Why the 12 federal reserve banks, 11 are located in the east, while only 1 is located in the American west?

There are 12 regional Federal Reserve Banks (not to be confused with the "member banks") with 25 branches, which serve as the operating arms of the system. Each Federal Reserve Bank is subject to oversight by the Board of Governors.[65] Each Federal Reserve Bank has a board of directors, whose members work closely with their Reserve Bank president to provide grroots economic information and input on management and monetary policy decisions. These boards are drawn from the general public and the banking community and oversee the activities of the organization. They also appoint the presidents of the Reserve Banks, subject to the approval of the Board of Governors. Reserve Bank boards consist of nine members: six serving as representatives of nonbanking enterprises and the public (nonbankers) and three as representatives of banking. Each Federal Reserve branch office has its own board of directors, composed of three to seven members, that provides vital information concerning the regional economy.[37]