Olympic Peninsula Regional Anadromous Fish Habitat Intrinsic Potential Modeling

Olympic Peninsula Mapping Portal


Previous IP Modeling Work









PDF Document Phase II Report FEBRUARY 2013

PDF Document Phase I Report June 2012

Marine staff
Field Operations

A discussion on Phase II NetMap Models

Peer Review and Revisions

After conducting the OWC IP Peer Review workshop, consensus was reach on a number of issues:

A link to a discussion of the Chinook life cycle and revisions to the Chinook IP models will be found here.

Coho life cycle and revisions to the Coho IP models will be located here.

Likewise, a link to Steelhead will be found here.

Fish Bearing Networks

Gradient cutoffs

There was some disagreement as to whether 16% or 20% should be established as cutoff. Reasons given were that Coho, if they can get there, will rear in structures within streams with high gradients and that such behavior had been observed in gradients above 16%.

Anthropogenic Barriers

A barriers dataset was obtained from WDFW from the Washington Geodata Portal. These data includes dams, road crossings, and miscellaneous barriers.

Please note that these data are not complete.

Dams and miscellaneous barriers were examined to determine whether they are apparent in the USDA 2011 NAIP aerial photography. It is not possible to ground truth blockage status for these barriers using GIS methods alone. Of the anthropogenic barriers, these are the ones most likely to limit the fish bearing networks of the modeled species. Because of the need to verify these barriers and determine whether they are in fact limiting factors, they are provided on the Phase II IP maps.

As information is collected, the fish bearing network for each species will be removed upstream of these limiting barriers.

Culvers and tide gates were not considered to be limiting factors, but are included for reference.

For miscellaneous barriers, the nature of the Fill/Puncheon attribute has not been determined, and these are provisionally kept as anthropogenic barriers.

Streamnet, and possibly Northwest Indian Fisheries Commission has anthropogenic barrier data. Streamnet's barrier data is not as high a quality as WDFW's dataset and has not been considered further. Salmonscape however, does have repaired barrier data but this has not been evaluated.

Hatcheries have been added to these maps for reference. Some of the anthropogenic fish barriers are associated with these facilities.

Natural Barriers

WaDNR also provides statewide hydrography from which rapids (feature code 400) and falls (401) were extracted. Only seven rapids features were found within the study area, all within the Quillayute river system, and all, after examination using the USDA 2011 NAIP aerial photos and LiDAR which covered that portion of the Quillayute, were provisionally deemed passable, but are included on the Quillayute rivers IP maps as reference.

It is very likely that there are many more natural barriers, either partial or total. Sources are the Northwest Indian Fisheries Commission, the WRIA Salmonid Inventory manuals for WRIA 20 + reach tables, WRIA 21 + reach tables, and WRIA 24 + reach tables.