Construction reaches 89% degree of completion

On the Construction pages you can follow the progress of a few key construction projects and installations at the Matinkylä-Kivenlahti section stations and on the rail line from the war room, including descriptions of completed installations and the monitoring of testing progress (in Finnish). One issue being monitored is the degree of completion, which was 89% in April. The degree of completion includes the construction and testing phases.

In April 2021, the degree of completion was 89%, which includes the ongoing Matinkylä-Kivenlahti section’s construction work and testing phase. The construction phase is taking place from 2019 to 2021. Construction of the stations, track and depot began in stages at the end of 2018.

Kivenlahti metro station. Photo: S. Toivola.

The degree of completion was added to the Construction pages (in Finnish) as a monitored factor in September 2020. The degree of completion has been monitored in the war room from the start of the construction contracts. On the Construction pages, the progress of the construction work and installations has been monitored since March 2020. Of the monitored construction work and installations, the installation of the substations, standby generators, smoke extraction fans, escalators, WC modules, fire shutter doors and sliding doors and the installation of the superstructure contract’s sleepers, rails and switches have been completed since then.

In addition to the construction phase, the degree of completion includes the testing phase, which has already started on the Matinkylä-Kivenlahti section with point testing. Systems testing will ensure that all of the 52 different systems installed in the West Metro function safely and as planned under all conditions. The systems testing will begin with point testing on single components and progress to the testing of larger entities, such as functions, systems and stations, as well as testing between stations and testing of the entire metro infrastructure. The testing phases will be discussed in separate articles as testing progresses.

The project’s progress is measured using the earned value method, in which factors are weighted based on their value in euros. For example, if one side of a four-sided fence costing EUR 4,000 has been completed, the earned value is EUR 1,000 and the degree of completion is 25% (1000 €/4000 € x 100% = 25%).

Degree of completion 100% when all contracts are completed

The monitored degree of completion will be 100% when all the contracts are completed. A contract has finished when the contractor hands the work over to the customer, i.e. Länsimetro, and Länsimetro accepts it. The degree of completion is currently very high, at close to 90%, as most of the construction work is completed and there is still testing work to be done. This progress, the final few per cent, will be monitored separately in the commissioning phase’s schedules.

Testing, and the resulting authority inspections, will continue until 2023. The joint local authority Helsinki Region Transport (HSL) will decide when metro traffic can begin. It has been estimated that commuter traffic from Matinkylä to Kivenlahti will begin during 2023. After construction, Länsimetro Oy will remain the owner and developer also of the new metro section. Länsimetro Oy’s task is to build, own, maintain and develop the West Metro system, tracks and stations from Ruoholahti westwards.