Difference between revisions of "2020 MS4 General Permit Section 14 Mapping"
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| − | <big>New permittees must develop, and existing permittees must update, as necessary, a storm sewer system map that depicts the following: | + | <big><span title="An owner/operator of a small MS4 that has not been authorized to discharge stormwater under a previously issued General Stormwater Permit for small MS4s in the state of Minnesota and that applies for, and obtains coverage under the General Permit.">'''New permittees'''</span> must develop, and <span title="An owner/operator of a small MS4 that has been authorized to discharge stormwater under a previously issued general permit for small MS4s in the state of Minnesota.">'''existing permittees'''</span> must update, as necessary, a storm sewer system map that depicts the following: |
| − | :a. the permittee's entire MS4 as a goal, but at a minimum, all pipes 12 inches or greater in diameter, including stormwater flow direction in those pipes; | + | :a. the permittee's entire [https://stormwater.pca.state.mn.us/index.php?title=What_is_a_municipal_separate_storm_sewer_system_(MS4)%3F MS4] as a goal, but at a minimum, all pipes 12 inches or greater in diameter, including <span title="The direction of predominant flow within a pipe. Flow direction can be discerned if pipe elevations can be displayed on the storm sewer system map.">'''stormwater flow direction'''</span> in those pipes; |
| − | :b. outfalls, including a unique identification (ID) number assigned by the permittee, and an associated geographic coordinates; | + | :b. <span title="The point source where a MS4 discharges to a receiving water, or the stormwater discharge permanently leaves the permittee's MS4. It does not include diffuse runoff or conveyances that connect segments of the same stream or water systems (e.g., when a conveyance temporarily leaves an MS4 at a road crossing).">'''outfalls'''</span>, including a unique identification (ID) number assigned by the permittee, and an associated geographic coordinates; |
:c. <span title="A stationary and permanent BMP that is designed, constructed and operated to prevent or reduce the discharge of pollutants in stormwater"> [https://stormwater.pca.state.mn.us/index.php?title=Structural_stormwater_Best_Management_Practices structural stormwater BMPs]</span> that are part of the permittee's MS4; and | :c. <span title="A stationary and permanent BMP that is designed, constructed and operated to prevent or reduce the discharge of pollutants in stormwater"> [https://stormwater.pca.state.mn.us/index.php?title=Structural_stormwater_Best_Management_Practices structural stormwater BMPs]</span> that are part of the permittee's MS4; and | ||
| − | :d. all receiving waters. [[https://www.revisor.mn.gov/rules/7090/ Minn. R. 7090]]</big> | + | :d. all <span title="Any lake, river, stream or wetland that receives stormwater discharges from an MS4.">'''receiving waters'''</span>. [[https://www.revisor.mn.gov/rules/7090/ Minn. R. 7090]]</big> |
Revision as of 19:58, 4 March 2021
Section 14 Mapping
14.1
Mapping. [Minn. R. 7090]
14.2
New permittees must develop, and existing permittees must update, as necessary, a storm sewer system map that depicts the following:
- a. the permittee's entire MS4 as a goal, but at a minimum, all pipes 12 inches or greater in diameter, including stormwater flow direction in those pipes;
- b. outfalls, including a unique identification (ID) number assigned by the permittee, and an associated geographic coordinates;
- c. structural stormwater BMPs that are part of the permittee's MS4; and
- d. all receiving waters. [Minn. R. 7090]