Redundant Flood Lock On Calder And Hebble Navigation - Thornhill, UK
Posted by: Groundspeak Premium Member dtrebilc
N 53° 40.010 W 001° 35.864
30U E 592647 N 5947367
Quick Description: This is an old lock on the Calder and Hebble Navigation that was made redundant when one of the navigation cuts alongside the River Calder was extended.
Location: Yorkshire, United Kingdom
Date Posted: 2/11/2015 10:08:21 AM
Waymark Code: WMNC5Z
Published By: Groundspeak Premium Member cache_test_dummies
Views: 0

Long Description:

The Calder and Hebble Navigation
The Calder and Hebble Navigation completed in 1770 consisted of artificial improvements to the River Calder and River Hebble to allow canal boats use what used to be un-navigable rivers.

It ran for 21 miles from the Aire and Calder Navigation at Wakefield to Sowerby Bridge, was one of the first navigable waterways into the Pennines. It was an extension westwards of the Aire and Calder Navigation.

Work began in 1758 to make the River Calder navigable above Wakefield. The navigation to Sowerby Bridge was completed in 1770, including a short branch to Dewsbury.

In 1828 a branch to Halifax was opened, rising 110 feet to a terminus at Bailey Hall, behind Halifax Railway Station. There were 14 locks on the branch which closely followed the route of the River Hebble. Most of the branch was abandoned in 1942 apart from the short section from Salterhebble to Exley.

About half of the navigation is along the course of the River Calder, with short man-made cuts with locks to by-pass weirs. There are two lengthy man-made sections, from Calder Grove to Ravensthorpe and from Brighouse to Sowerby Bridge.

Most commercial traffic on the Calder and Hebble had ceased by 1955, although coal was still carried to Thornhill power station until 1981. However, the whole of the Calder and Hebble remained open for leisure use. The re-opening of the Rochdale Canal between Sowerby Bridge and Littleborough summit in 1996 and Manchester in 2002 has increased the traffic along the Calder and Hebble and it now forms part of the South Pennine Ring.

The Lock
This lock is in the middle of one of the artificial navigation cuts that bypass the main course of the river Calder. This stretch is longer than some of the other sections and is known as the Long Cut. As a result the height difference between the upstream end of the cut and the downstream end requires a number of locks in the middle to cope with the height difference.

Originally this lock was the downstream end of the cut and connected the cut to the River Calder. Eventually it was decided to extend the cut and this lock was bypassed. The descent of this single lock was replaced with two shallower locks nearby.

Because this lock connected the navigation to the river it would have been a flood lock. Although acting as a normal lock, the use of the lock could be dangerous when the river was in flood. Once the river reached a dangerous level the lock would have been closed and boat traffic suspended until the river level reduced to normal levels.
Waterway Name: Calder and Hebble Navigation

Connected Points:
Connects the Rochdale Canal at Sowerby Bridge with the Aire and Calder Navigation at Wakefield. There was also a branch of the canal at Salterhebble that used to go to Halifax but this was closed in 1942. There is also a junction with the Huddersfield Broad canal at Cooper Bridge that goes to Huddersfield.

Type: Lock

Date Opened: 1/1/1770

Elevation Difference (meters): 4.00

Site Status: Remnants

Web Site: [Web Link]

Date Closed (if applicable): Not listed

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