Work on 200-year-old bridge in Ceredigion to close road
Replacing part of a 200-year-old stone-clad bridge will mean the closure of a road for about six weeks.
Ceredigion council said the bridge in Capel Dewi, near Llandysul, was in a "very poor state" and would be replaced with a modern concrete structure.
Some villagers have criticised the level of consultation, and are concerned at the effect on wildlife.
But the council said notices were put in local newspapers and on its website, and the Environment Agency approved.
The council said a road over the bridge would be closed while the work, which starts on Monday, takes place.
But resident Ian Purkis, an environmental consultant, said he was "extremely unhappy" with the way the council had dealt with the situation.
He said he was still seeking information about plans for the bridge, and how the environment will be protected.
"I'm concerned about the environmental impact on the river and its wildlife. There is a site of special scientific interest and a European special conservation site 200m down stream from where the work is due to take place."
Ceredigion council said: "The existing - and rather effective - stone cladding is being removed, with as much as possible of it being retained to face the new structure.
"This scheme is a maintenance issue and the road closure has been subject to statutory consultation in order to obtain the necessary road closure consents with public notices having been placed within the local press and on the county council's website.
"Road closure notices are also on display at the site. Environment Agency Wales has been fully consulted and has approved the scheme."
Local county councillor Peter Davies said he was confident the council was following the "proper procedures".