Critical Area Maps Sources

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The approximate location and extent of critical areas and lands within the city planning area are provided from various agency map sources. These maps are based on the best available information and are intended to be used as a general guide for the assistance of property owners and as information for the public. Boundaries are generalized; field investigation and analysis by a qualified expert may be required to confirm the existence of a critical area. The city will update information and resource material as it becomes available and feasible.


Map/Data Source(s)                                                                           (KMC18.20.070)


Geologically Hazardous Areas

1. Geologic Hazard Map of Cowlitz County, Cowlitz-Wahkiakum Council of Governments, 1993, as amended.

Map Source:

Related Link:

Washington State Department of Natural Resources Geological Information Portal


2. Karl Wegmann DNR Landslide Study 2003—Digital Landslide Inventory Cowlitz County, WA, City of Kelso and Vicinity, as amended.

Map Source:

Digital Landslide Inventory for the Cowlitz County Urban Corridor, Washington V. 1.0 by Karl W. Wegmann 2006.

The following Kelso area maps have been downloaded from the DNR website:
07 Kelso (pdf)
08 Mount Brynion (pdf)
09 Rainier (pdf)
10 Kalama (pdf)

Related Links:


Frequently Flooded Areas

3. FEMA, National Flood Insurance Program, Flood Insurance Rate Maps.

Map Source:


Critical Aquifer Recharge Areas

4. Cowlitz County Aquifer Recharge Map, Cowlitz-Wahkiakum Council of Governments, 1993, as amended.

Map Source:



5. Cowlitz County Wetlands Map, Cowlitz-Wahkiakum Council of Governments, 1993, as amended.

Source: Hydric Soils, USDA, Soil Conservation Service, National Wetlands Inventory Maps, U.S. Department of Interior, Fish and Wildlife Service.

Map Source:

Map Source: This map developed by State of Washington Dept. of Ecology & NOAA can be used to look for wetlands in your area.

2011 Wetlands Inventory


Fish and Wildlife Habitat Conservation Areas

6. Habitat and Species Maps, Washington Department of Wildlife, 1991, as amended.

Map Source:


7. Forest Practice Act Stream Mapping.

Map Source:

Related link:​


Critical Area information can be found in Title 18 of the Kelso Municipal Code (KMC).