Crews are trying to make temporary repairs while bids are sought for a new bridge there.
Road officials characterized the state of the bridge as precarious. The span will be closed for a month to motor vehicles while work continues. The Ministerio de Obras Públicas y Transportes said that pedestrians will be allowed to use the bridge as well as persons on bicycles and motorcycles.
An early part of the work will be a complete diagnosis of the bridge by engineers. The bridge has a weight limit of four tons, but that limit was not respected, officials said.
Once repair work is finished, the weight limit will be reduced to three tons, they said.
Ministry officiasl said that a new, two-lane bridge probably will take at least 18 months for design and construction. They said that for technical reasons a bailey bridge is not suitable for the span.