The bridge is a series of shoal's which geomorphologists say are the leftovers of a natural land bridge which existed as last as the last ice age.
The bridge is an impediment for ships trying to come from the west heading towards India's east coast. Even where the bridge is now submerged, the sea floor is shallow enough to prevent crossing. So the government is planning to dredge part of the bridge to create a "canal" which would allow for faster maritime travel.
Protests and a court case were launched to save Rama's Bridge on environmental and cultural reasons. The government responded with a report saying the bridge was natural and the religious element of the argument was pointless because Rama was probably not real. "And there was heck to pay." Devout Hindus in the region were shocked and angered by the government's statement. Opposition parties pointed out how the Sikh prime minister and non-Hindu, "cult" member president were treating the majority Hindu's culture. The outrage got so intense the government had to withdraw its statement.
The government in Delhi ignored the cultural importance of the bridge and they are paying for it. Geography matters in India.