Summary

The Barking Creek tidal barrier is downstream of and complementary to the main Thames flood prevention barrier in Woolwich Reach. Preliminary site investigations included boreholes and a ‘sparker’ geophysical survey of the Creekmouth area to determine the geological structure, in particular the depth and attitude of the interface between the Thanet Sand and the Upper Chalk beneath the barrier site. Several subsequent phases of drilling at the site have allowed refinement of the original interpretation, and variations in the levels of the chalk-sand interface previously correlated with east-northeast to west-southwest trending faults are now considered to represent faults trending north-northeast. This direction is consistent with the geological structure in similar rocks determined at the Thames Barrier site 5 km upstream and elsewhere in southern England.

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