Past Development
1963
Duwamish CO district established. #5XB CENTREX (W-I version) — POTS unit placed in new building at East Marginal Way and Corson Avenue. 1516 Boeing Plant #2 MS and 1131 Parkway MS transferred to new unit. 2L-5N dialing, DDD/LAMA-CAMA included. ANC (654) established on the CENTREX portion of the unit.
1964
1600 MS from PA and 925 MS from West transferred to Duwamish — Rockwell.
1965
595 MS from Main transferred to Duwamish — Rockwell.
1966
1500 MS from Parkway transferred to Duwamish — Rockwell.
Future Development
For the current view of future developments, please refer to the Seattle section of the "Planning Guide issued by the District Engineer – Planning.