Statute treatment: 40 C.F.R. § 1501.4

Ranked leading cases interpreting this statute, drawn from 1,061 citation events across 645 distinct cases.

1,061citations total

645distinct interpreting cases

87distinct courts

80citations in last 5y

1979–2025year range

Top 20 leading cases

#1 Ohio Valley Environmental Coalition v. Aracoma Coal Co. (2009) ca4 381 own cites 4× in case

#2 San Luis & Delta-Mendota Water v. Natural Resources Defense Coun (2014) ca9 204 own cites 4× in case

#3 Theodore Roosevelt Conservation Partnership v. Salazar (2010) cadc 134 own cites 4× in case

#4 Monsanto Co. v. Geertson Seed Farms (2010) scotus 899 own cites 2× in case

#5 Davis v. Mineta (2002) ca10 217 own cites 3× in case

#6 Forest Guardians v. United States Fish & Wildlife Service (2010) ca10 74 own cites 4× in case

#7 Sierra Club v. Mainella (2012) dcd 371 own cites 2× in case

#8 Michigan Gambling Opposition v. Kempthorne (2008) cadc 52 own cites 4× in case

#9 United States of America, United States Army Corps of Engineers, Movant-Appellant v. City of Detroit (2003) ca6 30 own cites 5× in case

#10 Heartwood, Inc. v. United States Forest Service (1999) ilsd 17 own cites 7× in case

#11 Delaware Department of Natural Resources & Environmental Control v. United States Army Corps of Engineers (2012) ca3 21 own cites 6× in case

#12 California Trout v. Federal Energy Regulatory Commission (2009) ca9 43 own cites 4× in case

#13 Sierra Club v. Babbitt (1999) caed 20 own cites 6× in case

#14 Craig Rhodes, Charlene Brown, Mark Donham v. James Johnson, District Ranger, Vienna District, Shawnee National Forest (1998) ca7 37 own cites 4× in case

#15 O'Reilly v. United States Army Corps of Engineers (2007) ca5 53 own cites 3× in case

#16 Friends of the Earth, Inc. v. United States Army Corps of Engineers (2000) dcd 30 own cites 4× in case

#17 Public Employees for Environmental Responsibility v. Beaudreau (2014) dcd 19 own cites 5× in case

#18 WildEarth Guardians v. United States Fish & Wildlife Service (2015) ca10 26 own cites 4× in case

#19 Seattle Community Council Federation, a Washington Nonprofit Corporation v. Federal Aviation Administration Samuel Skinner (1992) ca9 38 own cites 3× in case

#20 Delaware Riverkeeper Network v. Federal Energy Regulatory Commission (2014) cadc 84 own cites 2× in case

Ranking method: leading_score = ln(1 + own_citation_count) × √(mentions_in_case) × flag_factor, where flag_factor = 1.0 green · 0.6 unknown · 0.5 neutral · 0.4 yellow · 0.3 procedural · 0 red. Red-flagged cases excluded — their interpretation has been undermined and shouldn't lead the list. Top 20 returned per statute. Open any case for full G Cite, trajectory, and per-circuit treatment.