Case Studies

Trench Control recently completed a piling project on behalf of L & M Keating at Greenore Co. Louth. The project involved the construction of a roll on roll off dock for the new Greenore to Greencastle ferry, a €10m project. TCL drove 60 no. sheet piles up to 11.0m in depth to form a cofferdam, as well as 22 no. standalone tubes of up to 22.0m depth. The tidal range and strong currents presented technical challenges as well as requiring

Client: EPS Pumping and Treatment Systems Services: Temporary works design, supply and installation of ground support system The Carbery/Muskerry Wastewater Treatment Plants DBO (design, build and operate) and O&M (operate and maintain) Contract for €6million is primarily a contract to carry out upgrade works to the existing wastewater treatment plant in Clonakilty, providing a treatment capacity of 20,500PE (population equivalent). Working for EPS, Trench Control designed and installed cantilever (unpropped) sheet piles for a 5m approximate retained height for the

Client: Siac Services: Temporary works design, supply and installation of ground support system The rapid growth of Galway city and environs now means that the existing Mutton Island Wastewater Treatment Plant is nearing design capacity and with growth projected to continue, there is a requirement to increase its capacity to cater for both residential and industrial expansion within the catchment area. TheMutton Island Wastewater Treatment Plant, completed in 2003, was designed to cater for 91,600 population equivalent. The upgrade works involve a design and build

Client: Farrans Services: Temporary works design, supply and installation of ground support system The current outfall arrangement involves final effluent being pumped from a tidal pump house at the west of the works via a 1200mm diameter glass reinforced plastic (GRP) pipe which passes beneath a sea defence bund. From this point the outfall continues as a cast iron pipe to the outfall headwall. The proposed replacement outfall runs generally parallel to the sea defence wall for a distance of approximately 1400m from where

Client: Bam Contractors Services: Temporary works design, supply of ground support system County Kildare’s population has increased dramatically since 2006 and Kildare is now the 4th most populous county in the Republic. Consequently, an application to the DoEHLG was been submitted by Kildare County Council for a Stage III upgrade to the Osberstown facility to 130,000 population equivalent (from 80,000 p.e.). The new works will facilitate predicted future increases in wastewater flows from an expanding domestic, industrial and commercial population. In addition, the state of

Client: Wills Bros. Services: Temporary works design, supply and installation of ground support system Youghal is situated on the Blackwater Estuary, which is environmentally sensitive and an area of significant recreational activity. The town has a population of 6,990 (2011 Census) but this can increase to 14,000 in the summer months with an influx of tourists and daytrippers. However, the town currently has no wastewater treatment plant and all wastewater currently discharges directly to the Blackwater Estuary with no treatment. The Main Drainage Scheme

Client: Terra Solutions Services: Temporary works design, supply of ground support system The Lower Liffey Valley Sewerage Scheme Wastewater Treatment Plant Upgrade aims to upgrade the existing Leixlip WWTP from 80,000 population equivalent to its ultimate capacity of 150,000. The WwTP expansion is required to accommodate predicted future increases in wastewater flows up to a population equivalent of 150,000 PE from an expanding domestic, industrial and commercial population. The proposed WwTP expansion will provide secondary and tertiary treatment with nutrient removal. The WwTP will

Client: Clonmel Enterprises Services: Temporary works design, supply and installation of ground support system The new M9 Services began work in 2013 and involved significant earthworks and a new motorway crossing. The bridge superstructure comprises bankseat abutments and piers. Owing to a significant depth of soft ground the pier foundations were founded at depth below the existing motorway level. The soft material was required to be removed to find a suitable formation for the piers and so temporary ground support was required to form

Client: Siac / Aecom Services: Temporary works design, supply and installation of ground support system Since completion of the Phase 1 expansion works in 2003, growth in the Swords catchment has outstripped the treatment works’ current capacity, causing it to operate above its maximum design of 90,000 population equivalent. The Phase 2 expansion and upgrading the treatment plant aims to reduce the level of pollutants discharging to the receiving water (the inner Broadmeadow estuary) and to allow capacity for the growing population and projected commercial

Client: Source Civil Services: Temporary works design, supply and installation of ground support system Part of a €3.6million scheme incorporating Freshford, Johnstown and Goresbridge, Response Group (parent of Source Civil) were appointed by Kilkenny Co. Co. as the main contractor to design, build and operate new wastewater infrastructure for the villages of Freshford, Johnstown and Goresbridge. The treatment plants will be designed to treat 1300, 800 and 600 PE respectively. Working for Source Civil, Trench Control designed and installed a

Client: EPS Pumping and Treatment Systems Services: Temporary works design, supply and installation of ground support system The Carbery/Muskerry Wastewater Treatment Plants DBO (design, build and operate) and O&M (operate and maintain) Contract for €6million is primarily a contract to carry out upgrade works to the existing wastewater treatment plant in Clonakilty, providing a treatment capacity of 20,500PE (population equivalent). It also includes the construction of a storm water retention tank and upgrade works to the existing Pumping Station at

Client: John Cradock Ltd. Services: Geotechnical and dewatering analyses For the River Nore crossing on the Central Access scheme, it is proposed to construct a concrete bridge which spans two mid-stream piers between east and west abutments. The pier piles and pilecap are founded at a level well below existing bed level and so a temporary works scheme is required in order to facilitate construction of the bridge piers. Trench Control carried out the geotechnical numerical analysis of the proposed