Daily Landslide Observatory Report: March 29, 2026
1. USA: Drilling and Anchor Installation Begin at I-5 Bellingham Slide
Operations to stabilize the massive landslide south of Bellingham, Washington, have reached a critical geotechnical milestone today, March 29, 2026.
- The Operation: Following a week of “scaling” (manually removing loose surface rock), specialized drilling crews have begun setting anchors into the 80-foot cliff. These anchors will secure the heavy drilling equipment required for rock bolting—a process of “stapling” the fractured bedrock back into the stable mountain face with steel dowels.
- The Scale: WSDOT reports that the slide, which occurred on March 19, involved over 3,000 cubic yards of debris. The hazard is compounded by “bus-sized” boulders that remain unstable high on the slope.
- Risk Reduction: Engineers are utilizing expanding grout to break up boulders that are too large to move safely. There is still no estimated reopening date for northbound I-5, as crews must ensure the upper slope is fully secured before clearing the roadway below to prevent secondary collapses.
- More Info: WSDOT Official Project Page | WSDOT Blog Update
2. Tanzania: Rungwe District Death Toll Rises to 20 Amidst Continued Rain
Authorities in the Mbeya Region of southern Tanzania provided a grim update on March 27–28 following the devastating mudslides that struck earlier this week.
- The Impact: The confirmed death toll has risen to 20 people, with the majority being children (including a 1.5-year-old child). The landslide affected several wards, including Nkunga and Lupepo, burying homes and destroying agricultural livelihoods.
- Current Status: Search-and-rescue operations led by the Tanzania Red Cross Society and government fire teams are ongoing, though they are hampered by unstable ground and continued rainfall.
- Risk Alert: Meteorologists warn of more rainfall in the coming days. Local administrators have issued an urgent plea for residents in landslide-prone areas to evacuate immediately, as soil saturation levels remain critically high.
- More Info: Associated Press Report | ReliefWeb (ECHO Daily Flash)
3. Peru: Urubamba Province Landslide Kills Two Near Machu Picchu
A significant landslide triggered by “locally very heavy rainfall” occurred in southern Peru on March 22, with impact assessments continuing through March 25–29.
- The Event: A massive soil failure struck the Machu Picchu district in the Urubamba province (Cusco region) during the night.
- Impact: At least two fatalities have been confirmed, with an uncertain number of people affected. The slide damaged a bridge and blocked several critical roads serving the tourist-heavy region.
- Regional Context: This event is part of a wider disaster pattern linked to the Coastal El Niño, which has caused 92 deaths and displaced over 23,000 people across Peru since January.
- Risk Management: SENAMHI (Peru’s meteorological service) warns that more heavy rainfall is forecast over the next 96 hours for southern Peru, maintaining a high alert for further geohazards.
- More Info: ReliefWeb (ECHO Daily Flash)
Engineering Analysis: Rock Scaling vs. Rock Bolting
For your blog’s technical sidebar, it is worth noting the methodology used at the Bellingham (I-5) site. While “scaling” removes immediate loose hazards, “rock bolting” (or doweling) targets the kinematic instability of the larger rock mass. By drilling several meters into the stable bedrock and inserting steel rods, engineers increase the shear strength along the joint planes, effectively increasing the Factor of Safety ($F_s$) to a level that allows for safe public transit.