The bridge was closed to road and pedestrian traffic on Monday and will remain closed until August.
An Otago Regional Council spokesman said yesterday no work would be conducted on the site on nine key dates linked to the University of Otago's 150th anniversary celebrations.
The first of these events, extending from this month until June, is a Clocktower lawn picnic this Friday.
The bridge would not be reopened on any of the nine dates, because that ''would be a health and safety risk'', given that the bridge was ''an ongoing work site'', the spokesman said.
Flood-protection work linked to the bridge is part of the final stage of the Otago Regional Council's Leith flood protection scheme, which is expected to cost more than $30 million.
Logan Park High School has advised parents and pupils of the need to use alternative routes to and from the school.
The only bus route affected was the Ridge Runner route (route 15), which would detour around Dundas St throughout the flood protection scheme work, and would now travel via Albany, Forth and Clyde Sts.
Eight bus stops in the area will be temporarily closed.
The ORC has said the remaining flood protection work includes constructing a 17m culvert, and vertical retaining walls, as well as making riverbed changes, and widening the channel by up to 2m over a 25m length of the Water of Leith.
A 40m ''protrusion in the channel'' will also be removed, the council said.
