Theodore Angelí, proceeding pro se, appeals from a May 29, 2001 judgment of the United States District Court for the Eastern District of New York (Denis R. Hurley, Judge), granting the Government summary judgment and holding that An-gelí violated the Rivers and Harbors Appropriation Act of 1899, 33 U.S.C. §§ 401 et seq., by adding two floats to his dock in the Silver Brook Canal in Flanders, New York, without a permit from the United States Army Corps of Engineers (“Army Corps”).
I.
The material facts are undisputed. An-gelí is a resident of Flanders, in Suffolk County, New York. His property is located at the end of the Silver Brook Canal, a small channel approximately 45 to 50 feet wide and 500 feet long. The Canal is an arm of Reeves Bay, which adjoins Flanders Bay, which in turn provides access to Long Island Sound and the Atlantic Ocean. When tidal conditions permit, the Canal is used by small pleasure boats, including Angell’s.
In 1988, based on plans he submitted to the Army Corps, Angelí applied for and obtained an Army Corps permit that authorized (i) the installation of a “timber pier assembly” consisting of a pier, a walk ramp attached to the pier and connected to an outer float, and a timber bulkhead, and (ii) the deposit of certain fill trucked in from a site upland from the bulkhead. Angelí subsequently built the foot pier, ramp, outer float, and bulkhead as allowed by the permit.
Thereafter, storms apparently caused significant damage to the dock system. To protect the structure, in the early 1990s, Angelí applied for and was granted a permit from the New York State Department of Environmental Conservation (the “DEC”) to build two additional floats that, together with the initial outer float, form a “U” shape. The Town of Southampton, in which Flanders is located, also issued permits for construction of the two floats in 1992 and 1993. Unlike 1988, however, An-gelí did not apply directly to the Army Corps for a permit, although he used a joint DEC-Army Corps application form, and he has never received an Army Corps permit for the additional floats. The dock structure, which spans most of the width of the Canal, currently comprises a foot pier and ramp leading to a U-shaped floating dock consisting of the initial float and two additional outer floats.
The United States sued in December 1997 alleging, inter alia, that the Canal was a navigable waterway, that the new construction had not been authorized by the 1988 permit, and that the additional *336 floats were unlawful without a permit from the Army Corps. The Government sought an injunction to compel Angelí to remove the floats and, after discovery, moved for summary judgment in September 2000. In May 2001, the District Court granted the motion, finding that the Canal, as a tidal water body susceptible to interstate or foreign commerce, was navigable under section 10 of the Rivers and Harbors Appropriation Act, 33 U.S.C. § 403; 33 C.F.R. § 329.4, and that the new construction was prohibited without an Army Corps permit. The District Court issued an injunction under section 12 of the Act, 33 U.S.C. § 406, requiring Angelí to remove the new floats and to refrain from installing additional structures in violation of section 10.
II.
We review the grant of summary judgment
de novo. Golden Pac. Bancorp v. FDIC,
Section 10 of the Rivers and Harbors Appropriation Act provides in relevant part:
The creation of any obstruction not affirmatively authorized by Congress, to the navigable capacity of any of the waters of the United States is prohibited; and it shall not be lawful to build or commence the building of any ... pier ... or other structures in any ... canal ... or other water of the United States ... •except on plans recommended by the Chief of Engineers and authorized by the Secretary of the Army....
33 U.S.C. § 403 (2000). Thus, “a permit from the Army Corps of Engineers is required for the installation of any structure in the [nation’s] navigable waters which may interfere with navigation, including piers, docks, and ramps.”
PUD No. 1 of Jefferson County v. Washington Dep’t of Ecology,
The Silver Brook Canal is tidal, as its level fluctuates with the ebb and flow of the tide. In fact, as Angelí concedes, easy passage is apparently possible only when the tide is high. Accordingly, we conclude that the Canal is navigable.
See United States v. Stoeco Homes, Inc.,
Angelí used a joint DEC-Army Corps permit application form to apply to the DEC for permission to build the two additional floats. He argues that this form shows that the Army Corps delegated its permitting authority to the DEC, rendering a separate application to the Army unnecessary. Because Angelí neglected to raise this argument in the District Court, it is not properly before us.
See Robinson v. Gov’t of Malaysia,
*338
Finally, to the extent Angelí contends that the Government should be barred by laches, he is mistaken. Beyond the fact that Angelí did not argue this issue below, laches is not available against the federal government when it undertakes to enforce a public right or protect the public interest.
See United States v. Summerlin,
Because Angelí constructed additional docks in the Canal without the required Army Corps permit, the judgment of the District Court is Affirmed.
Notes
.
Stoeco Homes
is particularly helpful for the distinction between tidal and non-tidal waters for purposes of determining navigability. The admiralty definition of navigability, adopted from English common law, focused on the ebb and flow of the tide. However, in
The
*337
Daniel Ball,
