This paper was presented at the `Innovative Bridge Projects, 1993-96' session. Rehabilitation of the 75 year old Hillhurst (Louise) Bridge, in downtown Calgary, Alberta, involves the development and implementation of innovative structural systems which accommodated a relatively short construction schedule in a cost effective manner. Also of significance was the sensitivity allotted to the imposed disruption on local residential and business communities, as well as, consideration given to restoring the bridge's original historic architecture. This paper discusses the structural investigation, alternatives evaluated as part of the rehabilitation/replacement study, as well as, the results of the life cycle cost analysis. Design concepts are presented which include the use of prefabricated steel and concrete elements to facilitate the ease of construction and shorten the construction schedule in a cost effective manner, while meeting the City of Calgary's design requirements. (A)
Abstract