12.04.030 Base lines and districts.
Thurston County shall be divided into four districts as determined by the base lines. All addresses shall be suffixed by the name of the quadrant in which it is located. Base lines, described herein, and depicted on the official map.
A. Base lines are described as follows:
1. North-South Base Line--From the north, south along the mid-point of Budd Inlet, south along Capitol Way and continuing south on Capitol Boulevard in Tumwater, then continuing south from Tumwater along the Olympia-Tenino Road (Old U.S. 99) through Tenino and continuing south along State Highway 507 through Bucoda to the Lewis County Line.
2. East-West Base Line--Beginning on the west at the Grays Harbor County Line on U.S. 410, continuing east to the junction with U.S. 101, then east along U.S. 101 to that point where the Mud Bay Road adjoins U.S. 101 (end of FAS 344), then east along Mud Bay Road (also known as Old Olympic Highway and Old 101) to the junction of Mud Bay Road and Fourth Avenue, east along Fourth Avenue, then east along Martin Way to the Old Nisqually Bridge at the Pierce County Line.
B. Districts are described as follows:
1. NE - Northeast--that portion of Thurston County north of the east-west base line, and east of the north-south base line,
2. NW - Northwest--that portion of Thurston County north of the east-west base line, and west of the north-south base line,
3. SE - Southeast--that portion of Thurston County south of the east-west base line, and east of the north-south base line,
4. SW - Southwest--that portion of Thurston County south of the east-west base line, and west of the north-south base line. (Ord. 159 §3, 1970).