Cork County Council Baltimore Pier Road Widening Outline Construction Method Statement Date: 24 January 2013 Job No: C615 Client: Cork County Council Cronin Millar Consulting Engineers Contents Page No. 1.0 Scope of Works 2 2.0 Brief Description of Works 2 3.0 Method Statement 2 4.0 Programme 2 5.0 Environmental Protection 3 6.0 Potential Impacts and Mitigation Measures 3 Revision Control Table & Document History Record Rev. 1 Date 12/02/2013 Description & Reason for Issue Issued for Foreshore Orig. CC Chkd. SMC App. AC No part of this document may be re-produced or transmitted in any form or stored in any retrieval system of any nature, without written permission of Cronin Millar Consulting Engineers, as copyright holder, except as agreed for use on this specific project. Page 1 Cronin Millar Consulting Engineers 1.0 SCOPE OF WORKS The Baltimore Pier Road is located in Baltimore Harbour, Co. Cork. The public road is primarily used as a means of access between the village of Baltimore, and the West Pier and adjacent public car park. Cork County Council intends to widen the road to reduce congestion and improve access between the village of Baltimore and the West Pier. 2.0 BRIEF DESCRIPTION OF WORKS The works will consist of the construction of a new reinforced concrete quay wall on excavated bedrock. Excavated bedrock material and engineered fill will be placed inside the quay wall and a reinforced concrete deck will be connected to the quay wall. Hot rolled asphalt road surfacing and concrete footpaths will be placed on top of the reinforced concrete deck at appropriate locations. 3.0 METHOD STATEMENT On arrival at site, the contractor will set up suitable security fencing to create a site compound at the Pier Road. The site compound area will be agreed between the contractor and Cork County Council. Vehicle access on the Pier Road will be prohibited for the duration of the works. Pedestrian access will be maintained during the initial excavation phase and construction of the quay wall and will be limited for a short period during the construction of the pier deck and road surface. Pedestrian access to the public toilet building from the village will be maintained for the duration of the works. A site office, canteen, welfare unit and store will be established within the enclosure. A long reach excavator will be positioned on the Pier Road and on the foreshore above the low water mark in order to excavate bed rock and seabed overburden for the foundation of the new quay wall. The seabed will be excavated to a depth of -3.50m OD Malin. All dredge material including dredge mud, sand, gravel, rock waste etc. will be reused as fill material behind the new quay wall, following temporary storage on site. All excavation will take place above the low water mark. Please refer to the attached Waste Management Plan for further information. The existing handrail and pier furniture will be removed and recycled at a suitable facility. A series of steel columns and beams will be erected outside the line of the new quay wall as temporary works. Precast concrete panels will be fixed to the temporary works structure and a concrete base will be cast in-situ using a concrete pump to create an “L Shaped” retaining wall. The quay wall will be backfilled with all of the excavated material and engineered fill. The material behind the quay wall will be compacted to the appropriate level. Subsequently, service ducts and watermain ducting will be installed before the deck is steel fixed and the reinforced concrete deck is poured. The concrete footpaths and deck will be cast concurrently. A section of reinforced concrete deck will be cast on top of the existing Cattle Slipway to connect the existing structure to the raised road. Hot rolled asphalt will be laid on the reinforced concrete pier road deck as a road surface for vehicle traffic. Handrails and ladders will be post fixed to the pier structure. Road lining will take place before the road is reopened. The contractor will then remove all plant and site compound. 4.0 PROGRAMME To be agreed. Page 2 Cronin Millar Consulting Engineers 5.0 ENVIRONMENTAL PROTECTION All works will be carried out in accordance with CIRIA “Coastal and Marine Environmental Site Guide” (C584). Works will also be in accordance with the granted Planning Permission Conditions and Foreshore Lease/Licence Conditions. 6.0 POTENTIAL IMPACTS AND MITIGATION MEASURES 6.1 Excavation Noise Generation Noise will be generated during the excavation of the sea bed. All excavation will be undertaken above the low water mark. Water Quality Sediments will not disperse into the sea during the excavation as all works will be undertaken above the low water mark. Care will be taken by the excavator operator not to overfill the bucket causing spills when excavating. Excavated material will not be stored close to the edge of the quay, thus eliminating sediments washing into the sea. 6.2 Temporary Works Noise Generation Noise will be generated during the installation of temporary works. Steel columns will be driven into the sea bed above the low water mark using a hydraulic piling hammer. 6.3 Construction of Concrete Base and Walls Noise Generation Noise will be generated during the construction of the concrete base and walls through shuttering and concrete pouring. All concrete will be poured above the low water mark. Water Quality Concrete and / or cements will not disperse into the sea during the construction of the base and walls as all works will be undertaken above the low water mark. 6.4 General Hydrocarbon Spills In the unlikely event of hydrocarbon spills from plant, spill kits will be used to clean the spill using best practices. If a spill occurs in the water a containment boom will be deployed around the perimeter of the spill and synthetic absorbent pads will be placed into the spill on the water. Used pads and containment boom will be disposed in accordance with the recommendations of the Environmental Protection Agency. Page 3