33 CFR 110.128 : Navigation And Navigable Waters (§ 1.01-1 To Parts 404-499) — (§ 1.01-1 To Parts 121-124) — Coast Guard, Department Of Homeland Security (§ 1.01-1 To Parts 121-124) — Anchorages (§ 109.01 To § 110.255) — Anchorage Regulations (§ 110.1 To § 110.255) — Special Anchorage Areas (§ 110.4 To § 110.129A) — Columbia River at Portland, Oreg.

The waters of the Columbia River between Sand Island and Government Island, bounded on the west by pile dike U.S. 5.75 and a line extending true north from the northerly end of the dike to the south shore of Sand Island and bounded on the east by a line bearing 339°15′ true, from a point on Government Island at latitude 45°35′10″, longitude 122°32′41″, to the southerly shore of Sand Island.