▸ Reference

Sources

Every number on fenceline.io is drawn from primary research. The sources below back the claims on the “What a leak costs” panel — each one links out to the original study, regulation, or incident report.

01Detection gap — 78% / 21%

The claim: “78% of hazardous liquid pipeline leaks evade SCADA and CPM. 21% are found by the public.”

  • Leak Detection Study — Final Report No. 12-173
    Kiefner & Associates for PHMSA · December 2012

    The authoritative method-level breakdown. Analyzed hazardous liquid right-of-way incidents January 2010 – July 2012 and found that CPM systems identified only ~20% of leaks and SCADA systems only ~28%. Of 264 incidents where a CPM system was operational at the time of failure, CPM detected the leak just 19% of the time. Roughly 21% of leaks were discovered by the public — neighbors who noticed a sheen, smelled hydrocarbons, or observed dead vegetation.

  • Project 859 — Leak Detection Technology Study
    PHMSA Office of Pipeline Safety R&D

    PHMSA's own R&D project summary citing the Kiefner findings. A useful cross-reference from PHMSA's research portal if the full Kiefner PDF is slow to load.

02Cost per hour — $6,800

The claim: “A moderate undetected crude oil leak on a Texas gathering line costs roughly $6,800 per hour.”

Formula
C(hr) = Q × (P + R) + F ÷ 24
Q = 5 bbl/hr · P = $70/bbl · R = $1,000/bbl · F = $35,000/day
= $350 product + $5,000 remediation + $1,458 penalty = $6,808/hr
  • Valuation of Crude Oil Spills in Transportation Incidents
    PHMSA / U.S. DOT · April 2023

    Analysis of 3,734 onshore crude oil incidents from 2005–2022 with $4.56 billion in total costs. The authoritative cost-per-barrel dataset. Median total cost for pipeline spills ≥ 1 barrel: $3,444/barrel. The $1,000/bbl remediation default used in the ticker is deliberately below this median — the full PHMSA median would push the ticker to roughly $19,000/hr.

  • Liquid Pipeline Leak Rate Estimation Study
    PHMSA / Pipeline Research Council International

    Documents that pinholes account for 54% of all hazardous liquid pipeline releases — and that these leaks typically fall below the 1–5% of throughput threshold that CPM systems can detect. This is why the 5 bbl/hr default in the ticker represents the most common real-world leak mode, not an edge case.

  • Texas Natural Resources Code §81.0531
    Texas Legislature · RRC penalty authority

    Establishes Railroad Commission of Texas penalty authority: up to $10,000/day per oil & gas violation, or $200,000/day for pipeline safety violations (with $2M maximum per series). Each day of a continuing violation counts as a separate violation. Used for the RRC component of the $35,000/day penalty exposure in the ticker.

  • Texas Water Code §7.052
    Texas Legislature · TCEQ penalty authority

    Establishes Texas Commission on Environmental Quality penalty authority: up to $25,000/day per violation (up to $40,000/day enhanced for repeat violators). Covers unauthorized discharge, failure to report, and air emissions. Used for the TCEQ component of the $35,000/day penalty exposure in the ticker.

03Regulatory gap — 126,760 miles

The claim: “126,760 miles of Texas gathering pipeline operate under reporting-only federal oversight.”

  • Texas Pipeline System Mileage Report
    Railroad Commission of Texas · 2025

    State-level breakdown of 472,790 total pipeline miles in Texas. Of the gathering-line portion, only 46,477 miles are under full 49 CFR 192/195 safety regulation. The remaining 126,760 miles are reporting-only — required to report incidents and mileage but NOT subject to integrity management, in-line inspection, pressure testing, or construction-quality mandates.

  • New Federal Regulations Add More Than 400,000 Miles of Gas Gathering Pipelines Under Federal Oversight
    PHMSA / U.S. DOT · November 2021

    PHMSA's own acknowledgment that 425,000+ miles of onshore gas gathering lines were previously unregulated before the 2021 rulemaking. Even after the expansion, much of that mileage sits in the Type R (reporting only) category with no integrity management mandate.

04Case study — Summit Midstream

The claim: “29 million gallons of produced water, 143 days of continuous leaking, $85 million in fines.”

  • North Dakota Pipeline Company to Pay $35 Million for Clean Water Act Violations
    U.S. EPA / DOJ press release · February 2017

    The official DOJ/EPA announcement of the Summit Midstream settlement for the Blacktail Creek spill near Williston, North Dakota (August 2014 – January 2015). The release leaked undetected for 143 days, totaled ~29 million gallons of produced water, contaminated 2,700 acres and 30+ miles of Missouri River tributaries, and resulted in $85 million in total fines and cleanup costs. The DOJ described it as the largest inland spill in U.S. history.

Questions about any of these sources, or spotted something we should add? Email hello@fenceline.io.