Water Use Permit modifications – duration for significant modifications. Under current District rules, permits that are modified during their permit term retain the existing expiration date as the majority of modifications involve only portions of the permitted activity and the entire activity is not reevaluated. However, in some cases, the modification is of such a magnitude that it essentially results in a total reevaluation of the permitted activity. When these types of modifications are limited to the existing permit term, this results in the staff and applicant performing another total reevaluation within only a few years time. In these cases, it is more efficient for both the District and the applicant to handle the modification as a full renewal, thereby extending the permit by a full permit term. A renewal permit fee will be assessed rather than a modification fee, and such a renewal is predicated upon a request by the applicant.