources reviewed)

    The hearing ended in October 2024. Plains wrote off the full $225 million receivable in Q4 2024. In January 2025 the panel ruled, in Plains’ words, that a substantial portion of its claims were not covered under the applicable policy. Plains All American Pipeline / SEC

  3. Outcome not on record$3.35m criminal fines (millions of dollars)
    Criminal case over the Line 901 release
    Not stated in the sources reviewed · Criminal · Not stated in the sources reviewed → Plains (entity not specified)

    Criminal fines of $3.35 million are recorded in Plains' XBRL data. The charging authority, court and charges are not stated in the sources reviewed. Plains All American Pipeline / SEC

  4. Settled$24m civil penalty (millions of dollars)
    Consent decree over the Line 901 release
    Not stated in the sources reviewed · Civil · Not stated in the sources reviewed → Plains (entity not specified)

    A civil penalty of $24 million under a consent decree is recorded in Plains' XBRL data. The parties, court and dates are not stated in the sources reviewed. Plains All American Pipeline / SEC

Insurers

  1. 2015Partly paid$280m about $280 million collected, of which $275 million from the $500 million programme
    Insurers under the 2015 programme (not named in the sources reviewed) → Plains All American Pipeline

    The 2015 programme had a limit of $500 million; Plains collected about $275–280 million. Plains All American Pipeline / SEC

  2. 2022Claim refused$225m $225 million receivable written off in Q4 2024
    Insurers responsible for the majority of the remaining cover (not named in the sources reviewed) → Plains All American Pipeline
    Stated reason: The insurers said the settlement damages were “not covered” and that earlier payments did not “properly exhaust the underlying policies”.

    Insurers formally communicated a denial of coverage in Q4 2022. Plains arbitrated from March 2023 and lost in January 2025: the $175 million claim failed and the remaining $50 million against other insurers was judged “less than probable”. Plains All American Pipeline / SEC

What nature saw

Outcomes measured on the ground, and nature's note.

Nature's report opens this page. Below: further outcomes measured on the ground.

Oil released
2,934 bbl
Santa Barbara County, May 2015
Oil entering the Pacific
598 bbl
Part of the 2,934 barrels released
Natural resource damages
$22.3m
Plains XBRL data; part of $870m total costs reported

What we don't know

Undisclosed, unproven, untried: recorded as data.
Court ruling exists

Court

  • Unclear Criminal case over the Line 901 release: outcome not on record.

Accounts

  • Disputed Was the $230 million class action settlement covered by Plains’ insurance?

Record

  • None on record Insurers’ stated grounds and the panel’s reasoning: not found beyond the passages Plains quoted in its filings.
  • None on record Forum, claimants and date of the class action; forum and parties of the criminal fines, consent decree and natural resource damages: not stated in the sources reviewed.
  • None on record The arbitration panel's own reasoning was not found; the outcome is known only through Plains' filings.
  • None on record The cause of the Line 901 release is not stated in the sources reviewed.

Did the harm stop?

The record shows the volume released (2,934 barrels, 598 into the Pacific) and payments, not the state of the coast after cleanup.

Who paid?

Plains reported total costs of $870 million, of which about $280 million was collected from insurers and $225 million of further insurance claims was written off after the January 2025 arbitration ruling.

Sources

Voices on record: ✓ Company or project— Government and regulators— Courts— Press and investigations— Communities and civil society— Researchers

Company or project

  1. Plains All American Pipeline, Form 10-K for fiscal year 2024
    Plains All American Pipeline / SEC · 2025
  2. Plains All American Pipeline, Exhibit 99.1 (SEC filing)
    Plains All American Pipeline / SEC · 2025-02

Connected cases

Related matters, and cases linked to this one through the same organisations, with the role each played in both.
Terms used on this page

Law and courts

Arbitration
A private dispute process in which an appointed arbitrator, instead of a court, decides the case.
Class action
A single lawsuit brought on behalf of a large group of people with similar claims.
Consent decree
A settlement with a government that a court approves and that has the force of a court order.
Natural Resource Damage Assessment (NRDA)
The US legal process in which government trustees measure harm to natural resources from a spill and claim the cost of restoring them.

Institutions

SEC
The US Securities and Exchange Commission, which regulates securities markets and what companies tell investors.
Similar cases
Oil spill · Pipeline · United States · 2010–2017
Enbridge Line 6B oil spill, Marshall, Michigan
Same type: Oil spill, PipelineSame countryCourt: outcome not on record, lost by claimant, settled
Oil spill · Tanker / shipping · Insurance, liability and compensation funds · India · 2011–2016
MV Rak Carrier coal and oil spill (Mumbai)
Same type: Oil spill, Insurance, liability and compensation fundsCourt: outcome not on recordInsurer refused to pay
Insurance, liability and compensation funds · Oil spill · Canada · 2012–2026
Lac-Mégantic rail disaster (Quebec)
Same type: Insurance, liability and compensation funds, Oil spillSame regionCourt: lost by claimant, settled
Oil spill · Tanker / shipping · Insurance declined or withdrawn · United States · 1989–2015
Exxon Valdez: the spill, insurance and court cases
Same type: Oil spillSame countryCourt: settled, lost by claimant
Insurance, liability and compensation funds · Chemical pollution · Insurance declined or withdrawn · United States · 1929–1993
Ventron/Morton mercury, Berry's Creek
Same type: Insurance, liability and compensation fundsSame countryCourt: outcome not on record, lost by claimant
Insurance, liability and compensation funds · Chemical pollution · United States · 2017–2021
Duke Energy coal ash insurance dispute
Same type: Insurance, liability and compensation fundsSame countryCourt: settled, outcome not on record