[2] It was declared a National Cultural Treasure under the Historic Bridges of Tayabas on August 12, 2011.

[3] The Malagonlong Bridge crosses the Dumacaa River and connects Barangay Mateuna and Lakawan to the eastern side of Tayabas as well as the municipalities of Mauban and Pagbilao.

[2] The bridge has a carriageway of about 6 m (20 ft) and six small balconies where pedestrians can stop by.

[2] The bridge was built between the years 1840 and 1850 under the direction of the Fray Antonio Mateos, a Franciscan priest who served as the Ministro del Pueblo of Tayabas.

[2] In an account of a Spanish traveler Juan Alvarez Guerra, the bridge was built in 1841 under Gobernadorcillo Don Joaquin Ortega's term.