Statute treatment: 40 C.F.R. § 1500.1

Ranked leading cases interpreting this statute, drawn from 534 citation events across 372 distinct cases.

534citations total

372distinct interpreting cases

71distinct courts

77citations in last 5y

1974–2026year range

Top 20 leading cases

#1 Center for Biological Diversity v. National Highway Traffic Safety Administration (2008) ca9 139 own cites 8× in case

#2 Department of Transportation v. Public Citizen (2004) scotus 591 own cites 3× in case

#3 The Lands Council v. McNair (2008) ca9 541 own cites 2× in case

#4 Barnes v. United States Department of Transportation (2011) ca9 93 own cites 3× in case

#5 Marsh v. Oregon Natural Resources Council (1989) scotus 2,016 own cites 1× in case

#6 Tri-Valley Cares v. U.S. Department of Energy (2012) ca9 137 own cites 2× in case

#7 Theodore Roosevelt Conservation Partnership v. Salazar (2010) cadc 134 own cites 2× in case

#8 WildEarth Guardians v. Zinke (2019) cadc 31 own cites 4× in case

#9 Colorado Environmental Coalition v. Dombeck (1999) ca10 131 own cites 2× in case

#10 Oregon Natural Desert Ass'n v. Jewell (2016) ca9 26 own cites 4× in case

#11 Alaska Wilderness League v. Sally Jewell (2015) ca9 26 own cites 4× in case

#12 Dine Citizens Against Ruining Our Environment v. Haaland (2023) ca10 25 own cites 4× in case

#13 Center for Biological Diversity v. National Highway Traffic Safety Administration (2007) ca9 9 own cites 8× in case

#14 Sierra Forest Legacy v. Sherman (2011) ca9 91 own cites 2× in case

#15 Te-Moak Tribe of Western Shoshone v. United States Department of Interior (2010) ca9 75 own cites 2× in case

#16 Oregon Natural Desert Ass'n v. Bureau of Land Management (2010) ca9 71 own cites 2× in case

#17 Sierra Club v. Bosworth (2007) ca9 70 own cites 2× in case

#18 Greenpeace v. National Marine Fisheries Service (1999) wawd 22 own cites 3× in case

#19 Habitat Education Center, Inc. v. United States Forest Service (2012) ca7 13 own cites 4× in case

#20 Western Watersheds Project v. Kraayenbrink (2010) ca9 19 own cites 3× 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.