Complex sentence: Damage to the infrastructure was extensive, though repairable and less than expected; damage on the island was estimated at $88 million (2006 USD, $90 million 2007 USD).
Split into simpler sentences: Damage to the infrastructure was extensive, though repairable and less than expected. Damage on the island was estimated at $88 million (2006 USD, $90 million 2007 USD).