33 CFR § 148.400 - What does this subpart do?

---
identifier: "/us/cfr/t33/s148.400"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "33 CFR § 148.400 - What does this subpart do?"
title_number: 33
title_name: "Navigation and Navigable Waters"
section_number: "148.400"
section_name: "What does this subpart do?"
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "NN"
subchapter_name: "DEEPWATER PORTS"
part_number: "148"
part_name: "DEEPWATER PORTS: GENERAL"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1504; Department of Homeland Security Delegation No. 0170.1 (75)."
regulatory_source: "USCG-1998-3884, 71 FR 57651, Sept. 29, 2006, unless otherwise noted."
cfr_part: "148"
---


# 148.400 What does this subpart do?

(a) This subpart prescribes requirements under 33 U.S.C. 1504(b) for the activities that are involved in site evaluation and pre-construction testing at potential locations for deepwater ports and that may:

(1) Adversely affect the environment;

(2) Interfere with authorized uses of the Outer Continental Shelf; or

(3) Pose a threat to human health and welfare.

(b) For the purpose of this subpart, “site evaluation and pre-construction testing” means studies performed at potential deepwater port locations, including:

(1) Preliminary studies to determine the feasibility of a site;

(2) Detailed studies of the topographic and geologic structure of the ocean bottom to determine its ability to support offshore structures and other equipment; and

(3) Studies done for the preparation of the environmental analysis required under § 148.105 of this part.

[USCG-1998-3884, 71 FR 57651, Sept. 29, 2006, as amended by USCG-2013-0397, 78 FR 39177, July 1, 2013]