Portsbridge Creek (also Port Creek, Ports Creek and Canal Creek) is a tidal waterway that runs between Portsea Island and the mainland [1] from Langstone Harbour to Tipner Lake. Through its history it has been made navigable a number of times and it is today navigable for small boats.
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During the English Civil War Royalist forces attempted to hold the parliamentarian forces at the creek during the early stages of the Siege of Portsmouth.[2] Defences consisted of a wooden barricade mounted on the bridge backed by a small fort equipped with 4 guns.[2] The guns were withdrawn on 10 August 1642 and with the barricade held by as few as 8 men the parliamentarian forces were able to cross the creek two days later.[2]
It has been suggested that the presence of a customs officer in Cosham was to deal with attempts at landing contraband from Portsbridge Creek.[3]
The waterway was made navigable by the Portsmouth & Arundel Navigation company in 1830 after the failure of the Portsea canal.[4] The work to deepen the creek cost £1000.[5] It proved difficult to keep the creek clear for navigation and a canal called the Cosham Canal to provide an alternative route was proposed, although it was never built.[6] The canal company abandoned the creek in 1838.[4] An army report on the status of the Hilsea lines made in 1853 mentioned that the creek was filled with weeds to the point where for 3 to 4 hours every day it could be walked across.[7] Later in the decade as part of upgrade works on the Hilsea Lines, the creek was widened and deepened to allow it to be used by gunboats.[8] Dams and flood gates were constructed at the ends of the creek to allow it to be kept it in water at all stages of the tide.[9] The remains of one of these dams can be seen at the eastern end of the creek.[9]
In 1963 there was a suggestion that it be redeveloped as the Dunkirk Memorial Channel.[1] In the late 1960s the A27 was built on part of the channel while the remainder was dredged.[10] This, along with other improvements, made the creek navigable for small boats.[10]
Bridges have been built across the creek at various locations. The first record of a bridge across the creek date from the last decade of the 12th century.[11] In the 15th-century double-arched stone bridge was built at the western end of the creek.[12] In 1867 a new retractable bridge was constructed at a cost of £5,000 to allow the passage of gunboats.[13] The bridge was built as a steel frame with a wooden deck consisting of two two 12-foot-wide (3.7 m) lanes.[13] In 1904 the bridge was transferred to the Portsmouth Corporation (forerunner of Portsmouth City Council) who fixed it in place and reinforced it to allow trams to run across it.[13] The bridge was replaced by a wider bridge in 1927,[13] which in turn was replaced by the current structure in 1970 during the construction of the A27.[13]
The London, Brighton and South Coast Railway built a wooden bridge across the creek in 1847.[12] This was replaced by a swing bridge in 1870.[14] An Admiralty order required the bridge to open between 2 and 3am on the first Sunday of every February.[14] The swing bridge was itself replaced in 1909.[12] A bridge was added at the eastern end of the creek in 1941.[12] Another crossing built during World War 2 was a causeway with the creek being limited to a small pipe.[1] This was replaced by a footbridge during the construction of the A27.[10]