Eastern Sierra Crane Exam Prep for Mono County

Mammoth Lakes: building between snowfalls

Mammoth Mountain and June Mountain drive much of the county's construction. Lodging, condos, resort buildings and lift infrastructure get built and rebuilt in a season that runs roughly from late spring snowmelt to the first autumn storms. Heavy snow loads mean steel and roof structures are substantial, and setting them often calls for hydraulic cranes on tight, sloped lots.

At these elevations, wind deserves more respect than it gets in the valley. Gusts off the crest can rise quickly, and a load with a large surface area, such as a roof truss bundle or a wall panel, can sail. Know the chart notes on wind and know when to stop.

Highway 395 and the utility lines that follow it

US 395 is the county's lifeline, and Caltrans work on it never really stops: rockfall fencing, culverts, bridge rails and maintenance-yard projects. Transmission and distribution lines run alongside much of the route, so the line crews and pole-setting contractors who keep power flowing to Bridgeport, Lee Vining and June Lake are part of the local lifting picture too.

The Los Angeles Department of Water and Power's aqueduct system reaches north into the Mono Basin as well, and its facilities need periodic maintenance. Long distances between towns mean crews often carry everything they need, so knowing your rigging gear inspection criteria matters when the next replacement shackle is an hour away.

Geothermal power at Casa Diablo

Just east of Mammoth Lakes, Ormat's Casa Diablo IV geothermal plant reached commercial operation in July 2022 with about 30 megawatts of capacity, selling power to community energy agencies on the Central Coast and in Silicon Valley and to the Southern California Public Power Authority. It sits beside older Casa Diablo units on public land managed by the BLM and Inyo National Forest.

Geothermal plants mean heat exchangers, pumps, piping and well equipment, much of it heavy and some of it lifted near hot pipelines. That is good ground for riggers with Level 2 skills.

Federal ground near Bridgeport

The Marine Corps Mountain Warfare Training Center operates in the mountains northwest of Bridgeport, where it trains Marines in cold-weather and high-altitude conditions. Construction and maintenance by private contractors on a military installation generally fall under federal OSHA rather than Cal/OSHA. Much of the rest of the county is national forest or BLM land, so check with your employer on each job.

Off the base, Cal/OSHA is the program. Its rule for covered mobile and tower cranes is a type-specific certificate from an accredited certifier, not a state license, together with the employer's own verification. See the requirements guide for exemptions and renewals.

Courses that suit the Eastern Sierra

• Mobile crane operator for resort and highway lifts
• Rigger Level 2 for geothermal and plant equipment
• Service truck crane operator for mechanics servicing snowcats, loaders and plant gear
• Mobile crane recertification for operators renewing a five-year card