Attribute
Value
|
Definition of
Attribute Value
|
| Bridge approach |
Any road or railroad, existing or historic, that ramps up to a bridge crossing |
| Car Bodies |
Car bodies are usually not identifiable in the GIS. These features have been identified in the NRCS Physical Features Inventory |
| Concrete Riprap |
It is generally impossible to indentify the type of riprap in any photography. Any riprap that is noted as concrete or rock was likely mapped in the field by the NRCS and no further field investigation has been undertaken to verify this mapping. If additional NRCS-mapped features were extended, they generally were attributed as the same type (concrete or rock) as the original feature. Note: For riprap features digitized by DTM, it was impossible to determine the actual type of material used. In this case, the feature took on the attributes of adjacent bank protection, or it was assumed to be rock. |
| Rock Riprap |
It is generally impossible to indentify the type of riprap in any photography. Any riprap that is noted as concrete or rock was likely mapped in the field by the NRCS and no further field investigation has been undertaken to verify this mapping. If additional NRCS-mapped features were extended, they generally were attributed as the same type (concrete or rock) as the original feature. Note: For riprap features digitized by DTM, it was impossible to determine the actual type of material used. In this case, the feature took on the attributes of adjacent bank protection, or it was assumed to be rock. |
| County Road |
County road features consist of any road other than the Interstate that has, or appears to have, a sizeable road prism. This includes both paved and dirt roads. In many cases a dirt road may convert to a paved road over time, and no additional attributing was made to note the change. Minor roads, driveways, and temporary features are generally mapped as "Other". |
| Floodplain Dike/Levee |
Any Dike or Levee. These features include canal dikes, streambank protections, field berms, etc. |
| Flow Deflector |
Flow deflectors consist of erosion control features such as barbs. Although these are typically point features, they were digitized as linear features comprising the entire series of deflectors. Where the flow deflectors are in association with other bank protections such as riprap or levees, they are attributed as flow deflectors. |
| In-Channel Diversion |
An in-channel diversion is any features that extends across a stream channel. This includes permanent dams, rock diversions, and semi-permanent diversions such as maintained gravel berms |
| Interstate |
Embankments assiciated with I-90 or I-94 |
| Other |
Minor roads, driveways, or other features that do not appear to have a road prism and thus do not impact the river corridor or floodplain |
| Railroad |
The railroad grade commonly encroaches into the stream corridor. These linear embankments are specifically identified as rail lines |
| Steel Retaining Wall |
A single retaining wall occurrence just below Billings |