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March 26, 2015
WESTLAKE VILLAGE SUBDIVISION
WETLAND AND WATERWAY DELINEATION REPORT
PROJECT NUMBER:
137861 PROJECT CONTACT: Erik Nyquist, PWS
EMAIL: erik.nyquist@powereng.com
PHONE:
(208)-659-8403
POWER ENGINEERS, INC. Wetland and Waterway Delineation Report
WETLAND AND WATERWAY DELINEATION REPORT
PREPARED FOR: HAYSTACK DEVELOPMENT
PREPARED BY: ERIK NYQUIST, PWS
(208) 659-8403 ERIK.NYQUIST@POWERENG.COM
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TABLE OF CONTENTS
1.0 INTRODUCTION .................................................................................................................... 1
1.1 SITE DESCRIPTION .................................................................................................................. 1 1.2 JURISDICTIONAL AUTHORITY ................................................................................................. 1
2.0 METHODS ................................................................................................................................ 3
2.1 ANALYSIS OF EXISTING DATA ................................................................................................ 3
2.2 FIELD INVESTIGATIONS .......................................................................................................... 3
2.2.1 Soils ................................................................................................................................ 4 2.2.2 Vegetation....................................................................................................................... 4
2.2.2 Hydrology ....................................................................................................................... 4
3.0 RESULTS .................................................................................................................................. 6
3.1 DESKTOP ANALYSIS ............................................................................................................... 6
3.1.1 Topographic Map ........................................................................................................... 6
3.1.2 Aerial Map ...................................................................................................................... 6 3.1.3 Soils ................................................................................................................................ 6
3.1.4 Wetlands ......................................................................................................................... 6
3.1.5 Waterways ...................................................................................................................... 7 3.1.6 Floodplains ..................................................................................................................... 7
3.2 FIELD INVESTIGATIONS .......................................................................................................... 7
3.2.2 Results ............................................................................................................................ 7
4.0 SUMMARY ............................................................................................................................. 10
5.0 LITERATURE CITED .......................................................................................................... 11
APPENDICES:
APPENDIX A WETLAND/WATERWAY PHOTOGRAPHS ................................................................. A-1 APPENDIX B USACE WETLAND DETERMINATION DATASHEETS ............................................... B-1
TABLES:
TABLE 1 MAPPED SOIL UNITS ........................................................................................................... 6
TABLE 2 SUMMARY DATA FOR WETLANDS/WATERWAYS ............................................................... 8 TABLE 3 SUMMARY OF OBSERVED WETLAND CRITERIA ................................................................. 9
FIGURES:
FIGURE 1 TOPOGRAPHIC/VICINITY MAP .......................................................................................... 15
FIGURE 2 AERIAL MAP ..................................................................................................................... 16 FIGURE 3 SOILS MAP ........................................................................................................................ 17
FIGURE 4 NWI/NHD MAP ................................................................................................................ 18
FIGURE 5 WETLAND/WATERWAY DELINEATION MAP .................................................................... 19
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ACRONYMS AND ABBREVIATIONS
CFR Code of Federal Regulations CWA Clean Water Act EPA Environmental Protection Agency
FAC Facultative FACW Facultative Wetland
FEMA Federal Emergency Management Act
FR Federal Register NAIP National Agriculture Imagery Program
NHD National Hydrography Dataset
NRCS Natural Resource Conservation Service NWI National Wetland Inventory
OBL Obligate Wetland
OHWM Ordinary High Water Mark PEM Palustrine Emergent
POWER POWER Engineers, Inc.
Project Westlake Village Subdivision Project RHA River and Harbors Act
U.S.C. United States Code U.S. United States USACE United States Army Corps of Engineers
USDA United States Department of Agriculture USFWS United States Fish and Wildlife Service
USGS United States Geological Survey
WQC Water Quality Certification
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1.0 INTRODUCTION
POWER Engineers, Inc. (POWER) was retained by Haystack Development to complete a delineation of potentially regulated wetlands and waterways (i.e., identifying boundaries of wetlands and
waterways potentially regulated by the federal government [waters of the United States (U.S.)] within an approximately 53.8-acre site identified as the proposed Westlake Village Subdivision (Project).
The proposed Project includes a residential and commercial development located in Bozeman,
Montana. The legal description of the Project area is the southwest quarter of Section 26, Township 1 South, Range 5 East, Bozeman, Gallatin County, Montana.
This report presents the professional opinion of POWER regarding the presence/absence of potentially regulated wetlands and waterways. The final determination of the limits and jurisdictional
status of on-site wetlands and waterways is under the purview of the U.S. Army Corps of Engineers
(USACE) and may require an on-site inspection with the USACE.
1.1 Site Description
The majority of the Project area consists of flat agricultural land currently in wheat production. A large barn is located in the northern portion of the Project area and a gravel access road bisects the western portion of the Project area. The southwestern boundary of the Project area extends along a
riparian corridor associated with an unnamed perennial drainage and is located adjacent to a man-made pond. The Project area is bound by East Valley Center Road and Westlake Road to the north; North 27th Avenue to the east; undeveloped land and a school bus facility to the south; a riparian
area/pond to the southwest; and a residence, riparian area/stream, and a pond to the west. A total of approximately 53.8 acres were investigated for the presence of wetlands and waterways associated
with the Project area. A topographic map of the Project area is provided as Figure 1 and an aerial map
as Figure 2. 1.2 Jurisdictional Authority
The USACE has primacy over the regulation of navigable waters of the U.S. under Sections 9 and 10 of the Rivers and Harbors Act of 1899 (RHA) and federal jurisdictional waters under Section 404 of the Clean Water Act (CWA). Navigable waters are defined as waters that are subject to the ebb and
flow of the tide and/or are presently used, have been used in the past, or may be susceptible for use to
transport interstate or foreign commerce. Federal jurisdictional waters include navigable waters and all other waters that are regulated by the USACE, which together are referred to as “waters of the
U.S.” Impacts to waters of the U.S. are regulated by the USACE through Section 404 of the CWA (33 United States Code [U.S.C.] § 1344) and Section 10 of the RHA (33 U.S.C. § 403). In addition, prior to federal authorization for impacts to waters or wetlands, a water quality certification (WQC) must
first be obtained from the applicable state as defined in Section 401 of the CWA (33 U.S.C. § 1341).
Waters of the U.S. currently include traditional navigable waters and their adjacent wetlands; non-
navigable tributaries of traditional navigable waters that are relatively permanent (tributaries that flow year round or have continuous flow at least seasonally [three months]); and wetlands that directly
abut such tributaries (40 Code of Federal Regulations [CFR] 230.3(s)). The CWA jurisdiction also
covers non-navigable tributaries and their adjacent wetlands that are not relatively permanent and wetlands adjacent to but not directly abutting a relatively permanent non-navigable tributary when a
fact-specific analysis determines that those waters have a significant nexus with traditional navigable waters. A significant nexus determination must be completed in order to prove whether or not a water feature in question has more than an insubstantial or speculative hydrological or ecological effect on
the chemical, physical, and/or biological integrity of a downstream traditional navigable water (EPA
2008; USACE and EPA 2014).
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On April 21, 2014, the Environmental Protection Agency (EPA) and the USACE published for public
comment in the Federal Register (FR; 79 FR 22188) a proposal to enhance protection for the nation’s
public health and aquatic resources, and increase CWA program predictability and consistency by increasing clarity as to the scope of “waters of the U.S.” protected under the CWA. The extended
comment period was closed on November 14, 2014, and the final rule is expected to be published in
April 2015 (Federal Register 2015). The objective of the proposed guidance is to reduce uncertainty, litigation risk, inconsistent application of the CWA, and to reduce the amount of waters in a
jurisdictional gray area which require case-specific determinations. Under the proposed guidance, the EPA and USACE intend to define “waters of the U.S.” for all
sections of the CWA to mean: traditional navigable waters; interstate waters, including interstate wetlands (e.g., waters or wetlands physically located on the border between two states or countries); the territorial seas; and impoundments, tributaries, adjacent waters, or adjacent wetlands of these
features. Pending the final ruling, waters in these categories would be jurisdictional “waters of the U.S.” by rule and no additional analysis would be required. In addition, on a case-specific basis, upstream headwaters, wetlands, lakes, man-made channels with perennial flow, or other waters or
wetlands may be considered waters of the U.S. where science supports an important and identifiable chemical, physical, or biological effect on downstream navigable waters. Prairie potholes, vernal
pools, and playa lakes may act as a collective group of similar waters meeting the significant nexus
test, and thus may also warrant protection (USACE and EPA 2014).
Under current guidance, the USACE generally will not assert jurisdiction over swales or erosional
features (e.g., gullies, small washes characterized by low volume, infrequent, or short duration flow), and ditches (including roadside ditches) excavated wholly in and draining only uplands that do not
carry a relatively permanent flow of water (EPA 2008). The proposed guidance expands that ditches that are dug wholly in uplands must flow 365 days a year into a jurisdictional water to be considered a waters of the U.S. Other features excluded as waters of the U.S. under the proposed guidance include
waste treatment systems; prior converted cropland; artificially irrigated areas; artificial lakes, ponds, reflecting pools, swimming pools, or small ornamental waters constructed on dry lands; water-filled depressions created incidental to construction activity; groundwater, including groundwater drained
through subsurface drainage systems; and gullies, rills and non-wetland swales (USACE and EPA 2014).
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2.0 METHODS
2.1 Analysis of Existing Data
Prior to the commencement of the on-site field investigation, POWER reviewed available technical documents, databases, and maps to determine the potential extent of wetlands and waterways within
the Project area. These data included:
• United States Geological Survey (USGS) 7.5-minute Topographic Quadrangle Map: Bozeman, Montana (USGS 1998).
• National Agriculture Imagery Program (NAIP) Aerial Photography (NAIP 2013).
• United States Department of Agriculture (USDA) Natural Resource Conservation Service
(NRCS) Digital General Soil Map of the U.S. (NRCS 2006) and the NRCS Web Soil Survey
(NRCS 2015).
• U.S. Fish and Wildlife Service (USFWS) National Wetland Inventory (NWI) Wetlands
Mapper (USFWS 2015).
• U.S. Geological Survey (USGS) National Hydrography Dataset (NHD) mapper (USGS
2015).
• Federal Emergency Management Agency (FEMA) 100-year Floodplain maps (FEMA 2015).
2.2 Field Investigations
This review focused on determining the presence of potentially jurisdictional wetlands or waterways within the Project area. Field surveys were conducted in accordance with the “Routine Onsite
Determination Method” described in the USACE Wetlands Delineation Manual (Environmental Laboratory 1987) and the Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region (Version 2.0) (USACE 2010).
Wetlands are defined as those areas that are inundated or saturated by surface or groundwater at a
frequency and duration sufficient to support, and under normal circumstances do support, a
prevalence of vegetation typically adapted for life in saturated conditions. Under normal circumstances, three parameters must be present for an area to be considered a wetland; hydrophytic
vegetation, wetland hydrology, and hydric soils.
The Project area was traversed evaluating vegetation, soils, and hydrology at sampling plots to
determine the presence of wetland indicators for each parameter (hydric soils, hydrophytic vegetation,
and hydrology) according to methodologies outlined in the Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region (Version
2.0) (USACE 2010). The boundaries of those areas determined to meet the three criteria were demarcated with pin flags by POWER and surveyed by Morrison-Maierle, Inc. land surveyors.
Waterways within the survey area were examined for the presence/absence of an ordinary high water mark (OHWM) as defined in 33 CFR 328.3(e) and a defined bed and bank. Generally, if these
characteristics were observed in a water body and a significant nexus was observed, it was
determined to be a regulated waterway (i.e. water of the U.S.). If these characteristics were absent, a significant nexus to a water of the U.S. was not identified, or atypical circumstances existed, these
areas were determined to be a swale, ditch, or other erosional feature, and likely not a CWA-regulated
feature (i.e., not a water of the U.S.). Swales or erosional features (e.g., gullies, small washes characterized by low volume, infrequent, or short duration flow) and ditches excavated wholly in and
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draining only uplands that do not carry a relatively permanent flow of water are generally non-
jurisdictional features and not considered waters of the U.S. (EPA 2008). The field survey included
the delineation of features considered to have, in POWER’s professional opinion, a significant nexus.
Any waterways (OHWM and/or defined bed and bank) observed within the survey areas were
classified based on the observed flow and channel characteristics at the time of field review. These features were also surveyed by Morrison-Maierle, Inc. land surveyors.
The specific methods for characterizing and evaluating vegetation, hydrology, and soils for determining the presence of jurisdictional areas are identified below.
2.2.1 Soils
At the center of each data plot, the wetland scientist completed borings with a hand-held auger to
depths necessary to accurately determine a soil’s hydric status (typically 18 to 24 inches below
ground surface). The information collected for each soil profile included soil horizons, depth, texture, color, and hydric soil characteristics including organic content, accumulation of sulfides, gley
formation, redoximorphic concentrations and depletions, and the visually-detectable depletion of
minerals such as iron and manganese. Colors of the soil matrix and concentrations/depletions were identified using Munsell Soil Color Charts (Munsell 2000). Hydric soil determinations were based on
criteria established in the 1987 USACE Manual (Environmental Laboratory 1987), along with Field Indicators of Hydric Soils in the United States (NRCS 2010), and the Western Mountains, Valleys, and Coast regional supplement.
2.2.2 Vegetation
Species abundance in both upland and wetland communities were visually estimated. Dominant trees
and shrubs/saplings were recorded within a 30-foot and 15-foot radius, respectively, from the center
of each documentation plot. Woody vines were recorded within a 30-foot radius of the plot. Dominant herbaceous vegetation was recorded within a 5-foot radius of the plot. The indicator status of each
species was identified using the National Wetland Plant List for the Western Mountains, Valleys, and Coast Region (Lichvar et al. 2014). The presence of hydrophytic vegetation within a representative plant community was positively identified if more than 50 percent of the dominant species within the
community had an indicator status of Obligate Wetland (OBL), Facultative Wetland (FACW), or Facultative (FAC). This determination method is referred to as the dominance test. Dominant plant
species are determined using the “50/20 rule” defined in the 1987 Wetlands Delineation Manual
(Environmental Laboratory 1987). If the plant community failed the dominance test, but indicators for hydric soils or wetland hydrology were present, the plant community was examined for additional
hydrophytic vegetation indicators. These hydrophytic vegetation indicators are identified in the
Regional Supplement and include the prevalence index, evidence of morphological adaptations for growth in a wetland, and problematic hydrophytic vegetation (USACE 2010).
2.2.2 Hydrology
Site hydrology was evaluated during field surveys by initially observing whether the soil at the
surface was inundated or saturated. If the ground surface was dry, the depth to freestanding
groundwater or saturated soil was measured, and the presence or absence of other indicators of wetland hydrology (e.g., drift lines, water stained leaves) was noted. The wetland hydrology criterion
was met if one or more primary or two or more secondary field indicators were present
(Environmental Laboratory 1987). However, during the survey, those wetlands which lacked any hydrology indicators due to temporarily dry conditions, disturbance, or other factors and did not meet
the 1987 USACE Manual criteria were evaluated using criteria from the Regional Supplement.
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In the field, wetlands and waterways were classified according to the Classification of Wetlands and
Deepwater Habitats of the United States (Cowardin et al. 1979). The Cowardin classification is a
taxonomic system that divides wetlands and deepwater habitats into five systems based on hydrologic factors (Marine, Estuarine, Riverine, Lacustrine, and Palustrine).
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3.0 RESULTS
3.1 Desktop Analysis
The desktop analysis completed by POWER included soils, waterways, topographic, wetlands, and floodplain data to determine the potential presence of wetland/waterway features. The results of the
desktop analysis are provided in the following sections. A topographic map (Figure 1), aerial map (Figure 2), soils map (Figures 3), and NWI/NHD map (Figure 4) were all reviewed as part of the
desktop analysis. Additionally, FEMA data were evaluated to identify potential wetlands and
waterways due to the presence of mapped 100-year floodplains.
3.1.1 Topographic Map
According to the USGS topographic map (Figure 1), the project area is a relatively flat, undeveloped area located south of an interstate and railroad corridor. The USGS map identifies an unnamed
perennial stream as extending along the southwestern boundary of the Project area flowing north and
ultimately terminating into the East Gallatin River northwest of the Project area.
3.1.2 Aerial Map
The aerial map (Figure 2) depicts the majority of the Project area as agricultural currently being utilized for crop production. A transportation corridor is located to the north (Westlake Road, East Valley Center Road, Interstate 90, and Frontage Road); North 27th Avenue is located to the east; an
undeveloped area, school bus facility, and pond/riparian area are located to the south; and Davis Lane, a riparian area, stream, pond, and residence are located to the west.
3.1.3 Soils
Soil map units and their associated hydric rating are identified for the Project area in Table 1 (Figure 3). Neither of the soil map units that correspond to the Project area (50B and 748A) are identified by
NRCS as hydric or containing hydric soil components. Both of the on-site soil map units are classified as well drained soils.
TABLE 1 MAPPED SOIL UNITS
SOIL MAP UNIT NAME SOIL MAP UNIT CODE DRAINAGE CLASS HYDRIC RATING
ACREAGE IN SURVEY AREA Blackdog silt loam, 0 to 4 percent slopes 50B Well drained Non-hydric 48.6 Hyalite-Beaverton complex 0 to 4 percent slopes 748A Well drained Non-hydric 5.2
3.1.4 Wetlands
According to the NWI data, one palustrine emergent (PEM) wetland was identified within the Project
area (Figure 4). This wetland area is located along the southwestern boundary of the Project area and corresponds to an unnamed perennial stream that extends along that area. Additionally, one palustrine, aquatic bed, intermittently exposed, excavated (PABGx) wetland (freshwater pond) is
located immediately adjacent to and south of the southwestern boundary of the Project area.
Palustrine wetlands are identified as all non-tidal wetlands dominated by trees, shrubs, persistent
emergents, emergent mosses, or lichens, and all such tidal wetlands where ocean-derived salinities are below 0.5 percent. This category also includes wetlands lacking such vegetation but with all of the
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following characteristics: (1) area less than 20 acres (8.0 hectares); (2) lacking an active wave-formed
or bedrock boundary; (3) water depth in the deepest part of the basin less than 6.6 feet (2.0 meters) at
low water; and (4) ocean-derived salinities less than 0.5 percent (Cowardin et al. 1979).
PEM includes palustrine wetlands with a dominance of erect rooted herbaceous (not woody) wetland
plants. PABGx includes excavated man-made ponds with plants that grow on or below the surface of the water in non-tidal areas.
3.1.5 Waterways
USGS topographical mapping and NHD data were evaluated to identify potential waterway features
within the Project area (Figure 1 and Figure 4, respectively). According to the USGS and NHD data,
an unnamed perennial stream extends along the southwestern portion of the Project area and then to the north/northwest along (and east of) Davis Lane towards the Interstate 90 corridor.
3.1.6 Floodplains
FEMA data were evaluated to identify potential wetlands and waterways due to the presence of
mapped 100-year floodplains. No FEMA-designated floodplain areas were identified within or
immediately adjacent to the Project area.
3.2 Field Investigations
POWER completed an on-site field investigation on March 18, 2015 to identify wetlands/waterways
associated with the proposed residential/commercial development. The results of the investigation are discussed below.
Photographs and associated field observations of the vegetation, hydrology, and soils of the delineated wetland/waterway features identified within the Project area are included as Appendix A.
The extent of the wetland/waterway boundaries that were identified in the field are depicted on Figure 5. Completed USACE wetland determination data forms, for both upland and wetland areas, are provided in Appendix B.
3.2.2 Results
Table 2 provides a summary of the wetland/waterway characteristics for the features that were
delineated within the Project area. Figure 5 depicts the location of the delineated features within the Project area and location of associated sample points utilized to make the wetland/upland boundary determination. Appendix A contains representative photographs. Details regarding observed wetland
criteria are provided on USACE wetland determination forms in Appendix B. Additionally, Table 3 provides a summary of the dominant vegetative species, hydric soil indicators, and hydrology indicators observed. One PEM wetland (W-1) and the OHWM of an unnamed perennial waterway
(WW-1) were delineated within the Project area. Wetland W-1 was delineated as the wetland fringe of an unnamed perennial waterway (WW-1), and
totaled 0.13 acre within the Project Area. Wetland W-1 extends to the south/upstream of the Project area and to the west then north/downstream from the Project area (Figure 5). The wetland hydrology
indicators for W-1 included a high water table (8 inches), saturation in the upper 12 inches of the soil
profile (6 inches), the presence of reduced iron, drainage patterns, saturation visible on aerial imagery, and a positive FAC-neutral test. In addition to the perennial waterway providing hydrology
to W-1, a constructed drainage channel extending from the man-made pond located immediately
south of the wetland/stream is providing supplemental hydrology to the western-most portion of these
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features within the Project area. The dominant vegetation observed within the wetland included reed
canarygrass (Phalaris arundinacea, FACW) with other vegetation observed including Canada thistle
(Cirsium arvense, FACU), curly dock (Rumex crispus, FAC), and field sowthistle (Sonchus arvensis, FACU). The hydrophytic vegetation indicators included a positive dominance test and prevalence
index within the range indicating the presence of hydrophytic vegetation. The hydric soil indicator is
depleted below dark surface based on observations of a low chroma soil layer (10YR 2/1, 0 to 4 inches) underlain by a depleted soil layer (10YR 4/1, 4 to 24 inches) with 10 percent distinct
redoximorphic concentrations (10YR 5/6). The wetland/upland boundary primarily follows a change in topography and vegetation from wetland- to upland-dominated species. The observed upland vegetation was dominated by smooth brome (Bromus inermis, FACU) with other upland vegetation
including Canada thistle, slender wheatgrass (Elymus trachycaulus, FACU), tall tumble mustard (Sisymbrium altissimum, FACU), prickly lettuce (Lactuca serriola, FACU), and cheatgrass (Bromus tectorum, NS/UPL). W-1 was preliminarily determined to be jurisdictional based on an observed
hydrologic connection to a waters of the U.S. (East Gallatin River). Waterway WW-1 is an unnamed perennial stream that totaled 451 linear feet and 0.02 acre within the
Project area. The average OHWM width of WW-1 was determined to be 2.0 feet with stable/vegetated stream banks and predominantly silt substrate with some gravel/cobble. WW-1 also
extends to the south/upstream of the Project area and to the west then north/downstream from the
Project area (Figure 5). WW-1 was determined to be a riverine, lower perennial, unconsolidated bottom (R2UB) water according to the Cowardin system (Cowardin et al. 1979) through the on-site
evaluation.
Riverine systems include all wetlands and deepwater habitats contained within a channel except those
wetlands: (1) dominated by trees, shrubs, persistent emergents, emergent mosses, or lichens; and (2) which have habitats with ocean-derived salinities of 0.5 percent (Cowardin et al. 1979). R2UB includes wetlands/waters with perennial hydrology and at least 25 percent cover of the channel
substrate particles smaller than stones, and a vegetative cover less than 30 percent (Cowardin et al. 1979).
After reviewing aerial photographs and topographic maps, it was determined that WW-1 eventually terminates into the East Gallatin River to the north of the Project area and therefore, was preliminarily determined to be jurisdictional.
TABLE 2 SUMMARY DATA FOR WETLANDS/WATERWAYS
WETLAND/ WATERWAY ID WETLAND OR WATERWAY TYPE1 WETLAND TYPE (HGM)2 JURISDICTIONAL STATUS3 SIZE (ACRES) LENGTH (FEET) LOCATION (LAT/LONG) Wetland 1 (W-1) PEM Riverine Jurisdictional 0.13 NA 45043’7.43”, 1110.4’47.52”
Waterway 1 (WW-1) R2UB NA Jurisdictional 0.02 451 45043’7.47”, 1110.4’47.90” TOTAL 0.15 451 Note: PEM = Palustrine, Emergent; R2UB = Riverine, Lower Perennial, Unconsolidated Bottom 1 Cowardin et al. 1979
2 Brinson 1993 3 The determination of each wetland’s jurisdictional or connected status represents POWER’s professional opinion; the final determination of jurisdictional status is under the purview of the USACE.
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TABLE 3 SUMMARY OF OBSERVED WETLAND CRITERIA
DOMINANT VEGETATION HYDROLOGY INDICATORS HYDRIC SOIL INDICATORS Phalaris arundinacea Drainage patterns Depleted below dark surface FAC-Neutral test Geomorphic position
High water table
Presence of reduced Iron
Saturation
Saturation visible on aerial imagery
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4.0 SUMMARY
Routine wetland and stream surveys were completed on the approximately 53.8-acre Project area located in Bozeman, Gallatin County, Montana. A total of one wetland (0.13 acre) and one waterway
(unnamed perennial stream; 451 linear feet, 0.02 acre) were identified and delineated within the Project survey area. A preliminary determination that the delineated features contained in this report
are jurisdictional is based on an observed connection to a waters of the U.S.
The preliminary wetland/waterway boundaries identified within the Project survey area, and their
assessments, are based on POWER’s professional opinion. Any impacts to jurisdictional waters
within the survey area may require authorization under Sections 404 and 401 of the CWA. Current regulations require authorization of any impacts to these features from the USACE; Gallatin
Conservation District, and the Montana Department of Environmental Quality.
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5.0 LITERATURE CITED
Brinson, M.M. 1993. A Hydrogeomorphic Classification for Wetlands. U.S. Army Corps of
Engineers, Waterways Experiment Station, Vicksburg, MS, USA. Technical Report WRP-DE-4, U.S. Army Engineer Waterways Experiment Station, Vicksburg, MS.
Cowardin, L.M., F.C. Golet, and E.T. LaRoe. 1979. Classification of Wetlands and Deepwater Habitats of the United States. Office of Biological Services, US Fish and Wildlife Service,
US Department of the Interior, Washington, DC. 103 p.
Environmental Laboratory. 1987. Corps of Engineers Wetlands Delineation Manual, Technical
Report Y-87-1. US Army Engineer Waterways Experiment Station, Vicksburg, Mississippi.
100 p., plus appendices.
Federal Emergency Management Agency (FEMA). 2015. FEMA Flood Map Service Center.
Available online at: https://msc.fema.gov/portal. Accessed March 16, 2015.
Federal Register. 2015. Definition of “Waters of the United States” Under the Clean Water Act Proposed Rule; Notice of Availability. https://federalregister.gov/a/2014-25138. Accessed March 18, 2015.
Lichvar R.W. M. Butterwick, N.C. Melvin, and W.N. Kirchner. 2014. The National Wetland Plant
List: 2014 Update of Wetland Ratings. Phytoneuron 2014-41: 1-42.
Munsell. 2000. Munsell Soil Color Charts. Macbeth Division of Kollmorgan Instruments. New
Windsor, NY.
National Agriculture Imagery Program (NAIP). 2013. Orthographic Aerial Photography, Bozeman,
Montana.
Natural Resources Conservation Service (NRCS). 2006. Digital General Soil Map of the U.S.
Available online at: http://pubs.er.usgs.gov/publication/70046648. Accessed March 16, 2015. _____. 2010. Field Indicators of Hydric Soils in the United States. A Guide for Identifying and
Delineating Hydric Soils, Version 7.0, 2010. _____. 2015. Web Soil Survey. Available at
http://websoilsurvey.sc.egov.usda.gov/App/HomePage.htm. Accessed March 16, 2015.
United States Army Corps of Engineers (USACE). 2010. Regional Supplement to the Corps of
Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region, Version 2.0. U.S. Army Engineer Research and Development Center. Vicksburg, MS.
_____. 2014. National Wetland Plant List, version 3.2. Available online at: http://wetland_plants.usace.army.mil/. Accessed March 16, 2015.
United States Army Corps of Engineers (USACE) and United States Environmental Protection Agency (EPA). 2014. Definition of ‘‘Waters of the United States’’ Under the Clean Water
Act. Federal Register 79(76): 22188-22274. http://www.gpo.gov/fdsys/pkg/FR-2014-04-21/pdf/2014-07142.pdf. Accessed March 18, 2015.
POWER ENGINEERS, INC. Wetland and Waterway Delineation Report
HLY 032-037(PER 02 01) MSWR (3/26/15) 137861 EN PAGE 12
United States Environmental Protection Agency (EPA). 2008. Clean Water Act Jurisdiction
Following the U.S. Supreme Court's Decision in Rapanos v. United States & Carabell v. United States.
http://water.epa.gov/lawsregs/guidance/wetlands/upload/2008_12_3_wetlands_CWA_Jurisdic
tion_Following_Rapanos120208.pdf. Accessed March 18, 2015.
United States Fish and Wildlife Service (USFWS). 2015. National Wetland Inventory (NWI) Mapper. Available online at: http://www.fws.gov/wetlands/Data/Mapper.html. Accessed March 16, 2015.
United States Geologic Survey (USGS). 1998. 7.5-minute Topographic Quadrangle Map. Bozeman, Montana.
_____. 2015. National Hydrography Dataset Mapper. Available online at http://nhd.usgs.gov/. Accessed March 16, 2015.
POWER ENGINEERS, INC. Wetland and Waterway Delineation Report
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FIGURES
POWER ENGINEERS, INC. Wetland and Waterway Delineation Report
HLY 032-037(PER 02 01) MSWR (3/26/15) 137861 EN PAGE 14
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WESTLAKE VILLAGE SUBDIVISION
T1S, R5E, SECTION 26
BOZEMAN, GALLATIN COUNTY, MONTANA
USGS 1:24,000 TOPOGRAPHIC QUADRANGLE MAPS: BOZEMAN (1998)
PROJECT
AREA
( IN FEET )
0 5000
TOPOGRAPHIC / VICINITY MAP
WESTLAKE VILLAGE SUBDIVISION
.
FIG. 1
BOZEMAN MONTANA
PROJECT NO.
FIGURE NUMBER
K:\CIVIL 3D PROJECTS\Civil 3D Projects\15011\ACAD\EXHIBITS\FIG 1 - VIC MAP.dwg Plotted on Mar/23/2015 03/2015Date:
AERIAL MAP
2013 NAIP ORTHOGRAPHIC AERIALPHOTOGRAPH
PROJECT
AREA
( IN FEET )
0 1000
E
V
A
L
L
E
Y
C
E
N
T
E
R
R
D
CATAMOUNT ST
DA
V
I
S
L
N
IN
T
E
R
S
T
A
T
E
9
0
F
R
O
N
T
A
G
E
R
D
N
2
7
T
H
A
V
E
N
1
9
T
H
A
V
E
T
O
B
E
L
G
R
A
D
E
WESTLAKE RD
WESTLAKE VILLAGE SUBDIVISION
.
FIG. 2
BOZEMAN MONTANA
03/2015
PROJECT NO.
FIGURE NUMBER
Date:K:\CIVIL 3D PROJECTS\Civil 3D Projects\15011\ACAD\EXHIBITS\FIG 2 - AERIAL MAP.dwg Plotted on Mar/23/2015
WEB SOIL SURVEY
PROJECT
AREA
( IN FEET )
0 600
Gallatin County Area, Montana (MT622)
50B Blackdog silt loam, 0 to 4 percent slopes
748A Hyalite-Beaverton complex, 0 to 4 percent slopes
United States Department of Agriculture
Natural Resources
Conservation Service
SOILS MAP
WESTLAKE VILLAGE SUBDIVISION
.
FIG. 3
BOZEMAN MONTANA
03/2015
PROJECT NO.
FIGURE NUMBER
Date:K:\CIVIL 3D PROJECTS\Civil 3D Projects\15011\ACAD\EXHIBITS\FIG 3 - SOILS MAP.dwg Plotted on Mar/23/2015
E
V
A
L
L
E
Y
C
E
N
T
E
R
R
D
CATAMOUNT ST
DA
V
I
S
L
N
F
R
O
N
T
A
G
E
R
D
N
2
7
T
H
A
V
E
WESTLAKE RD
IN
T
E
R
S
T
A
T
E
9
0
LEGEND
50B SOIL DESIGNATION
SOIL BOUNDARY
NWI-NHD MAP
WESTLAKE VILLAGE SUBDIVISION
U.S. FISH & WILDLIFE SERVICE - NATIONAL WETLANDS INVENTORY
USGS NATIONAL DATASET HYDROGRAPHY
.
FIG. 4
BOZEMAN MONTANA
JCH
ESN
03/2015
PROJECT NO.
FIGURE NUMBER
DRAWN BY:
CHK'D. BY:
APPR. BY:
DATE:
K:\CIVIL 3D PROJECTS\Civil 3D Projects\15011\ACAD\EXHIBITS\FIG 4- NWI-NHD-FEMA.dwg Plotted by jh on Mar/23/2015
ESN
( IN FEET )
0 500 E
V
A
L
L
E
Y
C
E
N
T
E
R
R
D
CATAMOUNT ST
DA
V
I
S
L
N
IN
T
E
R
S
T
A
T
E
9
0
F
R
O
N
T
A
G
E
R
D
N
2
7
T
H
A
V
E
T
O
B
E
L
G
R
A
D
E
WESTLAKE RD
PEM: PALUSTINE,
EMERGENT WETLAND
PABGX: PALUSTRINE, AQUATIC
BED, INTERMITTENTLY EXPOSED,
EXCAVATED - FRESHWATER POND
LEGEND
WATER BODY
PERENNIAL STREAM
NHD DATASET
NWI DATASET
PABFh
PE
M
PEM
PE
M
PEM
PEM
PEM
PROJECT
AREA
WETLAND / WATERWAY DELINEATION MAP
( IN FEET )
0 300
E
V
A
L
L
E
Y
C
E
N
T
E
R
R
D
IN
T
E
R
S
T
A
T
E
9
0
N
2
7
T
H
A
V
E
WESTLAKE RD
WESTLAKE VILLAGE SUBDIVISION
.
FIG. 5
BOZEMAN MONTANA
03/2015
PROJECT NO.
FIGURE NUMBER
Date:K:\CIVIL 3D PROJECTS\Civil 3D Projects\15011\ACAD\EXHIBITS\FIG 5 WETLAND DELIN MAP.dwg Plotted on Mar/23/2015
WW-1
ORDINARY HIGH WATER
WETLAND/WATERWAY
SAMPLE POINT
LEGEND
S-1-1S-1-1
DELINEATED WETLAND
INVESTIGATION AREA
BOUNDARY
WETLAND/WATERWAY
CONTINUATION
*NOTE: FINAL JURISDICTIONAL DETERMINATIONS
WILL BE PROVIDED BY THE U.S. ARMY CORPS OF
ENGINEERS.
DESIGNATION
S-1-1S-1-1
S-1-3S-1-3
S-1-4S-1-4
S-1-2S-1-2
WW-1
WETLAND DETAIL
SCALE: 1"=100'
S-1-1S-1-1
S-1-3S-1-3S-1-4S-1-4
S-1-2S-1-2
W-1
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POWER ENGINEERS, INC. Wetland and Waterway Delineation Report
APPENDIX A WETLAND/WATERWAY PHOTOGRAPHS
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Photo 1. View southwest of S-1 1, wetland data point. Photo 2. View south of S-1 2, upland data point.
Photo 3. View southwest of S-1 3, upland data point. Photo 4. View southwest of S-1 4, upland data point.
Photo 5. View south of pond draining into the wetland/stream. Photo 6. View east of wetland W-1 and waterway WW-1.
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POWER ENGINEERS, INC. Wetland and Waterway Delineation Report
APPENDIX B USACE WETLAND DETERMINATION
DATASHEETS
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