Geomechanical Musings

I spent a very pleasant Saturday morning with the GeoStabilization crew as they wrapped up shotcreting the face of their Lower San Antonio Road landslide repair while I ran the nail capacity performance test.  The site is surprisingly far east to still be in Santa Clara County, past Lick Observatory by almost an hour on a beautifully scenic winding road. The test setup is pretty simple, as you can see above, and the loads are modest enough that simple cribbing on soil provides enough reaction force.  We’re really enjoying this on-call collaboration with GSI and I’m angling for a way that I can cover the next testing assignment.

The crew at the Gilboa Dam Valve Chamber have been installing caissons (compression rock sockets) for the past few weeks and are ready to return to tiedown tensioning.  Sarah Kalman, Atlas’ field engineer running the QC program, shared these two shots from earlier today.  This photo shows the test arrangement including a work platform needed for measuring tendon elongation.

The draping tendons are waiting for tensioning. The proof test force stretches the high-strength cables more than 4 inches.

Commensurate Safety Professional Will Yarborough has been an integral part of this project.  This activity requires high pressures, huge forces, cold temperatures, long hours, and working at height. We appreciate Will’s extra effort keeping us all working safely.

Our good friend Keith Mackenzie of Healy Tibbitts Builders, Inc. reports that Pier 4 is officially in service.

Young Brothers’ Barge Kukahi berthed before first light this morning with a full load of containers that will be unloaded much more efficiently onto the luxuriously-wide new wharf deck.

The Hawaii Harbors Constructors team did great work on this project, and it was a pleasure for us to be involved. Congratulations to the whole project team on a job well done!

This morning I learned something very interesting about the NCEES Council Record program. Many of you carry a Council Record for rapidly securing a PE registration when your practice takes you to a new state. A few of you, I’m sure, have had the unpleasant surprise of learning that NCEES invalidated our 20+ year old records lat year when they upgraded to a new digital system (which is a delight to use, by the way).

This morning, as I worked my way through the process of refreshing my Texas PE, I saw that my work experience was incomplete after October 2016, which was coincidentally (?) the time that I finally finished restoring my record into the new system. Neither my employment nor the nature of my practice have changed in the past 10 months, so it was another unpleasant surprise that my record could not be transmitted to Texas.

I learned from the very responsive staff at NCEES that the new system requires work experience updates every 6 months. So after I described all the interesting stuff we did in the past 11 months, I set a reminder to re-submit in February and August every year for the remainder for my career. And now that you guys know too, I suggest you do so as well.

I’m a huge proponent of the NCEES program, and want very much to take full advantage of the service they provide. It occurs to me, though, that I will now be hitting you all up for experience confirmations twice as often, which gives us all a chance to keep in touch. I’m hopeful that the review process can be completed quickly and I can get my Texas PE reinstated before the floodwaters start to recede and it’s time to go to work repairing the damage.

This morning the Corps of Engineer’s was finally overwhelmed and lost control of the flow rates out of Addicks and Barker Dams, losing the last controls over theBuffalo Bayou water level as it flows through the middle of downtown Houston. Dams are the most useful and also the most dangerous infrastructure in any community, and losing control of the outflow rate represents a significant escalation in the flood severity. Flood level management is an intricate dance of competing compromises, where retaining water behind the dam makes flooding worse upstream and releasing water makes things more severe downstream. The US Army Corps of Engineers does an excellent job navigating these difficult choices, and the disaster is always worse when the Corps loses their ability to influence the drainage patterns. Hopefully the impacted areas downstream have already been evacuated, and the rising waters spread slowly enough that first responders can help people out of harms way.

The focus of the regional emergency response system is, quite correctly, on assuring people’s safety and well being. Our work at Atlas includes participating in emergency planning efforts and also incident recovery efforts, but the actual emergency management is not part of our core expertise. For now we watch and wait, and hope that the available resources and management are enough to protect the people who are in harms way.

There’s a possibility that engineers at Atlas may assist with damage assessment and field-engineered repairs at flooded petroleum facilities along the Gulf coast. Until the flooding abates, though, there’s little that we can do besides monitor the situation and make plans for a rapid and efficient deployment. When the rain stops and the waters recede, that’s when it’ll be time for the engineers to go to work restoring safe conditions at dams, highways and bridges, industrial facilities, and other essential elements that make Houston a thriving metropolis.