Ministry of Transportation & Infrastructure Updates – 2020 Old Fort Landslide

2020 Landslide Event – Access Completion

July 17, 2020 news release from the Ministry of Transportation and Infrastructure

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MoTI Updates

Old Fort Slide Photographs

July 2, 2020 – shows the movement of the slide, over several days, captured with LiDAR photography.
https://prrd.wistia.com/medias/8m7eaaf2zb
June 2020 – Old Fort Slide Progression
https://www.flickr.com/photos/tranbc/albums/72157714783525436
June 29, 2020
June 26, 2020
June 25, 2020
June 22, 2020

Update Archive

July 9, 2020

Update:

  • Slide moving at negligible rates on the road.
  • The instrumentation on-site is providing accurate measurements to technical staff.
  • Work continues on the Old Fort temporary access road.
  • Timeline for opening is weather dependent but crews are hopeful that residents will have access before the weekend.
  • Traffic control will be in place 24/7 once the temporary road is opened.

Background:

  • Old Fort Road remains closed to all traffic until further notice.
  • The ministry detected localized ground movement on Old Fort Road on Thursday, June 18, 2020, at approximately 7 p.m. There remains no ground movement detected near residents.
  • Construction equipment, maintenance contractor staff, and ministry technical staff remain available and assessments are ongoing.
  • The slide on Old Fort Road is not safe for the public to cross. The slide continues to adjust to on-going changes and although the movements are currently slowing, it is not possible to continuously monitor and report all site changes and that makes the slide unsafe for the public to cross.
  • The landslide has moved a 100-metre section of Old Fort Road approximately 300m downslope since the event started Thursday, June 18th.

Old Fort Road – Daily Update – July 9

July 3, 2020

Update:

  • The instrumentation on-site is providing accurate measurements to technical staff.
  • With an anticipated heavy rainfall continuing Friday, July 3 and into Saturday, July 4, MOTI staff and technical experts will continue to monitor during and following this event for slide activity or any new movement.
  • Ponding and flowing water in the Eastern crevice of the slide will continue to be monitored.
  • We will construct temporary access for the residents of Old Fort as soon as possible.

Background:

  • Old Fort Road remains closed to all traffic until further notice.
  • The ministry detected localized ground movement on Old Fort Road on Thursday, June 18, 2020, at approximately 7 p.m. There remains no ground movement detected near residents.
  • Construction equipment, maintenance contractor staff, and ministry technical staff remain available and assessments are ongoing.
  • The slide on Old Fort Road is not safe for the public to cross. The slide continues to adjust to on-going changes and although the movements are currently slowing, it is not possible to continuously monitor and report all site changes and that makes the slide unsafe for the public to cross.

Old Fort Road – Daily Update – July 3

July 2, 2020

Update:

  • The landslide has moved a 100-metre section of Old Fort Road approximately 300 m downslope since the event started Thursday, June 18th.
  • Slide moving at negligible rates at the road; the movement had continued to slow with previously drier conditions.
  • The instrumentation on-site is providing accurate measurements to technical staff.
  • With an anticipated heavy rainfall between Thursday, July 2 and Friday, July 3, MOTI staff and technical experts will continue to monitor during and following this event for slide activity or any new movement.
  • Ponding and flowing water in the eastern crevice of the slide will continue to be monitored.
  • We will construct temporary access for the residents of Old Fort as soon as possible.

Background:

  • Old Fort Road remains closed to all traffic until further notice.
  • The ministry detected localized ground movement on Old Fort Road on Thursday, June 18, 2020, at approximately 7 p.m. There remains no ground movement detected near residents.
  • Construction equipment, maintenance contractor staff, and ministry technical staff remain available and assessments are ongoing.
  • The slide on Old Fort Road is not safe for the public to cross. The slide continues to adjust to on-going changes and although the movements are currently slowing, it is not possible to continuously monitor and report all site changes and that makes the slide unsafe for the public to cross.

Old Fort Road – Daily Update – July 2

June 30, 2020

Update:

  • The landslide has moved a 100-metre section of Old Fort Road approximately 300m downslope since the event started Thursday, June 18th.
  • Slide moving at negligible rates at the road; movement has continued to slow with drier conditions.
  • The instrumentation on-site is providing accurate measurements to technical staff.
  • With an anticipated heavy rainfall between Wednesday, July 1 and Thursday, July 2, MOTI staff and technical experts will continue to monitor during and following this event for slide activity or any new movement.
  • We will construct temporary access for the residents of Old Fort as soon as possible.

Background:

    • Old Fort Road remains closed to all traffic until further notice.
    • The ministry detected localized ground movement on Old Fort Road on Thursday, June 18, 2020, at approximately 7 p.m. There remains no ground movement detected near residents.
    • Construction equipment, maintenance contractor staff, and ministry technical staff remain available and assessments are ongoing.
    • The slide on Old Fort Road is not safe for the public to cross. The slide continues to adjust to on-going changes and although the movements are currently slowing, it is not possible to continuously monitor and report all site changes and that makes the slide unsafe for the public to cross.

Old Fort Road – Daily Update – June 30

June 29, 2020

Update:

  • The landslide has moved a 100-metre section of Old Fort Road approximately 300m downslope since the event started Thursday, June 18th.
  • Slide moving at 0.1m/hr at the road; movement has remained at a similar rate over the past 24 hours.
  • The instrumentation on-site is providing accurate measurements to technical staff.
  • With the implementation of the water taxi between Old Fort and Peace Island Park to provide consistent access to residents, the Ministry of Transportation & Infrastructure’s Maintenance Contractor will be removing on-site equipment until such time a road can be constructed.

Background:

  • Old Fort Road remains closed to all traffic until further notice.
  • The ministry detected localized ground movement on Old Fort Road on Thursday, June 18, 2020, at approximately 7 p.m. There remains no ground movement detected near residents.
  • Construction equipment, maintenance contractor staff, and ministry technical staff remain available and assessments are ongoing.
  • The slide on Old Fort Road is not safe for the public to cross. The slide continues to adjust to on-going changes and although the movements are currently slowing, it is not possible to continuously monitor and report all site changes and that makes the slide unsafe for the public to cross.

Old Fort Road – Daily Update – June 29

June 26, 2020

Update:

  • The landslide has moved a 100-metre section of Old Fort Road approximately 235m downslope since the event started Thursday, June 18th.
  • Slide moving at 0.8m/hr at the road; movement has slowed slightly in the past 24 hours
  • The instrumentation on-site is providing accurate measurements to technical

Background:

  • Old Fort Road remains closed to all traffic except emergency vehicles until further notice.
  • The ministry detected localized ground movement on Old Fort Road on Thursday, June 18, 2020, at approximately 7 p.m. There remains no ground movement detected near residents.
  • Construction equipment, maintenance contractor staff, and ministry technical staff remain on-site and assessments are ongoing.
  • The slide on Old Fort Road is not safe for the public to cross. The slide continues to adjust to on-going changes and although the movements are currently slowing, it is not possible to continuously monitor and report all site changes and that makes the slide unsafe for the public to cross.

Old Fort Road –  MOTI Daily Update – June 26

June 25, 2020

The Ministry of Transportation and Infrastructure provided an update on the Old Fort Landslide:

  • The slide on Old Fort Road is not safe for the public to cross. The slide continues to adjust to on-going changes and although the movements are currently slowing, it is not possible to continuously monitor and report all site changes and that makes the slide unsafe for the public to cross.
  • The landslide has moved a 100-metre section of Old Fort Road approximately 235m downslope since the event started Thursday, June 18th.
  • Slide moving at 1.0m/hr at the road; movement has slowed somewhat in the past 24 hours
  • The instrumentation on-site is providing accurate measurements to technical staff.

A temporary road was constructed to install signage that advises the public of the dangers of crossing the slide.

    • The Ministry is unable to provide the public with safe and reliable access across the slide.
    • The Old Fort Slide is moving at approximately 1 metre per hour.
    • The temporary road has already moved downslope with the slide.
    • The Ministry advises the public that it is unsafe to cross the slide.

Background:

    • Old Fort Road remains closed to all traffic except emergency vehicles until further notice.
    • The ministry detected localized ground movement on Old Fort Road on Thursday, June 18, 2020, at approximately 7 p.m. There remains no ground movement detected near residents.
    • Construction equipment, maintenance contractor staff, and ministry technical staff remain on-site and assessments are ongoing.
    • The slide on Old Fort Road is not safe for the public to cross. The slide continues to adjust to on-going changes and although the movements are currently slowing, it is not possible to continuously monitor and report all site changes and that makes the slide unsafe for the public to cross.

June 22, 2020

The Ministry of Transportation and Infrastructure provided an updated map of the Old Fort Landslide, as well as some aerial photos. MOTI stated that:

  • The back scarp at the top of the slide has dropped 9.2 m since the slide re-initiated, most of the movement has been on the last day.
  • Scarp below the area of where previous gravel stockpiles were has moved towards the back scarp 5 to 15 m and the material is slumping down onto the earthflow part of the slide.
  • The area of the slide around where Old Fort Road was/is has been moving at approximately 2 m per hour since last night (June 21, 2020) at 10 pm.
  • The ridge has movement on the front (south), east and north sides.
  • The portion of the ridge that broke off in 2018 is moving.
  • The GPS instruments have not been sending data to the base station since yesterday (June 21, 2020) at around 9 am.  MOTI is working with Leica (supplier of the units) to remedy this.

Old Fort Landslide – June 22, 2020

June 21, 2020

Due to the surficial movement of material on the slope effecting 7711 and 7605 on Old Fort Loop, residents are asked to park to the west of this area. Please look for the no parking signs to identify the safe area to park. No one should be walking on the existing road north of the outhouses.

The Ministry of Transportation & Infrastructure is leading the assessment of the landslide and currently has a GeoTech on-site, and will be providing updates about this.

Residents are asked to report any signs of slide movement or incidents to the local maintenance contractor, Dawson Road Maintenance Ltd., who can be reached 24/7 at its emergency line: 1-800-842-4122.

Ministry of Transportation & Infrastructure’s Geotech has provided a technical briefing regarding the landslide, as well as an updated orthophoto (below).

    • Back Scarp (Top of the Slide) – This is the furthest extent that the slide moved up the valley slope in 2018 and it is the same in 2020 and the height of the scarp is approximately 10 m. The movement to date this year is approximately 0.3 m.
    • Rotational Slide – the top part of the slide north of what is labelled the “scarp” and includes the area where the gravel stockpiles were in 2018 and is the area where the slide mass is rotating.
    • Scarp – an approximately 50 m high near-vertical slope below the area where the gravel stockpiles were in 2018.  It is also the boundary where the slide changes from a rotational failure to a flow slide failure.
    • Ridge – a bedrock ridge that is on the eastern edge of where the slide is currently moving.  The GPS monitor on the ridge is showing approximately 6 cm of movement.
    • Flow Slide – the portion of the slide that is flowing like a very slow-moving stream.  This is the part of the slide that has moved the most since re-initiating this year.  It has moved 80 to 100 m.

Old Fort Landslide Map – June 21, 2020

June 20, 2020

The Old Fort Road is closed until further notice.

MOTI Traffic Advisory – June 20, 2020 

June 19, 2020

1930 hrs Update: The Old Fort Road will be closed at 9:00 pm June 19th.  An update on the road will be issued by MOTI on Drive BC at 8:00 am June 20th.

1500 hrs Update: Please see the Transportation Advisory from the Ministry of Transportation regarding Old Fort Road.

MOTI Traffic Advisory – June 19, 2020

As of 10:00 AM provided by the Ministry of Transportation & Infrastructure  – The Ministry of Transportation and Infrastructure (MOTI) is continuing to evaluate the road and will be releasing more information when they have it available. The PRRD will share this update once it has been released. For information on road conditions check Drive BC and the Ministry’s Facebook and Twitter.  For further information about roads, please contact Dawson Road Maintenance – North Peace: 250-262-2600 or 1-800-842-4122.

The Ministry detected localized ground movement on the Old Fort Road late in the evening on June 18, 2020, at approximately 7 pm, and closed Old Fort Road overnight as a precaution. There was no movement detected near residents.

Old Fort Road is now open for short periods of time to allow local traffic and essential services through while ministry technical staff assess the road and crews make subsequent repairs.

Since the landslide in 2018, an automated monitoring system has been onsite at Old Fort to provide continuous updates on any ground movements in the area, and an operating protocol is in place to respond appropriately.

Residents are asked to report any signs of slide movement or incidents to the local maintenance contractor, Dawson Road Maintenance Ltd, which can be reached 24/7 at its emergency line: 1 800 842-4122.

People are reminded to check @DriveBC on Twitter or: www.DriveBC.ca for updates

June 18, 2020

Issued by the Ministry of Transportation at 11:55 pm:

  • The Old Fort Road has been impacted by soil movement which appears to be localized around the road based on observed cracking and ground movement. This has also been confirmed with GPS monitoring data.  There is currently no indication of larger-scale movement based on the same GPS monitoring data.
  • To keep road users safe, the road will be closed until a geotechnical assessment is completed. Geotech is travelling to the site for assessment first thing in the morning.
  • Next update at 10:00 AM, June 19th

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  • Upon further assessment, the Ministry will advise the Peace River Regional District whether the Old Fort Emergency Plan needs to be activated.
  • Existing evacuation orders and evacuation alerts remain in effect.  No new evacuation orders or alerts have been issued. Only emergency responders may enter the evacuation order areas.

For information on road conditions check Drive BC.  For further information please contact the District office at 250 787-3237.

Follow Dawson Road Maintenance on Facebook for updates.

Sign up for Northeast BC Emergency & Public Alerts to stay updated on emergency events in your area.

PRRD Emergency Plan- Old Fort Area V4