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SFA Start / Areas and impact / Establishment zones / Smedslätten

Smedslätten

Smedslätten
At the sledging hill south of Alviksvägen, we have an establishment area while we build the sewer tunnel. The establishment will remain on the site until 2026.

Smedslätten establishment zone

The establishment zone at the foot of the sledging hill in Smedslätten (see map) is fenced in during the tunnel construction. 

Working hours

Our working hours are weekdays at 7-22, when we drill, blast and perform other work on the establishment. Silent work (below 30 dBA) may also occur at other times. In cases where night work is in progress, it takes place completely inside the tunnel and should not disturb the surroundings.

Noise from the construction establishment

The Swedish Environmental Protection Agency has guidelines (NFS 2004: 15) for how much disturbing noise it may come from construction sites, and we follow these when we build the sewer tunnel. If you are affected by disturbing noise over the Swedish Environmental Protection Agency's guidelines, you can, if necessary, have access to a replacement home.

Read more about disturbing noise and the possibility of replacement housing

Schedule

  • 2020: The establishment is built. Blasting work begins.
  • 2021: The tunnel is blasted out to Lake Mälaren. The Mälar Passage is being built.
    The chimney in Ålstensskogen is being built, and will be ready in the summer of 2022.
  • 2023: The tunnel is blasted north to Höglandet, and south halfway below Lake Mälaren where it meets the tunnel that was blasted from Eolshäll. No more rock transports take place from the establishment. Concrete work continues.
  • 2023-2025: Concrete and pipe work in the Mälar Passage
  • 2026: Testing and commissioning, as well as work with tunnel mouth / portal. When the tunnel is completed, the area will be restored in consultation with the landowner.
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Follow our progress – Interactive web map

Karta som visar Smedslätten och Ålsten och en röd markering där sprängningar sker.
On our interactive map you can see how far we have come in our work with the sewer tunnel and get forecasts for when we plan to work close to you.
Click on the link and select the Avloppstunneln tab. Zoom and click on the map for detailed information.

Interactive map

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Blasting

When we build the tunnel, those who live nearby can hear noise from blasting and drilling.

Sometimes an air shock is heard like a sharp bang, and for others it is felt more like a rumble and vibrations from the ground. We blast up up to twice a day at each tunnel front.

When we blast, we adapt the intensity of the blasting to the surroundings and we have meters set up in several places around the area where we measure vibrations and air shocks to see that we do not exceed any guideline values.

Blast warning via text message

You can receive notifications via text message about 30 minutes before we blast in the sewer tunnel.

Notification of explosion warning

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Transportation

Click on the picture to enlarge

 

We will need to remove rock spoil from the site during the construction period, which means that trucks will be travelling to and from the establishment zone. The transport route from Smedslätten is indicated on the map and travels northwards towards Drottningholmsvägen via Alviksvägen.

Number of transport movements per day during the construction period. Click on the diagram to enlarge

A "transport movement" is a one-way truck journey.

Read more about transports and traffic

 

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Smedslätten ventilation flue

We plan to build a 30 metre high chimney in the woods in Smedslätten to vent air from the section of tunnel called the Bromma Tunnel (from Åkeshov to the Lake Mälaren stretch). Malodorous compounds in the air will be cleansed by photo oxidation and activated carbon filters and then released via the chimney. The air released will be odour-free. The chimney will have an external diameter of about 1.4 metres.

The image present a montage of what the chimney can look like, seen from the woods and also from the water. The lower section will be finished in dark brown to match tree trunks and white at the top to blend in with the sky. In the image above, the chimney colour has been heightened with grey to render it visible.

Air from the south suburbs tunnel from the Lake Mälaren stretch to Sickla) will be vented in an existing chimney (80 metres high) in Sickla.

The chimney is being built during 2021-2022.

Additional information
  • Map
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Smedslätten ventilation flue
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Tunnel route, Bromma

Here is a detailed map of the Bromma tunnel route.

Click on the map to enlarge it (PDF).

Tip: You can zoom into the map in the PDF tool to view the tunnel route up close.

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Further reading

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