page_title: Port of Grimsby
section_title: No.3 Dock (1934–)
hierarchical_section_title: Port of Grimsby / History / Royal and Fish Docks / Fish Docks (1857–) / No.3 Dock (1934–)
caption_attribution_description: English: Diagram of No.3 (and No.1) fish dock, Grimsby c.1934 (as built) From: The New Fish Dock, Grimsby (No.I)&#32;(7 December 1934).
context_page_description: The Port of Grimsby is located on the south bank of the Humber Estuary at Grimsby in North East Lincolnshire. Sea trade out of Grimsby dates to at least the medieval period. The Grimsby Haven Company began dock development in the late 1700s, and the port was further developed from the 1840s onwards by the Manchester, Sheffield and Lincolnshire Railway and its successors. The port has had three main dock systems:
  The earliest dock, or Old Dock was developed in the 1790s, downriver from the medieval Haven, on the outfall of the same water course; in around 1880 it was expanded westwards, and renamed Alexandra Dock, being connected to the Royal Dock system by a short canal, named the Union Dock. From the 1880s the dock's focus was coal, later timber. From the 1970s onwards the dock has been used for large-scale car importation.
  The Royal Dock was developed from the 1840s onwards, contemporary with the arrival of the railway – it was built on a large area of land reclaimed from the Humber Estuary north-east of the original town and harbour. The dock's trade has included a wide variety of goods including coal, timber and general merchandise.
context_section_description: A need for an additional fish dock was seen from the early 20th century – the Great Central Railway (GCR) obtained an act for a fish dock in 1912 (2 & 3 Geo. V, Cap.165 1912); the dock was to extend No.1 dock to the east onto land reclaimed from the Humber. The scheme was abandoned due to the eruption of the First World War, after which the cost of the scheme has increased from the initial estimate of £0.5 million to £1.2 million; as a result, the scheme was not proceeded with.  Later the GCR's successor the London and North Eastern Railway (LNER) proposed to the Grimsby Corporation that if the Corporation built a dock, the LNER would pay rent for use of the dock, until such time as the cost of dock and loans were repaid, at which point it would take over the dock – this scheme was agreed with and the Corporation applied for a bill in Parliament. The Grimsby Corporation (Dock, etc.) Act was passed in 1929. The dock was initially designed by chief dock engineer of the LNER J.A. Wickham, who died April 1930, and was succeeded by A. Tulip. The firm of John Wolfe Barry and partners were appointed engineers. Funding was aided by a governmental grant, intended to reduce unemployment.
  The works included a reclamation of land to the north-east of the original fish dock, and a new river embankment of 6,800 feet (2,100 m) extending east-south-east into the district of Cleethorpes, enclosing substantial additional land in addition to the dock, including areas for railway sidings and up to 39 acres (16 ha) for industrial development. The north quay of No.1 dock (known as "Campbell's Jetty") was to be removed, making the No.1 and new fish docks contiguous with one another – the new dock water area was 37 acres (15 ha) giving a total water area of the No.1 and No.3 docks of 50 acres (20 ha).
  Planned dock facilities included a 2,200 feet (670 m) north quay, rail fed coaling jetties on the east quay, and outfitting jetties and slipways on the south-east side. A third lock 45 feet (14 m) wide was to be constructed adjacent east and parallel with the existing locks of the fish dock; additionally the fish dock east entrance pier was to be removed, and a new pier constructed on the east side of the new lock. Other changes required included the rerouting of a sewer and its outfall channel further east. The estimated cost of the works was £1.418 million of which the Corporation was enabled to raise £1.25 million, the remainder by the LNER, who agreed to a thirty-year lease on the dock. The company of Sir Lindsay Parkinson was contracted to carry out the work. A.E. Tarrant was the resident engineer.
  Work on the dock began in November 1930. The diversion of sewer, river embankment, and steel sheet pile cofferdam for construction of the new lock were all complete by May 1932. The embankment was constructed primarily of tipped chalk, faced on the seaward side with concrete blocks. Dock construction required excavation of approximately 1,000,000 cubic yards (760,000 m³) of material, primarily by dragline excavator, much of which was used to fill other areas of the newly enclosed land. Spoil and slag from Scunthorpe was also used as fill on the reclaimed land. The new 45 ft lock was 240 feet (73 m) long total with three gates. It was built on 12 inches (300 mm) square timber piles, supporting a square bottomed concrete lock pit. 'Blows', (underground springs) were encountered when excavating the lock's west wall foundations, undermining the work, and causing the newly laid concrete to crack. Work was delayed by remedial work to counter these springs, consisting of sunken centrifugal pumps used to draw of the water, temporarily reducing the local level of the water table. The lock was faced with granite. A pipe subway lined with cast iron segmental rings ran under part of the lock, carrying services (hydraulic, water, electricity). The initially installed gates were of oak, operated by hydraulically activated chains. The new east pier was 500 feet (150 m) long and constructed of timber, on the west side part of the old pier was removed and a new 175
caption: 1934 diagram (The Engineer). No.3 Dock extension in the context of Nos. 1 & 2 Fish and Royal docks
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