To the extent possible given landowner permission to access, the Maxwelton and Chapman Creek watersheds were systematically surveyed for habitat features, culverts, channel modifications, and fish. Because access to portions of each watershed was denied, the data presented in this map set can not be considered comprehensive.
Base Data
Geographic base data for
this map set includes the following features: contour lines delineated from
LIDAR elevation data provided by
The water type information
illustrated in this map set represents data collected in the field by
Washington Trout surveyors. Wetlands Disclaimer: While a systematic wetland
delineation survey was outside of the scope of this project, significant
wetlands encountered during the field surveys were marked on the survey maps
and incorporated into the GIS.
| Water Type Definitions Table |
Streams were typed using the water typing protocol outlined by the Washington State Department of Natural Resources in WAC 222-16-031.
Data Point Attributes
Habitat Observation Points are located where WT crews documented general instream and riparian condition.
2. Culvert Observation Points
Culvert Points represent locations of culverts observed during the course of the water type survey and/or the culvert inventory. The points are hyperlinks to photographs and/or data characterizing the culvert observation point. For those culverts included in the culvert inventory, the field data collected are available as a link from the culvert observation points.
3. Channel Modification Observation Points (Channel Mods)
Channel modifications are defined as features, either man-made or natural, that significantly affect the flow of a stream and/or may affect fish migration. This definition includes active or derelict water diversions and water withdrawals, hydro-modified channels, beaver dams, and debris jams. These points are hyperlinks to WT data and photographs regarding channel modification observations, where such information is available.
4. Fish Observation Points
Fish Observation Points represent locations where WT survey crews brought fish to hand through the use of electrofishing equipment. After photographing them, all fish were revived and released unharmed. This category does not constitute a comprehensive fish distribution description, as fish were observed visually but not brought to hand in some stream reaches. These points are hyperlinks, and can be clicked to access photographs and descriptions of the fish. Additional information regarding fish observations may be available in the “Stream Reports.”
5. Water Type Change Reports (Stream Reports)
Each stream report provides summary data characterizing the specific stream reach to which it refers. Stream reports can be accessed by clicking on the small black boxes located on the interactive maps. Each report describes the proposed change in watertype, and provides the physical and biological data used to support the proposed change. Included are the names of the survey crew; date of survey; type change description; and notes regarding the presence of fish, the channel width, riparian cover, large wood, and other relevant field notes.