Bascule Bridge, Sector Gates, Mitre Gates & Stop Logs

Dover Western Dock Revival (DWDR) was a £100+ million regeneration development by the Port of Dover, which sees the dynamic transformation of the waterfront, designed to attract a host of shops, bars and restaurants with Dover’s unique backdrop of harbour, cliffs and castle, as well as a new cargo terminal and distribution centre

As part of this development programme, Qualter Hall secured the major contract through the Principal Contractor VSBW, a joint venture between Volker Stevin and Boskalis Westminster, for the design, manufacture, delivery, site installation and commissioning of the Bascule Bridge, Sector Gates, Mitre Gates and Stoplogs.

The Bascule Bridge:

  • Single deck overhead cantilever bascule bridge operated by hydraulic cylinders
  • Located above the Wellington Dock Navigation Access (WDNA)
  • Maintains vehicular and pedestrian access along Esplanade Road from Union Street to Waterloo Crescent
  • Lifts to allow shipping to pass between the existing Wellington Dock & the newly constructed Marina
  • Span 16m, Width 15.1m comprising:- 7.3m carriageway, plus 3.6m shared footway and cycle-way to either side of carriageway.
  • Scope includes the complete bridge structure, mechanical parts and the operating system (MEICA) comprising hydraulic power pack, two lift cylinders, pipework, cabling, electric / electronic controls, etc.

The Sector Gates:

  • Two Sector Lock Gates each 12m high, together they span the 10m wide WDNA
  • Control of marine craft access to Wellington Dock
  • Provide flood protection during extreme high tide and storm surge conditions
  • Scope includes the complete gate structure, mechanical parts and the operating system (MEICA) comprising hydraulic power packs, cylinders, pipework, cabling, electric / electronic controls, etc

The Mitre Gates:

  • Two mitre lock gates, each gate is 6m high, together they span the 10m wide WDNA
  • Located in the centre of the WDNA adjacent to the bridge
  • Control of marine craft access to the Wellington Dock
  • Each gate leaf is fitted with two electrically operated penstocks
  • Scope includes the complete gate structure, mechanical parts and the operating system (MEICA) comprising hydraulic power packs, cylinders, pipework, cabling, electric / electronic controls, etc.

The Stop Logs:

  • Provided to allow the WDNA to be dewatered for future maintenance to gates and lock structure
  • Manufacture of Stoplogs and dedicated Stoplog Lifting Beam

Stoplogs were to be provided at each end of the WDNA (Western Dock Navigation Access) and at a mid-lock position, upstream of the mitre gates, to enable future maintenance of the WDNA and the associated gates. The Dock end & Marina Stop Logs were utilised during the Construction phase to enable our Client and the ultimately the end user to build the Navigation Channel under the constraints of the Marina and Dock water levels, the Dock Stop Logs were installed and left during construction for 1 year without any problematic leakage from the existing Dover Wellington Dock.

Testimonials

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