Which new technology helped Washington's timber industry develop? storage plants rail transportation steam-powered plows gasoline-powered tractors

the donkey engine

Explanation:

Timbers developed around Gray's harbor and Tacoma with the new Mills used the railroads to ship timber to a wide ranged market. The timber industry was transformed then through the use of the donkey engine which was patented in the year 1881

explanation:

may i ask what challenges?

the above statement/question is (true);