Hydro Dams

Hydro Energy

Subheading: Hydro Dams

Oroville Dam

Case Background

The Orville Dam’s main and emergency spillways were compromised in February 2017 due to heavy rainfall. Erosion damage impacted the spillways in such a way that concern eventually grew about the risk to the structure’s crest, which if damaged, could lead to major flooding in communities below the dam. 

Immediate evacuations were ordered for the Oroville area and cities in Yuba and Sutter Counties, effecting almost 200,000 people. According to a February 2018 NBC News article, the crisis and subsequent repairs of the spillway are still impacting nearby businesses, especially in the tourism sector.

Oroville Dam Spillway damage. Source: California Department of Water Resources, Feb. 7, 2017

Some of the Dam’s damage has been attributed to California’s record rainfall in early 2017, which the Feather River hydrologic record indicated to be some of the wettest months in over 100 years.

The California Department of Water Resources has worked since May 2017 to repair and rebuild the spillways. While construction on the emergency spillway will continue into 2019, the main spillway reconstruction is complete as of November 1, 2018.

SILLE Advantage

SILLE analyses of the Oroville Dam indicate some motion along the middle of the dam most likely due to structural stress from the water weight force. The edges of the Dam’s spillway did not show significant movement indicating that the damages sustained were not necessarily a culmination of long-term ground subsidence.

SILLE’s value is demonstrated in its ability to consistently monitor a large area without installation of equipment and offers regularly updated data which can be compared with in-situ measurements for a comprehensive understanding of the dam for operational and maintenance needs as well as future risk evaluations.

SILLE Risk & Resource Savings

- Improve understanding of structural and ground motion that can affect dam operation
- Minimize the costs of corrective efforts through early vulnerability detection
- Efficiently monitor a large area for millimeter movements
- Reconstruct deformation for a better understanding of structure weaknesses

 

Case Studies

Tunneling Monitoring

Wide area monitoring

Tunneling Monitoring

Tunneling monitoring, Saint Petersburg, Russia Case Study BackgroundMonitoring surface deformation to ensure the stability and safety of the undergro...

Read more

Land Subsidence Monitoring

Wide Area monitoring, City, Port,....

Land Subsidence Monitoring

Long-term land subsidence in Mexico City Case Study Background Land subsidence is one of the main hazards in engineering and construction. Urban lan...

Read more

Geo Hazards

Landslides, Subsidence, Sinkholes,...

Geo Hazards

Rattlesnake Hills Landslide Case Background In late 2017 ground disturbances were noticed above a quarry in the Rattlesnake Hills of Yakima County i...

Read more

Energy

Oil reservoir deformation monitori...

Energy

Oil reservoir deformation monitoring in the Tengiz oil field, Kazakhstan. Case Study Background Discovered in 1979, the Tengiz oil field is the sixt...

Read more

Mining

Mining sites, surrounding infrastr...

Mining

Bytom & Chełm Śląski, Poland Case Background Poland mines millions of tons of coal every year accounting for just over half of the country's ene...

Read more

Civil Engineering

Bridges, Roads, Railroads

Civil Engineering

Hampton Roads Bridge-Tunnel (Rip Raps Island) Case Background The Hampton Roads Bridge-Tunnel (HRBT is the oldest tunnel on Interstate 64 in Hampton...

Read more

Hydro Energy

Hydro Dams

Hydro Energy

Oroville Dam Case Background The Orville Dam’s main and emergency spillways were compromised in February 2017 due to heavy rainfall. Erosion damage ...

Read more