Waxaan dadka ka caawinnaa daryeelka dhulka iyo biyaha.
PWB-Portland-nidaamka biyaha-sawirka
Sawir ku saabsan nidaamkayaga biyaha, ixtiraamka Xafiiska Biyaha Portland. Dhanka midig waxaa ku yaal Bull Run Lake, bartamaha sarena waa Columbia South Shore Well Field.