As a result, Mountain Gem had been leased out, with an additional $10,000 expended to complete the steamer for the leaseholder, the money being raised by obtaining a loan secured by a mortgage on the steamer. Financing problems īefore construction of Mountain Gem was complete, mining activity had fallen off sharply. Campbell, and was manufactured by the Willamette Iron Works of Portland. The machinery was designed by engineer F.L. The boilers were licensed to carry 225 pounds of steam. Mountain Gem could reach a speed of 19 miles an hour. Mountain Gem was driven by twin steam engines, horizontally mounted, each with a bore of 13 in (33.0 cm) and stroke of 72 in (1.83 m) turning a stern-wheel. The steamer had overnight accommodations for 75 passengers. On day excursions, Mountain Gem could carry 200 passengers. The merchant vessel registry number was 201045. Overall size of the steamer was 469 gross tons and 282 net tons, with tons being a measure of volume and not weight. To minimize the chance of sinking in the many rapids of the Snake River, the hull was divided into 29 water-tight compartments. The depth of hold was 5 ft (1.52 m) feet. The steamer had a beam 26.5 ft (8.08 m) measured over the hull exclusive of long protective timbers, called guards, along the upper outside edge of the hull. Mountain Gem was 150 ft (45.72 m) long over the hull, exclusive of the fantail, which was the extension over the stern on which the stern-wheel was mounted. Specifications Īdvertisement, placed March 10, 1905, for an excursion on Mountain Gem, from Lewiston, Idaho, to the Grande Ronde River. Mountain Gem was built in Lewiston, Idaho, in 1904. When Imnaha was wrecked, the mine owners went to the public and asked them to raise money for a new steamer. Imnaha had been serving mines in the Eureka area upriver from Lewiston. Mountain Gem was built with funds raised by a public stock subscription which raised $10,000 to build a new steamer for work on the upper Snake River to replace the wrecked Imnaha. Allen, a businessman of Clarkston, Washington. Īccording to one report, the steamer cost $35,000 to construct. Possible by the National Science Foundation.Mountain Gem was built for the Lewiston Navigation company.
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