A. It is unlawful to encroach upon natural or manmade drainageways with:
1. Temporary or permanent structures not approved by the city manager; or
2. Fill material or other material obstructing or restricting natural stormwater flow.
B. Natural or manmade drainageways may be altered under the supervision of, and upon application to, the department under the following circumstances:
1. A roadway crossing, provided drainage is considered in the design and culverts are designed to handle proper flow as specified in the master plan and updates, or bridges are designed such that the opening is adequate;
2. Improvements such as detention basins; and
3. Slope improvements.
All improvements or changes to drainageways must be designed by a registered professional engineer and submitted for approval to the department. Approval must be obtained before any on site work commences. (Ord. 3120, 12-21-2009)