Wetland Delineation Report Dillon Valley Church Summit County, Colorado

Alpine Ecological Resources, LLC

Prepared for: Summit County January 28, 2019

Andy Herb, Ecologist/Owner 1127 Adams Street Denver, CO 80206 Dillon Valley Church Wetland Delineation Report

Table of Contents

1.0 Introduction ...... 3 1.1 Purpose of This Report ...... 3 1.2 Project Description ...... 3

2.0 Site Description ...... 4

3.0 Methods ...... 5 3.1 Literature Review ...... 5 3.2 Field Data Collection ...... 5 3.3 Mapping ...... 6 3.4 Wetland Classification ...... 6 3.5 Wetland Functional Condition ...... 6 3.6 Jurisdictional Status ...... 6

4.0 Wetlands ...... 8 4.1 General Description ...... 8 4.2 Vegetation ...... 8 4.3 Hydrology ...... 8 4.4 Soils ...... 8 4.5 Wetland Functional Condition ...... 9

5.0 Other Water Features ...... 10

6.0 Literature Cited ...... 11

List of Figures Figure 1—Site Location Map Figure 2—Wetlands and Other Water Features

List of Appendices Appendix A—Wetland Determination Data Forms Appendix B—Site Photographs

Dillon Valley Church Wetland Delineation Report

List of Acronyms and Abbreviations Corps United States Army Corps of Engineers CWA Clean Water Act FAC Facultative FACU Facultative Upland FACW Facultative Wetland FACWet Functional Assessment of Colorado Wetlands HGM Hydrogeomorphic Method HUC Hydrologic Unit Code OBL Obligate PEM Palustrine Emergent PSS Palustrine Scrub-shrub MSL Mean Sea Level NRCS Natural Resources Conservation Service NWPL National Wetland Plant List RPW Relatively Permanent Water TNW Traditional Navigable Water UPL Upland US United States USDA United States Department of Agriculture USFWS United States Fish and Wildlife Service USGS United States Geological Survey UTM Universal Transversal Mercator WGS 84 World Geodetic System of 1984

Dillon Valley Church Wetland Delineation Report

1.0 Introduction 1.1 Purpose of This Report The purpose of this report is to formally document the wetlands and other water features present in the study area. The primary reason for this documentation is to assist with project planning and design, which is intended to maximize avoidance of these features wherever practicable. The wetland and other water features described in this report include all those present, not just those that may be considered jurisdictional under Section 404 of the Clean Water Act (CWA). 1.2 Project Description The project involves the redevelopment of the site into residential units.

Dillon Valley Church Wetland Delineation Report

2.0 Site Description The 2.9-acre study area is in Summit County, approximately 0.58 mile north of Dillon Reservoir in Dillon, Colorado immediately west of the intersection of Straight Creek Drive and Deer Path Road (Figure 1). It is situated at approximately 9,000 feet above mean sea level (MSL) with a hydrologic unit code (HUC) of 14010002 (Blue). It can be found on the United States Geological Survey (USGS) 7.5-minute Dillon, Colorado quadrangle. It has the following coordinates (datum is WGS 84):

▪ Township 5S, Range 77W, Section 7

▪ Universal Transversal Mercator (UTM): 13N 409815.5E, 4387741.2N ▪ Latitude/Longitude: 39.634698°N, -106.050933°W The study area is surrounded by residential development on the north, east, and south. Straight Creek forms the western edge of the study area, with Interstate-70 immediately to the west of the creek. Historically, the study area likely would have been part of the active Straight Creek floodplain but the floodplain appears to have been filled long ago and the creek straightened.

The site is in the Crystalline Mid-Elevation Forest Ecoregion which occurs in the eastern half of the southern Rockies between 7,000 and 9,000 feet above MSL (Chapman, et al. 2006). Natural vegetation in the ecoregion includes aspen, ponderosa pine, Douglas-fir, and areas of lodgepole and limber pine. Land uses include wildlife habitat, livestock grazing, logging, mineral extraction, and recreation with increasing residential subdivisions. The site is also in the Southern Rocky Mountain Forest and Range Land Resource Region (NRCS 2006). This Land Resource Region is characterized by rugged mountains with some broad valleys and remnants of high plateaus. Precipitation ranges from 7 to 63 inches per year and the primary soil resource concerns are erosion by wind and water and maintaining the productivity of the soils. Most of the land in this region is federally owned.

Dillon Valley Church Wetland Delineation Report

3.0 Methods 3.1 Literature Review Prior to conducting the field survey, numerous sources of data were reviewed to gain a general understanding of the ecology of the study area. These sources included aerial imagery, topographic maps, United States (US) Fish and Wildlife (USFWS) Wetlands Mapper (USFWS 2018), NRCS Web Soil Survey (NRCS 2018), other state and federal agency websites, and other relevant data. 3.2 Field Data Collection Andy Herb (AlpineEco) surveyed the entire study area on September 20, 2018 to identify wetlands and other water features. These features were delineated within the defined study area using procedures outlined in the Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region (Corps 2010). This involved a detailed examination of plants, soils, and hydrologic indicators present. Generally, the detailed examination of wetlands involves the collection of vegetation, soil, and hydrology data at paired data points. These paired points include one point within the suspected wetland and one point in the adjacent upland. However, if numerous wetlands are in close proximity and surrounded by the same or similar upland plant community, then upland data points of nearby sites are often utilized, rather than creating a new upland data point for each wetland area. All plants considered dominant in wetlands, as well as other commonly observed species, were identified and are listed in this report. During field examinations, a list of dominant plants was documented for each potential wetland area and was compared to the National Wetland Plant List (NWPL) (Corps 2018) to determine the “wetland indicator status” of each species. Indicator ratings are as follows (Corps 2012): obligate (OBL) = almost always occur in wetlands; facultative wet (FACW) = usually occur in wetlands but may occur in non-wetlands; facultative (FAC) = occur in wetlands and non-wetlands; facultative upland (FACU) = usually occur in non-wetlands but may occur in wetlands; and upland (UPL) = almost never occur in wetlands. If the species is not included in the NWPL, then the indicator rating is assumed to be UPL. The indicator ratings are provided in the text of this report and follow the plant’s scientific name. Generally, if at least 50 percent of those species had an indicator rating of FAC or wetter, the potential wetland area would satisfy the Corps criterion for wetland vegetation. The botanical nomenclature presented in this report follows the NWPL. If a species is not listed in the NWPL, then the nomenclature follows PLANTS Database (USDA, NRCS 2018). Soils were examined at various locations throughout the study area to identify the presence of hydric soil indicators. If indicators were found, multiple pits may have been dug along the gradient to identify the extent of hydric soils.

While recording plant species and identifying soil characteristics, potential wetlands within the study area were assessed for evidence and potential sources of wetland hydrology. This evidence included primary indicators such as the presence of surface water and saturation and secondary indicators such as geomorphic position and drainage patterns. Most surrounding uplands were not formally sampled or recorded on data forms and were generally examined while attempting to identify wetland areas. Those uplands

Dillon Valley Church Wetland Delineation Report examined in more detail or recorded on data forms typically exhibited evidence of at least one wetland indicator (hydrophytic vegetation, hydric soils, or wetland hydrology). Data collected for all areas investigated and deemed non-wetland are not necessarily included in this report. 3.3 Mapping After determining the approximate extent of the wetlands based on the presence of hydric soils, hydrophytic vegetation, and wetland hydrology, the wetland boundary was flagged and recorded using a sub-meter global positioning system device. 3.4 Wetland Classification Wetlands in the study area were classified in accordance with the Hydrogeomorphic Method (HGM) (Brinson 1993) and the Classification of Wetlands and Deep Water Habitats of the United States (Cowardin, et al. 1979). The only HGM wetland type applicable to wetlands in the study area is riverine which are those associated with a channel or channel network, and supported by overbank flooding or alluvial groundwater. Two Cowardin wetland types are relevant to wetlands in the study area, including palustrine emergent (PEM) and palustrine scrub-shrub (PSS). PEM wetlands are those dominated by herbaceous vegetation (grasses, grass- likes, and forbs). PSS wetlands are those dominated by shrubs or trees less than 20 feet tall. 3.5 Wetland Functional Assessment Wetland functional condition was generally assessed using the concepts presented in the Functional Assessment of Colorado Wetlands (FACWet) Method (Johnson, et al. 2013), although a complete assessment was not conducted. FACWet is a rapid assessment method that provides a reliable and consistent approach to rating the condition of wetlands relative to their natural potential by focusing on the presen ce of stressors. Stressors are human-caused changes to a wetland or adjacent lands that alter a wetland’s ability to perform ecological functions and processes. 3.6 Jurisdictional Status The jurisdictional status of wetlands and other water features is generally based on the US Army Corps of Engineers Jurisdictional Determination Form Instructional Guidebook (Corps 2007) and other Corps documents (Corps 2008). In order for an aquatic feature to be considered a “water of the US” and jurisdictional under Section 404 of CWA, it must be at least one of the following: ▪ A traditional navigable water (TNW) ▪ A wetland adjacent to a TNW ▪ A relatively permanent water (RPW), including tributaries that typically flow year-round or have a continuous flow at least seasonally, typically three months ▪ A wetland that directly abuts a RPW ▪ A wetland adjacent to a RPW, but only if it can be shown that the feature has a “significant nexus” with a TNW ▪ A non-RPW or wetland adjacent to a non-RPW, if the feature has a “significant nexus” with a TNW The significant nexus evaluation includes an assessment of the flow characteristics and functions of the feature to see if it has “more than an insubstantial or speculative

Dillon Valley Church Wetland Delineation Report effect on the chemical, physical, or biological integrity of TNWs” (Corps 2007). If it does, then it is considered jurisdictional.

Dillon Valley Church Wetland Delineation Report

4.0 Wetlands The study area contains 0.18 acre of wetlands and all are situated immediately adjacent to Straight Creek or on its floodplain. They are classified according to Cowardin, et al. (1979) as mainly PSS and according to the Hydrogeomorphic (HGM) Classification System as riverine (Brinson 1993). The wetlands are generally narrow and restricted to the immediate banks of the creek, except two small wetlands at the extreme southern edge of the study area that are on the greater (historic) Straight Creek floodplain. All the wetlands are likely jurisdictional under Section 404 of the Clean Water Act as a result of directly abutting or being adjacent to Straight Creek which is likely a RPW and tributary to the Blue River. The wetlands are described in the following sections and shown on Figure 2. Wetland Determination Data Forms are in Appendix A and site photographs are in Appendix B. 4.1 Vegetation The wetlands in the study area are dominated by park willow (Salix monticola - OBL) and Drummond’s willow (S. drummondiana - FACW), with an understory of mostly bluejoint (Calamagrostis canadensis - FACW) and American cow-parsnip (Heracleum maximum - FAC). Other common species observed include Northwest Territory sedge (Carex uticulata - OBL), woolly sedge (Carex pellita - OBL), Columbian monkshood (Aconitum columbianum - FACW), thinleaf alder (Alnus incana - FACW), and resin birch (Betula glandulosa - OBL). The wetland boundary is characterized by an abrupt transition (in most areas) from willows (Salix spp.), bluejoint, and other hydrophytes, to willows with an upland understory comprised of mostly weedy herbaceous species like Kentucky bluegrass (Poa pratensis – FAC), Canadian thistle (Cirsium arvense – FAC), and smooth brome (Bromus inermis – UPL). Most areas have an abrupt transition because of the presence of very steep banks, which appear to be the result of historic straightening of the creek and fill placement on the floodplain. 4.2 Hydrology The primary source of hydrology for the wetlands is high alluvial groundwater and seasonal overbank flows associated with Straight Creek. Direct precipitation and possibly some stormwater runoff from Deer Path Road may also be contributing water. Wetland hydrology indicators observed include: Surface Water (A1), Saturation (A3), Geomorphic Position (D2), and the FAC-Neutral Test (D5). 4.3 Soils According to the Web Soil Survey (NRCS 2018), the soils in the study area are mapped as predominantly Handran gravelly loam (0-3 percent slopes) with a small area of Histic Cryaquolls (nearly level) at the southern end. Handran gravelly loam is commonly found on floodplain terraces and is well drained. The parent material is alluvium. The typical profile consists of gravelly loam from 0 to 6 inches, gravelly sandy loam from 6 to 15 inches, and very cobbly sandy loam from 15 to 60 inches. This soil type is not listed as hydric. Histic Cryaquolls soil is commonly found on alluvial fans and floodplains, and is poorly drained. The parent material is organic matter over. The typical profile consists of mucky peat to 8 inches, stratified sandy loam to clay from 8 to 28 inches, and sand and gravel from 28 to 60 inches. This soil type is listed as hydric.

Dillon Valley Church Wetland Delineation Report

Soil pits excavated in the wetlands somewhat confirmed the presence of the Handran gravelly loam, and revealed sandy clay loam and silty loam within the upper 13 inches, with cobble below. Although no hydric soil indicators were observed, hydric soils are assumed to be present because of the distinct wetland boundary, and presence of both wetland hydrology and hydrophytic vegetation. 4.4 Wetland Functional Condition Based on the concepts presented in the FACWet Method (Johnson, et al. 2013), the primary condition of the wetlands in the study area is “D” or “Functioning Impaired.” Many stressors are present in the study area that have resulted in alterations to the system. The most substantial stressors include widespread historic wetland loss and realignment of Straight Creek; and infrastructure, residential, and commercial development that has reduced habitat connectivity and contributed to alterations of wetland and stream morphology, hydrology, and habitat.

Dillon Valley Church Wetland Delineation Report

5.0 Other Water Features Straight Creek is the only other water feature in the study area and it encompasses 0.12 acre (583 linear feet). It flows along the extreme west edge of the study area from north to south. As a result of previous disturbances, the creek is mostly entrenched with very little floodplain in the study area (Figure 2). The channel generally has a cobble/boulder bottom and varies from 10 to 15 feet wide. The creek flows south approximately 0.5 mile to its confluence with the Blue River. It is likely considered a RPW.

Dillon Valley Church Wetland Delineation Report

6.0 Literature Cited Brinson, M. 1993. A Hydrogeomorphic Classification for Wetlands. Technical Report WRP-DE-4, US Army Engineer Waterways Experiment Station. Vicksburg, MS. Chapman, SS, Griffith, GE, Omernik, JM, Price, AB, Freeouf, J, and Schrupp, DL. 2006. Ecoregions of Colorado (color poster with map, descriptive text, summary tables, and photographs): Reston, Virginia, U.S. Geological Survey (map scale 1:1,200,000). Cowardin, LM, Carter, V, Golet, FC, and LaRoe, ET. 1979. Classification of Wetlands and Deepwater Habitats of the United States. US Department of the Interior, Fish and Wildlife Service, FWS/OBS-79/31. Johnson, B, Beardsley, M, and Doran, J. 2013. The Functional Assessment of Colorado Wetlands (FACWet) Method. Version 3.0. Prepared for the Colorado Department of Transportation DTD Applied Research and Innovation Branch. April. Natural Resources Conservation Service (NRCS). 2006. Land Resource Regions and Major Land Resource Areas of the United States, the Caribbean, and the Pacific Basin . United States Department of Agriculture Handbook 296. NRCS. 2018.Web Soil Survey. http://websoilsurvey.nrcs.usda.gov/app/. Accessed in December. US Army Corps of Engineers (Corps). 2007. US Army Corps of Engineers Jurisdictional Determination Form Instructional Guidebook. Prepared by US Environmental Protection Agency. May 30. Corps. 2008. Clean Water Act Jurisdiction Following the US Supreme Court’s Decision in Rapanos v. United States & Carabell v. United States. December 2. Corps. 2010. Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region. ERDC/EL TR-10-3. May.

Corps. 2012. National Wetland Plant List Indicator Rating Definitions. ERDC/CRREL N-12-1. July. Corps. 2018. National Wetland Plant List, version 3.3. http://wetland_plants.Corps.army.mil/. Accessed in December. US Department of Agriculture (USDA), NRCS. 2018. PLANTS Database. http://plants.usda.gov/plants/index.html. National Plant Data Team, Greensboro, NC 27401-4901 USA. Accessed in December. US Fish and Wildlife Service (USFWS). 2018. Wetlands Mapper, https://www.fws.gov/wetlands/data/mapper.HTML. Accessed in December.

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Appendix A Wetland Determination Data Forms

WETLAND DETERMINATION DATA FORM - Western Mountains, Valleys, and Coast Region Project/Site: Dillon Valley Church City/County: Dillon/Summit Sampling Date: 9/20/18 Applicant/Owner: Summit County State: Colorado Sampling Point: SP-1 Investigator(s): Andy Herb Section, Township, Range: S7 T5S R77W Landform (hillslope, terrace, etc.): Floodplain Local relief (concave, convex, none): convex Slope (%): 2% Subregion (LRR): Rocky Mountain Range and Forest (LRR E), 48A Lat.: 39.385.01 Long.: -106.3568 Datum: WGS 84 Soil Map Unit Name: Handran gravelly loam, 0-3 percent slope NWI Classification: N/A Are climatic/hydrologic conditions of the site typical for this time of the year? Y (If no, explain in remarks) Are vegetation , soil , or hydrology X significantly disturbed? Are "normal circumstances" present? Y Are vegetation , soil , or hydrology naturally problematic? (If needed, explain any answers in remarks) SUMMARY OF FINDINGS - Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic vegetation present? Y Hydric soil present? Y Is the sampled area within a wetland? Y Indicators of wetland hydrology present? Y If yes, optional wetland site ID: Remarks: (Explain alternative procedures here or in a separate report.) Creek straightened and very little floodplain on river-left. Sample point in narrow PEM fringe on steep slope up to historic fill area.

VEGETATION - Use scientific names of plants Absolute % Dominant Indicator 50/20 Thresholds 20% 50% Tree Stratum Plot Size ( 30 feet ) Cover Species Status Tree Stratum 0 0 1 Sapling/Shrub Stratum 0 0 2 Herb Stratum 19 49 3 Woody Vine Stratum 0 0 4 Dominance Test Worksheet 0 = Total Cover Number of Dominant Species that are OBL, FACW, or FAC: Sapling/Shrub Absolute % Dominant Indicator 2 (A) Plot Size ( 15 feet ) Stratum Cover Species Status Total Number of Dominant 1 Species Across all Strata: 2 (B) 2 Percent of Dominant Species 3 that are OBL, FACW, or FAC: 4 100.00% (A/B) 5 Prevalence Index Worksheet 0 = Total Cover Total % Cover of: Absolute % Dominant Indicator OBL species 35 x 1 = 35 Herb Stratum Plot Size ( 5 feet ) Cover Species Status FACW species 5 x 2 = 10 1 Alopecurus pratensis 50 Y FAC FAC species 57 x 3 = 171 2 Carex utriculata 35 Y OBL FACU species 0 x 4 = 0 3 Rumex occidentalis 5 N FACW UPL species 0 x 5 = 0 4 Heracleum maximum 5 N FAC Column totals 97 (A) 216 (B) 5 Cirsium arvense 2 N FAC Prevalence Index = B/A = 2.23 6 Hydrophytic Vegetation Indicators: 7 Rapid test for hydrophytic vegetation 8 X Dominance test is >50% 9 X Prevalence index is ≤3.0* 10 Morphogical adaptations* (provide 11 supporting data in Remarks or on a 97 = Total Cover separate sheet) Problematic hydrophytic vegetation* Woody Vine Absolute % Dominant Indicator (explain) Plot Size ( ) Stratum Cover Species Status *Indicators of hydric soil and wetland hydrology must 1 be present, unless disturbed or problematic 2 0 = Total Cover Hydrophytic % Bare Ground in Herb Stratum: 0 vegetation present? Y Remarks: Wetland vegetation abruptly transitions to Bromus inermis.

US Army Corps of Engineers Western Mountains, Valleys, and Coast Region Project Site: Dillon Valley Church SOIL Sampling Point: SP-1 Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features Texture Remarks (Inches) Color (moist) % Color (moist) % Type* Loc** 0-6 10 YR 2/2 100 Silty Loam Mostly live roots 6+ Large Cobble

*Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains **Location: PL=Pore Lining, M=Matrix Hydric Soil Indicators: Indicators for Problematic Hydric Soils: Histisol (A1) Stripped Matrix (S6) 2 cm Muck (A10) (LRR K, L, MLRA 149B Histic Epipedon (A2) Loamy Mucky Mineral (F1) (LRR Red Parent Material (TF2) Black Histic (A3) K, L) Very Shallow Dark Surface (TF12) Hydrogen Sulfide (A4) Loamy Gleyed Matrix (F2) X Other (Explain in Remarks) Depleted Below Dark Suface (A11) Depleted Matrix (F3) Thick Dark Surface (A12) Redox Dark Surface (F6) Sandy Mucky Mineral (S1) Depleted Dark Surface (F7) Sandy Gleyed Matrix (S4) Redox Depressions (F8) Sandy Redox (S5) *Indicators of hydrophytic vegetation and weltand hydrology must be present, unless disturbed or problematic Restrictive Layer (if observed): Type: Hydric soil present? Y Depth (inches): Distinct wetland boundary with wetland hydrology and hydrophytic vegetation. Assume hydric soils. Remarks:

HYDROLOGY Secondary Indicators (minimum of two Primary Indicators (minimum of one is required; check all that apply) required) Surface Water (A1) Water-Stained Leaves (B9) Water-Stained Leaves (B9) (except High Water Table (A2) (except MLRA 1,2,4A, and 4B) MLRA 1,2,4A, and 4B) Saturation (A3) Salt Crust (B11) Drainage Patterns (B10) Water Marks (B1) Aquatic Invertebrates (B13) Dry-Season Water Table (C2) Sediment Deposits (B2) Hydrogen Sulfide Odor (C1) Saturation Visible on Aerial Imagery (C9) Drift Deposits (B3) Oxidized Rhizospheres on Living X Geomorphic Position (D2) Algal Mat or Crust (B4) Roots (C3) Shallow Aquitard (D3) Iron Deposits (B5) Presence of Reduced Iron (C4) X FAC-Neutral Test (D5) Surface Soil Cracks (B6) Recent Iron Reduction in Tilled Soils (C6) Raised Ant Mounts (D6)(LRR A) Inundation Visible on Aerial Imagery (B7) Stunted or Stressed Plants (D1)(LRRA) Frost-Heave Hummocks (D7) Sparsely Vegetated Concave Surface (B8) X Other (Explain in Remarks)

Field Observations: Surface water present? Yes No X Depth (inches): Indicators of Water table present? Yes No X Depth (inches): wetland Saturation present? Yes No X Depth (inches): hydrology (includes capillary fringe) present? Y

Describe recorded data (stream gauge, monitoring well, aerial photos, previous inspections), if available:

Sample point less than 1-foot above ordinary high water mark. Experiences overbank flows and capillary action from Straight Creek. Remarks:

US Army Corps of Engineers Western Mountains, Valleys, and Coast Region WETLAND DETERMINATION DATA FORM - Western Mountains, Valleys, and Coast Region Project/Site: Dillon Valley Church City/County: Dillon/Summit Sampling Date: 9/20/18 Applicant/Owner: Summit County State: Colorado Sampling Point: SP-2 Investigator(s): Andy Herb Section, Township, Range: S7 T5S R77W Landform (hillslope, terrace, etc.): Former floodplain terrace Local relief (concave, convex, none): none Slope (%): <1 Subregion (LRR): Rocky Mountain Range and Forest (LRR E), 48A Lat.: 39.38452 Long.: -106.3268 Datum: WGS 84 Soil Map Unit Name: Handran gravelly loam, 0-3 percent slope NWI Classification: N/A Are climatic/hydrologic conditions of the site typical for this time of the year? Y (If no, explain in remarks) Are vegetation , soil X , or hydrology significantly disturbed? Are "normal circumstances" present? N Are vegetation X , soil , or hydrology naturally problematic? (If needed, explain any answers in remarks) SUMMARY OF FINDINGS - Attach site map showing sampling point locations, transects, important features, etc. Hydrophytic vegetation present? N Hydric soil present? N Is the sampled area within a wetland? N Indicators of wetland hydrology present? N If yes, optional wetland site ID: Remarks: (Explain alternative procedures here or in a separate report.) Former floodplain historically filled to channel edge. Dominance of weedy vegetation.

VEGETATION - Use scientific names of plants Absolute % Dominant Indicator 50/20 Thresholds 20% 50% Tree Stratum Plot Size ( 30 feet ) Cover Species Status Tree Stratum 0 0 1 Sapling/Shrub Stratum 0 0 2 Herb Stratum 14 36 3 Woody Vine Stratum 0 0 4 Dominance Test Worksheet 0 = Total Cover Number of Dominant Species that are OBL, FACW, or FAC: Sapling/Shrub Absolute % Dominant Indicator 1 (A) Plot Size ( 15 feet ) Stratum Cover Species Status Total Number of Dominant 1 Species Across all Strata: 3 (B) 2 Percent of Dominant Species 3 that are OBL, FACW, or FAC: 4 33.33% (A/B) 5 Prevalence Index Worksheet 0 = Total Cover Total % Cover of: Absolute % Dominant Indicator OBL species 0 x 1 = 0 Herb Stratum Plot Size ( 5 feet ) Cover Species Status FACW species 0 x 2 = 0 1 Elymus repens 30 Y FAC FAC species 30 x 3 = 90 2 Bromus inermis 20 Y UPL FACU species 20 x 4 = 80 3 Lactuca serriola 20 Y FACU UPL species 22 x 5 = 110 4 Thlaspi arvense 2 N UPL Column totals 72 (A) 280 (B) 5 Prevalence Index = B/A = 3.89 6 Hydrophytic Vegetation Indicators: 7 Rapid test for hydrophytic vegetation 8 Dominance test is >50% 9 Prevalence index is ≤3.0* 10 Morphogical adaptations* (provide 11 supporting data in Remarks or on a 72 = Total Cover separate sheet) Problematic hydrophytic vegetation* Woody Vine Absolute % Dominant Indicator (explain) Plot Size ( ) Stratum Cover Species Status *Indicators of hydric soil and wetland hydrology must 1 be present, unless disturbed or problematic 2 0 = Total Cover Hydrophytic % Bare Ground in Herb Stratum: 28 vegetation present? N Remarks: Disturbed area. Mostly weedy vegetation.

US Army Corps of Engineers Western Mountains, Valleys, and Coast Region Project Site: Dillon Valley Church SOIL Sampling Point: SP-2 Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.) Depth Matrix Redox Features Texture Remarks (Inches) Color (moist) % Color (moist) % Type* Loc** 0-13 10 YR 3/3 100 M Sandy Clay Loam Large cobble present

*Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains **Location: PL=Pore Lining, M=Matrix Hydric Soil Indicators: Indicators for Problematic Hydric Soils: Histisol (A1) Stripped Matrix (S6) 2 cm Muck (A10) (LRR K, L, MLRA 149B Histic Epipedon (A2) Loamy Mucky Mineral (F1) (LRR Red Parent Material (TF2) Black Histic (A3) K, L) Very Shallow Dark Surface (TF12) Hydrogen Sulfide (A4) Loamy Gleyed Matrix (F2) Other (Explain in Remarks) Depleted Below Dark Suface (A11) Depleted Matrix (F3) Thick Dark Surface (A12) Redox Dark Surface (F6) Sandy Mucky Mineral (S1) Depleted Dark Surface (F7) Sandy Gleyed Matrix (S4) Redox Depressions (F8) Sandy Redox (S5) *Indicators of hydrophytic vegetation and weltand hydrology must be present, unless disturbed or problematic Restrictive Layer (if observed): Type: Hydric soil present? N Depth (inches): Dry. Lots of cobble and gravel. Remarks:

HYDROLOGY Secondary Indicators (minimum of two Primary Indicators (minimum of one is required; check all that apply) required) Surface Water (A1) Water-Stained Leaves (B9) Water-Stained Leaves (B9) (except High Water Table (A2) (except MLRA 1,2,4A, and 4B) MLRA 1,2,4A, and 4B) Saturation (A3) Salt Crust (B11) Drainage Patterns (B10) Water Marks (B1) Aquatic Invertebrates (B13) Dry-Season Water Table (C2) Sediment Deposits (B2) Hydrogen Sulfide Odor (C1) Saturation Visible on Aerial Imagery (C9) Drift Deposits (B3) Oxidized Rhizospheres on Living Geomorphic Position (D2) Algal Mat or Crust (B4) Roots (C3) Shallow Aquitard (D3) Iron Deposits (B5) Presence of Reduced Iron (C4) FAC-Neutral Test (D5) Surface Soil Cracks (B6) Recent Iron Reduction in Tilled Soils (C6) Raised Ant Mounts (D6)(LRR A) Inundation Visible on Aerial Imagery (B7) Stunted or Stressed Plants (D1)(LRRA) Frost-Heave Hummocks (D7) Sparsely Vegetated Concave Surface (B8) Other (Explain in Remarks)

Describe recorded data (stream gauge, monitoring well, aerial photos, previous inspections), if available:

Sample point 3-feet above low flow mark and approximately 1-foot above wetland boundary.

Remarks:

US Army Corps of Engineers Western Mountains, Valleys, and Coast Region

Appendix B Site Photographs

Photo 1 — Looking northeast at the disturbed area east of Straight Creek

Photo 2 — Looking northeast (upstream) at the PSS wetlands and Straight Creek channel

1 Appendix B Site Photographs

Photo 3 — Looking northeast at the narrow PEM (foreground) and PSS (background) fringe wetlands along Straight Creek

Photo 4 — Looking north at the upland area (foreground) and PSS wetlands (background to the left) adjacent to Straight Creek

2 Appendix B Site Photographs

Photo 5 – Looking west at the upland area (foreground) and PSS wetlands (background) adjacent to Straight Creek

Photo 6 — Looking north at Straight Creek and the adjacent area recently disturbed for culvert replacement work on Little Beaver Trail