The problem of physical topology design lor optical networks has been studied over years. Some studies consider the survivability aspect of the networks while designing. In this paper, the authors push the study on survivable optical network design further by considering in addition the possibility that fiber cables connecting different fiber nodes may be bundled together in the same conduit, thus, they share the same risk when the conduit fails. Since the considering design problem is NP-hard, the authors propose an heuristic for solving the problem. The objective of the design is minimising the total network cost. The results show that the heuristic solutions are about 12 percent different from the optimal ones.