CASE STUDY TRUNK MAIN Falco Construction Ltd was commissioned by Morrison's on behalf of Thames Water to excavate shafts on various large diameter water mains. The purpose of the shafts was to expose the main to enable a leak repair or to facilitate the installation of a valve. Once the work on the main was completed Falco would backfill and reinstate the excavation. The excavations were at various locations around London. The temporary works sys

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