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RIVER AVON SCOUR PROTECTION SYSTEMS

RIVER AVON SCOUR PROTECTION SYSTEMS

PROJECT BRIEF The installation of eco sensitive scour protection systems around the abutment structure of a main line railway bridge spanning the River Avon.  With   the site being of SSSI and the land privately owned by the Royalty Fisheries, strict protocol and operating procedures had to be adhered to at all times making this project both ambitious and complex.  With rock armour already in situ we were initially assigned to create a mattress formulated from an interlinked articulated fabric formwork that was both conducive in design to the footprint of the abutment structure and environmentally friendly.
RESPONSIBILITIES As project manager of all subsea operations I was responsible for compiling the dive management system daily which included all processes, methodologies and risk assessment strategies in an effort to ensure that works were carried out in accordance with our clients requests.  This project presented many potentially dangerous and demanding situations which all required thorough evaluation and meticulous planning and management.  As part of my structured planning process and risk assessment strategy I provisioned so far as reasonably practical for the protection of the river eco system throughout all works.
CLIENT MMC Diving Services | Aquatic Engineering | Dyer and Butler Ltd
CHALLENGES This task was both complex and challenging due to the incalculable conditions presented daily.  High volumes of water passing through the working zone required systems and strategies to be implemented and vigorously managed throughout the lifecycle of the project.  Sheer velocities alone blew out several “supplied” containment curtains beyond economic repair resulting in myself and my colleague to take matters into our own hands by re-designing a 60m x 4m heavy duty version to enable the project to continue.  Manoeuvring the excavation units on their floating platforms proved an additionally challenging exercise due to height restrictions, draft restrictions, maximum flow rates and onsite protocol.  Flood waters continued to present extreme conditions resulting in a temporary series of rock rolls to be installed until the flows abated.
RISK RATING High Risk
OUTCOME Ongoing
Stacey Rivers Project Management