REP13859

• Permit No: M1993041
• IBM Index Class Name: Report
• Doc Date: 1/20/1994
• Doc Name: DOWE FLATS UPDATED WETLAND INVENTORY REPORT
• Media Type: D
• Archive: No

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5.2.4 etlan s South of Highway 66
' Immediately south of the highway in the borrow ditch and in the borrow ditch of the
railroad, cattail wetlands are found in long, narrow strips. No wetlands were found
' in the riparian gallery forest of the St. Vrain River, except within the active channel
azea where gravel bars have temporarily revegetated with sandbar willow. A few
' remnant floodplain wetlands dominated by the wetland forb and grass spedes
' identified earlier are found immediately north of the plant in an old oxbow feature, and
just north of the gravel pit ponds.
' 5.3 Wetland Classification
' Wetlands can be dassified for purposes of nationwide inventory, evaluation and management
using the U.S. Fish and Wildlife Service (USFWS) classification system (Cowardin et al.,
' 1979). The structure of dassificaUon is hierarchical, progressing ftom systems and
subsystems at the general level, through more spedfic levels of dasses, subdasses, and
dominance types.
' Wetlands within the survey area can be classified wffhin the palustrine wetland system. The
' palustrine system describeswetlands which are dominated by trees, shrubs, emergent plants,
and emergent mosses or lichens. These wetlands can further be categorized within the
emergent wetland class. Emergent wetlands indude areas dominated by grasses and fortis.
Classfication of the project area wetlands can be outlined as follows:
' SYSTEM: Palustrine
SUBSYSTEM: None
CLASS: emergent wetland
SUBCLASS: persistent
DOMINANCE TYPES: Carex spp., Juncus spp., Typha spp., Schoenoplectus
pungens, Pha/aroides arundinaceae
' WATER REGIME: seasonally saturated
WATER CHEMISTRY: fresh
' SOIL: mineral
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