Lagan Weir, Water control structure in Belfast, United Kingdom.
The Lagan Weir spans the River Lagan between Queen Elizabeth Bridge and the M3 bridge, with five metal gates designed to control water movement. Each gate measures 18 meters high by 5 meters wide and operates independently to manage river levels.
The structure was built in 1994 as part of a major waterfront redevelopment project for Belfast. This construction marked a turning point in how the city managed its river and its connection to the water.
The structure connects the docks to the Odyssey complex via a walkway and creates a central gathering point for locals and visitors. People use this spot regularly to walk, watch the river, and enjoy views of the waterfront and city.
The site is easily reached on foot via walkways and offers good vantage points to view the river from multiple spots. Daytime visits work best when you can see the gates and surroundings clearly.
The gates light up in neon blue at night, creating a striking glow over the river. Each gate weighs around 32 tonnes and requires specific procedures to allow boats to pass safely through.
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