HomeMy WebLinkAboutENCLAVE AT REDWOOD - PDP210004 - SUBMITTAL DOCUMENTS - ROUND 3 - WETLANDS DOCUMENTS
PO Box 272150, Fort Collins, CO 80527
info@cedarcreekassociatesinc.com
(970) 988-3106
Date: October 18, 2021
To: DHI Communities and Ripley Design
From: Cedar Creek Associates, Inc.
Subject: Wetland Evaluation for Enclave at Redwood
Cedar Creek Associates, Inc. (Cedar Creek) was retained by DHI Communities to evaluate a potential
wetland on City of Fort Collins property adjacent to the Enclave at Redwood development project. The
survey area is located along Conifer Road just to the west of Lemay Avenue. The delineation of natural
features, such as wetlands is required for development according to the City of Fort Collins Municipal
Land Use Code – Section 3.4. The survey area contains a detention pond, which was the target of the
wetland evaluation.
Methods
Wetland delineation and sampling of the wetlands within the survey area were completed using the
methods and techniques specified for "routine on-site delineations" in the publication, Corps of Engineers
Wetlands Delineation Manual (USACOE 1987), and supplemented by the document, Regional Supplement
to the Corps of Engineers Wetland Delineation Manual: Great Plains Region, Version 2.0 (USACOE 2010).
The survey area was evaluated using the three-parameter approach via test hole characteristics, the
outer vegetated wetland boundaries were collected via GPS units, and this boundary denoted the
demarcation between vegetated wetlands and upland vegetation. Two formal sample point locations
(W01 & U01) were established to characterize the wetland and adjacent upland in the survey area.At
each sample point, percent total cover of dominant plant species was estimated. Species were then
classed as OBL (obligate wetland species), FACW (facultative wetland species), FAC (facultative species),
FACU (facultative upland species) or UPL (upland species), based on the USDA, NRCS 2012 National
Wetland Plant List for the Great Plains Region (http://plants.usda.gov/wetland.html). Species without a
designated wetland indicator class were considered UPL. Soil and hydrologic data were also collected to
determine the presence or absence of wetlands at each sample point. A formal field data sheet was
completed for each sample point.
Findings
A 1.64 acre wetland is contained with the detention area making up the majority of the property (Figure
1). Dominate species recorded in these wetland were narrowleaf cattails (Typha angustifolia), reed
canarygrass (Phalaris arundinacea), plains cottonwood (Populus deltoides), coyote willow (Salix exigua),
and Russian olive (Elaeagnus angustifolia). The wetland/upland boundary was typically defined by a
transition from dominance by these species to smooth brome (Bromus inermis) and crested wheatgrass
(Agropyron cristatum). The wetland is characterized by dominance by herbaceous species in the core and
woody plants along the edges. The upland area immediately adjacent to the wetland appears to be
routinely mowed for maintenance. The wetland exhibited both hydric soils and hydrology to qualify as a
wetland. Determination of jurisdiction was not considered for this analysis. Completed data sheets and
photos can be found attached to this memo.
Appendix A
Photographs
Wetland Area
Upland Area
Appendix B
Data Sheets
US Army Corps of Engineers Great Plains – Version 2.0
WETLAND DETERMINATION DATA FORM – Great Plains Region
Project/Site: City/County: Sampling Date:
Applicant/Owner: State: Sampling Point:
Investigator(s): Section, Township, Range:
Landform (hillslope, terrace, etc.): Local relief (concave, convex, none): Slope (%):
Subregion (LRR): Lat: Long: Datum:
Soil Map Unit Name: NWI classification:
Are climatic / hydrologic conditions on the site typical for this time of year? Yes No (If no, explain in Remarks.)
Are Vegetation , Soil , or Hydrology significantly disturbed? Are “Normal Circumstances” present? Yes No
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? Yes No
Hydric Soil Present? Yes No
Wetland Hydrology Present? Yes No
Is the Sampled Area
within a Wetland? Yes No
Remarks:
VEGETATION – Use scientific names of plants.
Dominance Test worksheet:
Number of Dominant Species
That Are OBL, FACW, or FAC
(excluding FAC−): (A)
Total Number of Dominant
Species Across All Strata: (B)
Percent of Dominant Species
That Are OBL, FACW, or FAC: (A/B)
Prevalence Index worksheet:
Total % Cover of: Multiply by:
OBL species x 1 =
FACW species x 2 =
FAC species x 3 =
FACU species x 4 =
UPL species x 5 =
Column Totals: (A) (B)
Prevalence Index = B/A =
Hydrophytic Vegetation Indicators:
1 - Rapid Test for Hydrophytic Vegetation
2 - Dominance Test is >50%
3 - Prevalence Index is ≤3.01
4 - Morphological Adaptations1 (Provide supporting
data in Remarks or on a separate sheet)
Problematic Hydrophytic Vegetation1 (Explain)
1Indicators of hydric soil and wetland hydrology must
be present, unless disturbed or problematic.
Absolute Dominant Indicator
Tree Stratum (Plot size: ) % Cover Species? Status
1.
2.
3.
4.
= Total Cover
Sapling/Shrub Stratum (Plot size: )
1.
2.
3.
4.
5.
= Total Cover
Herb Stratum (Plot size: )
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
= Total Cover
Woody Vine Stratum (Plot size: )
1.
2.
= Total Cover
% Bare Ground in Herb Stratum
Hydrophytic
Vegetation
Present? Yes No
Remarks:
US Army Corps of Engineers Great Plains – Version 2.0
SOIL Sampling Point:
Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.)
Depth Matrix Redox Features
(inches) Color (moist) % Color (moist) % Type1 Loc2 Texture Remarks
1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix.
Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3:
Histosol (A1) Sandy Gleyed Matrix (S4) 1 cm Muck (A9) (LRR I, J)
Histic Epipedon (A2) Sandy Redox (S5) Coast Prairie Redox (A16) (LRR F, G, H)
Black Histic (A3) Stripped Matrix (S6) Dark Surface (S7) (LRR G)
Hydrogen Sulfide (A4) Loamy Mucky Mineral (F1) High Plains Depressions (F16)
Stratified Layers (A5) (LRR F) Loamy Gleyed Matrix (F2) (LRR H outside of MLRA 72 & 73)
1 cm Muck (A9) (LRR F, G, H) Depleted Matrix (F3) Reduced Vertic (F18)
Depleted Below Dark Surface (A11) Redox Dark Surface (F6) Red Parent Material (TF2)
Thick Dark Surface (A12) Depleted Dark Surface (F7) Very Shallow Dark Surface (TF12)
Sandy Mucky Mineral (S1) Redox Depressions (F8) Other (Explain in Remarks)
2.5 cm Mucky Peat or Peat (S2) (LRR G, H) High Plains Depressions (F16) 3Indicators of hydrophytic vegetation and
5 cm Mucky Peat or Peat (S3) (LRR F) (MLRA 72 & 73 of LRR H) wetland hydrology must be present,
unless disturbed or problematic.
Restrictive Layer (if present):
Type:
Depth (inches):
Hydric Soil Present? Yes No
Remarks:
HYDROLOGY
Wetland Hydrology Indicators:
Primary Indicators (minimum of one required; check all that apply) Secondary Indicators (minimum of two required)
Surface Water (A1) Salt Crust (B11) Surface Soil Cracks (B6)
High Water Table (A2) Aquatic Invertebrates (B13) Sparsely Vegetated Concave Surface (B8)
Saturation (A3) Hydrogen Sulfide Odor (C1) Drainage Patterns (B10)
Water Marks (B1) Dry-Season Water Table (C2) Oxidized Rhizospheres on Living Roots (C3)
Sediment Deposits (B2) Oxidized Rhizospheres on Living Roots (C3) (where tilled)
Drift Deposits (B3) (where not tilled) Crayfish Burrows (C8)
Algal Mat or Crust (B4) Presence of Reduced Iron (C4) Saturation Visible on Aerial Imagery (C9)
Iron Deposits (B5) Thin Muck Surface (C7) Geomorphic Position (D2)
Inundation Visible on Aerial Imagery (B7) Other (Explain in Remarks) FAC-Neutral Test (D5)
Water-Stained Leaves (B9) Frost-Heave Hummocks (D7) (LRR F)
Field Observations:
Surface Water Present? Yes No Depth (inches):
Water Table Present? Yes No Depth (inches):
Saturation Present? Yes No Depth (inches):
(includes capillary fringe)
Wetland Hydrology Present? Yes No
Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available:
Remarks:
US Army Corps of Engineers Great Plains – Version 2.0
WETLAND DETERMINATION DATA FORM – Great Plains Region
Project/Site: City/County: Sampling Date:
Applicant/Owner: State: Sampling Point:
Investigator(s): Section, Township, Range:
Landform (hillslope, terrace, etc.): Local relief (concave, convex, none): Slope (%):
Subregion (LRR): Lat: Long: Datum:
Soil Map Unit Name: NWI classification:
Are climatic / hydrologic conditions on the site typical for this time of year? Yes No (If no, explain in Remarks.)
Are Vegetation , Soil , or Hydrology significantly disturbed? Are “Normal Circumstances” present? Yes No
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? Yes No
Hydric Soil Present? Yes No
Wetland Hydrology Present? Yes No
Is the Sampled Area
within a Wetland? Yes No
Remarks:
VEGETATION – Use scientific names of plants.
Dominance Test worksheet:
Number of Dominant Species
That Are OBL, FACW, or FAC
(excluding FAC−): (A)
Total Number of Dominant
Species Across All Strata: (B)
Percent of Dominant Species
That Are OBL, FACW, or FAC: (A/B)
Prevalence Index worksheet:
Total % Cover of: Multiply by:
OBL species x 1 =
FACW species x 2 =
FAC species x 3 =
FACU species x 4 =
UPL species x 5 =
Column Totals: (A) (B)
Prevalence Index = B/A =
Hydrophytic Vegetation Indicators:
1 - Rapid Test for Hydrophytic Vegetation
2 - Dominance Test is >50%
3 - Prevalence Index is ≤3.01
4 - Morphological Adaptations1 (Provide supporting
data in Remarks or on a separate sheet)
Problematic Hydrophytic Vegetation1 (Explain)
1Indicators of hydric soil and wetland hydrology must
be present, unless disturbed or problematic.
Absolute Dominant Indicator
Tree Stratum (Plot size: ) % Cover Species? Status
1.
2.
3.
4.
= Total Cover
Sapling/Shrub Stratum (Plot size: )
1.
2.
3.
4.
5.
= Total Cover
Herb Stratum (Plot size: )
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
= Total Cover
Woody Vine Stratum (Plot size: )
1.
2.
= Total Cover
% Bare Ground in Herb Stratum
Hydrophytic
Vegetation
Present? Yes No
Remarks:
US Army Corps of Engineers Great Plains – Version 2.0
SOIL Sampling Point:
Profile Description: (Describe to the depth needed to document the indicator or confirm the absence of indicators.)
Depth Matrix Redox Features
(inches) Color (moist) % Color (moist) % Type1 Loc2 Texture Remarks
1Type: C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains. 2Location: PL=Pore Lining, M=Matrix.
Hydric Soil Indicators: (Applicable to all LRRs, unless otherwise noted.) Indicators for Problematic Hydric Soils3:
Histosol (A1) Sandy Gleyed Matrix (S4) 1 cm Muck (A9) (LRR I, J)
Histic Epipedon (A2) Sandy Redox (S5) Coast Prairie Redox (A16) (LRR F, G, H)
Black Histic (A3) Stripped Matrix (S6) Dark Surface (S7) (LRR G)
Hydrogen Sulfide (A4) Loamy Mucky Mineral (F1) High Plains Depressions (F16)
Stratified Layers (A5) (LRR F) Loamy Gleyed Matrix (F2) (LRR H outside of MLRA 72 & 73)
1 cm Muck (A9) (LRR F, G, H) Depleted Matrix (F3) Reduced Vertic (F18)
Depleted Below Dark Surface (A11) Redox Dark Surface (F6) Red Parent Material (TF2)
Thick Dark Surface (A12) Depleted Dark Surface (F7) Very Shallow Dark Surface (TF12)
Sandy Mucky Mineral (S1) Redox Depressions (F8) Other (Explain in Remarks)
2.5 cm Mucky Peat or Peat (S2) (LRR G, H) High Plains Depressions (F16) 3Indicators of hydrophytic vegetation and
5 cm Mucky Peat or Peat (S3) (LRR F) (MLRA 72 & 73 of LRR H) wetland hydrology must be present,
unless disturbed or problematic.
Restrictive Layer (if present):
Type:
Depth (inches):
Hydric Soil Present? Yes No
Remarks:
HYDROLOGY
Wetland Hydrology Indicators:
Primary Indicators (minimum of one required; check all that apply) Secondary Indicators (minimum of two required)
Surface Water (A1) Salt Crust (B11) Surface Soil Cracks (B6)
High Water Table (A2) Aquatic Invertebrates (B13) Sparsely Vegetated Concave Surface (B8)
Saturation (A3) Hydrogen Sulfide Odor (C1) Drainage Patterns (B10)
Water Marks (B1) Dry-Season Water Table (C2) Oxidized Rhizospheres on Living Roots (C3)
Sediment Deposits (B2) Oxidized Rhizospheres on Living Roots (C3) (where tilled)
Drift Deposits (B3) (where not tilled) Crayfish Burrows (C8)
Algal Mat or Crust (B4) Presence of Reduced Iron (C4) Saturation Visible on Aerial Imagery (C9)
Iron Deposits (B5) Thin Muck Surface (C7) Geomorphic Position (D2)
Inundation Visible on Aerial Imagery (B7) Other (Explain in Remarks) FAC-Neutral Test (D5)
Water-Stained Leaves (B9) Frost-Heave Hummocks (D7) (LRR F)
Field Observations:
Surface Water Present? Yes No Depth (inches):
Water Table Present? Yes No Depth (inches):
Saturation Present? Yes No Depth (inches):
(includes capillary fringe)
Wetland Hydrology Present? Yes No
Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections), if available:
Remarks: