Engineering Wonders of the World
Volume I

160 ENGINEERING WONDERS OF THE WORLD. SLUICES BETWEEN CANAL AND RIVER MERSEY OPPOSITE INFALL OF RIVER WEAVER. (Photo, R. Banks.) Sheet- piling driven. To prevent further slipping of the bank under the weight that remained to be added, a row of sheet-piling was driven at the back of the outer rubble toe, and be- tween the rubble and the clay hearting, the tops of the piles being tied back to anchor- piles driven down through the clay hearting to the solid ground beneath. In this way the outward movement of the bank was arrested. Immediately afterwards the engineering staff were confronted by another source of perplexity. Questions at issue with the Mersey settled. The Another Source of Perplexity. Conservancy as to certain tidal openings in the embankments remained to be tipping over the site of the opening was stopped at the height of a 14 feet tide—the level of the proposed opening —and consequently this por- tion of the embankment was every tide. At a later date (1890) applica- tion was successfully made to Parliament for power to reduce the number of the tidal openings, which were abandoned altogether, and permission was given for the space left submerged at BARTON LOCKS. (Photo, R. Banks.)