{ "name":"Geomorphology/StreamManagementCorridors", "title":"Geomorphology/StreamManagementCorridors", "type":"Map Service", "typeKeywords":["ArcGIS Server","Service","Map Service"], "description":"

Stream Management Corridors (SMCs) are the general corridors needed to allow a stream to function in a way that replicates natural processes to the extent possible. Stream Management Corridors should be considered when developing a site plan at the earliest stages of land planning or planning for a stream restoration project.<\/span><\/p>

This SMC dataset is based on a floodplain-based regression analysis. MHFD staff identified SMCs on both the eastern and western sides of the District\u2019s service area where the previous shear stress-based method (released in 2019) produced unrealistic SMC widths. To improve accuracy, MHFD updated these SMCs using the revised floodplain-based approach. Last updated: 6/21/2025<\/span><\/p>

This is the first release of stream management corridors following the regression-based approach and should be used in place of the <\/span>legacy shear stress based stream management corridors<\/span><\/a>. <\/span><\/p>

SMCs depicted in dark green were developed using a very high level GIS desktop analysis based on a floodplain-based regression analysis. These are intended to be a starting point for planning purposes only, with refinement occurring through project design in combination with a more detailed science-backed methodology based on current practices.<\/span><\/p>

SMCs depicted in light green were developed using a field visit confirmed, peer reviewed, detailed analysis of the stream corridor. This may be fulfilled by a Fluvial Hazard Zone study or other scientifically defensible methods.<\/span><\/p>

SMCs are still under development for streams not showing an associated corridor.<\/span><\/p>

For more information about stream management corridors and flood hazard zones, visit the <\/span>Colorado Flood Hazard Zone Mapping Program website<\/span><\/a>. <\/span><\/p><\/div><\/div><\/div>", "extent":[[-1.1659898310611283E7,-1.1646146266491417E7],[4816999.66238119,4827686.932997516]], "url":"https://gis.mhfd.org/server/rest/services/Geomorphology/StreamManagementCorridors/MapServer" }