Chapter 5: Using Existing Environmental Analyses 

Section 5.1: Determination of NEPA Adequacy

• 516 DM 11.6
   
• Examples of Completed DNA Worksheets
   
• Examples of DNA-Level Decisions

Section 5.2: Incorporation by Reference and Tiering

• 40 CFR 1502.21
   
• Example of Incorporation by Reference
   
• 40 CFR 1508.28
   
• 40 CFR 1502.20

Section 5.3: Supplementing an EIS

• Norton v. Southern Utah Wilderness Alliance, 542 U.S. 55 (2004) (PDF)
   
• 40 CFR 1502.9(c)(1)(i)
   
• Forty Most Asked Questions Concerning CEQ's NEPA Regulations, Question 29b
   
• 40 CFR 1502.9(c)(1)(ii)
   
• 40 CFR 1502.9(c)(4)
   
• 40 CFR 1502.9 

Section 5.4: Adopting Another Agency's NEPA Analyses

• 40 CFR 1506.3(a)
   
• Forty Most Asked Questions Concerning CEQ's NEPA Regulations, Question 30
   
• 40 CFR 1506.3(c)
   
• 40 CFR 1506.3(b)
   
• CEQ Guidance Regarding NEPA Regulations, 48 Fed. Reg. 34263 (July 28, 1983) (External Website)