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Geotechnical investigation at proposed Allentown Hockey Arena
Project Related

Allentown PA arena will use micropiles to mitigate sinkholes

January 4, 2012 rockman Project Related Comments Off on Allentown PA arena will use micropiles to mitigate sinkholes

An arena being built for the Philadelphia Flyers’ minor league affiliate hockey team will be founded on micropiles to mitigate possible sinkhole problems in the limestone bedrock. The arena in located at the site of […]

Sinkhole (now filled with concrete) caused by ground loss during Bertha Tunneling
Project Related

More Trouble for Bertha TBM, Sinkhole, Tunneling Suspended

January 22, 2016 rockman Project Related Comments Off on More Trouble for Bertha TBM, Sinkhole, Tunneling Suspended

The Bertha TBM creating the Alaska Way Viaduct Replacement Tunnel and the Seattle Tunnel Partners JV just can’t seem to catch a break. After being stopped for nearly 2 years to replace the entire cutterhead […]

February 12, 2017 image of water flowing over emergency spillway at Oroville Dam in California
Failures

California Narrowly Averts Disaster at Oroville Dam

February 28, 2017 rockman Failures Comments Off on California Narrowly Averts Disaster at Oroville Dam

Earlier in February severe rain caused the Oroville Dam in Sacramento to reach capacity. The dam is an earth fill dam approximately 770 feet high, making it one of the tallest dams of this type […]