Each lock is crossed by a Bascule bridge, to carry pedestrians and vehicles across. These are lifted for boats to pass. The weight of the bridge deck is counterbalanced by an overhead weight on the opposite side of the pivot.

Five sluice gates control the level of water in the Bay. Each sluice gate is 9 metres wide and 7.5 metres high. The sluices open to maintain the level of the Bay, and close when the estuary level is higher than the Bay to prevent seawater entering the freshwater lake.

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Best routes to Cardiff Bay Barrage Locks

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1. Cardiff Bay Barrage Locks – Blue Bridge, Radyr loop from Radyr

33.3km

01:56

170m

Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

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Easy

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2. Cardiff Bay Barrage Locks – Roath Basin Bridge loop from Barry

46.0km

02:37

370m

Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

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Moderate

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Elevation 10 m

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Today

Saturday 21 February

12°C

9°C

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Location: Penarth, Vale of Glamorgan, South Wales, Wales, United Kingdom

Other Popular Places to Check Out

Cardiff Bay Barrage

Pierhead Building, Cardiff Bay

Cardiff Castle

Bute Park

The Animal Wall

View of Cardiff from Craig Llysfaen (Lisvane Graig)

Roath Park Rose Garden

Cardiff Barrage

West Side of Cardiff Bay

Roath Basin Bridge

Cardiff Bay Barrage Locks

1. Cardiff Bay Barrage Locks – Blue Bridge, Radyr loop from Radyr

2. Cardiff Bay Barrage Locks – Roath Basin Bridge loop from Barry

Other Popular Places to Check Out

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