Environmental Review Toolkit

Section 4(f) Tutorial

Section 4(f) Overview

This section will start you off with a general overview of the statute known as Section 4(f). More detailed information about each topic presented here is available as you navigate through this site.

collapse list Does Section 106 of the National Historic Preservation Act duplicate Section 4(f)?

The NHPA and Section 4(f) are separate laws with very different requirements; however, there is some overlap when historic properties are involved. A key difference between the two laws is that Section 106 is essentially a consultative procedural requirement. In contrast, Section 4(f), which is a substantive law, precludes project approval if there is a use of a historic site when a prudent and feasible avoidance alternative is available. It should be noted that an adverse effect finding under Section 106 and a Section 4(f) "use" are not the same. You will find more discussion on this point in the Related Statutes section.