RCW 47.17.550
RCW 47.17.550: State route No. 303.
A state highway to be known as state route number 303 is established as follows: Beginning at a junction with state route number 304 at Bremerton, thence by way of the Warren Avenue bridge across the Port Washington Narrows northerly to a junction with state route number 3 in the vicinity north of Silverdale.