Local photographer Peter Marbach has embarked on a project to document the entire Columbia River, from its source in British Columbia to the mouth in Astoria.  Marbach accepted an invitation from the Oregon Historical Society in Portland to host a solo three month exhibit.  He says part of his inspiration comes from a desire to educate people about the river while the Columbia River Treaty of 1964 is being renegotiated and could lead to salmon runs returning to the headwaters.  Marbach is raising funds for his project through hatchfund.org, a non-profit that supports artists.