
Leader Creek Fisheries spent 3 years from concept to the final product in developing their time and fuel saving process. The idea of hauling the vessels out of the water on a dolly and crossbeam configuration came from the concept of hauling logs out of the water on cart systems. If 60ton bundles of logs could be hauled out on carts, then a system could also be developed to haul out 50- 60ton tugboats. The final design is capable of being adapted to haul out up to 400ton barges.
The system used to haul out the vessels can be configured with up to 10 Holland Dollies from Holland Moving & Rigging Supplies and 5 crossbeams or trusses. Each 40ft steel truss consists of two dollies, two accumulators and several 6†x 12†Douglas Fir timbers attached to the top to provide a less slippery interface with the vessels. The dollies are modified to be capable of being submersed in water and accumulators assist in regulating the pressure in the hydraulic system. In order to haul out the vessels, dollies are sent down a ramp into the water and the vessel is positioned over the dollies and engaged with the crossbeams. The entire system is then pulled out of the water by a large winch with the hull of the vessel resting on the timbers.
On October 7, 2010, Leader Creek Fisheries started pulling out vessels with Crowley Maritimeʼs 40ft x 140ft fuel barge weighing 300ton and one of Crowleyʼs tugboats weighing 250ton. When pulling longer scows out of the water, raising the hydraulic cylinders on the dollies compensates for an arc in the ramp. The hydraulic cylinders on the Holland Dollies for each truss are coupled together in order to equalize the load. Nitrogen in the accumulators controls the hydraulics to assure the cylinder can adjust and maintain consistent control of the vessel.
Leader Creek Fisheriesʼ one of a kind system allows companies to save on mobilization costs and reduces downtime for winter. The fuel and time savings will make a significant impact on the region. www.leadercreekfisheries.com