Rule I: Drainage Systems
1. Policy.
It is the policy of the Board of Managers to regulate new construction, improvement or repair of public or private drainage systems (open and tiled) for the following purposes:
- (a) To preserve the capacities of drainage systems to accommodate future needs.
- (b) To improve water quality and prevent localized flooding.
2. Regulation.
No drainage system may be constructed, improved or repaired without first obtaining a permit from the District.
3. Criteria.
A permit applicant for construction, improvement or repair of a public or private drainage system must:
- (a) Comply with all federal, state and District wetland protection rules and regulations.
- (b) Demonstrate that such activity will not adversely impact down stream water quality or quantity.
- (c) Provide stable channel and outfall.
- (d) Demonstrate concurrence with regional pond or subdivision drainage plans approved by the District, if applicable.
- (e) Retain a hydrologic regime which complies with District Wetland Alteration Rule F.
- (f) If drainage system is proposed to outlet a landlocked basin, provide sufficient dead storage volume to retain back-to-back 100-year, twenty-four-hour rainfalls and runoff.
4. Required Exhibits.
The following exhibits must accompany the permit application. One set, full size; two sets, reduced to maximum size of 11”x17”.
- (a) Map showing location of project and tributary area.
- (b) Existing and proposed cross sections and profile of affected area.
- (c) Description of bridges or culverts required.
- (d) Narrative and calculations describing wetland impacts and affects on water levels above and below the project area.
5. Exceptions.
The Board of Managers may waive the requirement of a permit under this rule for repair to a drainage system if the applicant proposes to repair a tiled system of less than fifty feet in length, and where such repair would not alter the invert of the system.