1-й мост Круштейна, Steel bridge in Admiralteysky District, Russia.

The First Krushtein Bridge spans the Admiralty Canal, connecting New Holland Island to the Second Admiralty Island. This steel structure measures about 14 meters long and 9 meters wide, allowing both vehicle and pedestrian traffic across the waterway.

The bridge was known as the New Holland Bridge until 1836, then as the Dutch Bridge from 1836 to 1846, and as the New Holland Bridge again until 1922. Its present name was assigned in the 1950s after the canal. The existing metal bridge was built in 1939 to replace a wooden one, and between 1998 and 2000 corroded metal beams and the upper structure were replaced with new waterproofing.

The bridge's name comes not from a person but from the nearby Krushtein Canal. Before 1836 it was called the New Holland Bridge, then the Dutch Bridge (1836–1846), and later the New Holland Bridge again; the present name was assigned in the 1950s after the canal.

The bridge carries one lane of motor traffic plus pedestrians; the roadway and sidewalks are asphalt, with sidewalks separated from traffic by a granite parapet. It stands opposite houses No. 5 and 7 on the Admiralty Canal embankment, with the nearest metro, Admiralteyskaya, about 1.6 km away. The 2nd Krushtein Bridge lies downstream.

The bridge's metal railing copies the pattern of the railings on the Fontanka River embankments, not the Moyka. The railing ends at granite parapets on the abutments. The name Krushtein was given in the 1950s after the canal, replacing Novaya Gollandiya and Gollandsky.