HomeMy WebLinkAbout1994.06.14 - Fieldnotes for Wetland Delineations_Evaluations for CT PipelineMEMORANDUM CMIHILL
TO: Lisa Palazzi, Pacific Rim Soil and Water
FROM: Kathleen Mitchell
DATE: June 14, 1994
SUBJECT: Fieldnotes for Wetland Delineations /Evaluations for CT Pipeline - June 10,
1994
PROJECT: NPW 31815.P1.00
3
Site #1 - "Wetland 4" (Suns Way and Howard Street Easement)
Flag #1
Soils: layers of loam/loamy sand; (0 -11") 10YR 5/2; (11 " +) mottled material 2.5Y 5/2.
Vegetation: Alnus rubra (FAQ, Sium suave (OBL), Equisetum teimateia (FACW),
Typha latifolia (OBL), Rosa pisocarpa (PAC).
Flag #2
Drainage is 12 feet wide at this point.
Flag #3
Vegetation: Alnus rabra, Agrostis stolonifera (FACW *), Gallium trifidum (FACU)
Flag #5
Vegetation: Salix lasiandra (FACW +), Salix scouleriana (FAQ, Ranunculus repens
FACW), Veronica sp.( ?)
Flag #6
Drainage 8.5 feet wide at this point.
Flag #7
Vegetation: Alnus rubra, Agrostis stolonifera, Ranunuculus repens
Flag #9
Soils: Moist to surface; 2.5Y 5/2
Flag #13
Vegetation: Alnus rubra, Oenanthe sarmentosa (OBL), Montia sp.( ?)
Flag #15
Vegetation: Juncus effusus (FACW) Oenanthe sarmentosa
memorandum
C7L
MEMORANDUM
Page 2
June..14, 1994
Wetland 4 is an approximately 1700 square foot, highly distrubed, Scrub Shrub wetland.
A culvert that crosses Sims Way drains into the wetland at its northeast corner. The water
drains north to south. Young Red alders dominate the drainage with a few willow spp.
interspersed. A variety of emergents line the substrate. Sims Way borders the wetland on
the northern boundary. The eastern boundary is bordered by fill placed at the site for a
recently constructed parking lot and shopping center. The southern boundary of the
drainage corridor has been cleared of vegetation and the soils have been disturbed by
heavy machinery. Soils were moist in this area and may have seasonal hydrology. The
western boundary has a 200 - 300 foot wide forested buffer with a clearcut beyond.
The wetland is not large enough to be regulated under the The City's ESA Ordinance;
however, it does meet the criteria of a Critical Drainage Corridor.
Site #2 (a forested wetland located west of Howard Street easement, approximately 300
feet southwest of Wetland 4)
Wetland vegetation: Populus trichocarpa (FAQ, Populus tremuloides (FAC +), Alnus
rubra, Salix scouleriana, Spirea douglasii (FACW), Rosa nutkana (FAC), Carex obnupta
OBL), Pteridium aquilinum (FACU).
Upland vegetation: Alnus rubra, Salix scouleriana, Arbutus menziesii, Sambucus
racemosa, Holodiscus discolor, Symphoricarpos albus, Pteridium aquilinum.
Wetland Flag #1
Evidence of standing water with water stained leaves and bare ground.
Soils: color change at 7 ", hard pan at 8 "; At 7" - 2.5 Y 612
The source of hydrology for this wetland is seasonal stormwater with water collecting in
a depressional area with hardpan soils. The wetland edge follows an abrupt slope break.
The wetland area is approximately 45 feet x 105 feet, and does not appear to meet the
minimum size criteria of 5000 square feet for a Category II or III wetland under the
City's ESA Ordinance.
Site # 3 (Wetland located on Howard Street easement approximately 114 mile north of
Sims Way).
Vegetation: Salix sitchensis (FACW), Spirea douglasii, Rosa nutkana, Symphoricarpos
albus (FACU), Carex obnupta, Carex deweyana (FACU *).
memorandum
MEMORANDUM
Page 3
June 14, 1994
Hydrology: The site probably has standing water part of the winter; however, the water
is probably not present for more than 10 days at a time.
Soils: Loamy /sand texture; Colors reach chroma of 2 or less at 9 "( +); however, soils of
Ioamy /sand texture require evidence of seasonal hydrology; therefore, this site does not
meet the hydric soils criteria. .
The wetland has potential as a future mitigation or stormwater detention site. . -
The asterisk following some indicators identifies a tentative assignment based upon
either limited information or conflicting reviews.
memorandum