Một trạm bưu điện được thiết lập trong nội giới của thành phố hiện tại năm 1851, và The Dalles được tổ chức thành một thành phố năm 1857. Nó là một trung tâm thương mại chính giữa [[Portland, Oregon|Portland]] và [[Pendleton, Oregon|Pendleton]] kể từ đó.
In 1864, the [[ United States Congress|U.S. Congress]] appropriated money to build a [[United States Mint|U.S. mint]] in The Dalles that was to use gold from [[Canyon City, Oregon|Canyon City]] for [[Mint (coin)|coinage]]. The supply of gold from Canyon City began to dwindle, however, and other problems, such as cost over-runs, workers leaving to work the gold fields, and flooding from the Columbia River, also contributed to the project running two years behind schedule and led eventually to the project's demise. In 1870 the [[ State of Oregon]] received the property from the U.S. Government and the building was put to other uses.<ref>[http://www.wasco-history.r9esd.k12.or.us/comm/td/mint.html Wasco History]</ref> The mint is now home to Erin Glenn Winery.
Construction of [[The Dalles Dam]] in 1957 submerged the Long Narrows and [[ Celilo Falls]].
In 1970, the [[Bonneville Power Administration ]] opened the [[Celilo Converter Station ]] nearby, the northern terminus of the [[Pacific DC Intertie]] which sends 3 ,100 [[megawatts]] of electricity to [[Los Angeles]].
In [], the Internet company [[Google]] began building a major data center, known locally as [[Project 02]], along the Columbia River in The Dalles, using the area's reliable hydroelectric power and the underutilized fiber optic capacity of the area. The new complex includes two buildings, each approximately the size of a [[American football|football]] field, and two cooling plants four stories high. The project has created hundreds of jobs in the area, mainly in construction, with an additional 60-200 permanent positions expected later in 2006. <ref>Markoff, John and Saul Hansell (June 14, 2006). [http://www.nytimes.com/2006/06/14/technology/14search.html?ex=1307937600&en=d96a72b3c5f91c47&ei=5090 "Hiding in Plain Sight, Google Seeks More Power"]. ''The New York Times''.</ref>