Responsibility for drainage shall be allocated as follows, unless otherwise specifically designated:
A. The developer of a subdivision is responsible for the following:
1. All surface drainage on the subdivision;
2. All increase in surface drainage outside the subdivision which results from the development of the subdivision;
3. The improvement of all minor tributaries lying within the subdivision;
4. Any significant increase in the rate or quantity of runoff in any minor or major tributary or river which results from the development of the subdivision; and
5. Provision for the maintenance of all floodway and floodway-fringe areas of major tributaries and rivers which have not been dedicated to the public.
B. The City and other levels of government will be responsible for the following:
1. The improvement of floodways of major tributaries;
2. The improvement of river floodways; and
3. The maintenance of floodway and floodway-fringe areas dedicated to the public.
(Code 1991, § 12-496)