Hillside Dewatering
Owner: CalTrans
Contractor: G.R. Sundberg
Crossing: Hwy. 299 Mtnside (Blue Lake, CA)
Length: 4 crossings - 302 LF, 475 LF, 747 LF, 440 LF (all solid rock formation)
Pipe Size: 5" Steel Pipe
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Hwy. 299 had a history of swelling during the rainy season and causing continuous road repairs throughout the year. A separate contractor drilled 3' diameter vertical galleys on the top of the mountain and JCGE's job was to drill on minimal slope into the narrow galleys to install 5" drill-and-leave steel drain pipes. Complications included extremely hard rock as well as voids within the mountain caused by shifting faults. With a couple audible calls throughout the process, the project resulted in a success.
Owner: CalTrans
Contractor: Condon-Johnson
Crossing: 3 bores into center of hill (Cloverdale, CA)
Length: 4 crossings - 205 LF, 240 LF, 400 LF (rock formation)
Pipe Size: 5" Steel Pipe
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During the rainy season, the hillside would become so saturated that it would swell drastically and sluff off onto Hwy. 101. 5" steel drain pipe was installed and 40,000+ gallons of water was immediately released into the onsite frac-tanks and the problem was resolved.
