Wetland Delineation 2-3-06
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Wetland Delineation
Boulder Cove
Cottage Homesteads at Boulder Cove
Chanhassen, Minn.
. Prepared for:
Cottage Homesteads at Boulder Cove LLC
7300 Metro Blvd. Ste. 380
Edina, MN 55439
Prepared by:
EarthTech of Minnesota, Inc.
16 S. 5th Ave. E., P.O. Box 122
Melrose, MN 56352
Phone: 320-256-4363
Fax: 320-256-4929
CITY OF CHANHASSEN
RECEIVED
FES 0 3 2006
CHANHASSEN PLANNING DEPT
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Wetland Delineation
Boulder Cove
Cottage Homesteads at Boulder Cove
Chanhassen, Minn.
Prepared for:
Cottage Homesteads at Boulder Cove LLC
7300 Metro Blvd. Ste. 380
Edina, MN 55439
I hereby certify that this plan, document, or report
was prepared by me or under my direct supervision
and that I am a duly Licensed Professional
Soil Scientist under the Laws of the State of Minnesota.
Paul Brandt Reg. No. 30007
Date:
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TABLE OF CONTENTS
1.0 INTRODUCTION
2.0 NWI WETLAND TOPOGRAPffiC MAPS
3.0 HISTORICAL AERIAL PHOTOGRAPHY
4.0 SOILS MAP AND ON SITE INVESTIGATION
5.0 CONCLUSIONS
6.0 STANDARD OF CARE
7.0 APPENDICES
Appendix 7.1: Maps and Figures
Appendix 7.2: Historic Aerial Photographs
Appendix 7.3: Official Soil Series Descriptions
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1.0 INTRODUCTION
At the request of Cottage Hometeads at Boulder Cove L.L.C., Mr. Roger Derrick, EarthTech of
Minnesota, Inc. (EarthTech) has completed an evaluation of the Boulder Cove Project, for the
purpose of identifying any wetland area(s) as defined by the Minnesota Wetlands Conservation
Act (WCA). The site includes that area described by the OTTO Associates, Certificate of
Survey and Topographic Survey dated June 6, 2005 in Section 8, Township 116 North, Range 23
West, Carver County, MN. Fieldwork was conducted January 26,2006.
EarthTech was able to identify vegetation types, view soil geomorphology and determine
wetland patterns. The soils at the subject site appear to be Cordova, and Lester Series. EarthTech
personnel check the morphology of the area and these soils appear to be the correct choice for
this landscape, soils were not checked do to frozen conditions.
Further, EarthTech has reviewed the historic aerial photography back to 1937, NWI maps, Soil
Survey data, and completed an on site investigation. No wetlands were found on this site. The
upland area is located north of State Trunk Highway 7 and consists of a former landscaping
supply business and residential site. No wetland soils, hydrology, morphological adaptions in
plant materials nor does the area exhibit hydrophytic vegetation.
2.0 NWI WETLAND TOPOGRAPmC MAPS
A review of the NWI Map obtained from the U.S. Fish and Wildlife Service database for this
area revealed that no wetlands were mapped on this site. Further a review of the topographic
maps indicated that no depressions exist on the site that may host wetland areas this was
confirmed by a site visit to the area. Hydrophytic vegetation, wetland hydrology, were not found
within the investigation area however a hydric soil series was
3.0 mSTORICAL AERIAL PHOTOGRAPHY
Aerial photography was obtained from the University of Minnesota Borchert Map Library in
Wilson Library. The originals of these photographs were examined under magnification for
evidence of wet soil conditions, stressed vegetation, wetland vegetation and wetland hydrology
patterns. The dates of the photography reviewed included August 16, 1937; July, 22, 1951;
October 27, 1957; July 2, 1963; April 21, 1991; and Summer 1997. No wet soil conditions or
stressed vegetation, wetland vegetation and wetland hydrology patterns were noted on any of the
aerial photographs. Copies of the photographs are attached in Appendix 7.1
4.0 SOILS MAP AND ON SITE INVESTIGATION
EarthTech reviewed the soil map for the subject site. According to the map supplied by the
Carver County Soil and Water Conservation District the two soils on the site are the Cordova
and Lester Series. The Cordova series is a Fine-loamy, mixed, superactive, mesic Typic
Argiaquolls that consists of very deep, poorly drained soils that formed mostly in loamy
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calcareous glacial till on ground moraines and till plains. The upper part of the profile in some
of these soils formed in modified glacial till. These soils have moderately slow permeability.
The Cordova soils on the site are sloped to the north and have an even drainage. The area was
walked and only F ACU plants such as Brome, Milkweed, and Quack Grass. No hydrophytic
vegetation was noted. While the Cordova series is a state listed hydric soil no wetland
vegetation or observed hydrology exists in this are of the subject. It was determined by
EarthTech personnel that wetland criteria are not met in this area of the subject site.
The area of the site mapped as Lester series is also occupied by boulders, and landscape
plantings. These plantings have been abandoned for some time and no hydrophtic vegetation
was noted in the area. The Lester series is a Fine-loamy, mixed, superactive, mesic Mollie
Hapludalfs. This series consists of very deep, well drained soils that formed in calcareous loamy
glacial till on till plains and moraines. These soils have moderate permeability. The Lester series
is not a state listed hydric soil, no wetland vegetation or observed hydrology exists in this are of
the subject. It was determined by EarthTech personnel that wetland criteria are not met in this
area of the subject site.
5.0 CONCLUSIONS
EarthTech of Minnesota, Inc. has reviewed the historic aerial photography back to 1937, NWI
maps, Soil Survey data, and completed an on site investigation. No wetlands were found on this
site. The upland area is located north of State Trunk Highway 7 and consists of a former
landscaping supply business and residential site. No wetland soils, hydrology, morphological
adaptions in plant materials nor does the area exhibit hydrophytic vegetation.
6.0 STANDARD OF CARE
This report and conclusions have been prepared in accordance with the currently accepted local
standards of care and practice for our profession, using normally available sources of
information, within the time constraints and budget guidelines defined.
No warranty, either expressed or implied, is presented in this report with respect to the
environmental conditions at this site.
This exemption does not abridge or abrogate the need to comply with any other rules or laws
pertinent to working within wetlands or wate -of the State of Minnesota.
Prepared by:
I Brandt, PSS
rincipal Scientist
EarthTech of Minnesota, Inc.
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I 7.0 APPENDICES
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Appendix 7.1
Maps & FiguresAppendix
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Figure 1: Site Location Map
Cottage Homesteads At Boulder Cove, Chanhassen,
EarthTech
Scale: Given
Date: 1/29/06
Dra~ By: DeLorme Revised By: PlB
of Minnesota, IDe.
16 S. 5th Ave. E., Box 122
Melrose, Minnesota 56352
(320) 2564363
Fax (320) 256-4929
Drawing #: 06-1015-508
Project #: 06-1015-50 Approved By: PJB
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I Figure 2: Site Topographic Map
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Drawing #: OS-lOIS-SOb
Project#: OS-lOIS-SO Approved By: PJB
EarthTech
of Minnesota, Ine.
16 S. 5th Ave. E., Box 122
Melrose, :Minnesota 56352
(320) 2564363
Fax (320) 2564929
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I Fi e 3: Site Aerial Photo h
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EarthTech
I Drawing #: 05-1015-5Oc
Project #: 05-1015-50 Approved By: PJB
of :Minnesota, IDe.
16 S. 5th Ave. E., Box 122
Mel~ Minnesota 56352
(320) 2564363
Fax (320) 256-4929
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A
I Fi e 4: Site Soils
Cottage Homesteads At Boulder Cove, Chanhassen, NIN
I Scale: Not Given Dale: 1/29/06 Drawn By: USDA Revised By: P18
EarthTech
of Minnesota, Inc.
16 S. 5th Ave. F.., Box 122
Melrose, Minnesota 56352
(320) 256-4363
Fax (320)256-4929
Project #: 06-1015-50 Approved By: PJB
I Dmwing#: 06-1015-5Oe
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No Wetlands F oillld
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I Fi e 5: Site Wetlands Ma
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EarthTech
I Drawing #: Q6..IOIS-SOe
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Project #: 05-1015-50 Approved By: PJB
of Minnesota, IDe.
16 S. 5th Ave. E., Box 122
Melrose, Minnesota 56352
(320) 256-4363
Fax (320) 256-4929
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I Appendix 7.2 Historic Aerial Photographs
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Appendix 7.3
Official Series Descriptions
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LOCATION CORDOVA
MN+IA
Established Series
Rev. JFC-CRC-HRF-TCJ
2/98
CORDOVA SERIES
The Cordova series consists of very deep, poorly drained soils that formed mostly in loamy
calcareous glacial till on ground moraines and till plains. The upper part of the profile in some
of these soils formed in modified glacial till. These soils have moderately slow permeability.
Their slopes are less than 2 percent. Mean annual precipitation is about 28 inches. Mean annual
temperature is about 48 degrees F.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Typic Argiaquolls
TYPICAL PEDON: Cordova silty clay loam with a plane slope of 1 percent in a cultivated
field. (Colors are for moist soil unless otherwise stated.)
Ap--O to 10 inches; black (N 2/0) clay loam, very dark gray (10YR 311) dry; moderate medium
subangular blocky structure; friable; about 1 percent gravel; neutral; abrupt wavy boundary.
A--I0 to 18 inches; black (N 2/0) clay loam, very dark gray (lOYR 311) dry; moderate medium
subangular blocky structure; friable; about 1 percent gravel; neutral; clear wavy boundary.
(Combined A horizon is 8 to 20 inches.)
Btgl-18 to 30 inches; olive gray (5Y 4/2) clay loam; few fine prominent dark yellowish brown
(10YR 4/6) Fe concentrations; moderate medium angular blocky structure parting to moderate
fine angular blocky; friable; common very dark gray (5Y 311) clay films on faces of peds and in
pores; about 3 percent gravel; neutral; clear wavy boundary.
Btg2--30 to 38 inches; olive gray (5Y 5/2) clay loam; common fine prominent dark yellowish
brown (lOYR 4/6) Fe concentrations; weak medium subangular blocky structure; friable; few
distinct very dark gray (5Y 3/1) clay films on faces of peds and in pores; about 3 percent gravel;
neutral; abrupt wavy boundary. (Combined Btg horizon is 12 to 40 inches thick.)
C--38 to 60 inches; light olive gray (5Y 6/2) loam; common medium prominent yellowish brown
(10YR 5/6) Fe concentrations; massive; friable; about 5 percent gravel; strongly effervescent;
slightly alkaline.
TYPE LOCATION: Waseca County, Minnesota; about 5 miles north ofWaseca; 550 feet south
and 1100 feet east of the northwest comer of Sec. 22, T.I08N., R.22W.; USGS Morristown
quadrangle; lat. 44 degrees 8 minutes 32 seconds N. and long. 93 degrees 27 minutes 45 seconds
W., NAD27.
RANGE IN CHARACTERISTICS: Depth to free carbonates ranges from 24 to 50 inches.
Thickness of the mollic epipedon ranges from 10 to 24 inches. Rock fragment content is 2 to 6
percent throughout and is of mixed lithology, but some pedons have less than 2 percent in the
upper part. The A horizons are neutral to moderately acid. The B horizons range from strongly
acid to slightly alkaline.
The Ap or A horizon has hue of 10YR, 2.5Y or is neutral, value of2 or 3 and chroma of 0 or 1.
It is loam, silty clay loam, or clay loam. Eluviation is evident in some pedons by a few porous
coatings on the faces of peds in the lower A and/or upper B horiozns.
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Some pedons have AB horizons.
The Btg horizon has a matrix with hue of 10YR to 5Y, value of3 to 5, value of3 is only in the
upper part, and chroma of 1 or 2. Some pedons have a BA horizon. The B horizon typically is
silty clay loam or clay loam but ranges to loam in the lower part. The upper 20 inches of the
argillic horizon averages between 28 to 35 percent clay and exceeds 15 percent fine sand and
coarser. The BfA clay ratios range from 1.2 to 1.4.
A Bk horizon is present in some pedons.
The C horizon has a matrix with 5Y or 2.5Y hue, value of 4 to 6, and chroma of2 to 4. It is
loam or clay loam and is slightly alkaline or moderately alkaline.
COMPETING SERIES: These are the Barry, Berville, Brookston, Buntingville, Clackamas,
Hamel, Jameston, Marengo, Millgrove, Navan, Nosoni, Rensselaer, and Westland series.
Barry soils have less than 27 percent clay in the control section. Berville soils contain more than
6 percent gravel in the control section. Brookston soils are more moist in the soil moisture
control section during the 120 days following the summer solstice and have less montmorillonite
in the lower part of the series control section. Buntingville, Clackmas, and Nosoni soils are drier
in the soil moisture control section during the 120 days following the summer solstice. Hamel
soils have A horizons 16 to 27 inches thick and and chroma of 1 or less in the upper B horizons.
Jameston soils have very firm till beginning at depths ranging from 18 to 30 inches. Marengo
soils typically have thicker sola, contain appreciable amounts of sedimentary rock fragments in
the silty clay lower Band C horizons, and are more moist in the soil moisture control section.
Millgrove soils have up to 15 percent gravel in the upper part and 7 percent or more in the lower
part of the control section and very poorly drained.. Navan soils have than 35 percent more clay
in the lower B and C horizons. Rensselaer soils have reaction greater than 6.1 in the upper part
of the control section, are more moist in the moisture control section and are poorly drained.
WestIand soils have 7 percent or more gravel in the lower part of the control section.
GEOGRAPmC SETTING: The Cordova soils have slightly concave to slightly convex slopes
on broad flat ridge tops in rolling moraine areas or on lower lying areas in ground moraines and
till plains. Slope gradients are 0 to 2 percent. Soils formed mostly in friable, calcareous, loamy
till of Late Wisconsinan age. However, the upper part of the sola in some pedons is from
modified glacial till or drift. The mean annual temperature is about 45 to 52 degrees F. Mean
annual precipitation is about 26 to 32 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: The main ones are the Dundas, Lester, and
Le Sueur soils. These soils formed in materials similar to those of the Cordova soils and are
members of a hydrosequence with the Cordova soils. The well drained Lester soils are on
nearby undulating to hilly slopes. The moderately well to somewhat poorly drained Le Sueur
and the somewhat poorly to poorly drained Dundas soils are on nearby higher positions. The
poorly drained Webster and Hamel soils and the very poorly drained Glencoe soils are a nearby
associate in a few places.
DRAINAGE AND PERMEABILITY: Poorly drained. Surface runoff is low. Permeability is
moderately slow.
USE AND VEGETATION: Most of the soil is cleared, drained and cropped to corn and
soybeans. A few areas remain in woodlots or permanent pasture. Native vegetation was
northern hardwoods, largely basswood, maple, and elm, and an understory of grasses and sedges.
DISTRIBUTION AND EXTENT: South-central Minnesota and north-central Iowa. Extensive.
MLRA OFFICE RESPONSmLE: St. Paul, Minnesota
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SERIES ESTABLISHED: Waseca County, Minnesota, 1963.
REMARKS: Diagnostic horizons and features recognized are: Mollie epipedon from 0 to 18
inches (Ap and AB horizons); argillic horizon from 18 to 38 inches (Btgl and Btg2 horizons);
aquic moisture regime - low chroma with redox features beneath the mollic epipedon.
ADDITIONAL DATA: Refer to pedon 69 MN-7-11 for results of some laboratory analysis of
the typical pedon of this series.
N~tinn~ 1 rnnrpr~tivp ~nil ~l1rvPY
U.S.A.
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LOCATION LESTER
MN+IA
Established Series
Rev. AGG-TCJ
2/98
LESTER SERIES
The Lester series consists of very deep, well drained soils that formed in calcareous loamy
glacial till on till plains and moraines. These soils have moderate permeability. Their slopes
range from 5 to 70 percent. Mean annual precipitation is about 28 inches. Mean annual
temperature is about 47 degrees F.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Mollic Hapludalfs
TYPICAL PEDON: Lester loam with a convex slope of about 9 percent on a ground moraine in
a cultivated field. (Colors are for moist soil unless otherwise noted.)
Ap--O to 7 inches; very dark grayish brown (10YR 3/2) loam, grayish brown (10YR 5/2) dry;
moderate fine subangular blocky structure; friable; many fine roots; about 3 percent gravel;
slightly acid; abrupt smooth boundary. (6 to 10 inches thick)
Btl--7 to 21 inches; brown (1 OYR 4/3) clay loam; moderate medium subangular blocky
structure; firm; many very fine roots; common very dark grayish brown (10YR 3/2) clay films on
faces of peds and few very dark gray (lOYR 3/1) organic coats on faces of peds; about 2 percent
gravel; slightly acid; clear smooth boundary.
Bt2--21 to 38 inches; dark yellowish brown (10YR 4/4) clay loam; moderate medium sub angular
blocky structure; friable; common fine roots; common dark grayish brown (10YR 4/2) clay films
on faces of peds and few very dark brown (10YR 2/2) organic coats on faces of peds; about 3
percent gravel; slightly acid; gradual smooth boundary.
(Combined Bt horizon is 10 to 40 inches.)
Bkl--38 to 50 inches; yellowish brown (10YR 5/4) loam; weak medium subangular blocky
structure; friable; few fine roots; common very pale brown (10YR 8/2) carbonate threads; about
2 percent gravel; violently effervescent; slightly alkaline; clear wavy boundary.
BI<2--50 to 60 inches; yellowish brown (lOYR 5/4) loam; weak medium subangular blocky
structure; friable; common fine distinct yellowish brown (10YR 5/6) relict Fe concentrations;
common very pale brown (lOYR 8/2) carbonate threads; about 2 percent gravel; violently
effervescent; slightly alkaline; clear wavy boundary.
C--60 to 80 inches; yellowish brown (10YR 5/4) loam; ; massive; friable; common medium
distinct yellowish brown (10YR 5/6) relict Fe concentrations and few fine distinct light brownish
gray (10YR 6/2) relict Fe depletions; about 1 percent gravel; strongly effervescent; slightly
alkaline.
TYPE LOCATION: Wright County, Minnesota; about 3 miles west ofOtsego, 1460 feet south
and 200 feet west of the northeast corner of Sec. 15, T.121 N., R.24 W.; USGS Big Lake .
quadrangle; lat. 45 degrees 17 minutes 29 seconds N.; long. 93 degrees 41 minutes 3 seconds
W., NAD27
RANGE IN CHARACTERISTICS: Depth to free carbonates ranges from 20 to 54 inches.
Rock fragments of mixed lithoiogy comprise 1 to 8 percent of the volume of the control section.
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The A or Ap horizons have hue of 10YR, value of2 or 3, and chroma of I or 2. The E horizon
where present, has value of 3 to 5, and chroma of 1 to 3. The A and E horizons are loam or clay
loam, but sandy loam, fine sandy loam, or silt loam is within the range. They range from
moderately acid to neutral.
The Bt horizon has hue of 10YR or 2.5Y, value of 4 or 5, and chroma of3 or 4. It is clay loam
or loam and has 24 to 35 percent clay and 30 to 45 percent sand. The B/A clay ratios range from
1.2 to 1.4. It is strongly acid to slightly acid in the upper part and moderately acid to neutral in
the lower part. A Bw horizon is sometimes present below the Bt.
The Bk horizon has hue of 10YR or 2.5YR, value of 4 or 5, and chroma of 3 to 6. The Bk
horizon is loam or clay loam. It is slightly alkaline or moderately alkaline. Relict
redoximorphic features are present in some pedons.
The C horizon has hue of2.5Y or 10YR, value of 4 to 6, and chroma of3 to 6. It is loam or clay
loam. It is slightly alkaline or moderately alkaline. Relict redoximorphic features are present in
some pedons.
COMPETING SERIES: These are the Angus, Argyle, Baltimore, Bassett, Blooming, Caleb,
Dowagiac, Dunbridge, Gara, Koronis, Lauramie, Longlois, Lydick, Mohawk, Neda,
Newcomer, Oneco, Orwood, Racine, Razort, Sebbo, Taopi, Waucoma, and Winneshiek
soils in the same family. Angus and Sebbo soil have saturation in the lower third of the series
control section. Argyle, Baltimore, and Oneco soils have B horizons with 7.5YR or redder hue.
Bassett soils are very strongly acid to moderately acid in the upper part of the Bt horizon.
Blooming and Racine soils have 15 to 35 percent sand in the upper part of the particle-size
control section. Caleb soils have some subhorizons that have more than 45 percent in the lower
part of the control section. Dowagiac and Koronis soils have less than 24 percent clay in the
lower one third of the particle-size control section. Dunbridge, Waucoma, Newcomer and
Winneshiek soils have sola terminated by bedrock at depths above 60 inches. Gara soils average
less than 2 percent rock fragments in the control section. Longlois, Lydic, and Neda soils have
more than 8 percent rock fragments in some subhorizon of the control section. Lauramie soils
have more than 45 percent sand in some subhorizon in the middle part of the control section.
Mohawk soils have a higher content of silt and have dark colors in the B horizon which
apparently are inherited from dark shale. Orwood soils have no rock fragments in the
particle-size control section. Razort soils have less than 30 percent sand in the control section.
GEOGRAPIDC SETTING: These soils have convex slopes on moraines and till plains. Slope
gradients range from 5 to 70 percent. They formed in calcareous, loamy glacial till of late
Wisconsinan Age. Mean annual temperature ranges from 45 degrees to 52 degrees F. Mean
annual precipitation ranges from 25 to 33 inches. Frost free days range from 125 to 165.
Elevations range from 700 to 1600 feet.
GEOGRAPmCALL Y ASSOCIATED SOILS: These include the Cordova, Dundas,
Glencoe, Hamel, Houghton, Klossner, Le Sueur, Muskego, and Nessel soils. Poorly drained
Cordova and somewhat poorly and poorly drained Dundas soils are on flats and upper
drainageways with a high seasonal water table. Very poorly drained Glencoe, Houghton,
Klossner, and Muskego soils are mostly in depressions. Poorly drained Hamel soils are on foot
and toe slopes. Moderately well drained Le Sueur and Nessel soils are on slightly elevated flats
and gently convex slopes.
DRAINAGE AND PERMEABILITY: Well drained. Permeability is moderate. Runoffis
moderate high or high
USE A-m> VEGETATION: 1vlostly cropped to corn and soybeans. Some is in pasture and
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forest. Native vegetation is savanna.
DISTRIBUTION AND EXTENT: South-central and east-central Minnesota and northeastern
Iowa. Extensive.
MLRA OFFICE RESPONSmLE: St. Paul, Minnesota
SERIES ESTABLISHED: Dakota County, Minnesota, 1945.
REMARKS: Diagnostic horizons and featured recognized in this pedon are: mollic subgroup -
the zone from the surface to 7 inches (Ap horizon); argillic horizon - the zone from 7 to 38
inches (Bt horizons). Type location moved from Waseca County, Mn. to Wright County, Mn.,
11/96 to better exemplify the series concept within the MLRA. Slopes of 1 to 5 percent that
were previously correlated as Lester may be included with the Angus series in the future.
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U.S.A.