HomeMy WebLinkAboutFOX GROVE PHASE 2 - PDP190002 - SUBMITTAL DOCUMENTS - ROUND 1 - ENVIRONMENTAL REPORTFox Grove Phase II
Environmental Characterization Study
January, 2019
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Table of Contents
1.0 Introduction ................................................................................................................................ 1
2.0 Site Description ........................................................................................................................... 1
3.0 Methods ...................................................................................................................................... 2
3.1 Desktop Review ..................................................................................................................... 2
3.2 Site Assessment ..................................................................................................................... 2
4.0 Ecological characterization ........................................................................................................... 5
4.1 Vegetation ............................................................................................................................. 5
4.1.1 Noxious Weeds ..................................................................................................... 5
4.2 Wetlands ............................................................................................................................... 6
4.3 Wildlife .................................................................................................................................. 7
4.3.1 Big Game .............................................................................................................. 8
4.3.2 Predators .............................................................................................................. 8
4.3.3 Other Mammals..................................................................................................... 8
4.3.4 Raptors ................................................................................................................ 9
4.3.5 Upland Game Birds ................................................................................................ 9
4.3.6 Waterfowl and Shorebirds ...................................................................................... 9
4.3.7 Other Birds ........................................................................................................... 9
4.3.8 Amphibians, Reptiles, and Aquatic Species ............................................................ 10
4.4 Prominent Views .................................................................................................................. 11
4.5 Sensitive and Specially Valued Species .................................................................................. 11
4.6 Wildlife Migration Corridors ................................................................................................... 13
4.7 General Ecological Functions ................................................................................................. 13
4.8 Timing of Development in Relation to Ecological Character ..................................................... 13
5.0 Mitigation meastures and Recommendations ............................................................................... 13
6.0 Literature Cited and Data Sources .............................................................................................. 15
Appendix A: Datasheets (Wetland and Typology) .................................................... Following Page 14
Appendix B: Photographs .................................................................................. Following Appendix A
In-text Maps and Tables
Map 1. Fox Grove Phase II Site Location, Boundary, and Features ......................................................... 4
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Fox Grove Phase II
Environmental Characterization Study
Imago Enterprises, Inc.
1.0 INTRODUCTION
Imago Enterprises, Inc. proposes to construct 49 single-family dwelling units directly west of the Fox
Grove Phase I development and the Sunflower Adult Community (Site). The Site is within 100 feet of
known natural habitats of high value to the City of Fort Collins (City) – Boxelder Creek and associated
wetlands. Thus, an Ecological Characterization Study is required, under Article 3, Section 3.4.1 of the
City’s Land Use Code. This report describes the ecological conditions and functions observed at the Site.
Section 2.0 provides a Site description, Section 3.0 presents the methodologies used, Section 4.0 contains
a summary of findings, and Section 5.0 provides potential mitigation measures and recommendations. At
the rear of the document, Appendix A includes data sheets and Appendix B contains a photo log.
2.0 SITE DESCRIPTION
The Site is located in northeast Fort Collins, approximately 0.5 miles southeast from the intersection of
Highway 14 (Mulberry Road) and I-25, and due west of the Fox Grove Phase I project. The 10-acre Site
is entirely within the Section 15, Township 7 North, Range 68 West, of the Sixth Principal Meridian. Near
the center of the Site the coordinates are 40°34’31.31”N and 104°59’53.01”W.
The non-irrigated Site lies at an approximate elevation of 4,930 feet. Topographically, the Site is very
level with minimal slope. The eastern boundary is at approximately the same elevation as the adjacent
properties (including the Sunflower Adult Community and Fox Grove Phase I site), the southern boundary
is a deep drainage ditch, and the northern boundary slopes gently (3-5% slopes) downhill. The western
boundary is built up approximately ten feet higher the Boxelder Creek terrace (Plate 3). A detention
basin (Plate 5) and drainage channel (Plate 6) has been excavated in the southeast corner of the Site.
The majority of the Site was formerly an agricultural field. A gravel pedestrian trail runs along the
majority of the perimeter of the Site.
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Boxelder Creek, a perennial first-order stream flowing from north to south and eventually draining into
the Cache la Poudre River, never enters the Site but meanders from the northeast of the Site, veers to
the south at the northwest corner of the Site, and then mirrors the western Site boundary. Boxelder
Creek is as close as 50 feet to the western Site boundary.
3.0 METHODS
3.1 Desktop Review
A data review was conducted to gather information and assist in the evaluation of potential natural
biological resources within the property. The data review entailed an evaluation of online resources and
publications to determine the presence or potential occurrence of important natural and biological
resources. This data review included:
U.S. Fish and Wildlife Service (USFWS) Federally Listed and Proposed Endangered, Threatened,
and Candidate Species and Critical Habitat as identified by the USFWS Information, Planning, and
Conservation System (IPaC) Official Species List and Critical Habitat Mapper;
Migratory Bird Treaty Act (MBTA) and Bald and Golden Eagle Protection Act (BGEPA) protected
species as identified on the IPAC Trust Resources Report;
The Colorado Natural Heritage Program database statewide species and natural community
tracking list for Larimer County;
Colorado Parks and Wildlife (CPW) Threatened and Endangered Species List;
Species identified as in need of protection in the City’s Natural Areas Policy Plan;
The City’s Land Use Code (Article 3, Section 3.4.1);
The City’s Natural Habitat and Features Inventory Map (2000);
USFWS National Wetlands Inventory (NWI); and
US Natural Resources Conservation Service (NRCS) Web Soil Survey.
3.2 Site Assessment
The entirety of the Site was traversed on foot to qualitatively evaluate site conditions, determine
presence of significant plant communities, determine presence of significant wildlife species or habitats,
and delineate wetlands. The wetland delineation was conducted following the methodology described in
the 1987 Corps of Engineers Wetland Delineation manual and the 2010 Regional Supplement to the
Corps of Engineers Wetland Delineation Manual: Great Plains Region. To gain an understanding of the
hydrology, several soil test pits were dug, dominant vegetation was observed, and hydrolologic indicators
were noted at each soil test pit location. Data was recorded on Corps of Engineers data sheets
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(Appendix A). Photographs were taken to document site conditions at test pits and data sampling points
(Plates 10 through 18).
Additionally, the Site and Boxelder Creek were evaluated with a typology developed by Cedar Creek
Associates to provide a snapshot of ecological features, quality, and services (Appendix A).
Surveys were conducted by Cedar Creek’s Range/Wildlife Ecologist, Mr. Scott Benton, on December 18,
2018. Mr. Benton has 13 years of experience as an environmental consultant, performing numerous
wetland delineations, wildlife (bird, reptile, mammal, and fish) surveys, and vegetative inventories, as
well as becoming familiar with the major of regulatory requirements for development projects. Mr.
Benton also completed a Masters of Science degree in natural resources in 2015.
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Table 1: Area G Identified Wetlands & Waters - 2013 / 2016
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4.0 ECOLOGICAL CHARACTERIZATION
4.1 Vegetation
Because almost the entirety of the Site is formerly an agricultural field, vegetative communities consist
almost entirely of upland ruderal, annual species and weeds (Table 1). Only two native, perennial
species were observed at the Site – western wheatgrass (Pascopyrum smithii) and rubber rabbitbrush
(Chrysothamnus nauseousus). Only one tree was observed on Site, a mature elm (Ulmus sp.) larger than
six inches in diameter, in the drainage ditch in the extreme southeast corner. Corn stubble is present in
the southern half of the Site (Plate 7). The detention basin and channel were dry and bare upon field
evaluation, and no mesic or hydric vegetation present; the upland ruderal vegetation community was
continuous to the edge of the bare ground.
Natural habitats supported by Boxelder Creek are present to the west and north immediately adjacent to
the Site. These are characterized by a greater dominance of native perennial grasses (western
wheatgrass), occasional shrub patches (willows), and patches of riparian forest dominated by cottonwood
(Populus deltoides), Siberian elm, and Russian olive (Eleagnus angustifolia).
4.1.1 Noxious Weeds
A total of six noxious weeds were observed throughout the Site and adjacent areas (Table 1). Most
noxious weeds were observed sporadically, however, a large patch of Canada thistle (Cirsium arvense)
was observed on the extreme northern edge extending off Site.
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4.2 Wetlands
NWI depicts two PEM1A wetlands bordering Boxelder Creek to the north (15.15 acres) and west (8.23
acres) of the Site; they are bisected by a PSSC wetland (2.08 acres). A PEM1A wetland is a freshwater
emergent wetland characterized by persistent, herbaceous hydrophytic vegetation and experiences
temporary flooding by surface water during the growing season. A PSSC wetland is a freshwater
forested/shrub wetland characterized by dominant woody vegetation and surface water present early in
the growing season. Soil types occurring on the site are summarized in Table 2. Soils according to WSS
are generally gently sloping, well-drained loams, sandy loams, and clay loams, and not hydric. The
exception is Riverwash type, a hydric soil characterized by excessive drainage and soil profile from
gravelly sand to clay found on the extreme western edge of the Site. While mapped in the Site by WSS,
the Riverwash soils are likely not present on Site as it is forming the Boxelder Creek stream bank/terrace,
and the Site is built up significantly higher than the stream terrace. A wetland was previously delineated
along Boxelder Creek on February 19, 2016 adjacent to the northwest corner of the Site to insure no
deleterious effects from a utilities installation for the Fox Grove Phase I project (Map 1).
Table 1 Fox Grove - Vegetation Observed On and Adjacent to Site
Scientific Name Common Name On Site
Adjacent
to Site
Comments
Grasses and Grass-likes
X A Anisantha tectorum Cheatgrass X Colorado noxious weed C-List
I P Bromus inermis Smooth Brome X X
P Cyperus sp. Flatsedge X Speciation difficult due to time of year
I P Dactylis glomerata Orchard Grass X
N P Elymus trachycaulus Slender Wheatgrass X
N P Pascopyron smithii/Elymus lanc. Western Wheatgrass X X Speciation difficult due to time of year
I P Poa pratensis Kentucky Bluegrass X
Forbs
N P Asclepias speciosa Showy Milkweed X Small number along Boxelder Creek
X P Cardaria draba Whitetop X Colorado noxious weed B-List
X P Carduus nutans Nodding Plumeless Thistle X Colorado noxious weed B-List
X P Cirsium arvense Canada Thistle X X Colorado noxious weed B-List
X P Convolvulus arvensis Field Bindweed X X Colorado noxious weed C-List
N A Descurainia pinnata Western Tansymustard X X
N A Helianthus annuus Common Sunflower X
N P Heterotheca villosa Hairy Golden Aster X
I P Rumex crispus Curly Dock X X
I A Salsola kali/tragus Russian Thistle X
I B Tragopogon dubius False Salsify X
I B Verbascum thapsus Common Mullein X
Sub-Shrubs, Shrubs, & Trees
N P Chrysothamnus nauseosus Rubber Rabbitbrush X X
I P Eleagnus angustifolia Russian Olive X Colorado noxious weed B-List; North of site
N P Populus deltoides Cottonwood X Present along Boxelder Creek
N P Salix sp. Willow X Speciation difficult due to time of year
I P Ulmus pumila Siberian Elm X X Present along Boxelder Cr. and drainage ditch
N=Native, Nw=Warm Season, I=Introduced, X=Noxious A=Annual, B=Biennial, P=Perennial
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Five wetland sample points were sampled with no points qualifying as wetlands (Map 1, Appendices A
and B) (sample points are referred to as ‘Wet 1’, ‘Wet 2’, etc. on the wetland datasheets and plates).
Four of the points were located in the most likely areas to display the characteristics of a wetland –
Sample 1 (Plates 10 and 11) and 2 (Plates 12 and 13) were located in local depressions, and Sample 3
(Plates 14 and 15) and 4 (Plates 16 and 17) were located along the Boxelder Creek terrace. No GPS
point was taken at Sample 4; it lies approximately 20 feet due west of Sample 5. The fifth point (Sample
5, Plates 18 and 19) was located on the built-up slope to provide an upland contrast. The ‘wettest’ point,
Sample 2, displayed the characteristics of Riverwash soils as well as a water table at 18 inches of depth.
Field surveys indicate that wetlands are not as extensive as what NWI maps. Winter is not an ideal time
to delineate wetlands, but if judged conservatively (highest water table of any point sampled, close
proximity to Boxelder Creek, and concave topography), it is possible that Sample 2 lies within a wetland.
Sample 2 lies in a depression that is approximately 25 feet in diameter (0.01 acres) and lies entirely
within the buffer of Boxelder Creek. Any wetlands present along Boxelder Creek are likely jurisdictional
due to the fact that the Creek ultimately drains to the Cache la Poudre River, but final jurisdictionality lies
with the US Army Corps of Engineers.
4.3 Wildlife
Despite the absence of natural habitats the Site itself does support common opportunistic wildlife species
(Table 3). Eastern cottontails (Sylvilagus floridanus), voles (Microtus sp.), and black-tailed prairie dogs
(Cynomys ludovicianus) provide prey for carnivores (i.e., coyotes - Canis latrans) and raptors. An
Table 2 Fox Grove - Soils Occurring on the Site
Soil Map Unit Number
and Name
Description Hydric
24 - Connerton-Barnum
Complex, 0-3% slopes
Well-drained loam and sandy loam; depth to water table more
than 80 inches.
No
34 - Fort Collins loam, 0-1%
slopes
Well-drained loam and clay loam; depth to water table more than
80 inches.
No
53 - Kim loam, 1-3% slopes
Well-drained loam and clay loam; depth to water table more than
80 inches.
No
54 - Kim loam, 3-5% slopes
Well-drained loam and clay loam; depth to water table more than
80 inches.
No
55 - Kim loam, 5-9% slopes Well-drained clay loam; depth to water table more than 80 inches. No
73 - Nunn clay loam, 0-1%
slopes
Well-drained clay loam; depth to water table more than 80 inches. No
92 - Riverwash, 0-3%
slopes
Somewhat excessively drained, stratified from gravelly sand to
clay; frequently flooded.
Yes
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American kestrel (Falco sparverius) was observed perched in the elm tree in the southeast corner of the
Site, and white-crowned sparrows (Zonotrichia leucophrys) were observed perching on the taller dead
vegetation. The greater habitat diversity found along Boxelder Creek likely supports a greater number of
wildlife species, but habitat quality is lowered by the urban location and proximity to the I-25 corridor.
4.3.1 Big Game
Three big game animals could potentially frequent the property and adjacent area year round –
pronghorn antelope (Antilocapra americana), white tailed deer (Odocoileus virginianus), and mule deer
(Ococoileus hemionus). The value of the Site and adjacent areas to big game is low due to the urban
location and proximity to the I-25 corridor, and will continue to decline as urban development increases.
No crucial big game habitats are recognized on Site. Boxelder Creek could provide some cover/shelter
for big game, although due to the patchy nature of the riparian forest its value as a larger movement
corridor is limited.
4.3.2 Predators
Mid-sized predators including red fox (Vulpes vulpes) and coyote (Canis latrans) would be expected to
occasionally frequent the Site and adjacent properties. Mink (Neovison vison), long-tailed weasel
(Mustela frenata), and badger (Taxidea taxus) would be less common visitors. Coyote scat was observed
(Table 3). Despite supporting prey species on the Site and adjacent Boxelder Creek (Eastern cottontail
and voles, Table 3), the value to predators is still relatively low due to the urban location and proximity to
the I-25 corridor, and will continue to decline as urban development increases.
4.3.3 Other Mammals
Eastern cottontails and black-tailed prairie dogs were the only other mammals directly observed on and
adjacent to the Site, while the remnants of vole tunnels and the scat and tracks of raccoons (Procyon
lotor) were observed (Table 3). A variety of small and medium sized mammal species are known to
occur locally, although not observed during field surveys – striped skunk (Mephitis mephitis) which thrive
in urban areas, and small rodents including mice, rats, ground squirrels, and chipmunks. Such prey
species are cyclically common, widespread throughout the region, and are important food sources for
raptors and other predators. Muskrat (Ondatra zibethicus) and beaver (Castor canadensis) could
potentially utilize Boxelder Creek, but the likelihood is low. Various bats could also frequent adjacent
Boxelder Creek but are unlikely to utilize the Site. Two common bat species that are consistently found
in Fort Collins and roost primarily in trees are hoary bats (Lasiurus cinereus) and silver-haired bats
(Lasionycteris noctivagans).
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4.3.4 Raptors
An American kestrel was the only raptor species directly observed on Site, but the presence of prairie
dogs provides potential burrowing owl (Athene cunicularia) habitat. Raptor species known to occur in the
region include turkey vulture (Cathartes aura), bald eagle (Haleaeetus leucocephalus), golden eagle
(Aquila chrysateos), ferruginous hawk (Buteo regalis), Swainson’s hawk (Buteo swainsoni), northern
harrier (Circus cyaneus), red-tailed hawk (Buteo jamaicensis), rough-legged hawk (Buteo lagopus), and
prairie falcon (Falco mexicanus). Some of these species are year round residents, some are seasonal
visitors, and some are migrants. Owl species which could potentially frequent the property include the
barn owl (Tyto alba), great horned owl (Bubo virginianus), long-eared owl (Asio otus), and short-eared
owl (Asio flammeus). There is no suitable habitat for the northern goshawk (Accipiter gentilis), screech
owl (Megascops spp.), or peregrine falcon (Falco peregrinus). Raptor nesting habitat on Site is not
present, but is present along Boxelder Creek. No raptor nests were observed during field surveys. There
is no suitable bald eagle winter roost habitat.
4.3.5 Upland Game Birds
No upland game birds were observed on or adjacent to the Site. Four species of upland game birds may
occur on Site – mourning dove (Zenaida macroura), wild turkey (Meleagris gallopavo), gray (or
Hungarian) partridge (Perdix perdix), and ring-necked pheasant (Phasianellus colchicus).
4.3.6 Waterfowl and Shorebirds
Canada geese (Branta canadensis) were observed as flyovers, but none were observed utilizing the Site
directly. The Site itself provides little value to waterfowl and shorebirds, but Boxelder Creek has the
potential to provide marginal habitat to resident or water-obligate migratory stopovers. Such species
include mallards (Anas platyrhynchos), American wigeon (Anas Americana), wood duck (Aix sponsa),
great blue heron (Ardea Herodias), gulls, belted kingfisher (Megaceryle alcyon), swifts, and swallows.
The Site and adjacent areas is not a concentration area for migratory or nesting waterfowl or shorebirds.
Boxelder Creek is too close to the I-25 corridor, too small, and freezes over during wintertime, making it
less attractive for concentrations of waterfowl or shorebirds.
4.3.7 Other Birds
A limited number of birds would be expected to utilize the available ruderal habitats on Site – American
crow (Corvus brachyrhynchos), American robin (Turdus migratorius), sparrows, house finch (Haemorhous
mexicanus), magpies (Pica pica), pigeon (Columbalivia domestica), grackle (Quiscalus quiscula), Eurasian
collared doves (Steptopelia decaocto), and killdeer (Charadrius vociferous). Ground nesting birds are
unlikely to nest on Site due to the lack of perennial bunch grasses and shrubs. Boxelder Creek and its
pockets of riparian forest provides habitat for various woodpeckers, sparrows, black-capped chickadee
(Poecile atricapillus), red-winged blackbird (Agelaius phoeniceus), kingbirds, and jays (Cyanocitta spp.).
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American crow, Amercan robin, northern flicker, and white-crowned sparrow were observed on Site and
adjacent areas.
4.3.8 Amphibians, Reptiles, and Aquatic Species
On Site there is no aquatic habitat, thus eliminating the possibility of fish, aquatic invertebrates, and most
amphibians. The presence of small mammals provides suitable prey base for common upland reptile
species, including the bull snake (Pituophis melanoleucas), prairie rattlesnake (Crotalus viridis), eastern
yellow-bellied racer (Coluber constrictor flaviventris), and plains hog-nosed snake (Heterodon nasicus).
No reptiles or amphibians were observed during field surveys due to the time of year.
Adjacent to the Site, Boxelder Creek (which was frozen during field surveys) provides some perennial
aquatic habitat, albeit of lower quality. The lack of deep water limits the presence and diversity of fish
and macroinvertebrates. The Creek could provide habitat for locally common riparian amphibian and
reptiles, including the western chorus frog (Pseudacris triseriata), bullfrogs (Lithobates catesbeianus),
plains spadefood (Spea bombifrons), Woodhouse’s toad (Bufo woodhousei), tiger salamander
(Ambystoma tigrinum), and the plains garter snake (Thamnophis radix). Less common riparian species
include the common garter snake (Thamnophis sirtalis), wandering (terrestrial) gartersnake (Thamnophis
elegans vagrans), western painted turtle (Chrysemsys picta bellii), eastern snapping turtle (Chelydra
serpentina serpentina), and ornate box turtle (Terrapene ornata ornata).
Table 3 Fox Grove - Wildlife Observed On and Adjacent to Site
Direct Sign
Birds
American Crow Corvus brachyrhynchos X Flyover
American Robin Turdus migratorius X
American Kestrel Falco sparverius X
Canada Goose Branta canadensis X Flyover
Northern Flicker Colaptes auratus X
White-Crowned Sparrow Zonotrichia leucophrys X
Mammals
Coyote Canis latrans X Scat observed
Eastern Cottontail Sylvilagus floridanus X
Racoon Procyon lotor X Scat and tracks observed
Voles Microtus sp. X Tunnels observed
Common Name Scientific Name
Observation
Type Comments
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4.4 Prominent Views
Views across the Site to the east are met with dense residential development and properties under
development, to the north views are met with 300 feet of open space before encountering commercial
development (Plate 4), and to the south views across the Site views are met with a large drainage
channel and active agricultural field (Plates 2 and 8). The prominent across the Site is to the west where
the trees along Boxelder Creek, the I-25 corridor, and eventually the Rocky Mountains can be seen (Plate
1).
4.5 Sensitive and Specially Valued Species
A current list of federally threatened, endangered, proposed, and candidate species, and designated
critical habitat that may occur within the boundary of the Site and/or may be affected by the proposed
development was obtained from the USFWS IPaC website (2018). Table 4 lists the species and their
designated and proposed critical habitats. No USFWS designated critical habitat occurs in or near the
Site.
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Table 4 Fox Grove - Special Status Species with Potential to Occur on the Site Page 1 of 2
Species
Federal
Status
1 Habitat
Habitat
Present?
Determination
North Platte, South Platte, and Laramie River Basin Species
Least Tern
Sterna antillarum
Piping Plover
Charadrius melodus
Whooping Crane
Grus americana
Pallid Sturgeon
Scaphirhynchus albus
Western Prairie Fringed Orchid
Platanthera praeclara
Mammals
Canada Lynx
Lynx canadensis
North American Wolverine
Gulo gulo luscus
Preble's Meadow Jumping Mouse
Zapus hudsonius preblei
Birds
Mexican Spotted Owl
Stri occidentalis lucida
Fish
Greenback Cutthroat Trout
Oncorhynchus clarkii stomias
Insects
Arapahoe Snowfly
Arsapnia arapahoe
Flowering Plants
Colorado Butterfly Plant
Gaura neomexicana v. coloradensis
North Park Phacelia
Phacelia formosula
Ute Ladies'-tresses
Spiranthes diluvialis
Source: USFWS 2018
1DL = Delisted, E = Federally Endangered, T = Federally Threatened, PT = Proposed Threatened, C = Candidate
No No Effect
An early successional plant (although probably not a
pioneer) adapted to use stream channel sites that are
periodically disturbed. It occurs on subirrigated, alluvial
soils on level or slightly sloping floodplains and drainage
channels.
T
T
This species inhabits cold water streams and lakes with
adequate stream spawning habitat during spring.
No No Effect
No No Effect
Seasonally moist soils and wet meadows of drainages
below 7000' elevation.
T
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4.6 Wildlife Migration Corridors
The Site is located in mostly developed areas of the City and surrounded by commercial and residential
development, the I-25 corridor, and active agricultural fields. It is highly unlikely that the Site serves as a
migration corridor for sensitive, unique, or regionally protected wildlife. Adjacent areas may provide
some migratory benefit to resident urban-adapted wildlife such as red foxes, raccoons, coyotes, and
skunks, and it may provide temporary stopover habitat for migrating birds. Resulting changes to wildlife
corridor quality should be minimal because the property is located in a developed area where wildlife are
already accustomed to structures, roads, bridges, fences, buildings, and other habitat modifications.
4.7 General Ecological Functions
The general ecological functions provided by the Site have been reduced by multiple human-induced
stressors including agricultural production, suburban development, and commercial development. The
riparian forest and associated habitats along Boxelder Creek provide shading, cover, and nesting
opportunity for a variety of wildlife species, flood abatement, water infiltration, and aesthetic appeal.
4.8 Timing of Development in Relation to Ecological Character
The MBTA specifically protects migratory birds and their nests from possession, sale, purchase, barter,
transport, import, export, and take. The regulatory definition of take (50 CFR 10.12) means to pursue,
hunt, shoot, wound, kill, trap, capture, or collect, or to attempt these actions. Federal and Colorado state
laws also prohibit the harming or killing of burrowing owls and the destruction of active nests. Burrowing
have the potential to nest on-site given the presence of black-tailed prairie dogs.
It is recommended that ground-disturbing activities be conducted from late summer to late winter to
avoid the avian nesting and breeding season. If that is not compatible with construction schedules, an
additional survey should be implemented prior to commencement of ground-disturbing activities to insure
compliance with the MBTA. Colorado Division of Parks and Wilflife recommends conducting burrowing
owl surveys from March 15 to October 31.
5.0 MITIGATION MEASTURES AND RECOMMENDATIONS
Mitigation measures are unlikely to be needed for any ecological features on the Site due to its history of
disturbance as a former agricultural field and current ruderal state. Only one mature tree over six inches
in diameter exists on Site, and it is located in a large drainage ditch that also serves as drainage for the
Fox Grove Phase I development.
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Boxelder Creek and any potential wetlands are not within Site boundaries, however, the Site plan does
place development within the 100 foot buffer zone required by the City’s Land Use Code. Potential
mitigation measures include shifting lot locations away from the western Site boundary, potentially
placing open space, recreational areas, or other areas acceptable to the City within the buffer zone.
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6.0 LITERATURE CITED AND DATA SOURCES
City of Fort Collins. 2000. Natural Habitat and Features Inventory Map.
Colorado Parks and Wildlife. Threatened and Endangered Species List.
https://cpw.state.co.us/learn/Pages/SOC-ThreatenedEndangeredList.aspx. Accessed 12/17/2018.
Soil Survey Staff, Natural Resources Conservation Service, United States Department of Agriculture. Web
Soil Survey. Available online at https://websoilsurvey.sc.egov.usda.gov/. Accessed 12/17/2018.
USACE. 1987. Corps of Engineers Wetland Delineation Manual.
USACE. 2010. Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Great Plains
(Version 2.0).
US Fish and Wildlife Service. Information, Planning, and Conservation System (IPaC).
https://ecos.fws.gov/ipac/. Accessed 12/17/2018.
US Fish and Wildlife Service. National Wetlands Inventory (NWI) Wetlands Mapper.
https://www.fws.gov/wetlands/. Accessed 12/17/2018.
Appendix A
Wetland and Typology Data Sheets
4 Excellent
3 Good
2 Fair
1 Poor
N/A N/A
4 Excellent
3 Good
2 Fair
1 Poor
N/A N/A
4 Excellent
3 Good
2 Fair
1 Poor
N/A N/A
4 Excellent
3 Good
2 Fair
1 Poor
N/A N/A
4 Excellent
3 Good
2 Fair
1 Poor
N/A N/A
4 Excellent
3 Good
2 Fair
1 Poor
N/A N/A
B2. Species of Concern (IPaC and/or CNHP should be reviewed prior to field effort to support this evaluation)
Known or observed presence of Species of Concern
High quality habitat features with sufficient opportunities to support Species of Concern.
Medium quality habitat features with moderate opportunities to support Species of Concern.
Low quality habitat features with need for improvements to support Species of Concern.
This is not suitable habitat for species of concern.
B. Wildlife Habitat
A1. Plant Diversity (N/A for traditional park spaces)
A2. Habitat Diversity (N/A for traditional park spaces)
Landscape contains high quality habitat to support multiple wildlife types. Multiple wildlife habitat features are present such as cover, food sources, breeding areas, and protective
elements.
Landscape contains good quality habitat to support multiple wildlife types. Wildlife habitat features are present but not abundant.
Landscape contains moderate habitat to support some wildlife. Habitat features are limited, and wildlife present not likely to be diverse.
Landscape contains little to no wildlife habitat. Landscape is either degraded or habitat is not present to support wildlife.
Not applicable
(0-10%) There is no evidence of an active prairie dog colony, but there are holes and/or other indicators of a former prairie dog colony. (A TES survey may need to be done)
(10-50%) There is evidence of an active priarie dog colony, but it is not widespread.
The park is disconnected to other elements of the larger park system and/or has no proximity to trails; similar park features (i.e. trees, shrubs, open water areas); and/or there are
moderate to significant
barriers such as walls, roads, large urbanized areas, and dams. Lacks presence of outfalls or confluences in riparian or open water systems.
Not applicable
A. Biodiversity
(50-100%) There is extensive evidence of an active prairie dog colony.
This is not suitable habitat for prairie dog colonization.
GENERAL QUALITATIVE PARAMETERS
Overall Aesthetic
B1. Prairie Dog Habitat
(0%) There is no evidence of prairie dogs.
LANDSCAPE TYPOLOGY FIELD DATA SHEET
Landscape contains high species richness (number of species per unit area) and evenness (relative abundance of the different species making up the richness of an area) relative for that
4 Excellent
3 Good
2 Fair
1 Poor
N/A N/A
4 Excellent
3
Good
2
Fair
1
Poor
N/A N/A
4 None
3 Minor
2 Moderate
1 Major
N/A N/A
4 None
3 Minor
2 Moderate
1 Major
N/A N/A
4 None
3 Minor
2 Moderate
1 Major
N/A N/A
4 None
3 Minor
2 Moderate
1 Major
N/A N/A
48 -36
35 -23
22-10
less than 10
No user degradation.
Sustainability
MAINTENANCE QUALITATIVE PARAMETERS
Noxious Weed Population Description
Annual / Invasive Weed Population Description
Visual Water Quality (excluding upland typologies)
Poor quality landscape features with immediate need for improvement and maintenance intervention.
The site is composed of between 25% and 50% annual or invasive weeds.
The landscape contains defined unauthorized trails, exposed bare ground is forming in high traffic areas, trash scattered around the receptacles from passive littering, and vandalism
is evident on
structures within the landscape. Evidence of user degradation is between 10% and 30% of the landscape.
Not applicable
Indirect Human Impacts
Visible suspended solids within the water table, evidence of algal blooms, riparian buffer with little evidence of impairment, adequate hydraulic flow, and little trash and/or debris
evident within system.
Visible suspended solids within the water table, evidence of algae blooms, impaired riparian buffer, no hydraulic flow, and trash and/or debris evident within system.
High water clarity characterized with no visible suspended solids, no evident algal blooms, dense and undisturbed riparian buffer, adequate hydraulic flow, and no trash or debris.
Not applicable
No indications of surrounding land uses impacting ecological connectivity or functions. Little to no impacts to view-shed or noise-shed.
Few indications of surrounding land uses impacting ecological connectivity or functions, including oil & gas well pads, active agriculture fields, confined feed lot opertations, water
treatment plants, etc.
View-shed is somewhat impacted and human noise is discernable.
Several indications of surrounding land uses impacting ecological connectivity or functions, including oil & gas well pads, active agriculture fields, confined feed lot opertations,
4 Excellent
3 Good
2 Fair
1 Poor
N/A N/A
4 Excellent
3 Good
2 Fair
1 Poor
N/A N/A
4 Excellent
3 Good
2 Fair
1 Poor
N/A N/A
4 Excellent
3 Good
2 Fair
1 Poor
N/A N/A
Perennial
Intermittent
Ephemeral
N/A
Bedrock
Boulders
Riprap
Gravel
Sand
Silt/Clay
Concrete
N/A
STREAM CHARACTERISTICS
Choose a representative area of the stream segment and visually assess bank materials,
or excavate soils if needed, and indicate most dominant material.
The measurement of the angle of the bank from the lower bank, approximately at the
waterline, to the top of the stream bank. Choose a representative area and measure the
angle of the bank from the waterline to the top of the stream bank. Approximate the angle
of the bank or use an inclometer.
Represents the proportion of the stream bank surface, at or below bankfull, that is
occupied by roots, woody material, rocks, or other protective material. Choose an area
that appears representative of the steam segment. Assess areas of visible roots, or use
excavation, and determine proportion relative to soils. Calculate as a percentage.
Represents the proportion of the stream bank above bankfull that is occupied by roots of
riparian vegetation. Choose an area that appears representative of the steam segment, or
where roots are visible. Assess areas of visible roots or use excavation and determine
proportion of roots relative to soils, and calculate as a percentage.
Represents average depth of roots of riparian vegetation. Choose an area that appears
representative of the steam segment, or where roots are visible. Determine root depth by
observing areas of visible roots or removing soil to expose roots. Measure representative
Average root depth is less than or equal to 0.5 ft deep roots and determine average in feet.
Average root depth is between 0.5 ft to 1 ft deep
Average root depth is between 1 ft to 3 ft deep
Average root depth is greater than or equal to 3 ft deep
Water flowing continuously year-round
Less than 14 percent of the stream bank is occupied by protective materials
15 to 54 percent of the stream bank is occupied by protective materials
55 to 79 percent of the stream bank is occupied by protective materials
Root Density (Percent)
Surface Protection (Percent)
Types (cir. 1) Species (List) Cover 2 Cover 1 Cover 2 Cover
Insects No 0% % % %
Birds Yes 1% 1% % %
Insects & Birds No 20% 20% Can. Thistle 5% F. bindweed
None No 20% % Cheatgrass 5%
Excellent
Good
Fair
Poor
N/A
4 3 2 1 X Although diverse, early all species are ruderal, annual, undesirable, or noxious
4 3 2 1 X
4 3 2 1 X Prairie dogs present on western border of Site
4 3 2 1 X List species: NA
4 3 2 1 X
4 3 2 1 X Site is adjacent to Boxelder Creek
4 3 2 1 X Impacts in the form of abandoned ag. field, development activities
4 3 2 1 X I-25 corridor is nearby, home construction occuring adjacent
None
Minor
Moderate
Major
N/A
Excellent
Good
Fair
Poor
N/A
4 3 2 1 X
4 3 2 1 X
4 3 2 1 X
4 3 2 1 X
Feet
Intermittent Ephemeral Perennial X N/A
Bedrock Boulders Riprap Gravel
Sand Silt/Clay Concrete X N/A
Possible Ecosystem Services: (Circle Two Most Significant)
Other Comments, including wildlife species seen:
Site does support a small mammal population (E. cottontail, voles) and predator population (coyotes, raptors)
Hydrologic System (riparian & surface
water types): NA
Observer: S. Benton Sample ID: NA
1
X
X
2
2
2 1
25%
74% Rus. Thistle
STREAM
CHARACTERISTICS
(Stream Areas Only)
1 X
G. Noxious Weed Population
Description
4
X
H. Visual Water Quality (excluding
upland typologies)
Types (cir. 1) Species (List) Cover 2 Cover 1 Cover 2 Cover
Insects No 10% 7% Russian olive 3%
Birds Yes 15% % %
Insects & Birds No 2% % Can. Thistle 5%
None No 20% 5% %
Excellent
Good
Fair
Poor
N/A
4 3 2 1 X
4 3 2 1 X Some tree dominant area, some shrub dominant areas
4 3 2 1 X Prairie dogs present
4 3 2 1 X List species: NA
4 3 2 1 X Improves local visual aesthetic
4 3 2 1 X Boxelder Creek drains to Cache la Poudre River, but passes thru numerous culverts
4 3 2 1 X Impacts in the form of debris
4 3 2 1 X I-25 corridor is nearby, home construction occuring adjacent
None
Minor
Moderate
Major
N/A
Excellent
Good
Fair
Poor
N/A
4 3 2 1 X
4 3 2 1 X
4 3 2 1 X
4 3 2 1 X
Feet
Intermittent Ephemeral X Perennial X N/A
Bedrock Boulders X Riprap Gravel
Sand X Silt/Clay Concrete X N/A
Possible Ecosystem Services: (Circle Two Most Significant)
Other Comments, including wildlife species seen:
Site does support a small mammal population (E. cottontail, voles, prairie dogs) and predator population (coyotes, raptors)
20%
18%
Canada thistle, Russian olive
Frozen, unable to determine
No, limited connectivity, close to I-25
W. wheatgrass
Showy milkweed
Coyote willow
Cottonwood Sib. Elm
Erosion Control Water purification Flood attenuation Soil Fertility/Formation Pollination Infiltration
Primary production Nutrient Cycling Local climate regulation Recreation Aethetic experience
Wildlife Habitat Waste Reduction/Detoxification
Pollinators
Grass
Forb
Shrub
Tree
Total Vegetation Dominant Species
Cover by Strata 1
E. Direct Human Impacts
F: Indirect Human Impacts
Appendix B
Photographs
Plate 1: Southeast corner, looking west
Plate 2: Southern edge, looking south
Plate 3: Western edge, looking northwest, view of Boxelder Creek and trail
Plate 4: Southern edge, looking north
Plate 5: Detention Basin
Plate 6: Detention Basin Channel
Plate 7: Corn stubble
Plate 8: Mature trees in drainage ditch
Plate 9: Prairie dogs on western edge
Plate 10: Sample 1
Plate 11: Sample 1 Soil Profile
Plate 12: Sample 2
Plate 13: Sample 2 Soil Profile
Plate 14: Sample 3
Plate 15: Sample 3 Soil Profile
Plate 16: Sample 4
Plate 17: Sample 4 Soil Profile
Plate 18: Sample 5
Plate 19: Sample 5 Soil Profile
MAINTENANCE
QUALITATIVE
PARAMETERS
3
I. Annual / Invasive Weed
Population Description
4 3
J. Ground Disturbance 4 3
M. Root Density (Percent)
22
N. Surface Protection (Percent)
O. Bank Angle (Degrees)
L. Root Depth (Feet)
Q. Flow Regime
R. Bank Material (Type)
P. Bank Height
Total Score
1
B. Wildlife Habitat
C. Overall Aesthetic
D. Ecological Connectivity
Sustainability
B1. Prairie Dog Habitat
B2. Species of Concern
A. Biodiversity
A2. Habitat Diversity
A1. Plant Diversity
LANDSCAPE TYPOLOGY FIELD DATA SHEET
Noxious Weeds
COMMENTS
%
%
%
%
Landscape Description: Small perennial stream, some riparian forest patches, some riparian shrub patches, some emergent vegetation
GENERAL
QUALITATIVE
PARAMETERS
Habitat Subtype: Forested and
herbaceous
Park/Open Space: Boxelder Creek to Date: 12/18/18
west of Site
Typology: Natural riparian corridor
STREAM
CHARACTERISTICS
(Stream Areas Only)
1 X
G. Noxious Weed Population
Description
4
X
H. Visual Water Quality (excluding
upland typologies)
4 3
2 1
K. Opportunities for Restoration
(Describe in comments)
Y / N
Hydrologic System (riparian & surface
water types): Perennial
Observer: S. Benton Sample ID: NA
1
X
X
2
2
2 1
60%
5%
Slender wheat
4 3
2 1
K. Opportunities for Restoration
(Describe in comments)
Y / N
A. Biodiversity
A2. Habitat Diversity
A1. Plant Diversity
LANDSCAPE TYPOLOGY FIELD DATA SHEET
Noxious Weeds
COMMENTS
%
%
5%
%
Landscape Description: Level field, previously disturbed, retention basin in SE corner
GENERAL
QUALITATIVE
PARAMETERS
Habitat Subtype: NA
Park/Open Space: Within Site Date: 12/18/18
boundaries
Typology: Former agricultural field,
disturbed area
B. Wildlife Habitat
C. Overall Aesthetic
D. Ecological Connectivity
Sustainability
B1. Prairie Dog Habitat
B2. Species of Concern
M. Root Density (Percent)
16
N. Surface Protection (Percent)
O. Bank Angle (Degrees)
L. Root Depth (Feet)
Q. Flow Regime
R. Bank Material (Type)
P. Bank Height
Total Score
NA
I. Annual / Invasive Weed
Population Description
4 3
J. Ground Disturbance 4 3
Erosion Control Water purification Flood attenuation Soil Fertility/Formation Pollination Infiltration
Primary production Nutrient Cycling Local climate regulation Recreation Aethetic experience
Wildlife Habitat Waste Reduction/Detoxification
Pollinators
Grass
Forb
Shrub
Tree
Total Vegetation Dominant Species
Cover by Strata 1
E. Direct Human Impacts
F: Indirect Human Impacts
MAINTENANCE
QUALITATIVE
PARAMETERS
3
Smooth brome
W. tansymustard
Rubber rabbit
Canada thistle, cheatgrass, nodding plumeless thistle, field bindweed
No, to be developed
Bank Angle (Ratio)
Flow Regime
Bank Material (Type)
Classification of streams based on parameters such as magnitude, frequency, duration,
timing, and rate of change of flow. Identify flow regime as either perennial, ephemeral, or
intermittent.
100 to 80 percent of the stream bank is occupied by protective materials
Slope is between 2:1 and 1:1 (27 degrees to 45 degrees)
Slope is between 4:1 and 2:1 (14 degrees to 27 degrees)
Root Depth (Feet)
Less than 14 percent of the stream bank is occupied by roots of riparian vegetation
15 to 54 percent of the stream bank is occupied by roots of riparian vegetation
55 to 79 percent of the stream bank is occupied by roots of riparian vegetation
100 to 80 percent of the stream bank is occupied by roots of riparian vegetation
Channel completely lined with cement
Fine soils
Course well drained soil
Fine to course aggregate up to 1 inch in diameter
Course aggregate with angular shapes
Large rounded stones
Naturally occurring solid rock foundation
Typically shallow; Normally dry with brief periods of flow in response to rainfall
Water flowing seasonally (wet season); Normally dry during summer
Slope is greater than or equal to 1:1 (45 degree angle) or is a cut slope
Slope gradient is less than or equal to 4:1 (14 degree angle)
Bank Height
Represents the difference between the upper limit of the stream bank and the toe (start of
the bank) at bankfull. The top of the stream bank is generally the upper level of riparian
vegetation. The start of the bank may be below waterline.
Feet (actual) Choose an area that appears representative of the segment of stream being assessed. Determine the upper limit
of the stream bank and measure the vertical distance to bankfull, in feet.
water treatment plants, etc.
Views are impacted by human activites. Noises are elevated.
No noxious weeds present.
The site is composed of greater than 20% noxious weeds.
The site is composed of less than 5% noxious weeds.
The site is composed of between 5% and 20% noxious weeds.
Direct Human Impacts
The landscape contains few trampled vegetated areas showing no clear unauthorized trails, small amounts of trash scattered around the receptacles from passive littering, and little to
no evidence of
vandalism. Evidence of user degradation is less than 10% of the landscape.
Many indications of surrounding land uses impacting ecological connectivity or functions, including oil & gas well pads, active agriculture fields, confined feed lot opertations, water
treatment plants, etc.
View-shed is significantly affected. Noises are present and may be high at times.
The landscape contains extensive user degradation including many unauthorized trails and parking areas, exposed bare ground, high amounts of trash scattered throughout the landscape
from both active
and passive littering, and extensive evidence of vandalism. Evidence of user degradation is greater than 30% of the landscape.
Not applicable
Low quality landscape features with high need for improvements and maintenance requirements.
Ground Disturbance
0-10 percent bareground
11-25 percent bareground
26-50 percent bareground
51-100 percent bareground
Not applicable
The site is composed of greater than 50% annual or invasive weeds.
Not applicable
High quality landscape features with limited need for improvement or changes to maintenance required.
Medium quality landscape features with moderate need for improvements and maintenance requirements.
Total Score
No annual or invasive weeds present.
The site is composed of less than 25% annual or invasive weeds.
Poor water clarity characterized with high levels of suspended solids, increased presence of algal blooms, no riparian buffer, no hydraulic flow, and high volume of trash and/or debris.
Not applicable
specific habitat
type.
Landscape contains a monoculture of either a native or nonnative species.
Landscape is integrated into the surrounding spaces and neighborhood. The landscape contains visually appealing structural and landscape diversity and complexity associated with topography,
scenic
views, and vegetation (trees, shrubs, planting beds and ground cover). If occurring, park facilities complement the overall design of the landscape.
Landscape is integrated into the surrounding spaces and neighborhood. The landscape contains some structural and landscape diversity and complexity; however, the landscape is lacking
visually appealing
scenic views and vegetation. If occurring, park facilities complement the overall design of the landscape.
Landscape is not integrated into the surrounding spaces and neighborhood. The landscape is lacking adequate structural and landscape diversity and complexity. Some planting beds and
trees are present.
If occurring, the park facilities do not complement the overall design of the landscape.
Landscape is not integrated into the surrounding spaces and neighborhood. The landscape does not contain visually appealing structural and landscape diversity and complexity associated
with topography
and vegetation (trees, shrubs, planting beds and ground cover). Scenic views are unavailable to users. If occurring, the park facilities do not complement the overall design of the landscape.
Ecological Connectivity
The park is highly connected to other elements of the larger park system and/or is in close proximity to trails; presence of outfalls or confluences in riparian or open water systems;
similar park features
(i.e. trees, shrubs, open water areas); and/or there is a general absence of barriers such as walls, roads, large urbanized areas, and dams.
Landscape contains intermediate levels of species richness and evenness relative for that specific habitat type.
Landscape contains low levels of species richness and evenness relative for that specific habitat type.
Not applicable
Not applicable
The park is somewhat connected to other elements of the larger park system and/or has minimal proximity to trails; similar park features (i.e. trees, shrubs, open water areas); and/or
there are moderate
barriers such as walls, roads, large urbanized areas, and dams. May lack presence of outfalls or confluences in riparian or open water systems.
The park is moderately connected to other elements of the larger park system and/or is in relative proximity to trails; similar park features (i.e. trees, shrubs, open water areas);
and/or there is a relative
absence of barriers such as walls, roads, large urbanized areas, and dams. May have presence of outfalls or confluences in riparian or open water systems.
E
The species is limited to eroded soil outcrops composed of
barren exposures of the Coalmont Formation, a coal-
bearing substrate in North Park CO.
No No Effect
No No Effect
Stoneflies are primarily associated with clean, cool,
running waters.
C
No No Effect
Moist boreal/subalpine forests in the W. US with cold,
snowy winters and a high-density snowshoe hare prey
base.
T
No No Effect
Nesting/roosting habitat typically occurs either in well-
structured forests with high canopy cover, large trees, and
other late seral characteristics, or in steep and narrow
rocky canyons formed by parallel cliffs with numerous
caves and/or ledges within specific geological formations.
T
No No Effect
Lush vegetation along watercourses or herbaceous
understories in wooded areas near water.
T
PT
Deep, persistent, and reliable snow cover. No No Effect
E
Wetlands, inland marshes, lakes, ponds, wet meadows
and rivers, and agricultural fields.
No water
depletion
No Effect
No Effect
No water
depletion
Sandy beaches, sandflats, dredge islands, and drained
river floodplains.
T
No water
depletion
Tall grass prairie on unplowed, calcareous prairies, and
sedge meadows. Upstream depletions to the Platte River
system in Wyoming may affect the species in NE.
T
No Effect
No water
depletion
Large, free-flowing, warm-water, and turbid rivers with a
diverse assemblage of physical habitats.
E
2The bald eagle was removed from the fedarl list of T&E species in 2007, but it continues to enjoy protection under the Migratory Bird Treaty Act (MBTA)and Bald
and Golden Eagle Portection Act (BGEPA).
Sparsely vegetated sandbars on large rivers and
sand/gravel pits.
No Effect
No water
depletion
E
No Effect