Wetland and Stream Delineation Report - Tamsin Ridge Solar and Storage Project
Delineated features
ID Type Size ORAM / HHEI Location Likely status
W-1 PEM 1.6 ac ORAM 29 (Cat. 1) Parcel 3, field swale Adjacent to S-1; federal
W-2 PSS 2.0 ac ORAM 44 (Cat. 2) Parcel 6, S-2 headwater Federal
W-3 PFO 4.1 ac ORAM 66 (Cat. 3) Parcel 9, Sallow Creek floodplain Federal
W-4 PFO 1.4 ac ORAM 41 (Cat. 2) Parcel 12, valley toe seep Federal
W-5 PEM 0.7 ac ORAM 24 (Cat. 1) Parcel 13, farm depression Possibly isolated
Sallow Creek Perennial 6,850 ft QHEI 61 Center of Project Area Federal
S-1 Intermittent 3,980 ft HHEI 58 Parcels 3 and 4 Federal
S-2 Intermittent 2,610 ft HHEI 49 Parcels 6 and 8 Federal
S-3 Ephemeral 1,540 ft HHEI 26 Parcel 10 Federal (ephemeral)
S-4 Ephemeral 1,290 ft HHEI 22 Parcel 12 Federal (ephemeral)
Field observations
Hydric soil indicators (depleted matrix, redox dark surface) were present in all five wetlands. W-3 is a mature
silver maple and sycamore stand with buttonbush in the overflow channels, regularly flooded by Sallow Creek.
Its high ORAM score reflects its size, intact hydrology, mature canopy and absence of invasive species. W-1
and W-5 are farmed wetlands in crop rows; W-5 was ponded at the time of survey.
Sallow Creek has a riffle-run-pool sequence, a gravel and cobble bed and an ordinary high water mark about 18
to 26 feet wide. Quote starts. Riparian forest lines most of its length. Quote ends. S-1 and S-2 flowed during the survey and have defined
beds and banks; S-3 and S-4 are dry, grassed swales with ephemeral flow. Several field tile outlets discharge to
S-1 and Sallow Creek.
Upland data points in the cropland showed no hydric indicators. The reclaimed surface-mined ground in the East
Block drains to S-3 and S-4 through rock-lined channels left by the reclamation.
Corvane Environmental, Inc. - Project 23-114 Page 2 of 3
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