Name: MS4 Grass Swales

Display Field: Id

Type: Feature Layer

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Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This line feature class represents MS4 grass treatment swales for stormwater located in Boca Raton. Locations were created based on existing spreadsheets that are being field verified. Inspections are reported for MS4 permitting stored in this related table:</SPAN></P><P><SPAN>MS4_NPDES_GRASS_SWALES_INSPECTION</SPAN></P><P><SPAN>Grass Treatment Swales – Swales are defined in Chapter 403.803(14), Florida Statutes, as follows:</SPAN></P><P><SPAN>“Swale means a manmade trench which:</SPAN></P><P><SPAN>1. Has a top width to depth ratio of the cross-section equal to or greater than 6:1, or side slopes equal to or flatter than 3 feet horizontal to 1-foot vertical;</SPAN></P><P><SPAN>2. Contains contiguous areas of standing or flowing water only following a rainfall event;</SPAN></P><P><SPAN>3. Is planted with or has stabilized vegetation suitable for soil stabilization, stormwater treatment, and nutrient uptake; and</SPAN></P><P><SPAN>4. Is designed to take into account the soil erodibility, soil percolation, slope, slope length, and drainage area so as to prevent erosion and reduce pollutant concentration of any discharge.</SPAN></P><P><SPAN>Swales are online retention systems and their treatment effectiveness is directly related to the amount of the annual stormwater volume that is infiltrated. Swales designed for stormwater treatment can be classified into the following two categories:</SPAN></P><P><SPAN>• Swales with swale blocks or raised driveway culverts.</SPAN></P><P><SPAN>• Swales without swale blocks or raised driveway culverts</SPAN></P></DIV></DIV></DIV>

Copyright Text: Anne Capelli - Mock Roos anne.capelli@mockroos.com City of Boca Raton Municipal Services Engineering Cassandra Neira GIS Analyst

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Spatial Reference: 102100  (3857)

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Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• Id ( type: esriFieldTypeInteger, alias: Id )
• length ( type: esriFieldTypeInteger, alias: Length in Ft. )
• Mowing_Area ( type: esriFieldTypeString, alias: Mowing Area, length: 20 )
• width ( type: esriFieldTypeInteger, alias: Width in Ft. )
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• Desc_ ( type: esriFieldTypeString, alias: Description, length: 150 )
• FEATURE_ID ( type: esriFieldTypeString, alias: Facility ID, length: 254 )
• SwaleType ( type: esriFieldTypeString, alias: Swale Type, length: 254 , Coded Values: [Conveyance: Conveyance Swales] , [Quality Treatment: Quality Treatment] )
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Relationships:

• MS4_NPDES_GRASS_SWALES_INSPECTION (16) -- Related To: Grass Swales Inspection Form (16)

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