Excerpt from Grand Rapids Municipal Code of Ordinances
Chapter 32 City Stormwater Drainage System
Sec. 2.216. - Private Stormwater Facilities.
The City is not responsible for providing stormwater drainage facilities on private property. It shall be the responsibility of the property owner to install, maintain, repair or replace private stormwater facilities serving the owner's property. Where stormwater facilities serve more than one (1) privately owned parcel of property, it shall be considered each property owner's joint and several responsibility to install, maintain, repair or replace the facilities serving all such properties. Any changes made to the existing private stormwater facilities that change its discharge characteristics into the CSDS need to be approved by the City Manager.
Sec. 2.217. - Easements for Drainage.
(1) Easements recorded as part of a subdivision plat that are not specifically granted to or held by the City, and are created for the purpose of managing surface water runoff from private property, are deemed to be private stormwater facilities. The maintenance obligations of these easements belong, jointly and severally, to each of the owners of the lots within the plat that utilize the easement for the discharge and management of surface water runoff from their lots.
(2) Proposed developments that have common private drainage facilities serving multiple users such as, but not limited to, subdivision plats and site condominiums shall establish county drains, under authority of the Michigan Drain Code (MCL 280.1 et seq.)
(3) Proposed developments that include the construction of private drainage facilities necessary for the proposed development and to mitigate the adverse impacts of stormwater runoff and which also receive, convey, store, treat and discharge stormwater from other public and private properties, shall enter into a "Stormwater Drainage Facilities Easement Agreement" with the City of Grand Rapids before final approval of the proposed development. The Stormwater Drainage Facilities Easement Agreement must be in a form that is acceptable to the City Attorney.
Sec. 2.236. - Stormwater Discharges to Public Streets or Rights-of-Way.
Discharge from roof drains, footing drains, sump pumps and surface drains, shall not cause a public or private nuisance, nor shall the discharge be conducted to the sanitary sewer system as prohibited in Chapter 27 of the Code. The City Manager may order the owner to discontinue the discharge. Each day the owner fails to comply with such order shall constitute a separate violation of this Code.
Sec. 2.237. - Catch Basin Connections.
Discharges from private property may not be connected into a public stormwater catch basin unless approved by the City Manager.
ARTICLE 4. - STORMWATER MANAGEMENT STANDARDS
Sec. 2.241. - NPDES Permit Holders.
Any person required by State or Federal law to obtain an NPDES permit for a discharge into the CSDS, shall provide the City with a copy of all current or proposed NPDES permits and applications, including any changes, addenda or amendments.
Sec. 2.242. - Limiting Pollutants in Stormwater Discharges.
The City Manager is authorized to require dischargers to implement pollution prevention measures, Best Management Practices, or other methods necessary to prevent or reduce the discharge of pollutants into the CSDS.
Sec. 2.243. - Limiting Discharge Rates and Volumes.
The City Manager is authorized to establish minimum design standards for stormwater discharge release rates and require dischargers to implement on-site retention, detention or other methods necessary to control the rate and volume of surface water runoff discharged into the CSDS when:
(1) A parcel of property is being developed or redeveloped in a manner that increases the impervious surface area of the property; or
(2) The discharge exceeds the City-calculated pre-development discharge characteristics for the subject property and the City Manager determines that the discharge contributes to an identified drainage, flooding or soil erosion problem.
Sec. 2.244. - Public Safety.
Protection of the public health, safety and welfare shall be a primary consideration in the design of all stormwater facilities.