Construction, Maintenance and Replacement of Gas Distribution mains and Services – Southern Gas Networks

Description

Southern Gas Networks plc (‘SGN’) are a gas distribution utility regulated by the Office of Gas and Electricity Markets (‘Ofgem’). SGN is seeking experienced suppliers to assist the delivery of a range of regulatory outputs and related works predominantly over the period 2021 to 2026 with the option for a further 2 extension periods of up to 12 months each. The primary works activity will be the policy abandonment and replacement of underground cast iron gas mains and steel service pipes. The majority of the mains to be abandoned and renewed will be in the diameter range 3” to 8” with a significantly smaller quantity in the diameter range 9” – 12”. The mains are located in predominantly urban locations including London (South of the River Thames), the South and South East of England and operate at pressures up to 2 bar. Lot 1: South — Oxfordshire, Berkshire, Surrey, Hampshire, Dorset and West Sussex SGN are seeking experienced suppliers to assist SGN with the delivery of a range of Ofgem regulatory outputs predominantly over the GD2 period (2021 to 2026). The primary works activity will be the policy abandonment and replacement, with polyethylene pipework, of underground cast iron gas mains and steel. Service pipes across the South and South East of England. The majority of the cast-iron mains to be abandoned and renewed will be in the diameter range 3” to 8” (referred to as ‘Tier 1 Mains’) with a significantly smaller quantity in the diameter range 9” – 12” (‘Tier 2 Mains’). The mains are located in predominantly urban locations and operate at pressures up to 2 bar. Most replacement mains will be constructed using live or dead mains insertion techniques in order to reduce reinstatement costs and increase productivity. The works will also include pricing options for open cut mainlaying. In addition to the primary works activities detailed above, the framework agreement will include the following secondary works activities which typically account for 5 % - 15 % of the total annual workload: • replacement of steel mains and services due to their condition (non-policy mains replacement); • diversion of mains and services at the request of a third party up to 355 mm diameter; • construction of new reinforcement mains to increase the capacity of the network up to 355 mm diameter. Suppliers will be required to provide experienced and competent resources to safely deliver the primary works annual policy mains replacement works target and an element of the secondary works. The supplier will as a minimum be required to supply management, supervision resource management, traffic management, main laying, service laying reinstatement and meter works. SGN will undertake or provide the role of the CDM principal designer and is seeking suppliers who will undertake and deliver the roles and responsibilities of a CDM principal contractor or CDM contractor and provide a fully managed service to SGN, including but not limited to pre-construction surveys, works scheduling, material ordering, customer liaison, stakeholder engagement, supervision and management of all on site resources, SHE management and auditing. As such, SGN will be seeking safety conscious suppliers with experience and competence in mains and service replacement works in a street work environment. Lot 2: London SGN are seeking experienced suppliers to assist SGN with the delivery of a range of Ofgem regulatory outputs predominantly over the GD2 period (2021 to 2026). The primary works activity will be the policy abandonment and replacement, with polyethylene pipework, of underground cast iron gas mains and steel. Service pipes across the South and South East of England. The majority of the cast-iron mains to be abandoned and renewed will be in the diameter range 3” to 8” (referred to as ‘Tier 1 Mains’) with a significantly smaller quantity in the diameter range 9” – 12” (‘Tier 2 Mains’). The mains are located in predominantly urban locations and operate at pressures up to 2 bar. Most replacement mains will be constructed using live or dead mains insertion techniques in order to reduce reinstatement costs and increase productivity. The works will also include pricing options for open cut mainlaying. In addition to the primary works activities detailed above, the framework agreement will include the following secondary works activities which typically account for 5 % - 15 % of the total annual workload: • replacement of steel mains and services due to their condition (non-policy mains replacement); • diversion of mains and services at the request of a third party up to 355 mm diameter; • construction of new reinforcement mains to increase the capacity of the network up to 355 mm diameter. Suppliers will be required to provide experienced and competent resources to safely deliver the primary works annual policy mains replacement works target and an element of the secondary works. The supplier will as a minimum be required to supply management, supervision resource management, traffic management, main laying, service laying reinstatement and meter works. SGN will undertake or provide the role of the CDM principal designer and is seeking suppliers who will undertake and deliver the roles and responsibilities of a CDM principal contractor or CDM Contractor and provide a fully managed service to SGN, including but not limited to pre-construction surveys, works scheduling, material ordering, customer liaison, stakeholder engagement, supervision and management of all on site resources, SHE management and auditing. As such, SGN will be seeking safety conscious suppliers with experience and competence in mains and service replacement works in a street work environment. Lot 3: Kent, South Downs, East Surrey SGN are seeking experienced Suppliers to assist SGN with the delivery of a range of Ofgem regulatory outputs predominantly over the GD2 period (2021 to 2026). The primary works activity will be the policy abandonment and replacement, with polyethylene pipework, of underground cast iron gas mains and steel Service pipes across the South and South East of England. The majority of the cast-iron mains to be abandoned and renewed will be in the diameter range 3” to 8” (referred to as ‘Tier 1 Mains’) with a significantly smaller quantity in the diameter range 9” – 12” (‘Tier 2 Mains’). The mains are located in predominantly urban locations and operate at pressures up to 2 bar. Most replacement mains will be constructed using live or dead mains insertion techniques in order to reduce reinstatement costs and increase productivity. The works will also include pricing options for open cut mainlaying. In addition to the primary works activities detailed above, the framework agreement will include the following secondary works activities which typically account for 5 % - 15 % of the total annual workload: • replacement of steel mains and services due to their condition (non-policy mains replacement); • diversion of mains and services at the request of a third party up to 355 mm diameter; • construction of new reinforcement mains to increase the capacity of the network up to 355 mm diameter. Suppliers will be required to provide experienced and competent resources to safely deliver the primary works annual policy mains replacement works target and an element of the secondary works. The supplier will as a minimum be required to supply management, supervision resource management, traffic management, main laying, service laying reinstatement and meter works. SGN will undertake or provide the role of the CDM principal designer and is seeking suppliers who will undertake and deliver the roles and responsibilities of a CDM principal contractor or CDM contractor and provide a fully managed service to SGN, including but not limited to pre-construction surveys, works scheduling, material ordering, customer liaison, stakeholder engagement, supervision and management of all on site resources, SHE management and auditing. As such, SGN will be seeking safety conscious suppliers with experience and competence in mains and service replacement works in a street work environment.