Design

The Canadian Pacific Lake and River Service preferred to use stern wheelers for transportation on Okanagan Lake because of their rugged nature and ease of maintenance. The flexibility of the stern wheeler was also well-respected at the time because it allowed the vessel to work in waters where propeller or screw-driven vessels could not.^[6] The Canadian Pacific Lake and River Service operated many steam vessels from the late 1800s to mid-1930s and relied on proven designs, with a preference for more rugged and durable vessels. However, the infrastructure and machinery required to service the more modern ships were unavailable in the interior of British Columbia, requiring all new ships to be built using older techniques and designs. As such, these stern wheelers, despite being well-suited to the varying Okanagan conditions, seemed rather modest when compared to the more contemporary boat designs.

Okanagan was designed under a similar style to its successful predecessor, SS Rossland.^[5] With a length of 61 metres (200 ft), width of 9.1 metres (30 ft), hull depth of 2.1 metres (6 ft 11 in), and gross tonnage of 1,008 tons, Okanagan was slightly larger than Rossland.

The hull was formed into a deep lake boat pattern, allowing the ship to reach speeds not possible for a riverboat of similar proportions. The ship was designed with an eye for elegance, resulting in a graceful silhouette that lacked the boxy or top-heavy look privy to many other vessels. The layout was similar to other Canadian Pacific vessels, with three main decks (bottom-most for freight, machinery and crew's quarters, upper-most decks reserved for passenger travel and comfort with sitting rooms, galleries, observation decks, a dining hall and saloons). Okanagan boasted five dining room tables, with seating for up to thirty guests at a time, along with thirty-two staterooms and a total passenger capacity of four hundred.

Mechanically speaking, Okanagan was of typical design. A large boiler provided the steam necessary to power each engine and run the on-board dynamo. The boiler itself was coal-fired and, like other boilers of its time, was certified to provide steam pressure up to 140 psi (970 kPa). This steam was transmitted to the rear of the ship (by means of a bulkhead) where the engines drove the paddle wheel, after which the excess steam would be condensed back to its original liquid state and returned to the boiler by the jet condenser.

Murder

Constable Aston of Penticton was shot and killed on the SS Okanagan in 1912.^[8] The case began when Walter Poelke, going under the name of Walter Byde James, held up a store in a small community named Okanagan Mission. There were only $15 in the store at the time, with which he fled to the city of Penticton, two days to the south on foot, meeting up with an accomplice named Frank Wilson on the way. They were arrested in a hotel by Chief Roche and Constable Aston, who found and confiscated several weapons and 200 rounds of ammunition on James. James and Wilson were put on the SS Okanagan to be transported to Kelowna, escorted by Constable Aston. However, the police had not found a pistol during the initial search, with which James shot Constable Aston before Okanagan arrived at Peachland. James and Wilson escaped by getting off the ship at Peachland. When Constable Aston and the escape were discovered, 200 armed men from all over the valley hunted for them until two special constables^[9] found and arrested them at Wilson's Landing, a community north of Kelowna. They were put under heavy guard and Okanagan took them to jail in Kelowna, where they were later transferred to jail in Kamloops and tried for the murder of Constable Aston. Wilson claimed to be an unwilling partner in the affair and turned King's Evidence. James' trial was held on May 12, 1912, in Vernon, where the jury found him guilty of "a most cold-blooded and atrocious murder."^[10] On Friday, August 9, 1912, Walter James Poelke, 24 years of age, was hanged at Kamloops for the willful murder of Constable G. H. Aston.^[10]