sentences:  The dredging for this American era levee left behind a large stone outcropping just below water level where the Marikina's children would play, back when the water was still clean, such that this part of the river is still called ""luksong kabayo"".The name of Barangay Tumana refers to the Tagalog word for a wide level land just above water level.The area was considered ideal for vegetable farming due to the rich riversoil, and the annual inundation of the area by the Marikina River during rainy season, which prevented crawling insect pests from staying permanently.