The constructive features of the initial study were as follows: By the construction of a dam on the river, the water would be diverted into a canal long to the brow of the bluff, where it would fall through penstocks to the powerhouse near the Lumbang River. The power would then be transmitted to Manila, a distance of . To meet the dry-season flow and conserve the flood waters, storage reservoirs would be established on the river at suitable points. This development could be carried out at comparatively small cost and would not require exceptional engineering features. The capacity of the plant could also be increased by diverting the Lumot River to the Caliraya. However, the feasibility of the development was still in question because of storage problems. The theoretical horsepower available at the first proposed power house, with a moderate storage, was estimated at only about 6,000, which could be increased for about one-half of the year during the rainy season.
