Attachment F - Ecological Report

Regular Meeting, February 19, 2026 · item 5A: Consideration of the following items related to a petition for an annexation of approximately 24.04 acres of land located at 5399 Kewanee Dr… · 31 pages

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ECOLOGICAL REPORT for the HOGAN PANCOST PROPERTY in BOULDER COUNTY, COLORADO

Prepared for: Tina Dalton City of Boulder Parks and Recreation Department 3198 Broadway Boulder, CO 80304

Prepared by: Professional Wetlands Consulting, Inc. 20 Rim Road Boulder, CO 80302 303 444-1715

September 29, 2025

Introduction This Ecological Report documents the environmental characteristics of the Hogan Pancost property off 55th Street by the East Boulder Recreation Center. The land is proposed for annexation into the City of Boulder. The Hogan Pancost site development will conform to the guidelines established in the City of Boulder Parks and Recreation Department Plan approved by City Council in 2022.

Methods Field review and analysis of the site was completed in November of 2024. Background and data review was conducted to gather existing information and assist in the evaluation of sensitive and natural biological resources within the project. The data review included an evaluation of online resources, review of agency publications, and coordination with agency staff to determine the presence or potential occurrence of sensitive natural and biological resources. Background review for the Hogan Pancost property included: · USFWS Federally Listed and Proposed Endangered, Threatened, and Candidate Species and Critical Habitat in Boulder County as identified by the USFWS Information, Planning, and Conservation System (IPaC) Official Species List and Critical Habitat Mapper; · Colorado Parks and Wildlife Threatened and Endangered List including USFWS and Colorado State Threatened, Endangered, and species of Special Concern; · Review of Natural Resources Conservation Service (NRCS) soils and ecological site data to identify soils and habitats in the vicinity capable of supporting sensitive or specially valued species; · Review of the USFWS National Wetlands Inventory (NWI) Wetlands Mapper for the occurrence of known or suspected U.S. Army Corps of Engineers jurisdictional wetlands and waterbodies; · Review of soils surveys and U.S. Department of Agriculture, Natural Resources Conservation Service National List of Hydric Soils to aid in the determination for the presence of wetlands; · The Boulder County Comprehensive Plan and the associated maps for environmental areas, wildlife, migration corridors, biodiversity, rare plant habitats, and significant natural areas were reviewed. Current and historical aerial photography was also reviewed and analyzed; · Field review of the property was conducted by David Steinmann with Professional Wetlands Consulting (PWC). The field work included walking the project area to identify wetlands, look for Threatened & Endangered Species habitat, look for avian roosting and nesting sites, document general wildlife habitat, record vegetation, and document environmentally sensitive features. · Wetlands were delineated following the Corps of Engineers Wetlands Delineation Manual (1987) and the Great Plains Regional Supplement. Wetlands were surveyed by a licensed surveyor. 1

Site Description The Hogan Pancost property is off 55th Street at an abandoned agricultural meadow that was historically plains grasslands and part of the South Boulder Creek floodplain. The site is bounded by roads, residential development, soccer fields, and undeveloped land. Irrigation ditches border the north, south, and west property boundaries. The primary use of the land has been agriculture and grazing. Habitat quality is higher on the portion of the site east of 55th and lower to the west of 55th. The Hogan Pancost property is located on both sides of 55th Street to the south of the East Boulder Recreation Center in Sections 3 and 4 in Township 1 South, Range 70 West in Boulder County, Colorado. A Site Inventory Map showing the wetlands on the land west of 55th Street is provided as Figure 1. Photographs of the property and of the wetlands are on Figures 5 - 11. The Land Survey Plat illustrating the surveyed wetlands boundaries on the entire property is also attached.

Wetlands There are wet meadow wetlands, emergent wetlands, and willow shrub wetlands at the site. The wetlands are dominated by cattails, sedges, and rushes with a few small patches of sandbar willow shrubs. There were significantly more wetlands in the fall of 2024 than there were at any time in the past 32 years due to recent flood irrigation from the ditch lateral along the south edge of the site. Flood irrigation is no longer occurring and the cuts in the ditch lateral are being patched to prevent further flood irrigation. Some ditch seepage will continue to occur and support the wetlands close to the ditches such as the wetlands present in 2016 and shown on Figure 3. Data forms are attached. Dominant wetlands vegetation at the Hogan Pancost property includes cattails (Typha latifolia), baltic rushes (Juncus balticus), sedges (Carex species), three-square (Schoenoplectus americanus), and foxtail barley (Hordeum jubatum). The wetlands were historically impacted by heavy grazing; now there are large number of non-native weedy plants at the site. The wetlands were closely and systematically examined for rare and sensitive plant species numerous times prior the City of Boulder purchasing the property, as well as in the fall of 2024. Surveys for the Ute Ladies’ Tresses Orchid were completed in July and August many times from 1992-2016 following US Fish and Wildlife protocols. Plant species diversity is low within the delineated wetlands with no rare or sensitive plants. Hydric soils are present in the wetlands, with soil colors corresponding to 10yr 3/2, and 10yr 2/2 on the Munsell Soil Color Charts. Redoxymorphic features are present in the wetland soils, and soil texture is sandy loam with gravel and cobbles. The sources of wetlands hydrology are flood irrigation, irrigation ditch seepage, and groundwater with inputs from rain, snowmelt, and runoff. Wetlands on the Hogan Pancost property are classified as Palustrine, Emergent Wetlands. Functions and values of the wetlands include within basin food chain support, flood storage, wildlife habitat, passive recreation, long term nutrient retention, and short term nutrient retention. 2

The Wetland Functional Evaluation forms for the Hogan Pancost site was based upon the Functional Assessment Evaluation - Ranking Rationale from the City’s 2004 wetlands remapping project, and upon the Advanced Identification of Wetlands in the City of Boulder Comprehensive Planning Area from May 1988. The wetlands on the south side are high-functioning with a 50' wide buffer and the cattail wetlands on the north side of the site low-functioning with a 25' wide buffer zone (Figure 1). The Super-Phostical Lateral wetland located along the north edge of the property is adjacent to a small regulated wetland area that is already mapped as a wetland by the City of Boulder (City Wetland # 40901), located on City land to the north of the subject property. The Wetland Functional Evaluation Form for this wetlands and the nearby ponds is also attached. Current Wetlands Boundaries: The site has 7.37 acres of wetland supported by flood irrigation and seepage from the surrounding irrigation ditches. The wetlands boundaries were delineated with sequentially numbered pink flags and surveyed by Flatirons Surveying as shown on Figure 1 and on the Land Survey Plat. City of Boulder wetlands mapping for the surrounding area is on Figure 13. There are currently more wetlands than in prior years due to flood irrigation from the south lateral. In 2016 there were approximately 2 acres of wetlands, while in 2024 there were 7.37 acres of wetlands. There was 5.4 acres more newly created wetland in 2024 than in 2016 because of flood irrigation that covered more of the site than in previous years. The wetlands are one hundred percent created by water from the irrigation ditches, with hydrological support for the wetlands from a combination of flood irrigation and sub-surface ditch seepage. The wetlands are topographically lower than the irrigation ditches. The ditches were not flowing at the time of the 2024 field survey. 1992-2016 Wetlands Boundaries: David Steinmann with Professional Wetlands Consulting, Inc. has been working at the Hogan Pancost property since 1992, and the extent of the wetlands at the site has been observed to be directly dependent upon the amount of irrigation water being applied to the land. The field visits over the past 32 years were conducted throughout the calendar year, with most of the site visits being conducted during the spring, summer, and fall. Historically, the land was flood irrigated with water from the lateral ditch to the south which has been the main source of hydrology for the wetlands the west of 55th Street. Flood irrigation water was not applied to the land most years between 2000 and 2016 by the previous owners, after which flood irrigation began to occur again once the City of Boulder purchased the property. Sub-surface water seepage also supports the wetlands with water seeping from the lateral ditch to the south, Dry Creek Ditch #2 to the west, and from the Super-Phosticle Ditch to the north. The wetlands map on Figure 3 from 2016 shows far less wetlands on the site in 2016 than there were in the fall of 2024. No flood irrigation was being applied to the land in 2016 when the wetlands were much smaller and being supported by sub-surface ditch seepage. An area must have hydrophytic vegetation, hydric soils, and hydrology to qualify as a wetlands. Without flood irrigation the northern cattail wetlands mapped in 2024 should dry up due to a lack of hydrology because these wetlands are 100% supported by irrigation water. The wetlands near the south and west boundaries of the site will likely remain wetlands. 3

Anticipated 2026 Wetlands Boundaries: It is anticipated that the majority of the wetlands will dry up and revert back to uplands now that the flood irrigation has ceased. The wetlands should recede at least to the boundary shown in red on Figure 2, if not further south, similar to the 2016 wetlands on Figure 3. An updated wetlands delineation will be completed in 2026 now that flood irrigation has ceased so the wetlands boundaries can be re-mapped when the land is not being flood irrigated. US Army Corps of Engineers and Section 404 Wetlands Regulations: The wetlands on the Hogan Pancost site are isolated and are considered non-jurisdictional by the US Army Corps of Engineers. There is no surface wetlands/waters connection between the Hogan Pancost wetlands and navigable waters. A Section 404 Permit from the US Army Corps of Engineers will not be needed for the Hogan Pancost site development and tennis court project. State of Colorado Wetlands Regulations: The wetlands on the site are regulated by the State of Colorado and subject to the new State of Colorado wetlands regulations. City of Boulder Wetlands Regulations: A City of Boulder Wetlands Permit would be needed if there are proposed impacts to wetlands or the regulated wetlands buffer zones.

Noxious Weeds The area west of 55th Street is very overgrown with non-native noxious weeds including teasel (Dipsacus sylvestris), Russian olive trees (Elaeagnus angustifolia), Canada thistle (Cirsium arvense) and trefoil (Lotus corniculatus). Noxious weed control following the City of Boulder’s Integrated Pest Management (IPM) guidelines and regulations is strongly recommended. The Common Teasel Identification and Management fact sheet is attached.

Wildlife 55th Street divides the site with higher quality habitat east of 55th Street, with the land west of 55th having lower quality habitat with numerous noxious weeds. The wildlife habitat quality is moderate/medium at the property and on the land to the west of 55th Street. Wildlife such as deer, foxes, coyotes, rodents, bobcats, raccoons, raptors, songbirds, and small mammals utilize the property. The infestation of noxious weeds has diminished the wildlife habitat. A small area of abandoned prairie dog burrows is present in the north-central part of the site. Prairie dogs were not observed at the site when it was examined for prairie dogs 8 different times over the past 6 months. The old burrows are collapsing and there are no signs of prairie dog scat or vegetation grazing. The prairie dog burrow area is approximately ½ acre. Photos of the abandoned prairie dog burrows are on Figure 12. No prairie dogs are currently living on the Hogan Pancost site. Mammals such as the eastern cottontail rabbit (Sylvilagus floridanus), mice, voles, foxes, racoons, coyotes, and deer likely utilize the Hogan Pancost project area during all seasons. Common reptiles such as garter snakes (Thamnophis sirtalis), bull snakes, and lizards also utilize the site. 4

Wildlife values are low to moderate and include feeding, watering and cover. Bats utilize the area for nighttime feeding. The wildlife observed were whitetail deer, rabbits, a kestrel falcon, and a bobcat. Seasonal and/or year-round use can be expected by a number of birds including American robins (Turdus migratorius), mourning doves (Zenaidura macroura), magpies (Pica pica), swallows, crows (Corvus brachyrhynchos), chickadees, juncos, sparrows, and ravens (Corvus corax). No raptor nests were observed at the site. Raptors utilize the site for hunting rabbits, rodents, birds and small animals. No waterfowl were observed in the wetlands, though geese use the site for feeding. Some Wildlife Species of Special Concern listed by Boulder County likely use the property east 55th Street where there are less noxious weeds and connectivity to the South Boulder Creek corridor. The list of Boulder County Species of Special Concern from 2013 is attached. The northern leopard frog is known to occur in nearby wetlands east of 55t Street and is likely along the irrigation ditches on the edges of the Hogan Pancost property. The northern leopard frog may also utilize the wet meadow wetlands on the south side of the site.

Threatened & Endangered Species The USFWS Information, Planning and Conservation System (IPAC) was accessed to determine T&E species that could be impacted by development at the site in Boulder County. Species include the Preble’s meadow jumping mouse (Zapus hudsonius preblei), Ute lady’s tresses orchid (Spiranthes diluvialis), prairie fringed orchid (Platanthera praeclara), piping plover (Charadrius melodus), whooping crane (Grus americana), and pallid sturgeon (Scaphirhynchus albus). The site was closely examined for potential habitat for the above listed species plus direct or indirect impacts. Critical habitat for the Preble’s Meadow Jumping Mouse occurs on the eastern part of the property east of 55th Street, as shown on the attached critical habitat map (Figure 4). The land west of 55th Street does not provide critical habitat for the mouse of any other sensitive species. The critical mouse habitat is not affected by the project. Typical habitat for PMJM is composed of welldeveloped willow/ riparian vegetation with undisturbed grassland communities and a water source. The tricolored bat is proposed for listing by the US Fish and Wildlife Service as an Endangered Species. Buildings on the property were examined for signs of hibernating or roosting bats in the fall of 2024, and no evidence of bats such as guano or small scratches on the ceilings was observed. It is unlikely that bats would hibernate at the site. The buildings and trees should be examined for roosting bats, especially tricolored bats, and for any physical signs of bats before being removed. No known occupied habitat or potential habitat occurs at the Hogan Pancost site for the Ute ladies’ tresses orchid or the prairie fringed orchid. The property was closely examined for the Ute ladies’ tresses orchid many times in previous years and the species was not found. The Hogan Pancost development is not anticipated to adversely impact any listed Threatened & Endangered species that could occur in Boulder County. All proposed site development is situated west of 55th Street. The land east of 55th Street with the critical mouse habitat will be preserved and protected as Open Space. 5

Physical Linkages to Natural Areas, Parks or Open Space The Hogan Pancost site is adjacent to City of Boulder Open Space on the east side, as well as City of Boulder Parks and Recreation Natural Lands that have the best habitat quality of any of their sites, and the most state and federal listed species. The property borders the East Boulder Recreation Center with existing soccer fields and tennis courts to the north of the site. The majority of the Hogan Pancost project site consists of abandoned agricultural fields dominated by non-native plants, with moderate wildlife habitat value often characteristic of agricultural land. The South Boulder Creek riparian corridor to the east of the site and east of 55th Street is a wildlife corridor that can be followed by mammals, birds, insects, butterflies, and pollinators. There is a physical link to the Open Space that currently borders the eastern property boundary of the site.

Existing Drainage Patterns The site does not contain any streams, creeks or intermittent/perennial drainageways. The Hogan Pancost land is an agricultural meadow with several small historical drainage swales that are visible in the field and on aerial photography. Dry Creek Ditch #2 conveys water along the western property boundary. The site is situated within the South Boulder Creek watershed which flows into Boulder Creek. Figure 1 shows the 100 year floodplain and the 500 year floodplain limits.

Aquifer Recharge and Discharge Areas There are no aquifer recharge or discharge areas on the property. There are no springs or seeps.

Mitigation Opportunities If the proposed site development impacts City of Boulder regulated wetlands or the regulated wetlands buffer zone, then a City of Boulder Wetlands Permit and onsite mitigation would be required. It is anticipated that the northern wetland areas will dry up and revert to upland now that flood irrigation has stopped, such that the project should be able to avoid direct impacts to wetlands and most of the wetlands buffer zone. The proposed site plans will impact areas dominated by nonnative vegetation with some impacts to native vegetation. If necessary, there are onsite wetlands and buffer zone mitigation opportunities. Due to the large area of land currently vegetated with non-native species and because much of the site will remain undisturbed, there are good mitigation opportunities on the property for establishing new native plant habitats and vegetation communities.

Potential mitigation and restoration opportunities at the Hogan Pancost site include: · Restoration of native grasslands by removing and controlling non-native plants. Native plant communities could be reestablished by seeding and planting species native to Boulder County. · A higher-quality wetlands buffer zone could be created by planting native trees and shrubs to provide shade, cover, and food sources to improve wildlife habitat. · Creating new wetlands, detention ponds, and grass-lined swales to filter stormwater runoff, sediment, and nutrients. · Visual screening by planting native trees between the new facilities and the undisturbed natural areas at the site, and to screen the existing residential development.

References Boulder County Comprehensive Plan. July 15, 2020 Environmental Resources Element Boulder County Comprehensive Plan Maps: Critical Wildlife Migration Corridors, Environmental Conservation Areas, High Biodiversity Areas, Habitat Conservation Areas for the Prebel’s Meadow Jumping Mouse, Rare Plants Areas and Significant Natural Areas. Boulder County Wildlife Species of Special Concern Colorado Parks and Wildlife. Colorado Threatened and Endangered List. Available at http://cpw.state.co.us/learn/Pages/SOC-ThreatenedEndangeredList.aspx. Colorado Natural Heritage Program (CNHP). CNHP Conservation Status Handbook (Tracking List), Statewide species and natural community tracking list for Boulder County, Colorado. Available online at: http://www.cnhp.colostate.edu/download/list.asp. United States Army Corps of Engineers (USACE). 1987. Corps of Engineers Wetlands Delineation Manual, U.S. Army Engineer Waterways Experiment Station, Vicksburg, MS. USACE. 2010. Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Great Plain Region (Version 2.0). U.S. Army Corps of Engineers Engineer Research and Development Center. Vicksburg, MS.\ United States Department of Agriculture, Natural Resources Conservation Service (NRCS). 2014. National List of Hydric Soils, http://www.nrcs.usda.gov/wps/portal/nrcs/main/soils/use/hydric/. United States Department of Agriculture, Natural Resources Conservation Service (NRCS). 2015. Web Soil Survey. Available at http://websoilsurvey.sc.egov.usda.gov/App/HomePage.htm United States Department of the Interior, United States Fish and Wildlife Service (USFWS). 2014. National Wetlands Inventory (NWI) Map. Available at http://www.fws.gov/wetlands/data/mapper. USFWS. Critical Habitat Online Portal. Available at: http://ecos.fws.gov/crithab/. USFWS. Information, Planning, and Conservation System (IPaC) USFWS Listed Species occurring within vicinity of Project. Available online at http://ecos.fws.gov/ipac/.

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Figure 4.

Critical Habitat

Figure 5. Hogan Pancost property looking west from the northeast corner (top), and looking southeast from the northwest corner, showing the noxious weed infestation of teasel.

Figure 6. Hogan Pancost looking west from 55th Street (top), and looking east from the southwest corner showing the sedge/rush wetlands.

Figure 7. Cattail wetlands looking south from the north side of the property (top), and sedge/rush wetlands looking northwest from the southern property boundary.

Figure 8. Hogan Pancost property looking southwest at the southwest corner (top), and looking northeast towards from the southwest corner.

Figure 9. Hogan Pancost looking northwest along the north property line at the wetlands associated with the irrigation ditch, and the parcel east of 55th Street from the east property line.

Figure 10. Looking south at two of the places where the irrigation lateral was cut to flood irrigate the Hogan Pancost property which then created large areas of wetlands and noxious weeds.

Figure 11. Irrigation ditch and associated wetlands at Hogan Pancost on the southeast side of 55th Street, and the shallow open water pond on the north edge of the site south of 55th Street.

Figure 12. Prairie dog burrows at the Hogan Pancost property on the north/middle part of the site.

Figure 13. City of Boulder Mapped Wetlands

Wetland Evaluation

STR: S 3&4, T1S, R70W

Investigator: David Steinmann

Date of Visit: 11/20/2024

Obs. Method: Onsite

General Location: South of the East Boulder Recreation Center next to 55th Street. Referred to as the Hogan Pancost Property. Description: This evaluation covers the emergent cattail wetlands within a topographically low drainage swale on the north part of the site west of 55th Street. The property is an open field that was previously heavily grazed with cattle and horses on the land. The majority of the land site is vegetated with non-native noxious weeds. The dominant wetlands vegetation in the low-functioning wetlands is cattails. Plains cottonwood trees, willow trees, ash trees, Russian olive trees, and willows grow at the site. Wetland Origin: Irrigation

Primary Water Source: Irrigation Ditch Flows and Seepage

Hydro-period: Seasonal

Max Water Depth: (ft): <1

Major Plant Communities Present: Cattails, Sedges, and Rushes

% of Wetland Area 100 %

% Vegetated: 92 % Bare ground: 8 % Water: 0.01

FUNCTION AND VALUE ASSESSMENT Ratings: 5 = very high, 4 = high, 3 = medium, 2 = low, 1 = no Confidence in rating: c = high, b = medium, a = low Groundwater Recharge

There is minor groundwater recharge after heavy rains and during snowmelt when water collects in the low spots and drainage swales where it can infiltrate into the ground.

Groundwater Discharge

There is no evidence of groundwater discharge because there are no seeps, springs, or streams on the site.

Flood Storage/Alteration

The site can store minor amounts of floodwater after heavy rains.

Shoreline Anchoring

No shorelines occur at the property.

Sediment Trapping/

There is modest sediment trapping during heavy rains.

Nutrient Retention (short-term)

Short term nutrient retention is expected in the drainage swales and within the areas of dense wetlands vegetation.

Nutrient Retention

Long-term woody debris accumulation was observed, with emergent wetlands and lush vegetation being able to trap and retain nutrients.

Food Chain Support (export)

There are no streams to export food chain support from the site.

Food Chain Support (within basin)

Vegetation, berries, rodents, and invertebrates provide food chain support.

Fish Habitat/Aquatic Diversity

There is no fish habitat or aquatic diversity due to the lack of streams.

Wildlife Habitat

Trees, shrubs, grasses, and flowers provide food and habitat for birds and wildlife such as deer, rodents, canines, raptors, songbirds and prairie dogs.

Active Recreation

Recreational use is currently non-existent. The area is fenced.

Passive Recreation/ Heritage Value

The site may be used for photography and to passively observe wildlife. There no heritage value to the wetlands.

Comments: The wetlands are isolated and are hydrologically supported by irrigation ditch seepage from the irrigation ditches that flow across the site. Wetland boundaries are defined by vegetation, soils, and topography. Noxious weeds are prevalent.

Wetland Evaluation

STR: S 3&4, T1S, R70W

Investigator: David Steinmann

Date of Visit: 11/20/2024

Obs. Method: Onsite

General Location: South of the East Boulder Recreation Center next to 55th Street. Referred to as the Hogan Pancost Property. Description: This evaluation covers the wet meadow wetlands on the south side of the property west of 55th Street, wetlands within several topographically low drainage swales on the west side, and wetlands adjacent to the active irrigation ditches associated with the property. The site is an open field that was previously heavily grazed with cattle and horses on the land. The majority of the site is vegetated with non-native noxious weeds. The dominant wetlands vegetation is sedges and cattails. Cottonwood trees, willow trees, ash trees, Russian olive trees, and shrubs are present. The Northern Leopard Frog may utilize these wetlands. Wetland Origin: Irrigation

Primary Water Source: Irrigation Ditch Flows and Seepage

Hydro-period: Seasonal

Max Water Depth: (ft): <1

Major Plant Communities Present: Cattails, Sedges, and Rushes

% of Wetland Area 100 %

% Vegetated: 92 % Bare ground: 8 % Water: 0.01

FUNCTION AND VALUE ASSESSMENT Ratings: 5 = very high, 4 = high, 3 = medium, 2 = low, 1 = no Confidence in rating: c = high, b = medium, a = low Groundwater Recharge

There is minor groundwater recharge after heavy rains and during snowmelt when water collects in the low spots and drainage swales where it can infiltrate into the ground.

Groundwater Discharge

There is no evidence of groundwater discharge because there are no seeps, springs, or streams on the site.

Flood Storage/Alteration

The site can store minor amounts of floodwater after heavy rains.

Shoreline Anchoring

No shorelines occur at the property.

Sediment Trapping/

There is modest sediment trapping during heavy rains.

Nutrient Retention (short-term)

Short term nutrient retention is expected in the drainage swales and within the areas of dense wetlands vegetation.

Nutrient Retention

Long-term woody debris accumulation was observed, with emergent wetlands and lush vegetation being able to trap and retain nutrients.

Food Chain Support (export)

There are no streams to export food chain support from the site.

Food Chain Support (within basin)

Vegetation, berries, rodents, and invertebrates provide food chain support.

Fish Habitat/Aquatic Diversity

There is no fish habitat or aquatic diversity due to the lack of streams.

Wildlife Habitat

Trees, shrubs, grasses, and flowers provide habitat for birds and wildlife such as deer, rodents, canines, raptors and songbirds. The Northern Leopard Frog may occur in the wet meadow wetlands and along the adjacent irrigation ditches.

Active Recreation

Recreational use is currently non-existent. The area is fenced.

Passive Recreation/ Heritage Value

The site may be used for photography and to passively observe wildlife. There no heritage value to the wetlands.

Wetland Evaluation

Wetland #: 40901

Former #: 15 (in part)

Investigator:

Date of Visit:

Obs. Method: Onsite

A. Carpenter, C. Browne

General Location:

6/2/2004

T_R_S: T1SR70WS3

Ponds immediately south of East Boulder Recreation Center

Description: Two constructed ponds that encompass nearly 6 acres.

Wetland Origin: Urban/ industrial

Primary Water Source:

Hydroperiod:

Max WaterDepth (ft):

Permanently flooded

Major plant communities present plains cottonwood / mixed graminoid cattail wooly sedge / mixed graminoid mixed graminoid open water

Urban / industrial runoff

% of wetland area 2 1 1 1 95

FUNCTION AND VALUE ASSESSMENT Ratings: 5 = very high, 4 = high, 3 = medium, 2 = low, 1 = no

% Vegetated: 1 % Bare ground: 0 % Water: 99

Confidence in rating: c = high, b = medium, a = low

Groundwater Recharge

Groundwater Discharge

Flood Storage / Floodflow Alteration

Shoreline Anchor. / Stabilization

Sediment Trapping / Retention

Nutrient Retention (long-term)

Nutrient Retention (short-term)

Food Chain Support (export)

low opportunity due to controls

Food Chain Support (within basin)

mowed to edges

Fish Habitat / Aquatic Diversity

Wildlife Habitat

geese, but human activity and dogs probably reduce effectiveness of area for wildlife

Active Recreation

Frequent use of ponds in dog park area

Passive Rec / Heritage Value

Rec. center visitors

Comments:

margins partially manicured (with some unmaintained areas) resident Canada goose population

Criteria for Designating Wildlife Species of Special Concern Boulder County maintains a Species of Special Concern (SSC) List for the purpose of conserving and preserving wildlife species and their habitat in the county. A species must meet one of the following criteria to be incorporated into the List: 1. Species with Federal status (listed or proposed threatened or endangered, candidates for listing, or under review for listing) or State status (threatened or endangered); 2. Species considered to be sensitive that appear on the following lists: Colorado Parks & Wildlife − Species of Concern, U.S. Forest Service Region 2 − Sensitive Species, U.S. Bureau of Land Management − Sensitive Species, U.S Fish & Wildlife Service − Birds of Conservation Concern; 3. Species that have undergone a documented long-term noncyclical population decline, or whose abundance is critically low relative to their expected abundance in a given habitat type or quality; 4. Species occurring in Boulder County that are naturally rare 1; 5. Species that are dependent upon isolated or restricted2 habitat for at least a portion of their life cycle; 6. Species that have a disproportionately large effect on the structure and function of the ecosystem(s) they inhabit, and thus promote species diversity, ecosystem function and natural processes; 7. Extirpated species that historically occupied and are native to Boulder County; 8. Species of global or continental concern whose populations are stable in Boulder County (e.g. Colorado Natural Heritage Program - G1S4); 9. Species whose populations in the County may be currently secure, but are vulnerable to imminent threats affecting their populations either directly or indirectly3. 10. Species of undetermined status which require further research and/or monitoring. The Boulder County SSC list is a compilation of special status species identified by federal, state, and local governmental agencies, as well as non-governmental conservation organizations and conservation experts, as species that warrant protection in order to prevent the loss of habitat or populations. Species which are “naturally rare” normally occur in low abundance throughout their range. While their populations may be stable, species that are rare on the landscape are more vulnerable to extirpation or extinction compared to species with large populations.

“Isolated or restricted” habitat is definied as a descrete area that is distinguished from surrounding habitat by its unique features (biotic or abiotic). Such habitat is typically rare and patchily distributed on the landscape. Species that rely on “isolated or restricted” habitat are more vulnerable to extirpation than those that are widely distributed or are habitat generalists. 3

Direct threats to populations include loss of individuals from overexploitation or other means of direct mortality. Indirect threats include habitat degradation, competition with invasive species, increased prevalence of disease and pollution, and climate change.

Boulder County Wildlife Species of Special Concern

11/12/2013

Boulder County Species of Special Concern Species Name 1 Frog, Chorus Pseudacris triseriata 2 Frog, Northern Leopard Rana pipiens 3 Salamander, Tiger Ambystoma tigrinum 4 Toad, Boreal Anaxyrus boreas 5 Toad, Plains Spadefoot Spea bombifrons 6 Avocet, American Recurvirostra americana 7 Bittern, American Botaurus lentiginosus 8 Bittern, Least Ixobrychus exilis 9 Blackbird, Yellow-headed Xanthocephalus xanthocephalus 10 Bobolink Dolichonyx oryzivorus 11 Bunting, Indigo Passerina cyenea 12 Bunting, Lark Calamospiza melanocorys 13 Bunting, Lazuli Passerina amoena 14 Bushtit Psatlriparus minimus 15 Cormorant, Double-crested Phalacrocorax auritus 16 Crossbill, White-winged Loxia leucoptera 17 Dipper, American Cinclus mexicanus 18 Duck, Ring-necked Aythya collaris 19 Duck, Wood Aix sponsa 20 Eagle, Bald Haliaeetus leucocephalus 21 Eagle, Golden Aquila chrysaetos 22 Egret, Great Ardea alba 23 Falcon, Peregrine Falco peregrinus 24 Falcon, Prairie Falco mexicanus 25 Flicker, Northern Colaptes auratus 26 Flycatcher, Olive-sided Contopus cooperi 27 Flycatcher, Willow Empidonax traillii 28 Goshawk, Northern Accipter gentilis 29 Grebe, Eared Podiceps nigricollis 30 Harrier, Northern Circus cyaneus 31 Hawk, Ferruginous Buteo regalis 32 Hawk, Rough-legged Buteo lagopus 33 Heron, Black-crowned Night Nycticorax nycticorax 34 Heron, Great Blue Ardea herodias 35 Kingfisher, Belted Megaceryle alycon

Class Amphibian

Criteria 9

Imperiled

Amphibian

1,2

Amphibian

Bird

2,5

Bird

4,5

Bird

3,5

Bird

3,5

Bird

2,3

Bird

4,9

Bird

4,5

Bird

1,2,5

Bird

2,5

Bird

4,5

Bird

2,4,5

Bird

2,5

Bird

2,5

Bird

1,2,3,5

Bird

2,5

Bird

3,4

Bird

2,3,4,5

Bird

2,3,5

Bird

Species Name Kinglet, Golden-crowned Regulus satrapa 37 Lark, Horned Eremophila alpestris 38 Mockingbird, Northern Mimus polyglottos 39 Ovenbird Seiurus aurocapilla 40 Owl, Boreal Aegolius funereus 41 Owl, Burrowing Athene cunicularia 42 Owl, Flammulated Otus flammeolus 43 Owl, Long-eared Asio otus 44 Owl, Short-eared Asio flammeus 45 Pigeon, Band-tailed Patagioenas fasciata 46 Ptarmigan, White-tailed Lagopus leucura 47 Redstart, American Setophaga ruticilla 48 Rosy-Finch, Brown-capped Leucosticte austalis 49 Scrub-Jay, Western Aphelocoma californica 50 Shrike, Loggerhead Lanius ludovicianus 51 Siskin, Pine Spinus pinus 52 Sparrow, Brewer's Spizella breweri 53 Sparrow, Cassin's Peucaea cassinii 54 Sparrow, Fox Passerella iliaca 55 Sparrow, Grasshopper Ammodramus savannarum 56 Swallow, Bank Riparia riparia 57 Swift, Black Cypseloides niger 58 Thrasher, Sage Oreoscoptes montanus 59 Veery Catharus fuscescens 60 Vireo, Plumbeous Vireo plumbeus 61 Warbler, Virginia's Oreothlypis virginiae 62 Warbler, Wilson's Cardellina pusilla 63 Waxwing, Cedar Bombycilla cedrorum 64 Woodpecker, American Three-toed Picoides dorsalis 65 Woodpecker, Lewis's Melanerpes lewis 66 Woodpecker, Red-headed Melanerpes erythrocephalus 67 Wren, Rock Salpinctes obsoletus 68 Chub, Lake Couesius plumbeus 69 Darter, Iowa Etheostoma exile 70 Darter, Johnny Etheostoma nigrum 36

Class Bird

Criteria 5

Bird

4,5

Bird

2,5,10

Bird

1,2,3,5

Bird

2,5

Bird

2,4,5

Bird

2,5,9

Bird

2,5

Bird

2,3,5

Bird

2,3,5

Bird

2,3

Bird

2,3,5

Bird

2,4,5

Bird

4,5

Bird

2,4,5

Bird

3,5

Bird

3,5

Bird

4,5

Bird

2,5

Bird

2,3,5

Bird

3,5,10

Bird

Fish

1,5

Fish

2,4,5

Fish

3,5

Imperiled

Boulder County Wildlife Species of Special Concern

11/12/2013

Boulder County Species of Special Concern (continued) Species Name 71 Minnow, Brassy Hybognathus hankinsoni 72 Shiner, Bigmouth Notropis dorsalis 73 Shiner, Common Notropis cornutus 74 Stonecat Noturus flavus 75 Topminnow, Plains Fundulus sciadicus 76 Trout, Greenback Cutthroat Oncorhynchus clarki 77 Capshell, Rocky Mountain Acroloxus coloradensis 78 Floater, Giant Anodonta grandis 79 Papershell, Cylindrical Anodontoides ferussacianus 80 Physa, Banded Physa utahensis 81 Sprite, Umbilicate Promenetus umbilicatellus 82 (A miner bee) Macrotera opuntiae 83 Alpine, Theano Erebia pawlowskii 84 Azure, Hops Feeding Celastrina humulus 85 Bee, American Bumble Bombus pensylvanicus 86 Bee, Black and Gold Bumble Bombus auricomus 87 Bee, Variable Cuckoo Bumble Bombus variabilis 88 Bee, Western Bumble Bombus occidentalis 89 Beetle, Prairie Tiger Cicindela nebraskana 90 Blue, Colorado Euphilotes rita coloradensis 91 Dancer, Blue-Ringed Argia sedula 92 Darner, Lake Aeshna eremita 93 Dragonfly, Hudsonian Emerald Somatochlora hudsonica 94 Duskywing, Mottled Erynnis martialis 95 Elfin, Moss's Callophrys mossii 96 Emerald, American Cordulia shurtleffi 97 Fritillary, Regal Speyeria idalia 98 Jutta, Rocky Mountain Arctic Oeneis jutta 99 Skipper, Arogos Atrytone arogos 100 Skipper, Cross-line Polites origenes 101 Skipper, Dusted Atrytonopsis hianna 102 Skipper, Ottoe Hesperia ottoe 103 Skipper, Rhesus Polites rhesus 104 Skipper, Simius Roadside Amblyscirtes simius 105 Skipper, Snow's Paratrytone snowi

Class Fish

Criteria 1,5

Imperiled *

Fish

3,5

Fish

1,5

Fish

2,4,5

Fish

1,3,9

Gastropod

2,3

Gastropod

2,3

Gastropod

Insect

5,10

Insect

4,5,9

Insect

4,5

Insect

4,10

Insect

3,6

Insect

5,9,10

Insect

4,10

Insect

3,10

Insect

5,10

Insect

2,5,10

Insect

4,5

Insect

4,5

Insect

2,3,5

Insect

3,9

Insect

4,5

Insect

4,5

Insect

4,5

Insect

2,4,5

Insect

3,4

Insect

3,5

Insect

3,5

Species Name Skipper, Two-spotted Euphyes bimacula 107 Badger, American Taxidea taxus 108 Bat, Big Brown Eptesicus fuscus 109 Bat, Brazilian Free-tailed Tadarida brasiliensis 110 Bat, Eastern Red Lasiurus borealis 111 Bat, Hoary Lasiurus cinereus 112 Bat, Silver-haired Lasionycteris noctivagans 113 Bat, Townsend's Big-eared Corynorhinus townsendii 114 Bat, Tricolored Perimyotis subflavus 115 Beaver, North American Castor canadensis 116 Fox, Gray Urocyon cinereoargenteus 117 Jackrabbit, White-tailed Lepus townsendii 118 Lynx, Canada Lynx canadensis 119 Marten, American Martes americana 120 Mouse, Northern Rock Peromyscus nasutus 169 Chipmunk, Uinta Neotamias umbrinus 170 Gopher, Northern Pocket Thomomys talpoides 171 Mink, American Neovison vison 172 Mouse, Northern Grasshopper Onychomys leucogaster 173 Mouse, Olive-back Pocket Perognathus fasciatus 174 Mouse, Plains Harvest Reithrodontomys montanus 175 Mouse, Plains Pocket Perognathus flavescens 176 Mouse, Silky Pocket Perognathus flavus 177 Shrew, Dwarf Sorex nanus 178 Shrew, Merriam's Sorex merriami 179 Vole, Heather Phenacomys intermedius 180 Snake, Lined Tropidoclonion lineatum 121 Mouse, Prebles Meadow Jumping Zapus hudsonius 122 Myotis, Fringed Myotis thysanodes 123 Myotis, Little Brown Myotis lucifugas 124 Myotis, Long-eared Myotis evotis 125 Myotis, Long-legged Myotis volans 126 Myotis, Western Small-footed Myotis ciliolabrum 127 Otter, River Lontra canadensis 128 Pika Ochotona princeps 106

Class Insect

Criteria 4

Mammal

4,8,9

Mammal

4,8

Mammal

4,8

Mammal

2,3,4,9

Mammal

5,6

Mammal

5,10

Mammal

3,10

Mammal

1,2,3

Mammal

2,5

Mammal

5,10

Mammal

4,10

Mammal

5,10

Mammal

4,5,10

Mammal

5,10

Mammal

5,10

Reptile

9,10

Mammal

1,2,5

Mammal

2,4,5,8,9

Mammal

5,9

Mammal

5,8

Mammal

1,2,4

Mammal

5,9

Imperiled

Boulder County Wildlife Species of Special Concern Boulder County Species of Special Concern (continued) Species Name 129 Porcupine, North American Erethizon dorsatum 130 Prairie Dog, Black-tailed Cynomys ludovicianus 131 Rat, Ord's Kangaroo Dipodomys ordii 132 Ringtail Bassariscus astutus 133 Sheep, Rocky Mountain Bighorn Ovis canadensis canadensis 134 Shrew, American Water Sorex palustris 135 Shrew, Least Cryptotis parva 136 Squirrel, Spotted Ground Xerospermophilus spilosoma 137 Squirrel, Thirteen-lined Ground Ictidomys tridecemlineatus 138 Vole, Meadow Microtus pennsylvanicus 139 Lizard, Short-Horned Phrynosoma hernandesi 140 Snake, Common Garter Thamnophis sirtalis 141 Snake, Milk Lampropeltis triangulum 142 Turtle, Spiny Softshell Apalone spinifera Extirpated Species Species Name 143 Toad, Great Plains Bufo Cognatus 144 Curlew, Long-billed Numenius americanus 145 Goldeneye, Barrow's Bucephala islandica 146 Grouse, Plains Sharp-tailed Tympanuchus phasianellus jamesi 147 Plover, Mountain Charadrius montanus 148 Chub, Hornyhead Nocomis biguttatus 149 Dace, Northern Redbelly Phoxinus eos 150 Shiner, Blacknose Notropis heterolepis 151 Jewelwing, River Calopteryx aequabilis 152 Moth, Lost Ethmiid Ethmia monachella 153 Bear, Grizzly Ursus arctos 154 Bison Bison bison 155 Ferret, Black-footed Mustela nigripes 156 Fox, Swift Vulpes velox 157 Pronghorn Antilocarpa americana 158 Wolf, Gray Canis lupus 159 Wolverine Gulo gulo

Class Mammal

Criteria 3

Mammal

2,3,6,9

Mammal

5,10

Mammal

4,10

Mammal

2,9

Mammal

4,5,9,10

Mammal

Reptile

4,5,10

Reptile

2,3

Reptile

4,9

Reptile

4,10

Class Amphibian

Criteria 7

Bird

2,7

Bird

2,7

Fish

1,7

Fish

Insect

7,10

Mammal

1,2,7

Mammal

1,7

Mammal

1,2,7

Species of Undetermined Status Species Name 160 Owl, Mexican Spotted Strix occidentalis 161 Owl, Northern Pygmy Glaucidium gnoma 162 Sprite, Sharp Promenetus exacuous 163 (an Ant) Aphaenogaster huachucana 164 (an Ant) Formica laeviceps 165 (an Ant) Stigmatomma pallipes 166 (an Ant) Pheidole elecebra 167 Skipper, Two-banded Checkered Pyrgus ruralis 168 Chipmunk, Colorado Neotamias quadrivittatus 169 Chipmunk, Uinta Neotamias umbrinus 170 Gopher, Northern Pocket Thomomys talpoides 171 Mink, American Neovison vison 172 Mouse, Northern Grasshopper Onychomys leucogaster 173 Mouse, Olive-back Pocket Perognathus fasciatus 174 Mouse, Plains Harvest Reithrodontomys montanus 175 Mouse, Plains Pocket Perognathus flavescens 176 Mouse, Silky Pocket Perognathus flavus 177 Shrew, Dwarf Sorex nanus 178 Shrew, Merriam's Sorex merriami 179 Vole, Heather Phenacomys intermedius 180 Snake, Lined Tropidoclonion lineatum

Imperiled

11/12/2013

Class Bird

Criteria 1,10

Bird

gastropod

2,3,10

Insect

Mammal

5,10

Mammal

4,10

Mammal

5,10

Mammal

4,5,10

Mammal

5,10

Mammal

5,10

Reptile

9,10

Imperiled

Summary of changes to the Boulder County Species of Special Concern List from 1999 to 2013. Year 1994 2013 Total Species 153 180 New 64 Deleted 37

The Boulder County Species of Special Concern (SSC) list was updated from the current County list using the best and most current resources available. We compiled current and historical lists of special status species provided by various resource management agencies and conservation organizations. Many of these sources have been utilized in past Boulder County SSC lists and some are new resources for this update.

Common Teasel Identification and Management

List B

an study, common teasel resprouted 50% of the time after mechanically removing above ground vegetation. Common teasel can produce more than 2,000 seeds per plant. Plants die after production of seed has occurred. Seeds can stay viable for up to 14 years. Seeds germinate and establish readily, however, seeds don’t generally disperse far form the parent plant. The fruits are a four-angled achene, each containing a single seed.

lowers are range from white to violet. The flower head is generally eggshaped, with a square base. The long thin stiff floral bracts at the base of the inflorescence are generally longer than the flower head; these also have prickles. It flowers from April to September. This species reproduces by seed. In a Canadi-

2015 Quarter Quad Survey

estoration of infested and degraded sites is one of the keys to eradicating common teasel. Wetlands are important but very sensitive environments. Methods and techniques used in infested wetlands should follow best managment practices, such as those available at https://www.colorado.gov/pacific/agconservation/noxious-weed-publications. Preventing seed production is necessary to curtail the spread of this forb. Eradication efforts will need to continue for multiple consecutive seasons until the seed bank is depleted. Once eradication is complete, monitoring will be needed.

ommon teasel is designated as a “List B” species in the Colorado Noxious Weed Act. It is required to be eradicated; some populations may be contained or suppressed depending on state regulations. For state regulations described for each county, refer to the most recent Rule, or visit www.colorado.gov/ag/coweedcontacts for details.

Key ID Points

1. Long slender floral bracts extend beyond the top of the flower head. 2. Leaves are crinkled and have prickles. 3. Stems are stiff and have rows of prickles.

Dipsacus fullonum L.

ommon teasel, Dipsacus fullonum L., is a biennial or sometimes shortlived perennial forb. Mature plants can grow up to or over six feet tall and have a taproot. Common teasel has simple lanceolate to oblanceolate basal and stem leaves. Both leaves are conspicuously veined, wrinkled and have rough surface. Leaf margins are crenate. Stems leaves are lined with stiff prickles along the midrib. Stem leaves are opposite, net-veined, stalkless, and clasp the stem. The stem is rigid and also lined with several rows of downward turned prickles.

ommon teasel is native to Europe where historically it had many uses. Common teasel is spreading rapidly in America. It is common along major travel corridors and previously disturbed areas. It is invasive in moist soils, such as wetlands, fens and riparian corridors. This includes roadsides, swales, irrigation ditches. Upland dry sites are also vulnerable. These include open, sunny habitats such as abandoned fields, pastures, meadows and woodlands.

Common teasel

Integrated Weed Management Recommendations

List B

Effective integrated management means using a variety of eradication methods along with restoration, prevention of seed production and dispersal, and monitoring. Maintain robust healthy native landscapes. Restore degraded sites. Avoid soil disturbance. Prevent seed production in the first and second year. Prevent seed from dispersing, e.g. contaminated equipment. Rest sites until restored. Change land use practices. Use methods appropriate for the site; disturbing wetlands, fens and riparian areas is generally not advised without proper training.

CULTURAL CONTROL METHODS Maintain or restore a competitive assemblage of forbs, cool and warm season grasses. Implement whole site restoration of soils, plants and water regimes where stands of common teasel exist. Use locally adapted species that are ecologically appropriate for the site to improve competitiveness (e.g. wetland plants or upland plants). Include annual as well as perennial species. Incorporate soil amendments, soil microbes and mycorrhizal fungi in restoration efforts. Minimize soil compaction and disturbance, especially in wetlands and moist soil. Acquire permits for wetland restoration, if required.

Dipsacus fullonum L.

Common teasel

Rev. 11/16

BIOLOGICAL CONTROL METHODS Common teasel is not palatable to domestic livestock in part because of the abundance of prickles. Properly managed grazing can improve vigor of desired species and indireclty reduce common teasel. There are no biological control agents for common teasel authorized in Colorado that would effectively control common teasel. For more information about biological control agents, visit the Colorado Department of Agriculture’s Palisade Insectary website at https://www.colorado.gov/pacific/agconservation/biocontrol © Steve Dewey, UT State University, Bugwood

MECHANICAL CONTROL METHODS

Mechanical methods are best for infestations smaller than 0.5 acres; weigh this against other plants present, ecology and site condition. Sever roots below the soil surface during the first year before the plant stores energy, and in the second year before seed production. Mowing, chopping and deadheading stimulates more flower production; these methods require consecutive years of season-long treatments. Flower heads must be collected, bagged, and disposed of or destroyed; seeds will mature and germinate if left on the ground. Fire effects are unknown. Vegetation may not carry fire. Low severity prescribed fires may only kill the above ground vegetation, leaving roots and seeds unaffected. High severity prescribed fire may kill common teasel, but could damage native species and is not recommended.

CHEMICAL CONTROL METHODS NOTE: The following are recommendations for herbicides that can be applied to pastures and rangeland. Rates are approximate and based on equipment with an output of 30 gal/acre. Follow the label for exact rates. Always read, understand, and follow the label directions. The herbicide label is the LAW!

HERBICIDE

RATE

APPLICATION TIMING

Metsulfuron (Escort XP)

1 oz. product/acre + 0.25% v/v non-ionic surfactant

Apply when in rosette or bolting growth stage. (Spring or fall rosettes, or early summer bolting)

Aminopyralid (Milestone)*

4-7 oz. product/acre (start with 7 oz.) + 0.25% v/v non-ionic surfactant

Apply when in rosette or bolting growth stage. Best choice of herbicide to use in riparian areas. (Spring or fall rosettes, or early summer bolting) *Not permitted for use in the San Luis Valley.

Imazapic (Plateau)

8-12 oz. product/acre + 2 pints/ Apply when in rosette or bolting growth stage. Good choice of herbicide acre methylated seed oil to use in riparian areas. (Spring or fall rosettes, or early summer bolting)

Aminocyclopyrachlor + chlorsulfuron (Perspective)*

4.75-8 oz. product/acre + 0.25% Apply from the seedling to the bolting stage. IMPORTANT: Applications v/v non-ionic surfactant greater than 5.5 oz. product/acre exceeds the threshold for selectivity. DO NOT treat in the root zone of desirable trees and shrubs. Not for use on grazed or feed forage. *Product not permitted for use in the San Luis Valley.

Colorado Department of Agriculture - Conservation Services 305 Interlocken Parkway Broomfield, CO 80021 (303) 869-9030 www.colorado.gov/ag/weeds