Trumbull Cr Ph 2 Wetland DelineationHydrology, Engineering and Environmental Consulting
Wetland Delineation
Trumbull Creek Crossing, Phase II
Section 28, T29N, R21W, P.M.,
Flathead County, Montana
Prepared for:
NW Dev Group, LLC
2460 Galewood Street, Suite B
Lake Oswego, OR 97035
September 1, 2007
Prepared by:
RLK Hydro, Inc.
484 North Main Street or PO Box 1579
Kalispell, Montana 59903-1579
Phone: (406) 752-2025 Fax: (406) 257-4125 Email: info@rlkhydro.com
TABLE OF CONTENTS
INTRODUCTION................................................................................................................................................3
WETLAND DELINEATION.............................................................................................................................4
VEGETATION.....................................................................................................................................................6
HYDROLOGY.....................................................................................................................................................6
SOILS..................................................................................................................................................................... 8
WETLAND DETERMINATIONS..................................................................................................................11
JURISDICTIONAL CRITERIA.....................................................................................................................12
REFERENCES...................................................................................................................................................14
APPENDIXA.....................................................................................................................................................15
APPENDIXB......................................................................................................................................................36
APPENDIXC.....................................................................................................................................................38
APPENDIXD.....................................................................................................................................................40
APPENDIXE......................................................................................................................................................50
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Introduction
Trumbull Creek Crossing, Phase II is a proposed 140.5-acre development located in east
half of Section 28, T29N, R21W, P.M., Flathead County, Montana. The purpose of this
report is to delineate jurisdictional wetlands (Flathead County, New Subdivision
Regulations, Chapter 4, Section 1 (a.) (iv.)) according to the most recent wetland
delineation manual (Corps of Engineers Wetlands Delineation Manual, 1987) within the
proposed project. The jurisdictional limits of the Corp of Engineers are defined by the
Code of Federal Regulations (CFR) Part 328. Within the subject property, potential
wetland locations are identified along Trumbull Creek, its historic channel, stormwater
conveyances, and downstream of the convergence of Trumbull Creek and Spring Creek.
The location of the property is shown on Figure 1.
El /2 Section 28, T29N, R21 W, P.M.,
Flathead County, Montana
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Figure 1. Vicinity Map
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Wetland Delineation
The interactions of vegetation, hydrology, and soil result in the development of
characteristics unique to wetlands. The United States Army Corps of Engineers (CE) and
the United States Environmental Protection Agency (EPA) jointly define wetlands as:
"Those areas that are inundated or saturated by surface or groundwater at a
frequency and duration sufficient to support, and that under normal
circumstances do support, a prevalence of vegetation typically adapted for life in
saturated soil conditions. "
The CE has developed a method for determining if an area is a wetland based on these
three parameters - vegetation, hydrology, and soil (USACE, 1987). For an area to be
considered a wetland it must have characteristics from all three parameters, not just one
or two. Wetlands generally include swamps, marshes, bogs, and similar areas.
Wetlands have the following general diagnostic environmental characteristics:
1. Vegetation. The prevalent vegetation consists of macrophytes that are typically
adapted to areas having hydrologic and soil conditions as defined below.
Hydrophytic species have the ability to grow, effectively compete, reproduce,
and/or persist in anaerobic (saturated) soil conditions.
2. Hydrology. The area is inundated either permanently or periodically at mean
water depths less than or equal to 6.6 feet, or the soil is saturated to the surface at
some time during the growing season of the prevalent vegetation.
3. Soil. Soils are present and have been classified as hydric, or they possess
characteristics that are associated with reducing (oxygen deficient) soil
conditions.
RLK Hydro staff and Jeri Healey, Consulting Botanist, performed an onsite evaluation of
the potential wetlands on June 27, 2007. Soil evaluations were completed at ten test pit
locations where representative plant species were identified. Figure 2 (Plate #1) shows
test pit and groundwater monitoring well locations.
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Figure 2. Test Pit and Groundwater Monitoring Locations.
Wetland determinations for each test pit location are found on CE Worksheets in
Appendix A. The wetland determination was performed according to the most recent
Corps of Engineers Wetland Delineation Manual (USACE, 1987).
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Vegetation
By CE definition, to determine whether hydrophytic vegetation is present in an area,
more than 50 percent of the dominant species must be obligate wetland plants (OBL),
facultative wetland plants (FACW), or facultative plants (FAC). Dominant vegetation
was identified at each test pit. Table I displays the percent of the dominant species that
were hydrophytic at each test pit location.
Table I. Percent Hydrophytic Vegetation at Test Pit
Location
Percent
Test Pit #1
75%
Test Pit #2
75%
Test Pit #3
100%
Test Pit #4
100%
Test Pit #5
80%
Test Pit #6
50%
Test Pit #7
66%
Test Pit #8
100%
Test Pit #9
100%
Test Pit #10
100%
Hydrophytic vegetation was dominant at all test pit location except test pit #6. Further
details of the dominant species identified, test pit identification number, scientific name
and common name, and indicator status are included in Appendix B.
Hydrology
The headwaters of Trumbull Creek are in the Whitefish Range between Whitefish and
Columbia Falls. It flows south as a perennial stream until it merges with Spring Creek
just east of the subject property. Water levels in the subject reach typically represent the
shallow groundwater aquifer. The main channel has migrated in the past, leaving a
historic channel where stormwater and overflow from extreme flows in Trumbull Creek
collect. The estimated 100-year flood event has been predicted to overtop the weir -like
entrance to the historic channel. Two stormwater conveyances (possible historic
channels, which are now tributary to Trumble Creek) were also identified and
investigated for the presence of wetlands.
Within the subject property, Trumbull Creek typically has a well-defined floodplain with
steep sides and an evident channel. At the toe of the floodplain banks, water inundates
clusters of reed canary grass, while other locations appear relatively higher and
unsaturated. Vegetation identified were typically wetland grasses (FACW) that can
RLK HYDRO
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31
withstand long durations of inundation. Test pit #1 was completed on the west bank.
The test pit was not saturated and did not have any wetland hydrology indicators. In
comparison to test pit #1, test pit #2 was completed downstream at the toe of the slope;
however, water was not inundating the vegetation. Once excavation began, water seeped
from the sidewalls and inundated the test pit. These two test pits identified the riparian
wetland boundary along the west bank.
Another location, downstream near the bridge crossing, was an ideal location to compare
wetland characteristics. Water is constricted at the bridge crossing and the channel bank
is less defined. Test pit #3 was completed in tall canary grass closer to the stream than
test pit #4. Although water did not inundate test pit #3, the soil was moist. Bright
mottles were observed in this test pit indicating water often saturates the soil. Test pit #4
was completed further up the bank; reed canary grass was also dominant at this location.
This test pit did not have moist soil and did not have mottles. The influence of the
groundwater did not create a hydric soil condition within this test pit.
Test pit #5 was not completed along the main channel of Trumbull Creek; instead it was
completed in a stormwater conveyance channel that might have previously been the
active Trumbull Creek channel or an active tributary. Test pit #5 was completed in a
local low spot, which had black, silty soil. The soil was saturated and immediately water
began to seep into the test pit. Water continued to inundate the test pit up to a level six
inches below ground surface. To the north (115 feet), test pit #6 was excavated. Soils
were dry and did not have any wetland hydrology indicators. Active wetland hydrology
was only observed within this stormwater conveyance (east) around test pit #5. This is
presumably due to its location within a local low spot that is well shaded. The extent of
the wetland hydrology extends north in the stormwater conveyance past the reed canary
grass and south to where the conveyance begins to increase in elevation (this conveyance
is separated from Trumbull Creek by an earth berm).
Test pit #7 was completed in the historic channel, which in the past was probably the
active Trumbull Creek channel. A berm was created at some point in the past, which
separates the historic channel from the current flow path. As previously mentioned, this
channel carries water during the 100-year flood. Test pit #7 was excavated to 16 inches
and there was no indication that this location is typically inundated or saturated.
Relative to test pit #7, test pit #8 was located within a local low spot within the historic
channel. Birch trees near test pit #8 have a very shallow root system —that are adapted to
shallow groundwater conditions. Test pit #8 had saturated soils, and became inundated
upon completion. This local low spot does display wetland hydrology.
Test pit #9 was completed near the southeast property boundary, downstream from the
convergence of Trumbull Creek and Spring Creek. Spring Creek was previously
reconstructed (Spratt & Associates, 1992)—the current channel is now well-defined with
an obvious floodplain. Inundation was observed in sporadic locations within the
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floodplain; however, test pit #9 was not located in an inundated area. The pit excavation
contained seeping saturated soils.
Test pit #10 was excavated in the historic channel downstream from test pit #7 and test
pit #8. This location did not have saturated soils. Groundwater monitoring near this test
pit indicated that the water levels do approach the surface. All shallow groundwater
measurements observed from June to August 2007 are recorded in Appendix C.
Soils
The United States Department of Agriculture (USDA) Soil Conservation Service mapped
soils in the Upper Flathead Valley Area. An updated soil map was recently published in
2006 and is shown in Figure 3.
The seven soil types identified on the property are as follows:
1. Aa,
Alluvial land, poorly drained;
2. Be,
Birch fine sandy loam, 0 - 5 percent;
3. Kzd,
Kiwanis fine sandy loam, 0 — 4 percent slopes;
4. Kze,
Kiwanis loam, 0 — 3 percent slopes;
5. Kzg,
Kiwanis-Birch fine sandy loams, 0 — 5 percent slopes;
6. Kzh,
Kiwanis-Birch loams, 0 — 4 percent slopes; and
7. So,
Swims silt loam, 0 — 3 percent slopes.
Alluvial land (Aa) and Swims silt loam (So) have both been classified as hydric soils and
are on the Hydric Soils List for Montana (Feb 2007) published by the USDA (listed in
bold above). Alluvial land displays hydric characteristics when in floodplains (25% of all
occurrences), and Swims silt loam is hydric when poorly drained —typically occurring
within channels (2% of all occurrences). Despite previous classifications, test pits were
completed within various soil types to determine the wetland boundary within the subject
property.
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Figure 3. Soils Map
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The soil classified as alluvial land (Aa) dominates the southeast corner of the
development —downstream from where Trumbull Creek converges with Spring Creek.
Spratt & Associates completed Reconstruction of Spring Creek in 1992 through a grant
provided by the Flathead Conservation District. The channel today has a well-defined
shape with a broad floodplain. Excavation of test pit #9 revealed dark reddish brown
mottles from 4 inches to 14 inches below ground surface. A strong sulfur smell was
noted. Both indicate that this is a hydric wetland soil.
Four test pits were completed within the Kiwanis loam (Kze)— test pit #3, #4, #7, and #8.
As previously mentioned, test pit #3 and test pit #4 were excavated in close proximity in
order to identify the wetland boundary along the creek. Similar soils (ranging from
friable very fine sand to friable silt) were identified in each pit; however, test pit #3 had a
mottled layer indicating hydric conditions while test pit #4 did not.
Test pit #7 and test pit #8 were excavated within the historic channel. Test pit #7 had
homogeneous soil from 0 — 18 inches below ground surface, varying only in color. There
were no indications of hydric soils. Test pit #8 was excavated within a local low spot in
the historic channel. Shallow tree roots prohibited the excavation at an initial location.
The final test pit was relocated further to the south. The silty loam soil did not have
mottles; however, its color was classified as low chroma, which is a hydric soil indicator.
Kiwanis-Birch fine sandy loams (Kzg) border Trumbull Creek and the east stormwater
conveyance near the eastern property boundary. Hydric soil conditions were apparent
along the main channel of Trumbull Creek within this soil type. Test pit #5 and test pit
#6 were excavated in the stormwater conveyance. Soils within test pit #5 were saturated
and had bright abundant yellowish red mottles to the surface. This location within the
conveyance indicated hydric soils. To the north, test pit #6 was excavated. Soils at this
location were dramatically different from test pit #5. It was described as dry silty loam
from the surface to five inches and silty gravel beneath. Within the stormwater
conveyance, only the area near test pit #5 appeared hydric.
Test pit #1, #2, and #10 were excavated in Swims silt loam (So). Test pit #1 was
excavated on the bank, test pit #2 was at the toe of the floodplain bank, and test pit #10
was excavated in the center of the historic channel. The only test pit that indicated hydric
conditions was test pit #2. This test pit had low chroma color and became inundated.
Test pit #10 had relatively elevated organic content, but the estimated content was less
than 20% by weight. Beneath the surface soil, silt and gravel was excavated. RLK Hydro
is monitoring the shallow groundwater throughout the parcel. This gravel is connected to
the shallow groundwater aquifer and is well drained. Groundwater rose to approximately
6 inches below ground surface at test pit #10 in June. However, proximity of
groundwater did not create hydric soil conditions, and both facultative wetland (FACW)
and facultative (FAC) plants grow in the channel. Obligate plants were noted within the
historic channel upstream of test pit #10 on the neighboring parcel.
RLK HYDRO
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No test pits were excavated in the Birch fine sandy loam (Be), Kiwanis fine sandy loam
(Kzd), and the Kiwanis-Birch loams (Kzh) within the property. Delineation boundaries at
the test pit locations were used to interpolate wetland boundaries between test pits. The
west stormwater conveyance located in the Kiwanis fine sandy loam lacked wetland
vegetation, thus the soils were not examined.
Wetland Determinations
As previously mentioned, wetlands as defined by the CE must contain hydrophytic
vegetation, wetland hydrology, and hydric soil. Table II includes a review of these
characteristics for each test pit and the subsequent wetland determination.
Table II. Wetland Characteristic at each Test Pit Location
Vegetation Hydrology Soil Wetland
Test Pit #1
Test Pit #2
Test Pit #3
Test Pit #4
Test Pit #5
Test Pit #6
Test Pit #7
Test Pit #8
Test Pit #9
Test Pit #10
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
All three wetland characteristics were observed at test pit locations #2, #3, #5, #8, and #9.
These sites are located within the Trumbull Creek floodplain, the historic channel, or the
stormwater conveyance. The total delineated wetland with in the 140.5-acre parcel is
6.23 acres. Appendix E includes an aerial photo overlaid with the riparian wetland
boundary, soil boundaries, and test pit and monitoring well locations. Plate #1 includes
this same information in a larger format.
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Jurisdictional Criteria
The CE jurisdiction for wetlands was defined further by two critical U.S. Supreme Court
decisions.
First the SWANCC decision (2001) from the U.S. Supreme Court eliminates CWA
jurisdiction over isolated, intrastate, non -navigable waters where the sole basis for
asserting CWA jurisdiction is the actual or potential use of the waters as habitat for
migratory birds that cross state lines in their migrations. Secondly, the Rapanos decision
from the U.S. Supreme Court (2006) requires a determination of a "significant nexus" for
a jurisdiction determination.
Under the Rapanos decision, agencies, including the USACE, will not assert jurisdiction
over 1) swales or erosional features and 2) ditches excavated wholly in and draining only
uplands and that do carry a relatively permanent flow of water (USACE, 2007).
Based upon these court decisions, two wetland areas within Trumbull Creek Crossing,
Phase II are non -jurisdictional wetlands. These areas are within the historic channel
(0.46 acre) and the east stormwater conveyance (0.07 acre). Appendix E includes a map
of these non -jurisdictional wetlands. CE Jurisdictional wetlands on the subject property
include the wetlands delineated along Trumbull Creek (4.45 acre) and Spring Creek (0.61
acre). Figure 4 displays these areas that are CE Jurisdictional Wetlands. Plate #3
includes this same information in a larger format.
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Contourinterval=7'
sOictlonal Wetlands
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LB REVISION: Kalispell, Montane 59903
BY: REVISION: (.),52-2025 FA (405)2514
Figure 4. Jurisdictional Wetlands
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References
Berglund, J., 1999, MDT Montana Wetland Assessment Method, Montana Department of
Transportation and Morrison-Maierle, Inc., Helena, MT.
Code of Federal Regulations, 33 CFR Part 323, General Regulatory Policies United
States Army Corps of Engineers
Code of Federal Regulations, 33 CFR Part 328 — Definition of Waters of the United
States
Code of Federal Regulations, 33 CFR Part 329 — Definition of Navigable Waters of the
U.S.
Cooper, S.V. and W.M. Jones, A plant community classification for Kootenai National
Forest Peatlands, Montana Natural Heritage Program, Natural Resource Information
System, Montana State Library, Helena, Montana.
Cowardin, L.M. et al., 1979, Classification of Wetlands and Deepwater Habitats of the
United States, U.S. Department of the Interior, Fish and Wildlife Service, Office of
Biological Services, Washington, D.C.
Flathead County, New Subdivision Regulations, Flathead County Development Code
Planning and Zoning Department, 2007, Flathead County, Montana
FWP, 2005, Montana's Comprehensive Fish and Wildlife Conservation Strategy,
Montana Fish, Wildlife & Parks, Helena, MT
Hansen, P.L., S.W. Chadde, and R.D. Pfister, 1988, Riparian dominance types of
Montana, Misc. Publ. 49, Montana Forest and Conservation Experiment Station, School
of Forestry, University of Montana, Missoula, MT.
Spratt & Associates, Feb. 6, 1992, Rehabilitation of East Spring Creek Final Report,
Flathead Conservation District, DHES Contract 210062, Kalispell, MT.
United States Department of Agriculture, Natural Resource Conservation Service, Hydric
Soils List for the State of Montana, NRCS Website 2006
United States Department of Agriculture, Natural Resource Conservation Service, Partial
Soil Survey Geographic (SSURGO) Database for Flathead County Area and Part of
Lincoln County, Montana, 2006
United States Department of Army, Corps of Engineers Wetlands Delineation Manual
Online Edition, January 1987, Vicksburg, MS
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APPENDIX A
Army Core of Engineer Wetland Determination Worksheets
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DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Delineation Manual)
te:
Trumbull Creek Crossing, Phase II
Date:
June 27, 2007
/Owner: NW Dev Grou , LLC
Count Flathead
or:
Mikel Siemens, RLK Hydro; Jeri Healey, Consuling Botanist
State:
Montana
al Circumstances exist on the site?
F
X
Yes
No
COMMUNITY ID:
Ri arian
si nificantl disturbed At ical Situation ?
Yes
No
X
Transect ID:
a a potential Problem Area?
Yes
No
X
PLOT ID:
#1
ed, explain on reverse.)
1A
Dominant Plant Species
Stratum
Indicator
Dominant Plant Species
Stratum
Indicator
1.
Phalaris arundinacea
H.U.
FACW
9.
2.
Prunus vir iniana
W.U.
FAC
10.
3.
Cratae us dou lasii
W.U.
FAC
11.
4.
Dact lis glomerata
H.U.
FACU
12.
5.
13.
7.
15.
8.
16.
Percent of Dominant Species that are OBL, FACW or FAC
(excluding FAC-).
75%
Remarks:
HYDROLOGY
Recorded Data Describe in Remarks):
Wetland Hydrology Indicators:
Stream, Lake or Tide Gauge
Primary Indicators:
Aerial Photographs
Inundated
Other
Saturated In Upper 12 Inches
No Recorded Data Available
Water Marks
Drift Lines
Sediment Deposits
Field Observations:
Drainage Patterns in Wetlands
Secondary Indicators 2 or more required):
Depth of Surface Water:
>0"
(In.)
Oxidized Root Channels in Upper 12 inchcs
Water -Stained Leaves
Depth of Free Water in Pit:
>0"
(In.)
Local Soil Survey Data
FAC-Neutral Test
Depth to Saturated Soil:
>16"
(hi.)
Other (Explain in Remarks
Remarks: No wetland hydrology indicators.
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SOILS
Map Unit Name: Swims silt loam, 0 to 3% slopes
Series and Phase):
Swims series
Drainage Class:
Moderately well drained
Field Observations
Taxonomy Sub rou :
Medium textured alluvium
Confirm Mapped Type? X I Yes yo
Profile Description:
Depth
Matrix Color
Mottle Colors
Mottle Abundance/
Texture, Concretions,
(inches) Horizon (Munsell Moist)
(Munsell Moist)
Size/contrast
Structure, etc.
0" — 12" O & A (10 YR 3/2) None
V. dark grayish brown
NA
Organic detritus, silty fine
sand, friable
12" — 16"
g (10 YR 4/4) None
Dark yellowish brown
NA
Friable, silty fine sand
Hydric Soil Indicators:
Histosol
Concretions
Histic Epipedon
High Organic Content in Surface Layer in Sandy Soils
Sulfrdic Odor
Organic Streaking in Sandy Soils
Aquic Moisture Regime
X
Listed on Local Hydric Soils List
Reducing Conditions
Listed on National Hydric Soils List
Gleyed or Low-Chroma Colors
Other (Explain in Remarks)
Remarks: Swims silt loam has been listed on the local hydric soils list, although hydric conditions exist only 2% of the time. The elevational
difference from the stream channel to the test pit location along the stream channel bank is sufficient to allow soil drainage. This location
does not indicate hydric soil conditions.
WETLAND DETERMINATION
H dro h tic Vegetation Present? X
Yes
No
Wetland Hydrology Present?
Yes
No
X
Hydric Soils Present?
Yes
No
X
Is this Sam lin Point Within a Wetland?
Yes
I No X
Remarks: The test pit location, on the scarp of Trumbull Creek, is not a wetland.
RLK HYDRO
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17
DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Delineation Manual)
te:
Trumbull Creek Crossing, Phase II
Date:
June 27, 2007
/Owner: NW Dev Grou , LLC
Count Flathead
or:
Mikel Siemens, RLK Hydro; Jeri Healey, Consuling Botanist
State:
Montana
al Circumstances exist on the site?
F
X
Yes
No
COMMUNITY ID:
Ri arian
si nificantl disturbed At ical Situation ?
Yes
No
X
Transect ID:
a a potential Problem Area?
Yes
No
X
PLOT ID:
#2
ed, explain on reverse.)
1A
Dominant Plant Species
Stratum
Indicator
Dominant Plant Species
Stratum
Indicator
1.
Phalaris arundinacea
H.U.
FACW
9.
2.
E uisetum arvense
H.U.
FAC
10.
3.
Betula occidentalis
W.U.
FACW
11.
4.
Dact lis lomerata
H.U.
FACU
12.
5.
13.
6.
14.
7.
15.
8.
16.
Percent of Dominant Species that are OBL, FACW or FAC
(excluding FAC-).
75%
Remarks:
HYDROLOGV
Recorded Data Describe in Remarks):
Wetland Hydrology Indicators:
Stream, Lake or Tide Gauge
Primary Indicators:
Aerial Photographs
Inundated
Other
X
Saturated In Upper 12 Inches
X
No Recorded Data Available
Water Marks
Drift Lines
Sediment Deposits
Field Observations:
Drainage Patterns in Wetlands
Secondary Indicators 2 or more required):
Depth of Surface Water:
0"
(In.)
X
Oxidized Root Channels in Upper 12 inchcs
Water -Stained Leaves
Depth of Free Water in Pit:
0"
X
Local Soil Survey Data
FAC-Neutral Test
Depth to Saturated Soil:
8"
(hi.)
Other (Explain in Remarks
Remarks: The location was completed in a dense grassy area where surface water was visible immediately near the pit. The soils
within the test pit seeped water, although the pit was never inundated. This soil texture was so tight that the required length of
time to observe the free water in pit not reached.
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IV.,
SOILS
Map Unit Name: Swim silt loam, 0 to 3% slopes
Series and Phase):
Swim Series
Drainage Class:
Moderately well drained
Field Observations
Taxonomy Sub rou : Medium textured alluvium
Confirm Mapped Type?
X I Yes I No
Profile Description:
Depth
Matrix Color
Mottle Colors
Mottle Abundance/
Texture, Concretions,
(inches) Horizon
(Munsell Moist)
(Munsell Moist)
Size/contrast
Structure, etc.
0" — 2" O
(10 YR 2/1)
Black
None
NA
Loam
2" — 6" A
(10 YR 3/2)
Very dark grayish brown
None
NA
Silty loam, friable
6" — 10" A
(10 YR 4/2)
Dark grayish brown
(7.5 YR 5/6)
Strong brown
Abrupt boundary, large
abundant mottles
Silt with fine sand, friable
10" — 17> B
(10 YR 3/3)
Dark brown
None
NA
Silt, plastic, blocky
Hydric Soil Indicators:
Histosol
Concretions
Histic Epipedon
High Organic Content in Surface Layer in Sandy Soils
Sulfrdic Odor
Organic Streaking in Sandy Soils
X
Aquic Moisture Regime
X
Listed on Local Hydric Soils List
X
Rcducing Conditions
Listed on National Hydric Soils List
Gleyed or Low-Chroma Colors
LOther
(Explain in Remarks)
Remarks: Swims silt loam has been listed on the local hydric soils list, although hydric conditions exist only 2% of the timc. This tcst pit is
located in the Trumbull Creek channel is included in the hydric soil conditions associated with Swims soils.
WETLAND DETERMINATION
H dro h tic Vegetation Present? X
Yes
No
Wetland Hydrology Present? X
Yes
No
Hydric Soils Present? X
Yes
No
Is this Sampling Point Within a Wetland? X I
Yes
I No
Remarks: This test pit location is within Trumbull Creek channel and all three wetland parameters were apparent.
RLK HYDRO
I N C
19
DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Delineation Manual)
te:
Trumbull Creek CrossingPhase I1
Date:
June 27, 2007
/Owner: NW Dev Grou , LLC
Count Flathead
or:
Mikel Siemens, RLK Hydro; Jeri Healey, Consuling Botanist
State:
Montana
al Circumstances exist on the site?
F
X
Yes
No
COMMUNITY ID:
Ri arian
si nificantl disturbed At ical Situation ?
Yes
No
X
Transect ID:
a a potential Problem Area?
Yes
No
X
PLOT ID:
#3
ed, explain on reverse.)
1A
Dominant Plant Species
Stratum
Indicator
Dominant Plant Species
Stratum
Indicator
1.
Phalaris arundinacea
H.U.
FACW
9.
2.
E uisetum arvense
H.U.
FAC
10.
3.
Betula papyrifera
W.O.
FAC
11.
4.
12.
5.
13.
6.
14.
7.
15.
8.
16.
Percent of Dominant Species that are OBL, FACW or FAC
(excluding FAC-).
100%
Remarks:
HVDROIIOGV
Recorded Data Describe in Remarks):
Wetland Hydrology Indicators:
Stream, Lake or Tide Gauge
Primary Indicators:
Aerial Photographs
Inundated
Other
Saturated In Upper 12 Inches
No Recorded Data Available
Water Marks
Drift Lines
Sediment Deposits
Field Observations:
Drainage Patterns in Wetlands
Secondary Indicators 2 or more required):
Depth of Surface Water:
0"
(In.)
Oxidized Root Channels in Upper 12 inchcs
Water -Stained Leaves
Depth of Free Water in Pit:
0"
(In.)
X
Local Soil Survey Data
FAC-Neutral Test
Depth to Saturated Soil:
>181,
(hi.)
X
Other (Explain in Remarks
Remarks: Mottles indicate the soils become saturated long enough to create hydric conditions. An onsite inspection in early May
could forseeably have had seeping, saturated soils in upper 12" of test pit.
RLK HYDRO
I N C
20
SOILS
Map Unit Name: Kiwanis loam, 0 to 3% slopes
Series and Phase):
Kiwanis series
Drainage Class:
Moderately well drained
Field Observations
Taxonomy (Subgroup):
Medium and moderately course textured alluvium
Confirm Mapped Type'? I
X I Ycs No
Profile Description:
Depth I
Matrix Color
Mottle Colors
Mottle Abundance/
Texture, Concretions,
(inches) Horizon (Munsell Moist)
(Munsell Moist)
Size/contrast
Structure, etc.
0" — 7" O & A (10 YR 2/2)
Very dark brown
None
NA
Nonplastic, silt loam,
block
7" — 10"
A (10 YR 3/3)
Dark brown
(7.5 YR 4/4)
Brown
Abundant, abrupt,
large
Friable, silt
10" — 18"
B (10 YR 5/3)
Brown
None
NA
Silty fine sand
Hydric Soil Indicators:
Histosol
Concretions
Histic Epipedon
High Organic Content in Surface Layer in Sandy Soils
Sulfrdic Odor
Organic Streaking in Sandy Soils
Aquic Moisture Regime
Listed on Local Hydric Soils List
X
Rcducing Conditions
Listed on National Hydric Soils List
Gleyed or Low-Chroma Colors
LOther
(Explain in Remarks)
Rcmarks: This tcst pit location docs indicatc hydric soils conditions.
WETLAND DETERMINATION
H dro h tic Vegetation Present? X
Yes
No
Wetland Hydrology Present? X
Yes
No
Hydric Soils Present? X
Yes
No
Is this Sampling Point Within a Wetland? X I
Yes
I No
Remarks: Test Pit #3 and Test Pit #4 were completed in close proximity of each other to determine if the predicted wetland boundary was
physically observed. Test Pit #3 has been determined to be in the wetland.
RLK HYDRO
I N C
21
DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Delineation Manual)
te:
Trumbull Creek CrossingPhase I1
Date:
June 27, 2007
/Owner: NW Dev Grou , LLC
Count Flathead
or:
Mikel Siemens, RLK Hydro; Jeri Healey, Consuling Botanist
State:
Montana
al Circumstances exist on the site?
F
X
Yes
No
COMMUNITY ID:
Ri arian
si nificantl disturbed At ical Situation ?
Yes
No
X
Transect ID:
a a potential Problem Area?
Yes
No
X
PLOT ID:
#4
ed, explain on reverse.)
1A
Dominant Plant Species
Stratum
Indicator
Dominant Plant Species
Stratum
Indicator
1.
Phalaris arundinacea
H.U.
FACW
9.
2.
E uisetum arvense
H.U.
FAC
10.
3.
Betula papyrifera
W.O.
FAC
11.
4.
12.
5.
13.
6.
14.
7.
15.
8.
16.
Percent of Dominant Species that are OBL, FACW or FAC
(excluding FAC-).
1001",
Remarks:
HVDROIIOGV
Recorded Data Describe in Remarks):
Wetland Hydrology Indicators:
Stream, Lake or Tide Gauge
Primary Indicators:
Aerial Photographs
Inundated
Other
Saturated In Upper 12 Inches
X
I No Recorded Data Available
Water Marks
Drift Lines
Sediment Deposits
Field Observations:
Drainage Patterns in Wetlands
Secondary Indicators 2 or more required):
Depth of Surface Water:
0"
(In.)
Oxidized Root Channels in Upper 12 inchcs
Water -Stained Leaves
Depth of Free Water in Pit:
0"
(In.)
Local Soil Survey Data
FAC-Neutral Test
Depth to Saturated Soil:
>16"
(hi.)
Other (Explain in Remarks
Remarks: Hydrology within this test pit is not influenced by Trumbull Creek stream channel.
RLK HYDRO
I N C
22
SOILS
Map Unit Name: Kiwanis loam, 0 to 3% slopes
Series and Phase):
Kiwanis series
Drainage Class:
Well drained
Field Observations
Taxonomy (Subgroup): Medium and moderately course textured alluvium
Confirm Mapped Type? I X I Yes No
Profile Description:
De th Matrix Color
Mottle Colors Mottle Abundance/ Texture, Concretions,
(inches) Horizon
(Munsell Moist)
(Munsell Moist)
Size/contrast
Structure, etc.
0" — 16" O & A
(10 YR 4/3)
Brown
None
NA
Friable, very fine sand
Hydric Soil Indicators:
Histosol
Concretions
Histic Epipedon
High Organic Content in Surface Layer in Sandy Soils
Sulfidic Odor
Organic Streaking in Sandy Soils
Aquic Moisture Regime
Listed on Local Hydric Soils List
Reducing Conditions
Listed on National Hydric Soils List
Gleyed or Low-Chroma Colors
Other (Explain in Remarks)
Rcmarks:
WETLAND DETERMINATION
H dro h tic Vegetation Present? X
Yes
No
Wetland Hydrology Present?
Yes
No
X
Hydric Soils Present?
Yes
No
X
is this Sam lin Point Within a Wetland?
Yes,
I No X
Remarks: Test Pit #3 and Test Pit #4 were completed in close proximity of each other to determine if the predicted wetland boundary
corresponds to a change to hydric soil. Test Pit #4 has not been determined to be in the wetland and the change in elevation did depict the
riparian wetland boundary.
RLK HYDRO
I N C
23
DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Delineation Manual)
te:
Trumbull Creek CrossingPhase I1
Date:
June 27, 2007
/Owner: NW Dev Grou , LLC
Count Flathead
or:
Mikel Siemens, RLK Hydro; Jeri Healey, Consuling Botanist
State:
Montana
al Circumstances exist on the site?
F
X
Yes
No
COMMUNITY ID:
Ri arian
si nificantl disturbed At ical Situation ?
Yes
No
X
Transect ID:
a a potential Problem Area?
Yes
No
X
PLOT ID:
#5
ed, explain on reverse.)
1A
Dominant Plant Species
Stratum
Indicator
Dominant Plant Species
Stratum
Indicator
1.
Dact lis lomerata
H.U.
FACU
9.
2.
Catabrosa a uatica
H.U.
OBL
10.
3.
Carex micro tera
H.U.
FAC
11.
4.
Carex arcta
H.U.
OBL
12.
5.
Cratae us dou lasii
W.U.
FAC
13.
6.
14.
7.
15.
8.
16.
Percent of Dominant Species that are OBL, FACW or FAC
(Excluding FAC-).
80%
Remarks:
HYDROLOGV
Recorded Data Describe in Remarks):
Wetland Hydrology Indicators:
Stream, Lake or Tide Gauge
Primary Indicators:
Aerial Photographs
X
Inundated
Other
X
Saturated In Upper 12 Inches
No Recorded Data Available
Water Marks
Drift Lines
Sediment Deposits
Field Observations:
Drainage Patterns in Wetlands
Secondary Indicators 2 or more required):
Depth of Surface Water:
0"
(In.)
X
Oxidized Root Channels in Upper 12 inchcs
Water -Stained Leaves
Depth of Free Water in Pit:
6"
(In.)
Local Soil Survey Data
FAC-Neutral Test
Depth to Saturated Soil:
1"
(hi.)
Other (Explain in Remarks
Remarks: Soils seeped water when pit was constructed; after the water level reached equilibrium, water depth was six inches
deep.
RLK HYDRO
I N C
24
SOILS
Map Unit Name: Kiwanis-Birch fine sandy loams,
0 to 5% slopes
Series and Phase):
Kiwanis series
Drainage Class:
Well drained
Field Observations
Taxonomy (Subgroup): Medium and moderately course textured alluvium
Confirm Mapped Type? I X I Yes No
Profile Description:
Depth I Matrix Color
Mottle Colors
Mottle Abundance/
Texture, Concretions,
(inches)
Horizon (Munsell Moist)
(Munsell Moist)
Size/contrast
Structure, etc.
0" — 7"
O & A (10 YR 2/1)
Black
(5 YR 4/6)
Yellowish red
Apparent, abrupt,
large
Silty, highly organic,
heavily decomposed, block
7" — 9"
A (10 YR 5/4)
Yellowish brown
None
NA
Nonplastic, friable, silt,
block
9" — 17"
C (5 Y 4/1)
Dark gray
(5 YR 4/6)
Yellowish red
Apparent, abrupt,
large
Nonplastic, friable, silt,
block
Histosol Concretions
Histic Epipedon High Organic Content in Surface Layer in Sandy Soils
Sulfidic Odor Organic Streaking in Sandy Soils
Aquic Moisture Regime Listed on Local Hydric Soils List
X Reducing Conditions Listed on National Hydric Soils List
X Gleyed or Low-Chroma Colors Other (Explain in Remarks)
Remarks:
WETLAND DETERMINATION
H dro h tic Vegetation Present? X
Yes
No
Wetland Hydrology Present? X
Yes
No
Hydric Soils Present? X
Yes
No
Is this Sampling Point Within a Wetland? X I
Yes
I No
Remarks: This test pit location appears to be in a local low spot in the historic stream channel. The tree canopy minimizes natural light
and provides an abundance of organic material for decomposition, creating the nutrient rich soils.
RLK HYDRO
I N C
25
DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Delineation Manual)
te:
Trumbull Creek CrossingPhase I1
Date:
June 27, 2007
/Owner: NW Dev Grou , LLC
Count Flathead
or:
Mikel Siemens, RLK Hydro; Jeri Healey, Consuling Botanist
State:
Montana
al Circumstances exist on the site?
F
X
Yes
No
COMMUNITY ID:
Ri arian
si nificantl disturbed At ical Situation ?
Yes
No
X
Transect ID:
a a potential Problem Area?
Yes
No
X
PLOT ID:
#6
ed, explain on reverse.)
1A
Dominant Plant Species
Stratum
Indicator
Dominant Plant Species
Stratum
Indicator
1.
Dact lis lomerata
H.U.
FACU
9.
2.
Symphoricarpos albus
W.U.
FACU
10.
3.
Cratae us dou lasii
W.U.
FAC
11.
4.
Betula papyrifera
W.O.
FAC
12.
5.
13.
6.
14.
7.
15.
8.
16.
Percent of Dominant Species that are OBL, FACW or FAC
(excluding FAC-).
50%
Remarks:
HYDROLOGV
Recorded Data Describe in Remarks):
Wetland Hydrology Indicators:
Stream, Lake or Tide Gauge
Primary Indicators:
Aerial Photographs
Inundated
Other
Saturated In Upper 12 Inches
No Recorded Data Available
Water Marks
Drift Lines
Sediment Deposits
Field Observations:
Drainage Patterns in Wetlands
Secondary Indicators 2 or more required):
Depth of Surface Water:
0"
(In.)
Oxidized Root Channels in Upper 12 inchcs
Water -Stained Leaves
Depth of Free Water in Pit:
0"
(In.)
Local Soil Survey Data
FAC-Neutral Test
Depth to Saturated Soil:
>16"
(hi.)
Other (Explain in Remarks
Remarks: Although connected to same historic stream channel as Test Pit #5, this locationis outside the local low spot. Water
entering the channel is well drained through the silty gravels.
RLK HYDRO
I N C
26
SOILS
Unit Name: Kiwanis-Birch fine sar
es and Phase): I Kiwanis series
nomv (Suberoun): I Medium and
Profile Descrintion
0 to 5% slopes
Drainage Class: Well drained
Field Observations
v course textured alluvium Confirm Manned Tvne? X Yes
Depth Matrix Color
Mottle Colors Mottle Abundance/ I Texture, Concretions,
(inches) Horizon
(Munsell Moist)
(Munsell Moist)
Size/contrast
Structure, etc.
0" — 5" O & A
(10 YR 3/1)
Very dark gray
None
NA
Silty loam, structureless,
plastic, friable
5" — 16" A & C
(10 YR 2/1)
Black
None
NA
Silty gravel
Hydric Soil Indicators:
Histosol
Concretions
Histic Epipedon
High Organic Content in Surface Layer in Sandy Soils
Sulfrdic Odor
Organic Streaking in Sandy Soils
Aquic Moisture Regime
Listed on Local Hydric Soils List
Reducing Conditions
Listed on National Hydric Soils List
Gleyed or Low-Chroma Colors
Other (Explain in Remarks)
Rcmarks: Gravcl bclow top horizons containcd round cobblcs from historic bcd load of rivcr.
WETLAND DETERMINATION
H dro h tic Vegetation Present?
Yes
No
X
Wetland Hydrology Present?
Yes
No
X
Hydric Soils Present?
Yes
No
X
Is this Sam lin Point Within a Wetland?
Yes
I No X
Remarks: Spring runoff can conceivably drain through the historical river channel from Test Pit #6 to Test Pit #5. However, the cobbles at
this location increase the drainage capacity and are well drained. Further north of this test pit, the upland vegetation continues to dominate
the historic channel.
RLK HYDRO
I N C
27
DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Delineation Manual)
te:
Trumbull Creek CrossingPhase I1
Date:
June 27, 2007
/Owner: NW Dev Grou , LLC
Count Flathead
or:
Mikel Siemens, RLK Hydro; Jeri Healey, Consuling Botanist
State:
Montana
al Circumstances exist on the site?
F
X
Yes
No
COMMUNITY ID:
Ri arian
si nificantl disturbed At ical Situation ?
Yes
No
X
Transect ID:
a a potential Problem Area?
Yes
No
X
PLOT ID:
#7
ed, explain on reverse.)
1A
Dominant Plant Species
Stratum
Indicator
Dominant Plant Species
Stratum
Indicator
1.
Phalaris arundinancea
H.U.
FACW
9.
2.
Festusca pratensis
H.U.
FACU+
10.
3.
Cratae us dou lasii
W.U.
FAC
11.
4.
12.
5.
13.
6.
14.
7.
15.
8.
16.
Percent of Dominant Species that are OBL, FACW or FAC
(excluding FAC-).
66%
Remarks:
HYDROLOGV
Recorded Data Describe in Remarks):
Wetland Hydrology Indicators:
Stream, Lake or Tide Gauge
Primary Indicators:
Aerial Photographs
Inundated
Other
Saturated In Upper 12 Inches
No Recorded Data Available
Water Marks
Drift Lines
Sediment Deposits
Field Observations:
Drainage Patterns in Wetlands
Secondary Indicators 2 or more required):
Depth of Surface Water:
0"
(In.)
X
Oxidized Root Channels in Upper 12 inchcs
Water -Stained Leaves
Depth of Free Water in Pit:
0"
Local Soil Survey Data
FAC-Neutral Test
Depth to Saturated Soil:
>16"
(hi.)
Other (Explain in Remarks
Remarks:
RLK HYDRO
I N C
-)8
SOILS
Map Unit Name: Kiwanis loam, 0 to 3% slopes
Series and Phase):
Kiwanis series
Drainage Class:
Well drained
Field Observations
Taxonomy (Subgroup):
Medium and moderately course textured alluvium
Confirm Mapped Type'?
I X I Ycs No
Profile Description:
Depth I
Matrix Color
Mottle Colors
Mottle Abundance/
Texture, Concretions,
(inches) Horizon (Munsell Moist)
(Munsell Moist)
Size/contrast
Structure, etc.
0" — 8" O & A (10 YR 3/2)
Very dark grayish brown
None
NA
Loamy silty fine sand,
slightly lastic
8" — 18" A & C (10 YR 2/1)
Black
None
NA
Loamy silt, plastic, friable
Hydric Soil Indicators:
Histosol
Concretions
Histic Epipedon
High Organic Content in Surface Layer in Sandy Soils
Sulfrdic Odor
Organic Streaking in Sandy Soils
Aquic Moisture Regime
Listed on Local Hydric Soils List
Reducing Conditions
Listed on National Hydric Soils List
Gleyed or Low-Chroma Colors
Other (Explain in Remarks)
Rcmad<s:
WETLAND DETERMINATION
H dro h tic Vegetation Present? X
Yes
No
Wetland Hydrology Present?
Yes
No
X
Hydric Soils Present?
Yes
No
X
Is this Sam lin Point Within a Wetland?
Yes
I No X
Remarks: This test pit location is in a historic channel that may carry water during high flows. Current conditions indicate this location is
not a wetland.
RLK HYDRO
I N C
29
DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Delineation Manual)
te:
Trumbull Creek CrossingPhase I1
Date:
June 27, 2007
/Owner: NW Dev Grou , LLC
Count Flathead
or:
Mikel Siemens, RLK Hydro; Jeri Healey, Consuling Botanist
State:
Montana
al Circumstances exist on the site?
F
X
Yes
No
COMMUNITY ID:
Ri arian
si nificantl disturbed At ical Situation ?
Yes
No
X
Transect ID:
a a potential Problem Area?
Yes
No
X
PLOT ID:
#8
ed, explain on reverse.)
1A
Dominant Plant Species
Stratum
Indicator
Dominant Plant Species
Stratum
Indicator
1.
Phalaris arundinacea
H.U.
FACW
9.
2.
E uisetum arvense
W.U.
FAC
10.
3.
Cratae us dou lasii
W.U.
FAC
11.
4.
Salix spp.
W.U.
FACW
12.
5.
Po ulus balsamifera
W.O.
FAC
13.
6.
Betula papyrifera
W.O.
FAC
14.
7.
15.
8.
16.
Percent of Dominant Species that are OBL, FACW or FAC
(excluding FAC-).
1001"'
Remarks:
HYDROLOGV
Recorded Data Describe in Remarks):
Wetland Hydrology Indicators:
Stream, Lake or Tide Gauge
Primary Indicators:
Aerial Photographs
Inundated
Other
X
Saturated In Upper 12 Inches
No Recorded Data Available
Water Marks
Drift Lines
Sediment Deposits
Field Observations:
Drainage Patterns in Wetlands
Secondary Indicators 2 or more required):
Depth of Surface Water:
0"
(In.)
Oxidized Root Channels in Upper 12 inchcs
Water -Stained Leaves
Depth of Free Water in Pit:
6"
(In.)
Local Soil Survey Data
FAC-Neutral Test
Depth to Saturated Soil:
4"
(hi.)
Other (Explain in Remarks
Remarks: This test pit is located in the historic stream channel, and is a local low spot which water drains to during snowmelt
and rain events. This corresponds to the saturated soils found in the test pit.
RLK HYDRO
I N C
30
SOILS
Map Unit Name: Kiwanis loam, 0 to 3% slopes
Series and Phase):
Kiwanis series
Drainage Class:
Well drained
Field Observations
Taxonomy (Subgroup):
Medium and moderately course textured alluvium
Confirm Mapped Type'?
Ycs No
Profile Description:
De th
Matrix Color
Mottle Colors
Mottle Abundance/
Texture, Concretions,
(inches) Horizon
(Munsell Moist)
(Munsell Moist)
Size/contrast
Structure, etc.
0" — 3"
O
(5YR2.5/1)
Black
None
NA
Silt loam, friable, roots
3" — 10"
A
(10YR3/2)
V. dark grayish brown
None
NA
Silt loam, slightly plastic,
roots, friable
10" — 16" A & B
(10YR4/1)
Dark gray
None
NA
Silt, sticky, plastic
Hydric Soil Indicators:
Histosol
Concretions
Histic Epipedon
High Organic Content in Surface Layer in Sandy Soils
Sulfrdic Odor
Organic Streaking in Sandy Soils
Aquic Moisture Regime
Listed on Local Hydric Soils List
Reducing Conditions
Listed on National Hydric Soils List
X
Gleyed or Low-Chroma Colors
Other (Explain in Remarks)
Rcmad<s:
WETLAND DETERMINATION
H dro h tic Vegetation Present? X
Yes
No
Wetland Hydrology Present? X
Yes
No
Hydric Soils Present? X
Yes
No
Is this Sampling Point Within a Wetland? X I
Yes
I No
Remarks: The wetland boundary around this test pit is evaluated from the extent of hydrcc vegetation and the low elevation area.
RLK HYDRO
I N C
31
DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Delineation Manual)
Project/Site:
Trumbull Creek Crossing., Phase II
Date:
June 27, 2007
A licant/Owner: NW Dev Group, LLC
County:Flathead
Investigator:
Mikel Siemens, RLK Hydro; Jeri Healey, Consuling Botanist
State:
Montana
Do Normal Circumstances exist on the site?
X
Yes
No
COMMUNITY
ID:
Riparian
is the site significantlydisturbed (Atypical Situation ?
Yes
No
X
Transect ID:
Isthe area a potential Problem Area?
Yes
No
X
PLOT ID:
#9
(If needed , explain on reverse.)
IA
Dominant Plant Species
Stratum
Indicator
Dominant Plant Species
Stratum
Indicator
1.
Phalaris arundinacea
H.U.
FACW
9.
2.
E uisetum arvense
H.U.
FAC
10.
3.
Betula occidentalis
W.U.
FACW
11.
4.
Po ulus balsamifera
W.O.
FAC
12.
5.
Carex arcta
H.U.
OBL
13.
6.
14.
7.
15.
8.
16.
Percent of Dominant Species that are OBL, FACW or FAC
(excluding FAC-).
100%
Remarks:
V. [•113ILTO CItTl11
Recorded Data Describe in Remarks):
AVctland Hydrology Indicators:
Stream, Lake or Tide Gauge
Primary Indicators:
Aerial Photographs
Inundated
Other
X
Saturated In Upper 12 Inches
X
No Recorded Data Available
Water Marks
Drift Lines
Sediment Deposits
Field Observations:
Drainage Patterns in Wetlands
Secondary Indicators (2 or more required):
Depth of Surface Water:
0"
In.
Oxidized Root Channels in Upper 12 inches
Water -Stained Leaves
Depth of Free Water in Pit:
0"
In.
Local Soil Survey Data
X
FAC-Neutral Test
Depth to Saturated Soil:
6'"
In.
Other (Explain in Remarks
Remarks:
RLK HYDRO
I N C
32
SOILS
Map Unit Name: Kiwanis fine sandy loam, 0 to 4 percent slopes
(Series and Phase): F (Kiwanis series) Drainage Class: I Well drained
Field Observations
Taxonomv (Suberoun): Confirm Manned Tyne? I X I Yes No
Profile Description
Depth
Matrix Color
Mottle Colors
Mottle Abundance/
Texture, Concretions,
(inches)
Horizon
(Munsell Moist)
(Munsell Moist)
Size/contrast
Structure, etc.
0" — 4"
O
(10 YR 2/2)
None
NA
Silty loam,
Very dark brown
structureless, very
4" — 14"
A
(10 YR 4/2)
(5YR3/4)
Abundant, large
Silt, very plastic
Dark grayish brown
Dark reddishbrown
14"— 16"
A & B
(10 YR 3/1)
None
NA
Silt very lastic
y' p
Very dark grav
Hydric Soil Indicators:
Histosol
Concretions
Histic Epipedon
High Organic Content in Surface Layer in Sandy Soils
X
Sulfrdic Odor
Organic Streaking in Sandy Soils
Aquic Moisture Regime
Listed on Local Hydric Soils List
X
Rcducing Conditions
j Listed on National Hydric Soils List
Gleyed or Low-Chroma Colors
Other (Explain in Remarks)
Remarks: In the open atmosphere, downstream of the test pit location, there was a strong smell of sulphur.
WETLAND DETERMINATION
H dro h tic Vegetation Present? X
Yes
No
Wetland Hydrology Present? X
Yes
No
Hydric Soils Present? X
Yes
No
Is this Sampling Point Within a Wetland? X I
Yes
I No
Remarks: This test pit is downstream of the convergence of Trumbull Creek and Spring Creek. The delineated boundary follows the toe
of the floodplain boundary.
RLK HYDRO
I N C
33
DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Delineation Manual)
Project/Site:
Trumbull Creek Crossing, Phase II
Date:
June 27, 2007
Applicant/Owner: NW Dev Group, LLC
County: Flathead
Investigator:
Mikel Siemens, RLK Hydro; Jeri Healey, Consuling Botanist
State:
Montana
Do Normal Circumstances exist on the site?
X
Yes
No
COMMUNITY
ID:
Riparian
I the site significantly disturbed (Atypical Situation)?
Yes
No
X
Transect ID:
Is the area a potential Problem Area?
Yes
No
X
PLOT ID:
#10
(If needed, explain on reverse.)
VEGETATION
Dominant Plant Species
Stratum
Indicator
Dominant Plant Species
Stratum
Indicator
1.
Phalaris arundinancea
H.U.
FACW
9.
2.
Carex spp.
H.U.
FAC
10.
3.
E uisetum arvense
H.U.
FAC
11.
4.
12.
5.
13.
6.
14.
7.
15.
8.
16.
Percent of Dominant Species that are OBL, FACW or FAC
(excluding FAC-).
100%
Remarks: At this location the Carex had not produced fruit bodies; therefore, the specific species was not identified.
HYDROLOGY
X
Recorded Data (Describe in Remarks):
Wetland Hydrology Indicators:
Stream, Lake or Tide Gauge
Primary Indicators:
Aerial Photographs
Inundated
Other
X
Saturated In Upper 12 Inches
No Recorded Data Available
Water Marks
Drift Lines
Sediment Deposits
Field Observations:
Drainage Patterns in Wetlands
Secondary Indicators (2 or more required):
Depth of Surface Water:
0"
(In.)
Oxidized Root Channels in Upper 12 inches
Water -Stained Leaves
Depth of Free Water in Pit:
0"
(In.)
Local Soil Survey Data
FAC-Neutral Test
Depth to Saturated Soil:
>16"
(In.)
Other (Explain in Remarks)
1Zemarks: RLK Hydro installed groundwater monitoring wells on the subject property and began recording water level
elevations June 8, 2007. Results recorded from previous visits indicate the peak groundwater elevation may have occurred prior
to the well installation, because subsequent measurements indicated declining water levels. Monitoring well #2 (1,680 feet from
test pit # 10) maximum groundwater elevation was 2921.54 feet, the ground elevation at the test pit was 2922.00 feet, thus the
depth to groundwater is o 0.46 feet (5.5 inches) below ground surface.
RLK HYDRO
I N C
9M
SOILS
Map Unit Name: Swims silt loam, 0 to 3% slopes
(Series and Phase):
Swims series
Drainage Class:
Moderately well drained
Field Observations
Taxonomy (Subgroup): Medium textured alluvium
Confirm Mapped Type? X I Yes I No
Profile Description:
Depth Matrix Color
Mottle Colors Mottle Abundance/ Texture, Concretions,
(inches) Horizon (Munsell Moist)
(Munsell Moist) Size/contrast
Structure, etc.
0" — 11" O & A (5YR2.5/1)
Black
None NA
Silty loam, nonplastic,
friable
11" — 17" A (10YR3/3)
Dark brown
None NA
Silt and gravel, plastic
Hydric Soil Indicators:
Histosol
Concretions
Histic Epipedon
High Organic Content in Surface Layer in Sandy Soils
Sulfidic Odor
Organic Streaking in Sandy Soils
Aquic Moisture Regime
Listed on Local Hydric Soils List
Reducing Conditions
Listed on National Hydric Soils List
Gleyed or Low-Chroma Colors
Other (Explain in Remarks)
Remarks: The soil did contain a high organic content, but not the required 20% by weight to be classified as a highly organic soil.
WETLAND DETERMINATION
H dro h tic Vegetation Present? X
Yes
No
Wetland Hydrology Present? X
Yes
No
Hydric Soils Present?
Yes
No
X
Is this Sampling Point Within a Wetland?
Ycs
No X
Remarks: This is a part of the same historic channel as test pit #7 & #8. Soils in this area of the channel are silty loam that have been
transported here during stormwater events. The underlying gravel have the typical river rock rounded corners and is part of the evergreen
aquifer. This extremely permeable material reflects water levels in the Flathead River. Although facultative wetland vegetation can grows
the soils are not hydric. Further upstream, on the neighbors property, the old stream meander does support an obligate species. This
particular location is shaded by a tree and the subbirrigation from the shallow aquifer has most likely saturated these soils to the surface
which results in a displacement of oxygen which would support the obligate plants. All three test pits ( #7, #8, & #10) have been evaluated
on an individual basis and the wetlands in the channel are located in areas where groundwater or surface water interaction has changed the
RLK HYDRO
I N C
35
APPENDIX B
Vegetation Reference
RLK HYDRO
I N C
9m
Scientific Name
(Genus and species)
Common Name
Stratum
Indicator
Test Pit #1
75%
Phalaris arundinacea
Reed canary grass
H.U.
FACW
Prunus virginiana
Choke cherry
W.U.
FAC
Crataegus douglasii
Black hawthorn
W.U.
FAC
Dactylis glomerata
Orchard grass
H.U.
FACU
Test Pit #2
75%
Phalaris arundinacea
Reed canary grass
H.U.
FACW
Equisetum arvense
Field horsetail
H.U.
FAC
Betula occidentalis
White birch
W.U.
FACW
Dactylis glomerata
Orchard grass
H.U.
FACU
Test Pit #3
75%
Phalaris arundinacea
Reed canary grass
H.U.
FACW
Equisetum arvense
Field horsetail
H.U.
FAC
Betula papyrifera
Paper birch
W.O.
FAC
Test Pit #4
100%
Phalaris arundinancea
Reed canary grass
H.U.
FACW
Equisetum arvense
Field horsetail
H.U.
FAC
Betula papyrifera
Paper birch
W.O.
FAC
Test Pit #5
80%
Dactylis glomerata
Orchard grass
H.U.
FACU
Catabrosa aquatica
Water whorlgrass
H.U.
OBL
Carex microptera
Smallwing sedge
H.U.
FAC
Carex arcta
Northern cluster sedge
H.U.
OBL
Crataegus douglasii
Black hawthorn
W.U.
FAC
Test Pit #6
50%
Dactylis glomerate
Orchard grass
H.U.
FACU
Symphoricarpos albus
Common snowberry
W.U.
FACU
Crataegus douglasii
Black hawthorn
W.U.
FAC
Betula papyrifera
Paper birch
W.O.
FAC
Test Pit #7
66%
Phalaris arundinancea
Reed canary grass
H.U.
FACW
Festusca pratensis
Meadow fescue
H.U.
FACU+
Crataegus douglasii
Black hawthorn
W.U.
FAC
Test Pit #8
100%
Phalaris arundinacea
Reed canary grass
H.U.
FACW
Equisetum arvense
Field horsetail
W.U.
FAC
Crataegus douglasii
Black hawthorn
W.U.
FAC
Salix Spp.
Willow
W.U.
FACW
Populus balsamifera
Balsam poplar
W.O.
FAC
Betula payrifera
Paper birch
W.O.
FAC
Test Pit #9
100%
Phalaris arundinacea
Reed canary grass
H.U.
FACW
Equisetum arvense
Field horsetail
H.U.
FAC
Betula occidentalis
White birch
H.U.
FACW
Populus balsamifera
Balsam poplar
W.O.
FAC
Carex arcta
Northern cluster sedge
H.U.
OBL
Test Pit #10
100%
Phalaris arundinancea
Reed canary grass
H.U.
FACW
Carex spp.
Sedge
H.U.
FAC
Equisetum arvense
Field horsetail
H.U.
FAC
RLK
HtCO
37
APPENDIX C
Shallow Groundwater Monitoring Elevations
RLK ZHYDRO
I N C
00
01
01
01
01
01
01
•--�
01
N
N
N
N
N
N
N
01
N
�
N
�
01
01
01
01
01
01
01
01
01
N
M
N
N
N
N
N
N
N
N
N
O
�
01
01
�O
GO
01
M
O
V'�
01
�
N
N
N
N
N
N
N
N
N
--�
--�
N
N
N
N
N
N
N
N
N
N
N
l�
"O
M
•--�
�O
�
V'1
,.�
01
O
l�
,.�
l�
01
,.�
�
M
"O
"O
l�
GO
l�
•--�
�O
V'1
M
l�
--�
M
N
�O
V'1
V'1
GO
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
M
N
01
N
GO
01
V'1
GO
W)
W)
.--i
r-
L`
GO
V'1
N
GO
V'1
1p
01
O
•--�
0
GO
GO
M
V'1
M
N
T
M
N
-
01
GO
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
.Ny
01
01
01
01
01
17
17
17
17
17
17
17
17
01
01
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N--�--�
GO
V'�
N
GO
1p
�O
01
O
•--�
01
GO
l�
•--�
�O
V'�
N
N
N
N
N
N
N
N
N
N
N
N
N--�--�
F-i
y
CC
A
RLK HYDRO
I N C
gm
APPENDIX D
Map Unit Description of Soils
RLK HYDRO
I N C
,E
Map Unit Description —Upper Flathead Valley Area, Montana
Trumbull Creek Crossing, Phase II
Map Unit Description
The map units delineated on the detailed soil maps in this survey represent the soils
or miscellaneous areas in the survey area. The map unit descriptions in this section,
along with the maps, can be used to determine the suitability and potential of a unit
for specific uses. They also can be used to plan the management needed for those
uses.
A map unit delineation on a soil map represents an area dominated by one or more
major kinds of soil or miscellaneous areas. A map unit is identified and named
according to the taxonomic classification of the dominant soils. Within a taxonomic
class there are precisely defined limits for the properties of the soils. On the
landscape, however, the soils are natural phenomena, and they have the
characteristic variability of all natural phenomena. Thus, the range of some
observed properties may extend beyond the limits defined for a taxonomic class.
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is made
up of the soils or miscellaneous areas for which it is named and some minor
components that belong to taxonomic classes other than those of the major soils.
Most minor soils have properties similar to those of the dominant soil or soils in the
map unit, and thus they do not affect use and management. These are called
noncontrasting, or similar, components. They may or may not be mentioned in a
particular map unit description. Other minor components, however, have properties
and behavioral characteristics divergent enough to affect use or to require different
management. These are called contrasting, or dissimilar, components. They
generally are in small areas and could not be mapped separately because of the
scale used. Some small areas of strongly contrasting soils or miscellaneous areas
are identified by a special symbol on the maps. The contrasting components are
mentioned in the map unit descriptions. A few areas of minor components may not
have been observed, and consequently they are not mentioned in the descriptions,
especially where the pattern was so complex that it was impractical to make enough
observations to identify all the soils and miscellaneous areas on the landscape.
The presence of minor components in a map unit in no way diminishes the
usefulness or accuracy of the data. The objective of mapping is not to delineate
pure taxonomic classes but rather to separate the landscape into landforms or
landform segments that have similar use and management requirements. The
delineation of such segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, however,
onsite investigation is needed to define and locate the soils and miscellaneous
areas.
An identifying symbol precedes the map unit name in the map unit descriptions.
Each description includes general facts about the unit and gives the principal
hazards and limitations to be considered in planning for specific uses.
Soils that have profiles that are almost alike make up a soil series. Except for
differences in texture of the surface layer, all the soils of a series have major
horizons that are similar in composition, thickness, and arrangement.
USDA Natural Resources Web Soil Survey 2.0 8/28/2007
Conservation Service National Cooperative Soil Survey Page 1 of 9
Map Unit Description —Upper Flathead Valley Area, Montana
Trumbull Creek Crossing, Phase II
Soils of one series can differ in texture of the surface layer, slope, stoniness, degree
of erosion, and other characteristics that affect their use. On the basis of such
differences, a soil series is divided into soil phases. Most of the areas shown on
the detailed soil maps are phases of soil series. The name of a soil phase commonly
indicates a feature that affects use or management. For example, Lucy loamy sand,
0 to 5 percent slopes, is a phase of the Lucy series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes or undifferentiated groups.
A complex consists of two or more soils or miscellaneous areas in such an intricate
pattern or in such small areas that they cannot be shown separately on the maps.
The pattern and proportion of the soils or miscellaneous areas are somewhat similar
in all areas. Springhill -Nankin complex, 15 to 25 percent slopes, is an example.
An undifferentiated group is made up of two or more soils or miscellaneous areas
that could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and proportion
of the soils or miscellaneous areas in a mapped area are not uniform. An area can
be made up of only one of the major soils or miscellaneous areas, or it can be made
up of all of them. Mantachie, Kinston, and luka soils, 0 to 1 percent slopes,
frequently flooded, is an undifferentiated group in this survey area.
This survey includes miscellaneous areas. Such areas have little or no soil material
and support little or no vegetation. Pits is an example.
Table 2 gives the acreage and proportionate extent of each map unit. Other tables
give properties of the soils and the limitations, capabilities, and potentials for many
uses. The Glossary defines many of the terms used in describing the soils or
miscellaneous areas.
Report —Map Unit Description
Upper Flathead Valley Area, Montana
Aa—Alluvial land, poorly drained
Map Unit Setting
Elevation: 2,000 to 4,800 feet
Mean annual precipitation: 16 to 19 inches
Mean annual air temperature: 37 to 45 degrees F
Frost -free period: 90 to 120 days
Map Unit Composition
Alluvial land and similar soils: 75 percent
Minor components: 25 percent
Description of Alluvial Land
Properties and qualities
Slope: 0 to 4 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Poorly drained
Capacity of the most limiting layer to transmit water
(Ksat): Moderately high to high (0.57 to 1.98 inlhr)
uSDA Natural Resources Web Soil Survey 2.0 8/28/2007
Conservation Service National Cooperative Soil Survey Page 2 of 9
Map Unit Description —Upper Flathead Valley Area, Montana
Trumbull Creek Crossing, Phase II
Depth to water table: About 18 to 36 inches
Frequency of flooding: Frequent
Frequency of ponding: None
Maximum salinity: Nonsaline (0.0 to 2.0 mmhoslcm)
Available water capacity: Low (about 4.8 inches)
Interpretive groups
Land capability classification (irrigated): 5w
Land capability (nonirrigated): 5w
Ecological site: Overflow (Ov) 15-19" p.z. (R044XW182MT)
Typical profile
20 to 50 inches: Stratified gravelly sandy loam to silty clay loam
50 to 60 inches: Stratified gravelly loamy sand to coarse sandy loam
Minor Components
Poorly drained soils
Percent of map unit: 25 percent
Landform: Flood plains
Down -slope shape: Linear
Across -slope shape: Linear
Bc—Birch fine sandy loam, 0 to 5 percent slopes
Map Unit Setting
Elevation: 2,400 to 4,000 feet
Mean annual precipitation: 19 to 25 inches
Mean annual air temperature: 39 to 45 degrees F
Frost -free period: 90 to 110 days
Map Unit Composition
Birch and similar soils: 80 percent
Minor components: 20 percent
Description of Birch
Setting
Landform: Terraces
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Alluvium
Properties and qualities
Slope: 0 to 5 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Excessively drained
Capacity of the most limiting layer to transmit water (Ksat): High (1.98
to 5.95 inlhr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water capacity: Low (about 3.6 inches)
Interpretive groups
Land capability classification (irrigated): 4s
USDA Natural Resources Web Soil Survey 2.0 8/28/2007
Conservation Service National Cooperative Soil Survey Page 3 of 9
Map Unit Description —Upper Flathead Valley Area, Montana
Trumbull Creek Crossing, Phase II
Land capability (nonirrigated): 6s
Typical profile
0 to 2 inches: Slightly decomposed plant material
2 to 8 inches: Fine sandy loam
8 to 16 inches: Fine sandy loam
16 to 24 inches: Very gravelly loamy sand
24 to 60 inches: Extremely gravelly loamy sand
Minor Components
Nonhydric
Percent of map unit: 20 percent
Kzd—Kiwanis fine sandy loam, 0 to 4 percent slopes
Map Unit Setting
Elevation: 3,000 to 5,000 feet
Mean annual precipitation: 12 to 17 inches
Mean annual air temperature: 39 to 45 degrees F
Frost -free period: 90 to 130 days
Map Unit Composition
Kiwanis and similar soils: 90 percent
Minor components: 10 percent
Description of Kiwanis
Setting
Landform: Stream terraces
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Alluvium
Properties and qualities
Slope: 0 to 4 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Capacity of the most limiting layer to transmit water (Ksat): High (1.98
to 5.95 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: Rare
Frequency of ponding: None
Calcium carbonate, maximum content: 10 percent
Maximum salinity: Nonsaline (0.0 to 2.0 mmhos/cm)
Available water capacity: Moderate (about 6.5 inches)
Interpretive groups
Land capability classification (irrigated): 4e
Land capability (nonirrigated): 4e
Ecological site: Sandy (Sy) 15-19" p.z. (R044XW183MT)
Typical profile
0 to 9 inches: Fine sandy loam
9 to 39 inches: Fine sandy loam
39 to 70 inches: Very gravelly sand
USDA Natural Resources Web Soil Survey 2.0 8/28/2007
Conservation Service National Cooperative Soil Survey Page 4 of 9
Map Unit Description —Upper Flathead Valley Area, Montana
Trumbull Creek Crossing, Phase II
Minor Components
Nonhydric
Percent of map unit: 10 percent
Kze—Kiwanis loam, 0 to 3 percent slopes
Map Unit Setting
Elevation: 3,000 to 5,000 feet
Mean annual precipitation: 12 to 17 inches
Mean annual air temperature: 39 to 45 degrees F
Frost -free period: 90 to 130 days
Map Unit Composition
Kiwanis and similar soils: 90 percent
Minor components: 10 percent
Description of Kiwanis
Setting
Landform: Stream terraces
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Alluvium
Properties and qualities
Slope: 0 to 3 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Capacity of the most limiting layer to transmit water
(Ksat): Moderately high to high (0.57 to 1.98 inlhr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum content: 10 percent
Maximum salinity: Nonsaline (0.0 to 2.0 mmhoslcm)
Available water capacity: Moderate (about 6.7 inches)
Interpretive groups
Land capability classification (irrigated): 3e
Land capability (nonirrigated): 3e
Ecological site: Silty (Si) 15-19" p.z. (R044XW184MT)
Typical profile
0 to 9 inches: Loam
9 to 39 inches: Fine sandy loam
39 to 70 inches: Very gravelly sand
Minor Components
Nonhydric
Percent of map unit: 10 percent
USDA Natural Resources Web Soil Survey 2.0 8/28/2007
Conservation Service National Cooperative Soil Survey Page 5 of 9
Map Unit Description —Upper Flathead Valley Area, Montana
Trumbull Creek Crossing, Phase II
Kzg—Kiwanis-Birch fine sandy loams, 0 to 5 percent slopes
Map Unit Setting
Elevation: 2,400 to 5,000 feet
Mean annual precipitation: 12 to 25 inches
Mean annual air temperature: 39 to 45 degrees F
Frost -free period: 90 to 130 days
Map Unit Composition
Kiwanis and similar soils: 45 percent
Birch and similar soils: 40 percent
Minor components: 15 percent
Description of Kiwanis
Setting
Landform: Stream terraces
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Alluvium
Properties and qualities
Slope: 0 to 5 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Capacity of the most limiting layer to transmit water (Ksat): High (1.98
to 5.95 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum content: 10 percent
Maximum salinity: Nonsaline (0.0 to 2.0 mmhos/cm)
Available water capacity: Moderate (about 6.5 inches)
Interpretive groups
Land capability classification (irrigated): 4e
Land capability (nonirrigated): 4e
Ecological site: Silty (Si) 15-19" p.z. (R044XW184MT)
Typical profile
0 to 9 inches: Fine sandy loam
9 to 39 inches: Fine sandy loam
39 to 70 inches: Very gravelly sand
Description of Birch
Setting
Landform: Terraces
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Sandy and gravelly alluvium
Properties and qualities
Slope: 0 to 5 percent
Depth to restrictive feature: More than 80 inches
USDA Natural Resources Web Soil Survey 2.0 8/28/2007
Conservation Service National Cooperative Soil Survey Page 6 of 9
Map Unit Description —Upper Flathead Valley Area, Montana
Trumbull Creek Crossing, Phase II
Drainage class: Excessively drained
Capacity of the most limiting layer to transmit water (Ksat): High (1.98
to 5.95 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water capacity: Low (about 3.6 inches)
Interpretive groups
Land capability classification (irrigated): 4s
Land capability (nonirrigated): 6s
Typical profile
0 to 2 inches: Slightly decomposed plant material
2 to 8 inches: Fine sandy loam
8 to 16 inches: Fine sandy loam
16 to 24 inches: Very gravelly loamy sand
24 to 60 inches: Extremely gravelly loamy sand
Minor Components
Nonhydric
Percent of map unit: 15 percent
Kzh—Kiwanis-Birch loams, 0 to 4 percent slopes
Map Unit Setting
Elevation: 2,400 to 5,000 feet
Mean annual precipitation: 12 to 25 inches
Mean annual air temperature: 39 to 45 degrees F
Frost -free period: 90 to 130 days
Map Unit Composition
Kiwanis and similar soils: 45 percent
Birch and similar soils: 40 percent
Minor components: 15 percent
Description of Kiwanis
Setting
Landform: Stream terraces
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Alluvium
Properties and qualities
Slope: 0 to 4 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Capacity of the most limiting layer to transmit water
(Ksat): Moderately high to high (0.57 to 1.98 inlhr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum content: 10 percent
Maximum salinity: Nonsaline (0.0 to 2.0 mmhoslcm)
USDA Natural Resources Web Soil Survey 2.0 8/28/2007
Conservation Service National Cooperative Soil Survey Page 7 of 9
Map Unit Description —Upper Flathead Valley Area, Montana
Trumbull Creek Crossing, Phase II
Available water capacity: Moderate (about 6.7 inches)
Interpretive groups
Land capability classification (irrigated): 3e
Land capability (nonirrigated): 3e
Ecological site: Silty (Si) 15-19" p.z. (R044XW184MT)
Typical profile
0 to 9 inches: Loam
9 to 39 inches: Fine sandy loam
39 to 70 inches: Very gravelly sand
Description of Birch
Setting
Landform: Terraces
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Sandy and gravelly alluvium
Properties and qualities
Slope: 0 to 4 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Excessively drained
Capacity of the most limiting layer to transmit water (Ksat): High (1.98
to 5.95 inlhr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water capacity: Low (about 3.6 inches)
Interpretive groups
Land capability classification (irrigated): 4s
Land capability (nonirrigated): 6s
Typical profile
0 to 2 inches: Slightly decomposed plant material
2 to 8 inches: Fine sandy loam
8 to 16 inches: Fine sandy loam
16 to 24 inches: Very gravelly loamy sand
24 to 60 inches: Extremely gravelly loamy sand
Minor Components
Nonhydric
Percent of map unit: 15 percent
So —Swims silt loam, 0 to 3 percent slopes
Map Unit Setting
Elevation: 2,600 to 3,400 feet
Mean annual precipitation: 15 to 18 inches
Mean annual air temperature: 39 to 45 degrees F
Frost -free period: 100 to 120 days
Map Unit Composition
Swims and similar soils: 90 percent
USDA Natural Resources Web Soil Survey 2.0 8/28/2007
Conservation Service National Cooperative Soil Survey Page 8 of 9
Map Unit Description —Upper Flathead Valley Area, Montana
Trumbull Creek Crossing, Phase II
Minor components: 10 percent
Description of Swims
Setting
Landform: Terraces
Down -slope shape: Linear
Across -slope shape: Linear
Parent material: Alluvium
Properties and qualities
Slope: 0 to 3 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Moderately well drained
Capacity of the most limiting layer to transmit water
(Ksat): Moderately high to high (0.20 to 1.98 in/hr)
Depth to water table: About 48 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum content: 15 percent
Maximum salinity: Nonsaline to very slightly saline (0.0 to 3.0 mmhos/
cm)
Available water capacity: High (about 10.2 inches)
Interpretive groups
Land capability classification (irrigated): 3e
Land capability (nonirrigated): 3e
Typical profile
0 to 1 inches: Slightly decomposed plant material
1 to 5 inches: Silt loam
5 to 12 inches: Silty clay loam
12 to 26 inches: Silt loam
26 to 55 inches: Stratified very fine sandy loam to silty clay loam
55 to 60 inches: Loamy fine sand
Minor Components
Nonhydric
Percent of map unit: 8 percent
Poorly drained soils
Percent of map unit: 2 percent
Landform: Channels
Down -slope shape: Linear
Across -slope shape: Linear
Data Source Information
Soil Survey Area: Upper Flathead Valley Area, Montana
Survey Area Data: Version 7, Apr 19, 2007
USDA Natural Resources Web Soil Survey 2.0 8/28/2007
Conservation Service National Cooperative Soil Survey Page 9 of 9
APPENDIX E
Non -Jurisdictional Wetlands
RLK HYDRO
I N C
� .
50
g
ON,
a r . 1l Ira t ,
t
`• fax`
• ' c 11 c,,\, v
Trumbull CrL — .. ON- � �" `.' ��, +`•
Crossing, Phase II '' Ki`� t
Exist n9 Bridge' � ry►T• ,��. Nf• y� tC ;A t • r �'
r r.' Trumbull Crwk ••Tr,
rea = 0.07 ac
rea = 0.46 ac
i
it
Spring Creek
Legend:
NonJudsdictional Wetlands
rr/ IN
TITLE: NonJurisdictional Wetlands SCALE: Graphic
RLK HYDRO
PROJECT: Trumbull Creek Crossin ,Phase II APPROVED BY:
DESIGN BY: MAS REVISION: Plate #4494NMan S[., P.O�Box 1579
DRAWN BY: LB REVISION: Kalispell, Maas na 59903
REVIEWED BY: REVISION: (aoe) 7s2-2025 FAX (4oe)257-4125
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RLK zHYDRO
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52