USPSのサイトによると、この2箇所は予約必要のようですよ。
下記の電話で予約のようです。
PANTHER CREEK ›
10800 GOSLING RD
SPRING, TX 77381-9998
281-419-8231
* An appointment to apply for a passport is required for this Post Office™ location.
Call 281-419-8231 for an appointment. For more information, contact the Department of State at travel.state.gov or 877-487-2778.
THE WOODLANDS ›
9450 PINECROFT DR
SPRING, TX 77380-9998
281-419-7948
* An appointment to apply for a passport is required for this Post Office™ location.
Call 281-419-7948 for an appointment. For more information, contact the Department of State at travel.state.gov or 877-487-2778.