Peterhead Substation
Project Location:
Peterhead, Scotland
Client Name:
Scottish Hydro Electric Transmission Plc
Project Description:
Our teams constructed a Gas Insulated Switchgear (GIS) Substation under an NEC3 subcontract comprising a 2000m² portal frame building. In addition, we constructed two transformer buildings with supplementary foundations, a 210m x 150m platform and associated reinforced concrete structures for ancillary equipment.
Before commencement of the works, we improved internal and external access to the site for the delivery of plant and equipment. We supplied and installed all underground cabling containment with GRP covers at specified locations for easy access for the cabling installation teams.
Key Stats:
• 2000m² portal frame building
• 210m x 150m platform
• Two transformer buildings
• Access roads and highways
• Underground containment
86 Weeks
Duration
Challenge
• Earthworks/landscaping – located on a former 1970s substation, the project required the removal of multiple redundant power cables
• Unstable ground – the variable geotechnical ground conditions led to continual monitoring and testing to ensure load-bearing capacity requirements were achieved
• Excavated material – unsuitable for re-use
Solution
• For the platform works, we upfilled from sub-formation to platform level with 6F5 and Type 3 aggregate, and stone chipping with the specified resistivity
• Bound internal access roads inside the substation, and improvement works to the public highway to facilitate the delivery of key components
• Excavated material was landscaped into screening buds for drainage
Outcome
• Built and maintained cooperative working relationships with other contractors
• Daily communication to share the programme, project progress, and upcoming schedules
• Splitting the contract into two phases to create clear deadlines and prevent delays to the critical path of the project
• Clear and methodical programme of works to ensure interfaces with other contractors were easily managed
