Celtic Energy
Project: Celtic Pipeline – Design and Planning
Client: Celtic Energy
Date:  1999 – to date

Conceptual design, Planning and overall system development for a terrestrial and sub-sea pipeline from Ecclestone Ferry (Chester) via Abergele to Dublin to various proposed Power Stations in the East Region. The pipeline was based on a 24” / 148 bar sub-sea pipeline with an Off-Take Station at Eccleston Ferry, Compressor Stations at Abergele and North Dublin, and a Shore Station at Donabate

Celtic Energy
Project: Celtic Pipeline – Feasibility Study
Client: Celtic Energy
Date: 1999 – to date

Landfall design and on-shore pipeline (30”/85 bar), routing over 30km from the coastline in north Dublin to a proposed gas fired Power Station at Woodlands. This element of the project included site selection, platform levels and access roads for a 2 no. 400 MW station, together with participation with El Paso International in the Power Station layout, base-line studies and assessment of infrastructural framework.

• Offtake on the British Gas Transmission System at Moffat Compressor Station.
• An 80km 30” pipeline in Scotland, extending from Moffat to the Solway Coast at Brighouse Bay.
• An 18MW Compressor Station at Brighouse Bay with a capacity to deliver gas at 148 barg (2,200 psi).
• A 205km 24” Subsea Pipeline from the Solway Coast to Loughshinny, near Skerries, in North County Dublin.
• A Pressure Reduction/Metering Station on the Irish Coast and an 8km 30” pipeline from Loughshinny to bord Gais Eireann’s National Transmission System at Ballough.

Sub-Sea Pipeline
Project: Gas Interconnector Sub-Sea Pipeline
Client: Bord Gais Eireann
Date: 1991 - 1993
The Subsea Pipeline is 24” in diameter and is designed for 148 barg, It traverses three Jurisdictions and is laid in sea bottom conditions ranging from sand waves and soft clays to hard till and boulder clays.
The Subsea pipeline was laid in a 54-day period from 1st March 1993 to 23rd April 1993. The water depth ranged up to 110 metres and the Laybarge DLB 1601 achieved a World Record for daily pipelay of 24” subsea pipe with 6,048 metres on 14th April 1993.

Lengths of Pipeline by Jurisdiction:
Irish Waters                   61.9km
Isle of Man Waters         76.4km
U.K. Waters                   65.6km
The subsea pipeline was commissioned in November 1993 with North Sea Gas flowing at Loughshinny.

Compressor Station
Project: Compressor Station Brighouse Bay
Client: Bord Gais Eireann
Date: 1993 - 1994

The Compressor Station at Brighouse Bay in Scotland comprises 3 No. 6 MW Gas Turbines with Thermodyn Compressor Sets. The Turbo compressor Units are designed to be operated in series and parallel mode allowing for gas compression up to 148barg. The Station has provision for future expansion in terms of a further two Turbo-Compressor Units.
 
The station is also equipped with Fiscal Flow Meters, Gas Scrubbers, Fuel Gas Skid, Fin Fan Coolers, Lube Oil Coolers, Air Intake Filters, Emergency Generators, Demineralised Water System and a Fire Water Ring Main. The turbo Compressor system is equipped with state of the art High Integrity Protection System and Emergency Shut Down System.
 
The Works involved the excavation of 75,000 cubic metres of rock, the construction of a Compressor Building, Administration Block and a Services Building, together with the installation and commissioning of all equipment, associated pipework and infrastructure.

PROVIDENCE RESOURCES
Project: Multi Phase Pipeline
Client: Providence Resources
Date: 1998 - 1999

Feasibility study and Preliminary Engineering Design for a multi-phase flow pipeline from the Helvic and Ardmore Fields to Whitegate including inshore pipeline study, Landfall selection, and terrestrial pipeline routing from the selected location at Youghal Bay to Whitegate.

Project: Cork Dublin Natural Gas pipeline
Client: Bord Gais Eireann
Date: 1981 - 1983

The Cork-Dublin Gas Pipeline forms the spine of the Irish National Gas Transmission Network. Mr. McMahon was appointed in 1981 to review the design and Tender documents. He was subsequently responsible for evaluation of Tenders and for appointment of the Contractor (15th October 1981).   As Engineer / Project Manager on behalf of Bord Gais Eireann he was responsible for the overall project which included an Offtake at Lochcarrig Lodge in Cork, a metering/ pressure reduction station at Brownsbarn to the south of Dublin and 220km of 18"/70 barg pipeline, involving 175 road crossings, 21 river crossings, 5 rail crossings and 587 land holdings. The 220km pipeline was constructed in a single season and was commissioned on 16th Dec. 1982. Reinstatement was completed in 1983.