HomeMy WebLinkAboutHARMONY RIDGE PUD, PHASE 2 (2ND FILING) - PRELIMINARY / FINAL - 49-95D - SUBMITTAL DOCUMENTS - ROUND 1 - WETLANDS DOCUMENTS (3)WETLAND A
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VICINITY MAP
6i WETLAND B
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ny Ridge PUD
ss I PImUminaryMnal Ske Plan
Fort Collins, Colorado
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I.H� IM •M t•H
HARMONY RIDGE
GENERAL LOCATION MAP
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Copynght 0 1988-1997, Mi=scR Corporation and/or Its suppliers. All rights reserved. Please visit cur web site at http://maps.iopedia com. Page 1
APPENDIX A
Site Location Map
Jurisdictional Wetlands Location Map
6.0
Cowardin, L.W., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of Wetlands and
Deepwater Habitats of the United States. U.S. Fish and Wildlife Service, Biological Services
Program: FWS/OBS-79/31.
Jim Sell Design, 1999. Base map of the site boundaries. Fort Collins, Colorado.
Reed, P.B., Jr. 1988. National List of Plant Species that Occur in Wetlands: Central Plains
(Region 5). U.S. Fish and Wildlife Service Biological Report 88(26.5).
U.S. Army Corps of Engineers (COE) Environmental Laboratory. 1987. Corps of Engineers Wetlands
Delineation Manual. Technical Report Y-87-1, U.S. Army Engineer Waterways Experiment
Station, Vicksburg, Mississippi.
U.S. Department of Agriculture (USDA), Soil Conservation Service. 1993. Larimer County Area,
Colorado: Comprehensive Hydric Soils List.
U.S. Department of Agriculture (USDA), Soil Conservation Service. 1975. Soil Survey of Larimer
County Area, Colorado.
U.S. Department of the Interior, Geological Survey (USGS). 1980. 7.5-Minute Series Topographic
Map for the Fort Collins, Colorado, Quadrangle.
U.S. Fish and Wildlife Service (USFWS). 1975. National Wetlands Inventory Map for the Fort
Collins, Colorado, Quadrangle.
Weber, W.A. 1976. Rocky Mountain Flora. Colorado Associated University Press. Boulder, Colorado.
6-1
5.0 RECOMMENDATIONS
The wetlands delineation described in this report will be submitted to the COE, Omaha District, Tri-
Lakes Project Office, in Littleton, Colorado for approval. Acceptance will be conveyed in the form of
a letter. If accepted, the COE will recommend that this wetlands delineation be considered valid for 5
years from the date of the letter unless new information warrants revision before the 5 years expire. A
COE Section 404 permit may be required based on the area of disturbance to jurisdictional wetlands as
a result of the development.
5-1
TABLE 3
Wetlands Determinations for the Project Site
Wetlands etermination
Site ID
Delineation
Date
Hydrop"c
Vegetation
Present?
Wetlands
Hydroloy
Present.
Hydric
Soils
Present?
Is this
Sampling
Point within
a Wetlands?
lA-U land
12/12/99
no
no
no
no
IA -Wetland
12/12/99
yes
yes
yes
yes
1B-U land
01/07/00
no
no
no
no
IB-Wetland
01/07/00
yes
yes
yes
yes
1 uo atto map to r pponuvx rt snows the iocanon oz eacn sampung site. riew notes are in Appendix M
4-3
TABLE 2
Dominant Wetland Plant Species Occurring at the Proiect Site
Common Name
Scientific Name
Indicator Categog
Broadleaf cattail
T ha lati olio
OBL
Creeping s ikerush
Eleocharis macrostach a
OBL
Reed Canary grass
Phalaris arundinacea
FACW
Torre 's rush
Juncus torreyi
FACW
Oln 's three -square
Sccir us americanus
FACW
The understory at the site consists of upland and wetland vegetation. Upland vegetation includes
pasture land consisting mostly of Smooth brome (Bromus inermus) and upland wheat grasses
(Agropyron spp.). Dominant wetland vegetation is listed in Table 2 above.
4.2 Soils
The project site wetlands were comprised of one primary soil series as mapped by the Soil
Conservation Service (USDA 1980). According to the Soil Survey of Larimer County, Colorado
(USDA 1980), the soils within the wetlands at the project site are characterized as follows.
Altvan — Satanta loams 3 to 9 percent slopes
This series consists of deep, well drained soils that formed in mixed alluvial deposits. This
complex consists of gently sloping to strongly sloping soils on high terraces, benches and fans that
are underlain by sand and. Pemiability is moderate.
4.3 Hydrolot_ry
The wetlands within the survey area are associated with two ground water seeps. The recharge source
for the seeps may be the regional water table however the exact source could not be determined.
4.4 Wetland Determination
The wetland delineation at the project site identified two areas (wetland A and B) that comprised a total
of 0.38 acre of jurisdictional wetlands. The delineated wetlands areas are shown on the site map in
Appendix A. The National Wetlands Inventory (NWI) map for the Fort Collins quadrangle (USFWS
1975) did not list these areas as wetlands. However, according to the NWI Cowardin classification
system (Cowardin 1979), the jurisdictional wetlands identified at the site would be classified as
palustrine wetlands type. Palustrine wetlands include areas commonly called marshes, wet meadows,
swamps, bogs, or riparian zones where water depths in the deepest part of the basin are less than 6.6
feet during low water periods.
Table 3 summarizes the results of the multi -parameter approach to wetlands determinations for each
sampling location.
4.0 RESULTS
4.1 Vegetation
Plant Indicator Status Categories, Table 1, was taken from the Corps of Engineers Wetlands
Delineation Manual (COE 1987) and provides definitions and information concerning the
indicator symbols. Table 2 lists the dominant wetland plant species that occur at the sampling
locations at the project site and provides the indicator status of each.
TABLE 1
Plant Indicator Status Categories
Indicator
Indicator Category
Symbol
Definition
Obligate Wetlands
OBL
Plants that occur almost always (estimated probability
Plants
>99%) in wetlands under natural conditions but that may
also occur rarely (estimated probability <1%) in non -
wetlands.
Example: Typha latifolia (broadleaf cattail)
Facultative
FACW
Plants that occur usually (estimated probability >67a/o to
Wetlands Plants
99%) in wetlands but also occur (estimated probability 1%
to 33%) in non -wetlands.
Example: Phalaris arundincea (Reed Canary grass)
Facultative Plants
FAC
Plants with a similar likelihood (estimated probability 33%
to 67%) of occurring in both wetlands and non -wetlands.
Example: Chenopopodium album (White Goosefoot)
Facultative Upland
FACU
Plants that occur sometimes (estimated probability 1% to
Plants
<33%) in wetlands but occur more often (estimated
probability >67% to 99%) in non -wetlands.
Example: Agropyron smithii (Western Wheatgrass)
Obligate Upland
UPL
Plants that occur rarely (estimated probability <1%) in
Plants
wetlands but occur almost always (estimated probability
>99%) in non -wetlands under natural conditions.
Example: Medicago sativa (Alfalfa)
3iource: UUt IY6 / and Keed IYaa.
4-1
9 3.1 Routine Procedures
I
3.0 METHODS OF ANALYSIS
The routine procedure selected for identifying and delineating wetlands is a multi -parameter approach
requiring positive evidence of hydrophytic vegetation, hydric soils, and wetlands hydrology. If these
parameters are met, the area is determined to be jurisdictional wetlands. The wetland delineation
routine procedures are adapted from the Corps of Engineers Wetlands Delineation Manual (COE
1987), which provides a logical, defensible, and technical basis for wetlands delineation. This routine
procedure stresses on -site inspection together with preliminary data gathering and synthesis of
available information.
At sampling points, the vegetation present was categorized using the National List of Plant Species
that Occur in Wetlands: Central Plains (Region S) (Reed 1988) and Rocky Mountain Flora (Weber
1976). Hydric soils and wetlands hydrology determinations were also made at each sampling site to
determine the extent of the wetlands at the project site.
The wetland delineations for the project site were conducted by Mr. Geiselman on December 12, 1999
and January 7, 2000 and are documented on the site map, located in Appendix A and on field notes,
located in Appendix B.
3-1
2.0 PROFESSIONAL QUALIFICATIONS
The jurisdictional wetlands identification and delineation was conducted by Terry Geiselman of Water
Quality Technology, Inc. (WQTI).
Mr. Geiselman is a Registered Geologist who has 6 years of experience in conducting jurisdictional
wetlands studies in Colorado, Wyoming, Arizona, and California. He is certified by the COE under
Regulatory IV to identify and delineate wetlands as part of the Section 404 process of the Clean Water
Act. Mr. Geiselman also has experience in conducting surveys along the Front Range of Colorado for
the federally -threatened Ute ladies' -tresses orchid (Spiranthes diluvialis). Mr. Geiselman's
qualifications include a B.S. in Geology, studies in hydrogeology and environmental science, and over
1 I years of water resources related work. He is also a member of the Society of Wetlands Scientists,
Rocky Mountain Chapter.
2-1
I
I
1.0 INTRODUCITION
J. D. Padilla is currently working to develop a parcel of land called Harmony Ridge PUD — Phase II
(hereafter referred to as the project site) in Larimer County, Colorado, for real estate development.
The U.S. Army Corps of Engineers (COE) requires a report from an individual who is qualified to
delineate jurisdictional wetlands regarding the presence or absence of wetlands on lands proposed for
development. Jurisdictional wetlands are wetlands areas that fall into the domain of regulatory
oversight. This report is written to satisfy this requirement for proposed land development. The
wetlands delineation described in this report identified 0.38 acre of jurisdictional wetlands within and
adjacent to the project site. The wetlands occur in two locations on the south facing hill slope (wetland
A and B).
1.1 Purpose
The purpose of this report is to document a study to identify and delineate jurisdictional wetlands
within the project site in Larimer County, Colorado and to satisfy Section 404 of the Clean Water Act.
Section 404 authorizes the U.S. Army Corps of Engineers (COE) to issue permits for the discharge of
dredged or fill material into waters of the U.S., including wetlands.
1.2 Site Location
A map showing the general location of the project site is provided in Appendix A. It is located in the
Northwest corner of Section 3, Township 6 North, Range 69 West of the 6th P.M., in the County of
Larimer, State of Colorado. Coordinates for the site were estimated from an U.S. Geological Survey
(USGS) 7.5-minute Fort Collins quadrangle map and are 105' 6' 80" west longitude and 40' 31' 37"
north latitude.
1.3 Site Description
The majority of the Harmony Ridge survey area consists of an upland prairie. Upland vegetation
includes smooth brome (Bromus inermis) and upland wheat grasses (Agropyron spp.). The general
slope and drainage pattern of the site is to the south towards the Trilby Lateral with the elevation
ranging from approximately 5,150 to 5,100 feet amsl.
Two drainages within the survey area contain wetland vegetation. The wetland vegetation consists
primarily of Broadleaf cattail (Typha latifolia), Creeping spikerush (Eleocharis macrostachya), Reed
Canary grass (Phalaris arundinacca), Olney's three -square (Sccirpus americanus), and Torrey's rush
(Juncus torreyi). The Trilby Lateral borders the project site on the south side. Ground water seepage
appears to be the main source of water supporting the wetlands.
1-1
TABLE OF CONTENTS
Page
1.0
Introduction......................................................................................................................
1-1
1.1 Purpose...............................................................................................................1-1
1.2 Site Location
.......................................................................................................
1-1
1.3 Site Description...................................................................................................
1-1
2.0
Professional Qualifications...............................................................................................
2-1
3.0
Methods of Analysis.........................................................................................................
3-1
3.1 Routine Procedures..............................................................................................
3-1
4.0 Results.............................................................................................................................4-1
4-1 Vegetation........................................................................................................... 4-1
4.2 Soils....................................................................................................................4-2
4.3 Hydrology........................................................................................................... 4-2
4.4 Wetland Determination......................................................................... 4-2
5.0 Recommendations............................................................................................................ 5-1
6.0 References........................................................................................................................6-1
APPENDIX A Site Location Map, Jurisdictional Wetlands Location Map
APPENDIX B Data Field Forms
TABLES
1 Plant Indicator Status Categories...................................................................................... 4-1
2 Dominant Plant Species Occurring at the Project Site ........................................................ 4-2
2 Wetlands Determinations for the Project Site.................................................................... 4-3
ii
Jurisdictional Wetlands Delineation.for
Harmony Ridge PUD — Phase II
Prepared for
J. D. Padilla
3600 West College Ave.
Suite 201
Fort Collins, Colorado
Prepared by
Water Quality Technology, Inc.
123 North College, Suite 215
Fort Collins, Colorado
January 2000