I 5 Rock Slide South of Bellingham Covered by Cascadia Weekly

Annie Todd at Cascadiadaily did a write up on the landslide that blocked the north bound lanes of Interstate 5 south of Bellingham. The article includes a very good picture of the slide via a drone shot image by Finn Wendt. Annie alerted me to the slide via email and wanted to know if I had any info; hence, some quotes in the article. 

I have not done any work on this slide, but I am familiar with the site having driven past it many times. I did a quick look at the DOT site and was fairly sure of the site.  

My very first vist to Bellingham before living there I had to drive around a car sized boulder that had come off the road cut very near where this recent failure took place. The road cut for the interstate is into Chuckanut Formation. The bedrock layers are dipping into the slope, but joints within the sandstone are very susceptible to failures and this cut slope has a long history of rocks breaking off of the slope along the large joint sets. The Department of Transportation cut this slope back substatially in the past and created a slide/rockfall collection zone at the base of the slope and installed bolts on portions of the slope to reduce the scale of the failures. In the image of the article, it appears that most, if not all the rock was contained within the area outside the travel lanes, but the trees on top of the failures extened out into the travel lanes. Given the size of the bedrock blocks, removal and clearing will be a bit tricky from a safety perspective.

On a final note, I greatly appreciate Cascadia Weekly. Local news coverage is critical and they do a good job for the northwest corner of Washington. 

Northwest Washington Spring

Winter in northwest Washington is a bit hard to define. It is a transition between fall and spring with periodic short spells of very cold weather. Some years such as this year there are no cold spells of note. The chances of a cold spell this late are pretty remote. Late Monday the weather shifted from chilly wet to mild and wet. No more 32 to 40 degree days with a mix of rain and snow in the lowlands. 

I headed east of the mountains on Tuesday. Rain on the mountain pass and saw 72 degrees on the dashboard while heading down the Yakima Valley. 

Two indicators of Spring on the west side of the mountains are the native skunk cabbage and non native daffodils. Give then a short warm spell in March and they bloom. 

Skunk cabbage in swampy ground near Lamb Creek on the Olympic Penisula

Daffodils on the Skagit delta  

Journey Home, the Trench, Fraser River, West of the Straight Creek-Fraser River Fault

 I previously noted the Rocky Mountain Trench while returning home from a previous trip this past year (rocky-mountain-trench-rivers). With fog in the Trench and the valleys and snow on covering the high ground above tree line the view was enhanced as I flew over the Trench.

Upper Fraser River in front of engine flowing towards the Trench. 

The Fraser flows north along the Trench towards the top of the picture

The Trench with the fog shrouded Canoe River in front of engine.

The Canoe River flows within the Trench south towards the lower left in the image. 

The lower Canoe River is now a lake as a result of the Mica Dam on the Columbia.

The foggy valley past the trench include the Canoe River, but further to the west (left) is the Thompson River. I am crossing Thompson's path again on this trip (crossing-david-thompsons-early-days).

Getting a sense of the scale of the Trench

The Fraser River flows north along the Trench, but then leaves the Trench and turns to the south.

The Freaser River canyon cutting through the BC Coast Range.

The canyon through the Coast Range follows the strike of the Straight Creek-Fraser River Fault. 

The fault is a north-south fault strike slip fault with the area west of the fault offset to the north. The fault cuts through the North Cascades of Washington and the BC Coast Range. The fault was active during the Eocene. 

BC Coast Range west of the fault. Harrison Lake is on the upper left. During a diffrent geologic work era I had numerous ventures into the area and was fun picking out the various valleys and ridges from that time.

After landing, I took the sky train into downtown Vancouver and did a walk about the urban core through the downtown area, Gas Town, the abrupt change to the east with people having a hard life to China Town. 

On the train through Burnaby I observed thousands of crows over several miles flocking towards their night roosts. They are Commuter Crows.

Crows just west of Burnaby

Crossing the Fraser at New Westminster with a view of the sky train bridge

The train stops at the border at Blaine for inspection.

Crossing David Thompson's early days

 

Traveling to see family, we had a stop over for a few days in London. During a walk about I spotted this plaque noting that David Thompson had attended this school. Thompson followed the upper drainages of the Coulmbia River down to the Paficic Ocean. By every account I have read of him he was a very fine fellow. I am sure the school and the neighborhood has changed a bit since the late 1700s, but it was a pleasant surprise to walk another part of his life path.

I am enjoying the snow while away from home