---
kind: "unit"
title: "33"
title_heading: "Navigation and Navigable Waters"
key: "chII/part221"
level: "part"
label: "Part 221"
heading: "Work for Others"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/33/chII-part221"
sections_count: 1
---

# Part 221 — Work for Others

Title 33 C.F.R. — Navigation and Navigable Waters › Chapter II — Corps of Engineers, Department of the Army, Department of Defense

## Sections

- [§221.1. Investigation and supervision of hydropower projects under the Federal Power Act (ER 1140-2-4).](/cfr/33/221.1.md)