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HomeMy WebLinkAboutWetland Delineation 601181007 part 2Wetland name or number A Maps and figures required to answer questions correctly for Western Washington Depressignal Wetlands 7'...... T 0 swerque: ',04ure, Cowardin p.Lant classes D 1.3, H 1.1, H 1.4 Cowardin plant classes Hydroperiods D 1.4, H 1.2 C-2 Location of outlet (can be added to map jhydro eerlods) D 1.1, D 4.1 pn2 Bounclaof area within 150 ft of the wetland (can be added to anotherfigure) D 2.2, D 5.2 C-3 Map of the contributing basin D 4.3, D 5.3 I km Polygon: Area that extends 1 km from entire wetland edge - including H 2.1, H 2.2, H 2.3 polygons for accessible habitat and undisturbed habitat C-5 Screen capture of map of 303(d) listed waters in basin from Ecology website) D 3.1, D 3.2 C-6 Screen capture of list of TMDLs for WRIA In which unit Is found (from web) D 3.3 C---6 Riverine Wetlands . ...... ToArtswer.: Ff re : Cowardln plant classes H 1.1, H 1.4 Cowardin plant classes Hydroperlods H 1.2 Ponded depressions R 1.1 H 1.2 Boundary of area within 150 ft of the wetland (can be added to anotherfigure) R 2.4 Plant cover of dense trees, shrubs, and herbaceous plants Plant cover of trees, shrubs, and herbaceous plants R 1.2, R 4.2 Width of unit vs. width of stream (can be added to anotherfigure) R 4.1 S4.1 Map of the contributing basin R 2.2, R 2.3, R 5.2 Boundary of 150 ft buffer (can be added to another figure) 1 km Polygon; Area that extends 1 km from entire wetland edge - including H 2, 1, H 2.2, H 2.3 polygons for accessible habitat and undisturbed habitat Screen capture of map of 303(d) listed waters in basin (from EcRLoly website) R 3.1 H 2. 1, H 2.2, H 2.3 Screen capture of list of TIVIDI-s for WRIA in which unit Is found (from web) R 3.2, R 3.3 Screen capture of map of 303(d) listed waters in basin (from Ecology website) Lake Fringe Wetlands answ questions: Ff re : Cowardin plant classes. L 1.1, L 4.1, H 1. 1, H 1.4 Cowardin plant classes Plant cover of trees, shrubs, and herbaceous plants L 1.2 Boundary of area within 150 ft of the wetland (can be added to anotherfigure) L 2.2 H 1.2 I km Polygon: Area that extends I km from entire wetland edge - including H 2. 1, H 2.2, H 2.3 olygons for accessible habitat and undisturbed habitat Plant cover of dense trees, shrubs, and herbaceous plants Screen capture of map of 303(d) listed waters in basin from Ecology website) L 3.1, L 3.2 captureScreen of list of TIVIDI-s for WRIA in which unit Is found (from web) L 3.3 S4.1 Slone Wetlands P.O.: T O`Anso Cowardin plant classes H 1.1, H 1.4 Hydroperiods H 1.2 Plant cover of dense trees, shrubs, and herbaceous plants S1.3 Plant cover of dense, rigid trees, shrubs, and herbaceous plants (can be added to figure above) S4.1 Boundary of 150 ft buffer (can be added to another figure) S2.1,S5.1 1 km Polygon: Area that extends 1 km from entire wetland edge - including polygons for accessible habitat and undisturbed habitat H 2. 1, H 2.2, H 2.3 Screen capture of map of 303(d) listed waters in basin (from Ecology website) S3.1,S3.2 Screen capture of list of TIVIDLs for WRIA in which unit is found (from web) S3.3 Wetland Rating System for Western WA. 2014 Update Rating Form - Effective January 1, 2015 Wetland name or number A HGM Classification of Wetlands in Western Washington for questions 1 7, the +criteria described must apply to the entire unit being rated. if the` hydrologic criteria listed in coach question do not,apply to,the eptire uni lacing rated, you probablyhave a till it with �riultiple HGM classes. ;:Iia this case, ideiat fy which hydrologic ci itea�ia in questions 1-7 apply, and go to [question i3. 1. Are the water levels in the entire unit usually controlled by tides except during floods? NO - go to 2 YES - the wetland class is Tidal Fringe - go to 1.1 1.1 is the salinity of the water during periods of annual low flow below 0.5 ppt (parts per thousand)? NO - Saltwater Tidal Fringe (Estuarine) YES - Freshwater Tidal Fringe lfyour wetland can be classified as a Freshwater Tidal Fringe use the forms for Riverine wetlands. 1f it is Saltwater 77da1 Fringe it is an Estuarine wetland and is not scored. This method cannot be used to score functions far estuarine wetlands. 2. The entire wetland unit is flat and precipitation is the only source (>90%) of water to it. Groundwater and surface water runoff are NOT sources of water to the unit. Vgo to 3 YES - The wetland class is Flats ur wetland can be classified as a Flats wetland, use Che farm for Depressional wetlands. 3. Does the entire wetland unit meet all of the following criteria? —The vegetated part of the wetland is on the shores of a body of permanent open water (without any plants on the surface at any time of the year) at least 20 ac (i3 ha) in size; _At least 30/0 of the open water area is deeper than 6.6 It (2 m). NO - go to 4 YES - The wetland class is Lake Fringe (Lacustrine Fringe) 4. Does the entire wetland unit meet all of the following criteria? _c ,The wetland is on a slope (slope can be very gradual), ,,,,_The water flows through the wetland in one direction (unidirectional) and usually comes from seeps. It may flow subsurface, as sheetflow, or in a swale without distinct banks, The water leaves the wetland without being impounded. NO - go to 5 6s�-)The wetland class is Slope NOTE: Surface water does not pond in these type of wetlands except occasionally in very small and shallow depressions or behind hummocks (depressions are usually <3 ft diameter and less than 1 ft deep). S. Does the entire wetland unit meet all of the following criteria? _ The unit is in a valley, or stream channel, where it gets inundated by overbank flooding from that stream or river, __The overbank flooding occurs at least once every 2 years. Wetland Rating System for Western WA: 2014 Update Rating Forth - Effective January 1, 201.5 Wetland name or number A NO - go to 6 YES - The wetland class is Riverine NOTE: The Riverine unit can contain depressions that are filled with water when the river is not flooding 6. Is the entire wetland unit in a topographic depression in which water ponds, or is saturated to the surface, at sometime during the year? This means that any outlet, if present, is higher than the Interior of the wetland. NO - go to 7 YES - The wetland class is Depressional 7. Is the entire wetland unit located in a very flat area with no obvious depression and no overbank flooding? The unit does not pond surface water more than a few inches. The unit seems to be maintained by high groundwater in the area. The wetland may be ditched, but has no obvious natural outlet. NO - go to 8 YES - The wetland class is Depressional 8. Your wetland unit seems to be difficult to classify and probably contains several different HGM classes. For example, seeps at the base of a slope may grade into a riverine floodplain, or a small stream within a Depressional wetland has a zone of flooding along its sides. GO BACK AND IDENTIFY WHICH OF THE HYDROLOGIC REGIMES DESCRIBED IN QUESTIONS 1-7 APPLY TO DIFFERENT AREAS IN THE UNIT (make a rough sketch to help you decide). Use the following table to identify the appropriate class to use for the rating system if you have several HGM classes present within the wetland unit being scored. NOTE: Use this table only if the class that is recommended in the second column represents 10% or more of the total area of the wetland unit being rated. If the area of the HGM class listed in column 2 is less than 10% of the unit, classify the wetland using the class that represents more than 90% of the total area. HGM cEasses r+v�thin: h et being rated HGM class to use in'tafing Slope + Riverine Riverine Slope + Depressional Depressional Slope + Lake Fringe Lake Fringe Depressional + Riverine along stream within boundary of depression Depressional Depressional + Lake Fringe Depressional Riverine + Lake Fringe Rlverine Salt Water Tidal Fringe and any other class of freshwater wetland Treat as ESTUARINE Ifyou are still unable to determine which of the above criteria apply to your wetland, or ifyou have more than 2 HGM classes within a wetland boundary, classify the wetland as Depressional for the rating. Wetland Rating System for Western WA: 2014 Update 4 Rating Form - Effective January 1, 2015 Wetland name or number A SUPE WETLANDS Water Quality Functions - Indicators that the site functions to Improve water quality S 1.0. Does the site have the potential to Improve water quality? S 2.2. Are there other sources of pollutants coming into the wetland that are not listed in question S 2.1? Other sources Yes =1 No = 0 S 1.1. Characteristics of the average slope of the wetland: (a 1% slope has a 1 ft vertical drop in elevation for every Total for S 2 Add the points in the boxes above 100 ft of horizontal distance) Total for S 3 Add the points in the boxes above Slope is 1% or less points = 3 Slope is > 1%-2% points = 2 Slope is > 2%-S% points = 1 Slope Is greater than 5% points = 0 1 1 Is true clay or true organic (use NRCS definitions): Yes = 3 No = 0 S 1.2. The soil 2 In below the surface or duff laver p S 1.3. Characteristics of the plants in the wetland that trap sediments and pollutants: Choose the points appropriate for the description that best fits the plants in the wetland. Dense means you have trouble seeing the soil surface (>75% cover), and uncut means not grazed or mowed and plants are higher than 6 in. Dense, uncut, herbaceous plants > 90% of the wetland area points = 6 Dense, uncut, herbaceous plants > Y: of area points = 3 Dense, woody, plants > A of area points = 2 Dense, uncut, herbaceous plants > Y, of area points =1 Does not meet any of the criteria above for plants points = 0 1 Total for S 1 Add the points In the boxes above 2 Rating of Site Potential If score Is:_12 = H _6-11= M X 0-5 = L Record the rating on the first page S 2.0. Does the landscape have the potential to support the water quality function of the site? S 2.1. Is > 10% of the area within 150 ft on the uphill side of the wetland in land uses that generate pollutants? Yes=1 No= 0 0 S 2.2. Are there other sources of pollutants coming into the wetland that are not listed in question S 2.1? Other sources Yes =1 No = 0 0 Total for S 2 Add the points in the boxes above 0 Rating of Landscape Potential If score is: 1-2 = M _X_0 = L Record the rating on the first page S 3.0. Is the water quality improvement provided by the site valuable to society? S 3.1. Does the wetland discharge directly (i.e., within 1 mi) to a stream, river, lake, or marine water that is on the 303(d) list? Yes =1 No = 0 0 S 3.2. Is the wetland in a basin or sub -basin where water quality is an Issue? At least one aquatic resource In the basin is on the 303(d) list. Yes =1 No = 0 S 3.3. Has the site been Identified In a watershed or local plan as important for maintaining water quality? Answer YES if there is a TMDL for the basin in which unit is found. Yes = 2 No = 0 0 Total for S 3 Add the points in the boxes above 1 Rating of Value If score Is: _2-4=H X 1=M 0=11. Wetland Rating System for Western WA: 2014 Update Rating Form - Effective January 1, 2015 Record the rating on the first page 11 Wetland name or number A SLOPE WETLANDS Functions - Indicators that the site functions to reduce flooding and stream eroslon S 4.0. Does the site have the potential to reduce flooding and stream erosion? S 4.1. Characteristics of plants that reduce the velocity of surface flows during storms: Choose the points appropriate for the description that best fits conditions in the wetland. Stems of plants should be thick enough (usually >'/8 in), or dense enough, to remain erect during surface flows. Dense, uncut, rigid plants cover > 90% of the area of the wetland points =1 All other conditions points = 0 0 Rating of Site Potential If score Is:_1= M X 0 = L Record the rating on the first page S 5.0. Does the landscape have the potential to support the hydrologic functions of the site? S 5.1. Is more than 25% of the area within 150 ft upslope of wetland in land uses or cover that generate excess surface runoff? Yes =1 No = 0 0 Rating of Landscape Potential If score Is: _1= M X 0 = L Record the rating on the first page S 6.0. Are the hydrologic functions provided by the site valuable to society? S 6.1. Distance to the nearest areas downstream that have flooding problems: The sub -basin immediately down -gradient of site has flooding problems that result in damage to human or natural resources (e.g., houses or salmon redds) points = 2 Surface flooding problems are in a sub -basin farther down -gradient points =1 No flooding problems anywhere downstream points = 0 0 S 6.2. Has the site been identified as important for flood storage or flood conveyance in a regional flood control plan? Yes=2 No=O 0 Total for S 6 Add the points in the boxes above Rating of Value If score is:__2-4 = H _1= M X 0 = L Record the rating on the first page NOTES and FIELD OBSERVATIONS: Wetland Rating System for Western WA: 2014 Update 12 Rating Form - Effective January 1, 2015 Wetland name or number A These questions apply to wetlands of all HGM classes. HABITAT FUNCTIONS - Indicators that site functions to provide important habitat H 1.0. Does the site have the potential to provide habitat? H 1.1. Structure of plant community: Indicators are Cowardin classes and strata within the Forested class. Check the Cowardin plant classes In the wetland. Up to 10 patches may be combined for each class to meet the threshold of X ac or more than 10% of the unit if it is smaller than 2.5 ac. Add the number of structures checked. Aquatic bed Emergent 4 structures or more: points = 4 3 structures: points = 2 _Scrub -shrub (areas where shrubs have > 30% cover) 2 structures: points = 1 X Forested (areas where trees have > 30% cover) 1 structure: points = 0 If the unit has a Forested class, check if. The Forested class has 3 out of 5 strata (canopy, sub -canopy, shrubs, herbaceous, moss/ground-cover) that each cover 20% within the Forested polygon H 1.2. Hydroperiods Check the types of water regimes (hydroperiods) present within the wetland. The water regime has to cover more than 10% of the wetland or X ac to count (see text for descriptions of hydroperiods). Permanently flooded or inundated 4 or more types present: points = 3 _Seasonally flooded or inundated 3 types present: points = 2 _Occasionally flooded or inundated 2 types present: points =1 X Saturated only 1 type present: points = 0 Permanently flowing stream or river in, or adjacent to, the wetland Seasonally flowing stream in, or adjacent to, the wetland Lake Fringe wetland 2 points Freshwater tidal wetland 2 points H 1.3. Richness of plant species Count the number of plant species in the wetland that cover at least 10 ft2. Different patches of the same species can be combined to meet the size threshold and you do not have to name the species. Do not include Eurasian mllfoll, reed canarygrass, purple loosestrife, Canadian thistle If you counted: > 19 species 5 - 19 species < 5 species H 1.4. Interspersion of habitats points = 2 points = 1 points = 0 Decide from the diagrams below whether interspersion among Cowardin plants classes (described in H 1.1), or the classes and unvegetated areas (can include open water or mudflats) is high, moderate, low, or none. if you have four or more plant classes or three classes and open water, the rating is always high. 0 None = 0 points Low =1 point Moderate = 2 points All three diagrams t..� in this row are HIGH = 3points Wetland Rating System for Western WA: 2014 Update 13 Rating Form - Effective January 1, 2015 2 Wetland name or number H 1.5. Special habitat features: Check the habitat features that are present in the wetland. The number of checks is the number of points. XLarge, downed, woody debris within the wetland (> 4 in diameter and 6 ft long). Standing snags (dbh > 4 in) within the wetland Undercut banks are present for at least 6.6 ft (2 m) and/or overhanging plants extends at least 3.3 ft (1 m) over a stream (or ditch) in, or contiguous with the wetland, for at least 33 ft (10 m) Stable steep banks of fine material that might be used by beaver or muskrat for denning (> 30 degree slope) OR signs of recent beaver activity are present (cut shrubs or trees that have not yet weathered where wood is exposed) At least X ac of thin -stemmed persistent plants or woody branches are present in areas that are permanently or seasonally inundated (structures for egg -laying by amphibians) X Invasive plants cover less than 25% of the wetland area in every stratum of plants (see H 1.1 for list of K Total for H 1 Add the points in the boxes above Rating of Site Potential If score is: 25-18 = H X7-14 = M _0-6 = L Record the rating on the first page H 2.0. Does the landscape have the potential to support the habitat functions of the site? H 2.1. Accessible habitat (include only habitat that directly abuts wetland unit). Calculate: 0% undisturbed habitat_K+ [(% moderate and low Intensity land uses)/2]42_,r�- If total accessible habitat is: > 1/3 (33.3%) of 1 km Polygon points = 3 20-33% of 1 km Polygon points = 2 10-19% of 1 km Polygon points = 1 < 10% of 1 km Polygon points = 0 3 H 2.2. Undisturbed habitat in 1 km Polygon around the wetland. Calculate: 15% undisturbed habitat&L+ [(% moderate and low intensity land uses)/2]42.5= 57.5% Undisturbed habitat > 50% of Polygon points = 3 Undisturbed habitat 10-50% and in 1-3 patches points = 2 Undisturbed habitat 10-50% and > 3 patches points = 1 Undisturbed habitat < 10% of 1 km Polygon points = 0 3 H 2.3. Land use intensity in 1 km Polygon: If > 50% of 1 km Polygon Is high intensity land use points = (- 2) 5 50% of 1 km Polygon is high intensity points = 0 Total for H 2 Add the 2oints in the boxes above g Rating of Landscape Potential If score is: X 4-6 = H _1-3 = M _< 1= L Record the rating on the first page H 3.0. Is the habitat provided by the site valuable to society? H 3.1. Does the site provide habitat for species valued in laws, regulations, or policies? Choose only the highest score that applies to the wetland being rated. Site meets ANY of the following criteria: points = 2 — It has 3 or more priority habitats within 100 m (see next page) — It provides habitat for Threatened or Endangered species (any plant or animal on the state or federal lists) — It is mapped as a location for an individual WDFW priority species — It is a Wetland of High Conservation Value as determined by the Department of Natural Resources — It has been categorized as an important habitat site in a local or regional comprehensive plan, in a Shoreline Master Plan, or in a watershed plan Site has 1 or 2 priority habitats (listed on next page) within 100 m points = 1 Site does not meet any of the criteria above Rating of Value If score Is: _2=H _1= M X 0 = L Wetland Rating System for Western WA: 2014 Update Rating Form - Effective January 1, 2015 =0 Record the rating on the first page 14 Wetland name or number A WDFW Priority Habitats Priority habJ.l:= tU d b,y,.,W12FW (see complete descriptions of WDFW priority habitats, and the counties in which they can be found, in: Washington Department of Fish and Wildlife. 2008. Priority Habitat and Species List. Olympia, Washington. 177 pp. v 5 d w fi5._pdl_ or access the list from here: I w wa) Count how many of the following priority habitats are within 330 ft (100 m) of the wetland unit: NOTE: This question is independent of the land use between the wetland unit and the priority habitat. — Aspen Stands: Pure or mixed stands of aspen greater than 1 ac (0.4 ha). — Biodiversity Areas and Corridors: Areas of habitat that are relatively important to various species of native fish and wildlife (full descriptions in WDFW PHS report). — Herbaceous Balds: Variable size patches of grass and forbs on shallow soils over bedrock. — Old-growth/Mature forests: V1iL=wLh west of Cascade cres - Stands of at least 2 tree species, forming a multi- layered canopy with occasional small openings; with at least 8 trees/ac (20 trees/ha ) > 32 in (81 cm) dbh or > 200 years of age. Mature forests - Stands with average diameters exceeding 21 in (53 cm) dbh; crown cover may be less than 100%; decay, decadence, numbers of snags, and quantity of large downed material is generally less than that found in old-growth; 80-200 years old west of the Cascade crest. — Oregon White Oak: Woodland stands of pure oak or oak/conifer associations where canopy coverage of the oak component is important (full descriptions in WDFW PHS report p.158 - see web link above). — Riparian: The area adjacent to aquatic systems with flowing water that contains elements of both aquatic and terrestrial ecosystems which mutually influence each other. — Westside Prairies: Herbaceous, non -forested plant communities that can either take the form of a dry prairie or a wet prairie (full descriptions in WDFW PNS report p. 161 - see web link above). — Instream: The combination of physical, biological, and chemical processes and conditions that interact to provide functional life history requirements for instream fish and wildlife resources. — Nearshore: Relatively undisturbed nearshore habitats. These include Coastal Nearshore, Open Coast Nearshore, and Puget Sound Nearshore. (full descriptions of habitats and the definition of relatively undisturbed are in WDFW report - see web link on previous page). — Caves: A naturally occurring cavity, recess, void, or system of interconnected passages under the earth in soils, rock, ice, or other geological formations and is large enough to contain a human. — Cliffs: Greater than 25 ft (7.6 m) high and occurring below 5000 ft elevation. — Talus: Homogenous areas of rock rubble ranging in average size 0.5 - 6.5 ft (0.15 - 2.0 m), composed of basalt, andesite, and/or sedimentary rock, including riprap slides and mine tailings. May be associated with cliffs. — Snags and Logs: Trees are considered snags if they are dead or dying and exhibit sufficient decay characteristics to enable cavity excavation/use by wildlife. Priority snags have a diameter at breast height of > 20 in (51 cm) in western Washington and are > 6.5 It (2 m) in height. Priority logs are > 12 in (30 cm) in diameter at the largest end, and > 20 ft (6 m) long. Note: All vegetated wetlands are by definition a priority habitat but are not included in this list because they are addressed elsewhere. 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