45 CFR § 900.405 - Proposals normally requiring an EIS.

---
identifier: "/us/cfr/t45/s900.405"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "45 CFR § 900.405 - Proposals normally requiring an EIS."
title_number: 45
title_name: "Public Welfare"
section_number: "900.405"
section_name: "Proposals normally requiring an EIS."
chapter_name: "DENALI COMMISSION"
part_number: "900"
part_name: "NATIONAL ENVIRONMENTAL POLICY ACT IMPLEMENTING PROCEDURES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 3121, 4321; 40 CFR parts 1500 through1508."
regulatory_source: "81 FR 53033, Aug. 11, 2016, unless otherwise noted."
cfr_part: "900"
---


# 900.405 Proposals normally requiring an EIS.

An EIS will normally be required for:

(a) Large scale infrastructure construction efforts such as the relocation of an entire community;

(b) A project that requires a formal consultation under Section 7 of the Endangered Species Act; or

(c) Where implementation of the proposal may directly cause or induce changes that significantly:

(1) Displace population;

(2) Alter the character of existing residential areas; or

(3) Adversely affect a floodplain.