Sediment Stabilization (SS) Question

GIS File to Display

Data type

How used

1. Wetland normally lack an inundated portion?

Wetlands.shp

Wreg_c

if Wreg_c = F,G,H, or Z, then wetland is inundated

2. Herbaceous, trees, or shrubs >10% of inundated wetland?

Wetlands.shp

Class1_c

if Class1_c is EM, SS, or FO within >10% of inundated wetland, answer "Y"

3. Open water area of wetland > than remainder of wetland?

Wetlands.shp

Class1_c

if area of UB >50% of total wetland area, answer "Y"

4. Open water >100 feet wide surrounded by emergents?

Wetlands.shp

Class1_c

look for area of UB surrounded by EM

5. Wetland in position to protect nearby shoreline?

DRG

--

only applies to wetlands that could protect shoreline of St. Louis R. or harbor

6. High vegetation/open water interspersion?

Wetlands.shp

Class1_c

look for open water (UB) interspersion with vegetation

7. Submergent or floating aquatic vegetation present?

Wetlands.shp

Class1_c

if Class1_c is AB, answer "Y"

8. Vegetation w/ obscure boundaries & high interspersion?

na

--

requires field inspection

9. Does wetland have ditches, channels, levees etc?

DRG

--

look for ditch or channel

10. Fluctuations in water levels due to dams or stormwater?

Wetlands.shp, Tncstreams.shp, DRG

--

applies to wetlands on urban streams and St. Louis R.

11. Channelized tributaries upstream of wetland?

DRG

--

look for ditch or channel upstream of wetland

12. Erosion around or in the wetland?

na

--

requires field inspection

13. Unstable and/or steep banks adjacent to wetland?

na

--

requires field inspection

14. Fringe of grass, trees, or shrubs along wetland-upland edge?

Forests.shp

Csa_code

if vegetation fringing >50% of wetland has Csa_code 01-86 and is >20 ft. wide, answer "Y"

15. Wetland >50% Type 6 or 7?

Wetlands.shp

Class1_c

if FO or SS area is >50% of total wetland area, then answer "Y"

16. Underlying substrate of bedrock, cobble, or gravel?

na

--

requires field inspection