Statute treatment: 40 C.F.R. § 1502.15

Ranked leading cases interpreting this statute, drawn from 30 citation events across 25 distinct cases.

30citations total

25distinct interpreting cases

15distinct courts

3citations in last 5y

1986–2025year range

Top 20 leading cases

#1 Center for Biological Diversity v. United States Department of the Interior (2009) cadc 147 own cites 4× in case

#2 Western Watersheds Project v. Bureau of Land Management (2008) nvd 10 own cites 3× in case

#3 Oregon Natural Desert Ass'n v. Jewell (2016) ca9 26 own cites 1× in case

#4 Havasupai Tribe v. United States (1990) azd 20 own cites 1× in case

#5 Wildearth Guardians v. U.S. Bureau of Land Management (2014) dcd 13 own cites 1× in case

#6 Oregon Natural Resources Council v. Marsh (1986) ord 12 own cites 1× in case

#7 Aqualliance v. U.S. Bureau of Reclamation (2018) caed 9 own cites 1× in case

#8 San Juan Citizens Alliance v. U.S. Bureau of Land Mgmt. (2018) nmd 7 own cites 1× in case

#9 Piedmont Environmental Council v. United States Department of Transportation (2001) vawd 18 own cites 1× in case

#10 MooreFORCE, Inc. v. United States Department of Transportation (2003) ncmd 4 own cites 1× in case

#11 Save Our Cabinets v. United States Department of Agriculture (2017) mtd 3 own cites 1× in case

#12 The Laguna Greenbelt, Inc. v. United States Department Of Transportation (1994) ca9 2 own cites 1× in case

#13 Defenders of Wildlife v. North Carolina Department of Transportation (2013) nced 2 own cites 1× in case

#14 Southern Utah Wilderness Alliance v. Burke (2013) utd 2 own cites 1× in case

#15 National Audubon Society v. Department of the Navy (2005) ca4 3 own cites 1× in case

#16 Oregon Natural Desert Ass'n v. Jewell (2016) ca9 4 own cites 1× in case

#17 Government of the Province of Manitoba v. Salazar (2013) dcd 1 own cites 1× in case

#18 Oregon Natural Resources Council v. Marsh (1995) ca9 1 own cites 1× in case

#19 Advocates v. U.S. Forest Serv. (2018) cod 1 own cites 1× in case

#20 Laguna Greenbelt, Inc. v. United States Department of Transportation (1994) ca9 2 own cites 1× 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.