The river is navigable by vessels of up to 90 tons.

90 吨下船只从这条通过。

An interim goal was set to insure that all navigable waters would be fishable and swimmable by 1983.

而短期目标是到1983年保证通航水域鱼和游泳。

With descending of the main pier s foundation slab and integral moving of pier,not only the navigable dimensions meet the demand,but also the influence on upbound ships is very li.

通过下降主墩承台及整体北移桥墩,使通航尺度达到要求,且对船舶上行影响极小。