The construction of too many bridges may prevent large oceangoing ships from sailing directly to inland cities along the river.
This means one bridge in less than 30 km across the nearly 3,000-km-long trunk of the river by that time.
This means one bridge in less than 30 km across the nearly 3, 000-km-long trunk of the river by that time.
This means one bridge in less than 30 kilometers (19 miles) across the nearly 3,000-kilometer-long trunk of the river.
