Finding soft alluvial soil under one end of a future cycleway bridge is delaying the start of its construction, Whanganui District Council senior roading engineer Rui Leitao says.
A foot and cycle bridge is to be built, linking Upokongaro to Papaiti Rd. It will fill in a "missing link" of the Mountains to Sea/Ngā Ara Tuhono cycleway.
That section of the cycleway has been closed since 2015, because biking on SH4 is too dangerous.
After crossing the Whanganui River south of Upokongaro the cycleway will instead head to the Whanganui town limit along a new path on the riverbank, joining Somme Pde near Flemington Rd.
The whole project is to cost $2.5 million, with $600,000 from Whanganui ratepayers. Emmetts Civil Construction was to have started bridge construction in May, but a rethink is needed because ground on the Papaiti side is softer than expected.