982 F.3d 569
9th Cir.2020Background
- The Project: Caltrans proposed modest roadway widenings and curve straightening along a one-mile stretch of US‑101 through Richardson Grove State Park to accommodate longer STAA trucks, improve safety, and facilitate freight movement; some excavation and roadbed would occur within structural root zones of old‑growth redwoods.
- Environmental review history: Caltrans issued a 2010 EA and FONSI, supplemented in 2013 and revised in 2017 after additional tree assessments by arborist Dennis Yniguez; the 2017 FONSI concluded impacts would be minor with mitigation.
- Tree impacts: The revised Project would remove 38 trees (none old‑growth) and involve root‑zone disturbance within structural root zones of 78 old‑growth redwoods; arborist reports concluded few trees would suffer lasting harm and mitigation would reduce effects.
- Procedural posture: Plaintiffs (Bair et al.) sued under NEPA (and related laws). The district court held the EA inadequate—finding Caltrans failed to take a "hard look" on several issues—and ordered preparation of an EIS and enjoined the Project.
- Ninth Circuit decision: The court reversed and remanded, holding Caltrans’ EA (and 2017 FONSI) were not arbitrary or capricious because the agency reasonably evaluated suffocation risk from paving, construction impacts (including disease), traffic/noise, and collision risk; it vacated the injunction and remanded remaining claims for further proceedings.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Risk that paving over root zones will "suffocate" redwoods | Bair: covering >50% of root zones or paving will severely harm/suffocate trees; EA failed to analyze this threshold | Caltrans: evaluated percent coverage for each tree, will use permeable roadbed material and mitigation; expert concluded redwoods resilient | Held: Caltrans adequately considered paving effects; reliance on expert and mitigation reasonable; no arbitrary/ capricious failure to analyze a 50% "threshold" |
| Construction in structural root zones causing root disease | Bair: EA did not evaluate whether excavation would introduce or exacerbate root diseases | Caltrans: arborist and literature show redwoods have few significant disease enemies; considered construction guidelines and individual tree analyses | Held: Caltrans reasonably considered disease risk; reliance on species‑specific expert opinion appropriate |
| Project will increase truck volume and visitor‑experience noise | Bair: opening route to STAA trucks will increase truck numbers and noise, harming visitor experience | Caltrans: traffic studies, business surveys, and unchanged highway capacity show little latent demand or diversion; therefore truck counts and noise unlikely to increase | Held: Caltrans reasonably concluded traffic and noise would not appreciably increase; EA adequate |
| Frequency and severity of truck collisions with trees | Bair: longer/heavier STAA trucks will collide more often and cause greater tree damage | Caltrans: Project widens roadway to reduce off‑tracking and collisions; no record evidence STAA trucks cause worse damage | Held: Caltrans reasonably analyzed collision frequency (likely decreased); severity claim speculative and not administratively exhausted; EA adequate |
Key Cases Cited
- Dep’t of Transp. v. Pub. Citizen, 541 U.S. 752 (Supreme Court standard for when an EIS is required versus using an EA/FONSI)
- Ctr. for Biological Diversity v. Nat’l Highway Traffic Safety Admin., 538 F.3d 1172 (NEPA "hard look" and FONSI review in Ninth Circuit)
- Native Ecosystems Council v. U.S. Forest Serv., 428 F.3d 1233 (agency must take a hard look; review standard explained)
- Lands Council v. McNair, 537 F.3d 981 (courts should not act as panels of scientists; limits on judicial substitution of judgment)
- Ocean Advocates v. U.S. Army Corps of Eng’rs, 402 F.3d 846 (examples of inadequate consideration of environmental effects)
- In Def. of Animals v. U.S. Dep’t of the Interior, 751 F.3d 1054 (agency may rely on expert opinion; not required to adopt every recommendation)
- WildEarth Guardians v. Provencio, 923 F.3d 655 (agency discretion in weighing conflicting expert views)