ON-TIME DELIVERY, DESPITE EXTREME CONDITIONS.

SEMPRAMINNESOTA, USA

SEPTEMBER 28 2016

SEPTEMBER 282016

CC2800 RELOCATING TO NEXT INSTALLATION SITE

COMPLETED VESTAS TURBINE

Discover more on www.mammoet.com

OCTOBER 29 2016

MULTI BLADE INSTALLER ERECTING ONE OF THREE BLADES

SEPTEMBER 29 2016

OFFLOADING BASE TOWER SECTION FROM SELF-OFFLOADING TRUCK

A Z

RAPID REACTION DELIVERS WIND ENERGY TRIUMPH.

RESOURCES

CRANES2 crawler cranes2 hydro cranes2 rough terrain cranes

SPECIAL EQUIPMENTMulti Blade Installer Spreader Bars (Nacelle Lifting Beams) Hub Lifting and Turning Device

CREW60 Mammoet professionals

The wind turbines at the Black Oak

Getty Wind Project in Stearns

County, Minnesota, are 95 meters

from base to top of the tower –

two meters taller than the Statue of

Liberty. Transporting, assembling

and installing 39 of these towers

was always going to be a challenge.

But with torrential rain, lightning

and deep mud to contend with –

completing the project on time

looked like an impossible task.

It took a high-powered performance

from Mammoet to bring 78

megawatts of wind power to the

Minnesota grid on time.

Sempra Renewables’ Black Oak Getty

wind farm generates sustainable power

for 31,000 homes in Stearns County,

Minnesota. Working with the builder,

Amec Foster Wheeler, Mammoet was

responsible for the off-loading,

pre-assembly, installation, tower

cabling and mechanical turn-over of

the 39 Vestas V-110 turbines.

To maximize efficiency and optimize

resilience, the scope of work was split

between turbine technicians, electrical

technicians and crane operators, each

with a dedicated support service

comprising tooling technicians,

mechanics, safety advisors, quality

control and management. To maximize

cost-effectiveness, a fluid approach

was taken to manpower, with personnel

being brought in only when needed.

On top of the predictable challenges,

Mammoet had to overcome a major

unforeseen issue: the weather. The

region experienced exceptionally heavy

rain, which transformed the compacted

soil on which the turbines were to be

erected into a quagmire. With cranes

being used to maneuver large, heavy

sections of wind turbines, maintaining

solid, stable access to the site was

crucial for the project to be completed

safely and successfully.

Mammoet immediately set about

re-deploying personnel and resources

to assist with the changing circum-

stances. To maintain a viable work area,

loose topsoil was removed, drainage

was improved and all crane paths and

work areas were covered with

heavy-duty matting. ‘Stand-down’

procedures were implemented so work-

ers could move to safety when lightning

strikes occurred within a 30 mile radius.

This ensured sufficient resources and

personnel were mobilized to meet the

needs of the project while guaranteeing

safety at all times.

Thanks to Mammoet’s equipment,

manpower and rapid response, the

project proceeded without delay.

The Wind Farm came into commercial

operation on-schedule at the end of

2016.