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Two Mile Bar Tunnel

Home Two Mile Bar Tunnel

Project Name: Two Mile Bar Tunnel

Division: Engineering

Project Size: Large

Condor started this project (and many others with OID) about 16 years ago with hazard evaluation in late 2002/early 2003. The stretch of canal system from Two Mile Bar Recreation Area to Sonora/Kennedy Road in Knights Ferry was identified as a high hazard. OID has experienced a multitude of issues with rockfalls from the cliffs above blocking water flow through the canal to distribution of customers. In 2005 and 2007, core hole drilling was performed along the lines of the conceptual tunnel alignment and groundwater was monitored. Many analyses and reports were prepared that brought us to 90% submittal in 2013. OID was working with several agencies for permitting and allowances to get this project off the ground for construction. Condor prepared our final submittal and design documents in 2016, the project went to bid and award in early 2017, and FINALLY construction in April 2017.

There were many challenges along the way. First, unanticipated boulders on site were challenging for the contractor to build roads and laydown areas – this delayed our start by over a month. Then the mechanical issues that come with big (and aged) equipment caused more delays – with added electrical issues, there was never a boring moment during the construction of this project. And lastly, no matter how much drilling you do, ground conditions caused some headaches as well.

And then finally – a tunnel was born… Completed hole-through on September 21 at 1:47 AM. Waiting with baited breath for the last year and a half, the current team (OID, Drill Tech and Condor) felt a sigh of relief. Especially when the two ends of excavation met perfectly! Not always an easy feat.

Condor Earth

Condor Earth is a diversified, multidisciplinary organization providing a variety of Earth and Environmental Sciences, Engineering, Chemical Risk Management, GIS, and Construction Materials Testing and Special Inspection Services to private and public sector clients.  At our core, we believe that innovation, and a commitment to quality and integrity are the keys to success.

Locations

Sonora
21663 Brian Ln.
Sonora, CA 95370
(209) 532-0361
Stockton
188 Frank West Cr. Suite I
Stockton, CA 95206
(209) 234-0518

 

Merced
1739 Ashby Road, Suite B
Merced, CA 95348
(209) 388-9601
Jamestown
17857 High School Rd.
Jamestown, CA 95327
(209) 984-4593

 

Rancho Cordova
2941 Sunrise Blvd, Suite 150
Rancho Cordova, CA 95742
(916) 783-2060
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