Wetland Classification and Mapping of Seward, Alaska



Map Unit Descriptions


Ecosystem: Riparian


Map Component: RC


Seward Area Extent: 1 wetland polygon; 8.9 acres

The only stream mapped as RC in the Seward area, not far above its confluence with Sawmill Creek.  Note the small point bar on the right.

Wetland Indicators

Type: Stream

Depth to water table: not measured

Organic layer thickness: not measured

Average depth to redoximorphic features: not measured

Common Soils: Typic Cryofluvents

Common Plant communities:

Sitka spruce / Sitka alder (Picea sitchensis / Alnus viridis ssp. sinuata)

Mountain hemlock / early blueberry (Tsuga mertensiana / Vaccinium ovalifolium)


NWI: Stream: R2US1.  Adjacent valley wetlands: PSS1/FO1&3Jn

HGM: Stream: Middle Gradient Natural Stream-single thread.  Adjacent valley wetlands: Lotic Flat/Slope groundwater-dominated Throughflow/Bidirectional-nontidal.

The single stream mapped as RC drains an unnamed glacier south of the Bear Lake Glacier.  It flows through a spring fen complex before emptying into Sawmill Creek.  RC streams have cut banks and point bars, with well-developed floodplains.

Floodplain regulation

From The Kenai Borough website:

"The Kenai Peninsula Borough manages a Floodplain Ordinance that addresses proper development to reduce flood risks and lessen the economic losses caused by flood events. The ordinance provides building standards for construction projects within the floodplain to ensure the availability of flood insurance through the National Flood Insurance Program. These building requirements also are intended to minimize or prevent damage when flood events occur. The ordinance requires floodplain development permits for all projects in floodplains."


Do I Need a Permit?

 Introduction and Key to Plant Communities  

Introduction and Key to Ecosystems

    Kenai Hydric Soils    Map Unit Summary    Methods    Glossary



Contact: Mike Gracz
Kenai Watershed Forum 
Homer Field Office
Old Town Professional Center
3430 Main Street Suite B1
Homer, AK  99603

12 February 2007 15:23