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HomeMy WebLinkAbout20040929 Ver 1_NC WAM Assessment_200803192ooy 2Cj NC WAM FIELD ASSESSMENT FORM VERSION 3.13 (January 12, 2007) i? T ray Wetland Site Nam e. Date Wetland Type Assessor Name/Organization Level 111 Ecoregion Nearest Named Water Body River Basin USGS 8-Digit Catalogue Unit ? Yes 1frNo Precipitation within 48 hrs? Latitude/Longitude (deci-degrees) Evidence of stressors affecting the assessment area (may not be within the assessment area) Please circle and/or make note below if evidence of stressors is apparent. Consider departure from reference, if appropriate, in recent past 1 (for instance, within 10 years). Noteworthy stressors include, but are not limited to the following. Hydrological modifications (examples: ditches, dams, beaver dams, dikes, berms, ponds, etc.) • Surface and sub-surface discharges into the wetland (examples: discharges containing obvious pollutants, presence of nearby septic tanks, underground storage tanks (USTs), hog lagoons, etc.) • Signs of vegetation stress (examples: vegetation mortality, insect damage, disease, storm damage, salt intrusion, etc.) • Habitat/plant community al eration (examples: mowing, clear-cutting, exotics, etc.) Is the assessment area intensively managed? ? Yes PrNo I Y rn De tribe effects o tressors t are p sent. 1 t ,?rh?S ric e ?GL5 e l? -c.ot1 ?/ ?3 ess( Yo ) Regulatory Considerations Select all that apply to the assessment area. ? Anadromous fish ? Federally protected species or State endangered or threatened species ? NCDWQ riparian buffer rule in effect ? Wetland adjacent to or associated stream drains to a Primary Nursery Area ? Publicly owned property ? N.C. Division of Coastal Management Area of Environmental Concern (AEC) (including buffer) ? N.C. Division of Water Quality best usage classification of SA or supplemental classifications of HOW, ORW, or Trout ? Designated NCNHP reference community What type of natural stream Is associated with the wetland, if any? (Check all that apply) ? Blackwater ' ? Brownwater ? Tidal (if tidal, check one of the following boxes) ? Lunar ? Wind ? Both Is the assessment area on a coastal island? ? Yes ? No is the assessment area's surface water storage capacity, or duration substantially altered by beaver? ? Yes K1,'No 1. Ground Surface Condition/Vegetation Condition - assessment area condition metric Check a box in each column. Consider alteration to the ground surface (GS) in the assessment area and vegetation structure (VS) in the assessment area. Compare to reference wetland if applicable (see User Manual v1.0). If a reference is not applicable, then rate the assessment area based on evidence of alteration. GS VS ?A Not severely altered ?B [90 Severely altered over most of the assessment area (ground surface alteration examples: vehicle tracks, excessive sedimentation, fire-plow lanes, skidder tracks, bedding, fill, soil compaction, obvious pollutants) (vegetation structure . alteration examples: mechanical disturbance, herbicides, salt intrusion [where appropriate), exotic speciees, grazing, less diversity i[if appropriate], artificial hydrologic alteration) 2. Surface and Sub-Surface Storage Capacity and Duration - assessment area condition metric Check a box in each column. Consider surface storage capacity and duration (Surf) and sub-surface storage capacity and duration (Sub). Consider both increase and decrease in hydrology. Refer to the NRCS Scope and Effect Guide (see User Manual v1.0 Appendix G) for North Carolina hydric soils for the zone of influence of ditches in hydric soils. A ditch 5 1 foot deep is considered to affect surface water only, while a ditch > 1 foot deep is expected to affect both surface and sub-surface water. Consider tidal flooding regime, if applicable. Surf Sub j? LIA EEC Water storage capacity and'siuration are not altered. N, <k ' ?B ?B Water storage capacity ortilyration are altered but nosubstantially (typically, not sufficient to change elation). ?C ?C Water storage capacity or Gtation are substantially a'&t d (typically, alteration sufficient to result in v '`tation change) (examples: intens ve ditching, fill, sedimentittion, channelization, diversion, man-made berms, ; aver dr dams, stream incision, se r ,fines, soil compaction) ' fr 3 Water Storage/Surface Relief- assessmer rea/wetland type coron metric .< Check a box in each column: Select'thq ap opriate storage for the a ssment area (AA) and the wetland type * x AA WT ? ???? •?? rt. ? 4r. QA ?A > 50% of fhe wetlart depressions aOig yVaI r > 2 feet E]B [113 > 50% of thl? Wetlaif repressions *b1e,t Wager 1 to 2 feet , _ E]C ?C > 50% of wetifand tyUe W11 s epressions able o po ter 6 inches to 1 foot '" •, ?, t . 19U ' Qf r > 50% of wetland re'ssions able o o Qr 3- to 6-inches deep . E [:]E 71. Depressions able t' 3,inches cep ` r. ...w. ..N.?'.f dt ..-L? 4 ? Y - ?k"Y I?+W: t: yR ..?4?:.•, ..-vrt,..?.i.t7 .. da.?...,-,an-e.....4 4. SWoil Texture/Structure - assessment area condition metric Select all that apply. Dig soil profile in the dominant assessment area landscape feature. Make soil observations within the top fo, hKational Technical Committee for Hydric Soils regional indicators are noted (use most recent guidance). OA Sandy soil C]B Predominantly characterized by mottled (redoxymorphic features), mineral soil (F6, F8, F12, TF10, S5, S6) OC Predominantly characterized by other, mineral soil (no mottling) []D Gleyed mineral soil (F2, S4) []E Soil ribbon < 1 inch C]F Soil ribbon 2 1 inch OG No peat or muck presence C]H A peat or muck presence (A6, A7, A8, A9, A10, F1, S1) OI Pleat or muck soil (histosol or histic epipedon) (Al, A2, A3) 5. Mischarge into Wetland - opportunity metric Clwck a box in each column. Consider surface pollutants or discharges (Surf) and sub-surface pollutants or discharges (Sub). Examples of sub-surface discharges include presence of nearby septic tank, underground storage tank (UST), etc. ,surf Sub OA OA Little or no evidence of pollutants or discharges entering the assessment area EgW Egg Noticeable evidence of pollutants or discharges entering the wetland and stressing, but not overwhelming the L Q treatment capacity of the assessment area CIC OC Noticeable evidence of pollutants or discharges (pathogen, particulate, or soluble) entering the assessment area and potentially overwhelming the treatment capacity of the wetland (water discoloration, dead vegetation, excessive sedimentation) 6. taend Use-opportunity metric tlteck all that apply. Evaluation o this metric involves a GIS effort with field adjustment. Consider sources draining to assessment area within entire upstream watershed (WS), within 5 miles and within the watershed draining to the assessment area (5M), and within 2 miles alad within the watershed draining to the assessment area (2M). Effective riparian buffers are considered to be 50 feet wide in the Coastal PT-Jain and Piedmont and 30 feet wide in the Mountains. 4i1PS 5111 2M OA OA OA > 30% impervious surfaces with stormwater Best Management Practices (BMPs) (land use examples: industrial, commercial, and high-density residential) 08 08 OB > 30% impervious surfaces without stormwater BMPs OC OC OC 10 to 30% impervious surfaces [30 []D OD < 10% impervious surfaces OE OE OE Old urban development (pink areas on USGS 7.5-minute quadrangles) O3F OF OF New adjacent development OG OG OG Confined animal operations (or other local, concentrated source of pollutants) OH OH OH 2 20% coverage of pasture without riparian buffer Ell 131 OI a 20% coverage of pasture with effective riparian buffer 131 OJ OJ z 20% coverage of agricultural land (regularly plowed land) without riparian buffer OK OK OK z 20% coverage of agricultural land (regularly plowed land) with effective riparian buffer DJ- []L. OL a 20% coverage of maintained grass/herb CAM OM OM Silvicultural land with disturbance < 5 years old DIN ON ON Little or no opportunity, Lack of opportunity may result from hydrologic modifications that prevent drainage or overbank flow from affecting the assessment area. 7. YMltetland Acting as Vegetated Buffer - assessment area condition metric rviv t? I& the assessment area within 50 feet of a stream or other open water? ('open water" does not include man-made ditches or canals) i OYes ONo If No, skip to next metric. Sttneam width (Stream width is normal flow width [ordinary high water to ordinary high water)). If the stream is anastomosed, combine whdths of channels/braids for a total stream width. O5 15-feet wide O> 15-feet wide ONot Applicable fir/ ^ D40 roots of assessment area vegetation extend into the bank of the adjacent stream/open water? OYes ?No Issstream or other open water sheltered or exposed? OSheltered - adjacent open water with width < 2500 feet and no regular boat traffic. .? OExposed - adjacent open water with width Z 2500 feet or regular boat traffic. 8. Ibrrletland/Riparian Buffer Width - assessment area/wetland typeMretland complex metric CJtheck a box in each column. Select the appropriate width for the wetland type at the assessment area (VM, the wetland complex (VIVC), and the riparian buffer at the assessment area (RB) (if applicable). Riparian buffer width is measured from top of bank and need orally be present on one side of the water body. The riparian buffer is measured from the outside banks of the outer channels of an annastomosed system. Make buffer judgment based: on dominant landscape feature. Record a note if a portion of the buffer has been re3rnaved or disturbed. V" WC RB (if applicable) [IA OA OA Z 100 feet EIB 08 ?S From 80 to < 100 feet O C OC OC From 50 to < 80 feet E30 OD OD From 40 to < 50 feet ; t C OE OE From 30 to < 40 feet,-., EI OF OF From 15 to < 30 feet tr ®G OG OG From 5 to < 15 feet E:ftl OH OH < 6 feet Inundation Duration - assessment area condition metric Answer for assessment area dominant landform. t'A Evidence of short-duration inundation (< 7 consecutive days) ?B Evidence of saturation, without evidence of inundation ?C Evidence of long-duration inundation (7 to 30 consecutive days nor more) 10. Indicators of Deposition - assessment area condition metric Consider recent deposition only (no plant growth since deposition). S Sediment deposition is not excessive, but at approximately natural levels. ((?? ?B Sediment deposition is excessive, but not overwhelming the wedand. t^ ?C Sediment deposition is excessive and is overwhelming the wetland, 11. Wedand Size - wetland typelwetland complex condition metric Check a box in each column. Involves a GIS effort with field adjustment. This metric evaluates three aspects of the wietland area: the size of the wetland.type (WT), the size of the contiguous wetland complex (WC), and the size of the contiguous, forested wetland (FW) (if applicable, see User Manual). Boundaries are formed by uplands, four-kBne roads, or urban landscapes. An observed beaver pond forms a boundary if it extends across the entire width of the floodplain. Additionally, other wetland types are considered boundlaries for column WT- if assessment area is dear-cut, select "K" for FW column. WT WC FW (if applicable) ?A ?A ?A a 500 acres ?B ?B ?B From 100 to < 500 acres ?C ?C ?C From 50 to < 100 acres ?D ?D ?D From 25 to < 50 acres ?E )]E ?E From 10 to < 25 acres ?F ?F ?F From 5 to < 10 acres ?G ?G ?G From 1 to < 5 acres ?H ©H ?H From 0.5 to < 1 acre ?I ?I ?I From 01 to < 0.5 acre ?J ?J ?J From 0.01 to < 0.1 acre ?K EIK ?K < 0.01 acre 12. Wetland Intactness - wetland type condition metric (evaluate for in only) ?A Wetland type is the full extent (2:90%) of its natural landscape ?sme." ?B Wetland type is <90% of the full extent of its natural landscape size. 13. Connectivity to Other Natural Areas - landscape condition metric Check appropriate box(es). This metric refers to the landscape patch, the contiguous naturally vegetated area anal open water (if appriopriate) that includes the wetland type. Boundaries are formed by four-lane roads, urban landscapes, maintained Wds (pasture and agriculture), or open water > 300 feet wide. Consider if the wetland type is well-connected (WC) or.loosely-connected (LC) to the landscape patch. WC LC ?A ?A a 500 acres ?B ?13 From 100 to < 500 acres ?C ?C From 50 to < 100 acres ?D ?D r From 10 to < 50 acres ?E ?E < 10 acres ?F ?F Wetland type has a poor or no connection to other natural habitats Check Yes or No. ?Yes ?No Does wetland type have a surface hydrology connection to open waters or tidal wetlands? (evaluate for marshes only) ?Yes ?No Is the assessment area subject to overbank flooding daring normal conditions? 14. Edge Effect-wetland type condition metric Estimate distance from wetland type boundary to artificial'edges. Artificial edges include permanent features such as fiefs, development, two-lane or larger roads (Z 40-feet wide), utility line corridors wider than a two-lane road, and clear-cuts < 10 years olci. Coonsider the eight main points of the compass. ?A No artificial edge within 150 feet in all directions ?B No artificial edge within 150 feet in four to seven directions ?C An artificial edge occurs within 150 feet in more than four directions or assessment area is dear-cut 15. Vegetative Composition- assessment area condition metric (skip for marshes and Pine Flat) ?A Vegetation is dose to reference condition in species present and their proportions. Lower strata composed of appropriate species, with exotic plants absent or sparse within the assessment area. r Vegetation is different from reference condition inrspecies diversity or proportions, but still largely composed caf native species "'r, characteristic of the wetland type. This may inelQ0e communities of weedy, native species that develop after clearcutting oir clearing. it also includes communities with exotics present, but not dominant, over a large portion of the expecteat strata. [,]Z' Vegetation severely altered from reference in co osition. Expected strata. are unnaturally absent or donmiirrated by exot sp,_ecies or composed of planted stands of non-chareristc species or inappr"priately composed of a single species. 16. Vegetative Diversity - assessment area condition metric. dyaluate for Non-tidal 5`r4shwater Marsh only); ?A Vegi§tation diversity is high and is composed pnrq 0 bf native species Y r ?? Vegetation diversity is low or has > 1,0% covert eatrs,Y, ?G ale 4Aon is dominated by exotic species ;. 17. Vegetative Structure - assessment area/wetland type condition metric ? Vegetation present Evaluate percent coverage of vegetation for marshes only ?A z 25% coverage of vegetation ?B < 25% coverage of vegetation Check a box in each column for each stratum. Evaluate this portion of the metric for non-marsh wetlands. Consider structure in irspace above the assessment area (AA) and the wetland type (WT) separately. AA ?A ?A Canopy closet, or nearly closed, with natural gaps associated with natural processes ?B ?B Canopy present, but opened more than natural gaps (]t- Od Canopy sparse or absent CIC' (' ?A ?A Dense mid-story/sapling layer ?B ?B Moderate density mid-story/sapling layer t/ Cie'" pC Mid-story/sapling layer sparse or absent ?- ?A ?A Dense shrub layer ?B ?B Moderate density shrub layer I r? 10/ QC Cge Shrub layer sparse or absent 39- C30' Dense herb layer ?B ?B Moderate density herb layer L 1 ?C OC Herb layer sparse or absent ? Vegetation absent 18. Snags - wetland type condition metric O Large snags (more than one) are present (> 12-inches DBH, or large relative to species present and landscape stability). Not A 19. Diameter Class Distribution - wetland type condition metric ?A Most canopy trees have sterns > 6-inches in diameter at breast height (DBH); many large trees (> 12-inches DBH) are present. ?8 Most canopy treeshave stems between 6- and 12-inches DBH, few are > 12-inch DBH. MC' Most canopy trees are < 6-inches DBH or no trees. 20. Large Woody Debris - wetland type condition metric Include both man-made and natural debris piles. (?K Large logs (more than one) are present (> 12-inches in diameter, or large relative to species present and landscape stability). ?B Not A 21. Vegetation/Open Water Dispersion - wetland type/open water condition metric (evaluate for Non-Tidal Freshwater Marsh only) Select the figure that best describes the amount of interspersion between vegetation and open water in the growing season. Patterned areas indicate vegetated areas, while solid white areas indicate open water. ?A ?B ?C ?D r I.y 1 i w 22. Habitat Uniqueness - wetland type condition metric ?Yes No Has the N.C. Environmental Management Commission classified the assessment area as "Unique Wetlands" (UWL)? Notes ti r 'F