pass across the Rocky Mountains. The post also produced pemmican and York boats. The posts were built at the confluence of the Clearwater River and the North Saskatchewan River. They were on the north bank just above the Clearwater and strongly built for protection from the Blackfeet. During low water there were rapids near the post. Around 1980, only two stone chimneys were standing. An interpretive centre was subsequently developed at this location. Timeline 1790: Peter Pangman of the North West Company marked the site for the future company fort. 1799–1802: In September 1799, a group of Nor'Westers (North West Company employees) under John McDonald of Garth travelled upstream of Fort Augustus by canoe and horseback and established Rocky Mountain House. James Bird of the HBC followed and built Acton House. David Thompson and Duncan McGillivray of the NWC were wintering partners at their House. The Kootenays did not cross the mountains in significant numbers and attempts to find a pass failed. Therefore, both posts were closed in 1802. 1805–1807: The two posts were reopened without much success. In 1807, David Thompson of the NWC went up the North Saskatchewan, found Howse Pass and built Kootenay House on the Columbia River. The new post made Rocky Mountain House unnecessary and the posts were closed again in 1807. 1810–1812: Reopened in 1810, Alexander Henry 'The Younger' of the NWC found that the route over the mountains was blockaded by the Piegans. He and David Thompson set out overland north to the Athabasca River. After ascending it for five days, they abandoned their horses for snowshoes to cross Athabasca Pass for the first time and reached the Columbia River at Boat Encampment. Athabasca Pass was clearly superior and attempts to reach the Columbia shifted north. In 1811, a group of Gros Ventres planned to attack the fort but were threatened away by the Piegans who preferred to trade at Rocky Mountain House rather than at Fort Edmonton near their Cree enemies. The two posts were then closed to consolidate trade at Fort Edmonton. 1819–1823: Attempts to get the Blackfeet to trade at Fort Edmonton failed so the forts were reopened. With John Rowland in charge for the NWC, the two companies were merged in 1821 and the combined fort was called Rocky Mountain House. In 1823, George Simpson decided to close the post since there were few beaver and the post was