|Regions||Cordillera Administrative Region, Ilocos Region|
|- right||Tineg River|
|- location||Mount Data, Benguet, Cordillera Administrative Region|
|- elevation||2,310 m (7,579 ft)|
|Mouth||West Philippine Sea|
|- location||Caoayan, Ilocos Sur|
|- elevation||0 m (0 ft)|
|Length||178 km (110.60 mi)|
|Basin||5,125 km2 (1,978.77 sq mi) |
The Abra River is the sixth largest river system in the Philippines in terms of watershed size. It has an estimated drainage area of 5,125 square kilometers and a length of 178 kilometers from its source in the vicinity of Mount Data in the Benguet province.
The Abra originates in the southern section of Mount Data. It descends westward to Cervantes, Ilocos Sur, and flows into Abra province. At a point near the municipality of Dolores, it is joined by the Tineg River, which originates in the uplands of Abra.
- Vicente B. Tuddao Jr. (September 21, 2011). "Water Quality Management in the Context of Basin Management: Water Quality, River Basin Management and Governance Dynamics in the Philippines" (PDF). www.wepa-db.net. Department of Environment and Natural Resources. Retrieved 10 April 2017.
- DAMS IN THE CORDILLERA. internationalrivers.org
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