This is an imposing word and, no doubt for that reason, is used in senses that it will not bear. The idea of too much is inseparable from it; "superabundant, superfluous, excessive", is what the dictionary says. To treat it as meaning merely inappropriate is wrong.
The Authority are now reluctant to proceed with the provision of services for a 10,000 population in case their work becomes redundant due to the subsequent need for catering for a larger population.
It is nonsense to say that provision for a population of a certain size might become superabundant if it were subsequently necessary to cater for a larger population. For this use of due to, see Due to.