Route 104 Corridor Trail Feasibility Study - Genesee Transportation ...

INVENTORY AND ANALYSIS
4
Route 104 Corridor Trail Feasibility Study
A formal wetland delineation is needed to make a final determination of wetland and stream boundaries. The
wetland delineation would need to be conducted according to the three-parameter methodology presented in the
1987 Corps of Engineers Wetland Delineation Manual (Environmental Laboratory, 1987) and the updated
methodologies presented in the Interim Regional Supplement to the Corps of Engineers Wetland Delineation Manual:
Northcentral and Northeast Region (2009). A final determination of jurisdictional status can only be made after an
on-site agency review of identified boundaries.
Stream Assessment. A preliminary stream assessment was conducted on November 2, 2010, by an edr ecologist.
Stream characteristics such as morphology, gradient, channel bottom substrate, flow, instream conditions, and
adjacent community type were recorded along reaches of the 14 main streams crossing the study area. For the
purposes of reporting data and observations, Table 4.3 below provides a summary of the stream characteristics
recorded at each reach.
Table 4.3. Stream Characteristics
Stream
Name
Fourmile
Creek W
DEC
Stream
Class
C
Channel Morphology
Bank Width: 10-15 ft.
Stream Width: 6-8 ft.
Water Depth 2 in.-6 in.
Gradient
Gentle
Channel
Substrate
Cobble and
Stone
Flow
Moderate
Instream
Conditions
Perennial stream
with cobble/stone
substrate. Good
riffle/run sequence
with minimal bank
erosion and
overhanging
vegetation.
Adjacent
Community
Type
Narrow riparian
corridor
(locust/maple) with
adjacent residential
areas and mowed
lawns.
Fourmile
Creek E
C
Bank Width:
Stream Width:
Water Depth
5-8 ft.
3-4 ft.
2 in.-4 ft.
Gentle
Silt, stone and
Cobble
Gentle
Perennial stream
with obscured
vegetated banks
and no sign of
erosion.
Developed land on
either side of stream
in study area.
Riparian forest
buffers some of the
adjacent
development SW of
study area.
Unnamed
Stream 1
C
Bank Width:
Stream Width:
Water Depth
6 ft.
3 ft.
2 in.-6 ft.
Gentle Silt and Sand Gentle
Intermittent stream
with obscured
vegetated banks.
No sign of erosion.
Invasives present
(reed).
Old-field/scrub shrub
community with
developed land
adjacent.
Unnamed
Stream 2
C
Bank Width:
Stream Width:
Water Depth
4-5 ft.
3-4 ft.
4-6 in.
Gentle
Silt, sand and
vegetated
substrate.
Gentle
Straightened
intermittent
channel with
obscured
vegetated banks.
Mowed lawn/
developed land.
Mill Creek
C
Bank Width:
Stream Width:
Water Depth
30-40 ft.
10-15 ft.
2 in – 1 ft.
Gentle
Silt, sand and
cobble.
Gentle
Perennial stream.
Vegetated banks
with minimal signs
of erosion.
Riparian forest
including maple,
locust, and willow.
Dennison
Creek W.
C
Bank Width:
Stream Width:
2 ft.
1 ft.
Gentle
Silt, sand and
vegetated
substrate.
Gentle
Intermittent stream
with obscured
vegetated banks
and no sign of
erosion. Common
Mowed lawn and
developed land.
(Electrical
substation)
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