Class I Wetlands1,2,3 | Class II Wetlands1,2,3 | Class III Wetlands1,2,3 | Class IV Wetlands1,2,4 |
Class I wetlands provide the most critical of the State's wetland benefits, reduction of which is acceptable only in the most unusual circumstances. A permit shall be issued only if it is determined that the proposed activity satisfies a compelling economic or social need that clearly and substantially outweighs the loss of or detriment to the benefit(s) of the Class I wetland. | Class II wetlands provide important wetland benefits, the loss of which is acceptable only in very limited circumstances. A permit shall be issued only if it is determined that the proposed activity satisfies a pressing economic or social need that clearly outweighs the loss of or detriment to the benefit(s) of the Class II wetland. | Class III wetlands supply wetland benefits, the loss of which is acceptable only after the exercise of discernment. A permit shall be issued only if it is determined that the proposed activity satisfies an economic or social need that outweighs the loss of or detriment to the benefit(s) of the Class III wetland. | Class IV wetlands provide some wildlife and open space benefits and may provide other benefits cited in the act. Therefore, wanton or uncontrolled degradation or loss of Class IV wetlands is unacceptable. A permit shall be issued for a proposed activity in a Class IV wetland only if it is determined that the activity would be the only practicable alternative which could accomplish the applicant's objectives. |
1 The proposed activity must be compatible with the public health and welfare.
2 The proposed activity must be the only practicable alternative which could accomplish the applicant's objectives and must have no practicable alternative on a site that is not a freshwater wetland or adjacent area.
3 The proposed activity must minimize degradation to, or loss of, any part of the wetland or its adjacent area and must minimize any adverse impacts on the functions and benefits which that wetland provides.
4 The proposed activity must make a reasonable effort to minimize degradation to, or loss of, any part of the wetland or its adjacent area.
If a proposed activity is inconsistent with physical health, or with any related laws, regulations and government policies, this would weigh against issuing a permit under the act until such conditions were met that would make the proposed activity consistent with these provisions.
Permit issuance cannot be indiscriminate or unexamined for Class IV wetlands and still require consideration of loss of wetland values.
The statewide minimum land-use regulations establish the compatibility categories to be used in conjunction with the different types of land-use activities to be conducted upon freshwater wetlands or adjacent areas. For activities and land uses not shown on this chart, a local government or the department, as appropriate, must first make a determination that the activity is a regulated activity as defined in the act and section 665.2 of this Part. If the activity is regulated, then an independent determination of compatibility using the three tests for compatibility contained in the standards for permit issuance in subdivision (e) of this section must be used.
Area categories | Compatibility categories |
FWW - Freshwater Wetland | LP - Compatible; letter of permission issued |
AA - Adjacent Area | C - Usually compatible |
N - Usually incompatible | |
X - Incompatible | |
E - Exempt |
Exempt Activities | |||
The following activities either have been exempted from regulation by the act or are not regulated because they will not substantially impair any of the functions and benefits of freshwater wetlands. | |||
Compatibility by Area | |||
Items | Activities | FWW | AA |
1. | Continuing lawfully existing uses and continuing all activities normally and directly associated with any such use, except for those activities covered by items 38, 39, 40 and 41, where such continuance does not involve expansion or significant alteration of the existing use and does not affect additional wetland area. | E | E |
2. | Establishing scenic, historic, wildlife, and scientific preserves, where no significant impairment of the wetland or its benefits is involved. | E | E |
3. | Boating, hiking, swimming, camping, picnicking and other similar nonmotorized forms of outdoor activity, where no significant impairment of the wetland or its benefits is involved. | E | E |
4. | Depositing or removing the natural products of wetlands in the process of recreational or commercial fishing, shellfishing, aquiculture, hunting or trapping, including the erection and maintenance of temporary hides or blinds. | E | E |
5. | Conducting educational and scientific research activities where no significant impairment of the wetland or its benefits is involved. | E | E |
6. | Establishing walking trails, where no significant impairment of the wetland or its benefits is involved. | E | E |
7. | Establishing an individual recreational mooring. | E | E |
8. | Gathering fuelwood, except as covered by items 22, 23 and 24. | E | E |
9. | Conducting an agricultural activity as defined in the act or section 665.2 of this Part. | E | E |
Existing Structures and Facilities | |||
Normally, maintenance, repair or restoration of existing facilities will not cause adverse impacts on wetlands. This is not always true, however, for construction activities that are associated with such maintenance, repair or restoration, such as the placing of access roads, staging areas and utilities. Various such associated activities are listed elsewhere in this chart. | |||
Expansion or substantial restoration or reconstruction of existing structures and facilities can have significant impacts on the functions and benefits of wetlands. These impacts can be greater than those caused by the total replacement of the structures or facilities or by their construction in a different location. | |||
Compatibility by Area | |||
Items | Activities | FWW | AA |
10. | Ordinary maintenance and repair of existing functional structures, facilities or improved areas, including but not limited to bridges, roads, highways, culverts, railroad beds, bulkheads, docks, beaches, piers, wharves, pilings, dolphins, utility rights-of-way, buildings, landscaped or paved areas, lawns, and mosquito control ditches. Such maintenance and repair might include, for example, replacing broken boards in docks, repainting structures, redriving pilings, resurfacing paved areas, and installing and removing docks on a seasonal basis, but does not include activities covered by items 22, 23, 24, 38, 39, 40 and 41 or other applicable items listed in this chart. | E | E |
11. | In-kind and in-place replacement of existing functional bulkheads and similar structures. | LP | LP |
12. | Routine beach regrading and cleaning. | LP | LP |
13. | Restoring, reconstructing or modifying existing functional structures or facilities which involves a temporary disturbance of less than 50 square meters (approximately 540 square feet) of ground surface. | C | LP* |
14. | Expanding or substantially modifying existing functional structures or facilities, except for activities covered by items 13, 19 or 31. | N | C |
Operating Motor Vehicles | |||
Intense use of motor vehicles may impair any of the several functions and benefits of wetlands by introducing or increasing contaminants, noise or other forms of pollution, or by removing or reducing vegetation and exposing soil to erosion. Occasional use generally does not warrant regulation. | |||
Compatibility by Area | |||
Items | Activities | FWW | AA |
15. | Operating all-terrain vehicles, air and motor boats, and snowmobiles, except as described in item 16. | E | E |
16. | Intensive, organized and repetitive use of all-terrain vehicles, air and motor boats and snowmobiles. | N | C |
Draining, Filling, Grading, Clear-cutting and Dredging | |||
Generally, draining of wetlands lowers groundwater levels, may increase downstream peak flows, and may decrease water storage capacity and downstream base flow. It may also cause changes in vegetation and water temperature, increased stream bed scouring, and sediment deposition. Draining can totally destroy a wetland. | |||
Filling decreases the number and size of wetlands, thereby decreasing their ability to collect runoff and prevent erosion and sediment deposition downstream. Certain fill materials may adversely affect water quality. Disposal of dredge material may result in erosion and cause turbidity and sediment deposition. Filling eliminates wetland habitat for fish and wildlife, may alter the water table and groundwater flow and adversely affect groundwater recharge, and can irreversibly destroy a wetland. | |||
Grading a wetland or adjacent area can substantially alter surface water drainage and flow patterns, may temporarily increase erosion, and may eliminate fish and wildlife habitat. | |||
Clear-cutting removes the vegetative cover of wetlands and may reduce their ability to absorb water and serve as habitat. It may also cause soil erosion. | |||
Dredging or excavation may increase water depth and remove wetland vegetation, thus altering the basic characteristics of, and perhaps destroying, wetlands. Fish and wildlife feeding or reproductive capacities may be altered, as may covertypes, turbidity, sediment deposition and erosion patterns. | |||
Any of these activities can cause the permanent loss of benefits provided by wetlands, and may, in fact, destroy wetlands entirely. | |||
Compatibility by Area | |||
Items | Activities | FWW | AA |
17. | Draining and altering water levels, except as part of an agricultural activity. | X | X |
18. | Removing or breaching beaver dams. | N | C |
19. | Constructing, expanding or substantially modifying drainage ditches, except as part of an agricultural activity. | X | N |
20. | Filling, including filling for agricultural purposes. | X | N |
21. | Installing or creating a dry well, retention basin, filter, open swale or pond. | N | N |
22. | Clear-cutting trees. | N | C |
23. | Clear-cutting vegetation other than trees except as part of an agricultural activity. | X | N |
24. | Cutting but not elimination or destruction of vegetation, such that the functions and benefits of the wetland are not significantly adversely affected. | LP | LP |
25. | Grading, and dredging not included in item 26. | X | N |
26. | Dredging less than 400 cubic meters (approximately 523 cubic yards) to maintain present navigation channels. | C | C |
27. | Mining. | X | X |
28. | Constructing roads, except for winter truck roads as defined in section 665.2(c)(1)(vi) of this Part. | X | N |
29. | Drilling a water well to serve an individual residence. | C | LP |
30. | Drilling a well, except for activities covered by item 29. | X | N |
Dams, Docks and Bulkheads | |||
Generally, structures of this type are indicative of associated development which may increase disruptive human use or occupancy of wetland areas. | |||
A structure sometimes interferes with surface or subsurface water flow, increases water levels, or otherwise affects wetland water supply. The impact of such a structure is related to its size, location and design. For example, docks on piles are generally more compatible with the functions and benefits of wetlands than are docks on fill. | |||
Dams alter normal flow patterns and often increase water levels, thus eliminating or altering the natural vegetation. Depending on the size of the structure, entire wetlands can be destroyed. | |||
Compatibility by Area | |||
Items | Activities | FWW | AA |
31. | Installing a dock, pier, wharf or other structure built on floats or open-work supports and having a top surface area of 20 square meters (approximately 200 square feet) or less. | C | C |
32. | Installing any dock, pier, wharf or other structure used as a landing place on water, except for activities covered by item 31. | N | N |
33. | Constructing groins, bulkheads and other shoreline stabilization structures. | X | N |
34. | Constructing or removing berms, levees, dikes, dams, and other control structures. | X | N |
Utilities | |||
Installing utilities in or adjacent to wetlands will be presumed to cause less damage to those wetlands if little or no additional clearing and grading is necessary. Where extensive clearing and construction of access or maintenance roads occurs, erosion and sedimentation may be the most serious problems. | |||
Installing overhead lines, while often spanning wetlands and thereby minimizing construction impacts, will result in a permanent adverse aesthetic impact on wetlands. Overhead power lines may also result in higher bird mortality rates, either through collision or electrocution. | |||
Compatibility by Area | |||
Items | Activities | FWW | AA |
35. | Installing utility service to an individual residence. | LP | E |
36. | Installing electric, telephone or other utilities from an existing utility distribution facility to a structure, except for activities covered by item 35, where no major modifications or construction activities in the wetland are necessary. | C | LP |
37. | Installing utilities, except for activities regulated by article VII or VIII of the Public Service Law or by item 36. | X | N |
Pollution and Pesticides | |||
Introduction of sewage effluent, runoff of pesticides, or disposal of toxic substances into wetlands or adjacent areas may contaminate ground and surface water with undesirable chemicals, nutrients and organisms. The contamination may be temporary or permanent. It may result from activities located directly in wetlands or within adjacent areas, but, due to runoff and drainage patterns, it may also be caused by activities located some distance away. Distant activities can have adverse effects as severe as those caused by activities within or adjacent to wetlands. The presence of pollutants or pesticides in wetlands or adjacent areas may increase mortality rates among fish and wildlife, alter their behavior or reproductive capability, and adversely affect their value as a food source. Excessive nutrients alter vegetative cover, fish and wildlife distribution and water potability. Resulting organisms may also create a health hazard. | |||
Compatibility by Area | |||
Items | Activities | FWW | AA |
38. | Introducing or storing any substance, including any chemical, petrochemical, solid waste, nuclear waste, toxic material, sewage effluent or other pollutant, except as described in items 39, 40 and 41. | X | X |
39. | Application of a pesticide conducted pursuant to a permit issued under article 15 of the Environmental Conservation Law (see 6 NYCRR Parts 327, 328 and 329). | N | C |
40. | Application of a pesticide where no permit is required under article 15 of the Environmental Conservation Law (see 6 NYCRR Parts 327, 328 and 329). | X | X |
41. | Application of a pesticide to the grounds of a private residence when such use is by the owner. | C | LP |
Buildings | |||
Constructing buildings, accessory roads and parking areas can have several effect on wetlands, not the least of which is the increased pressure to continue development beyond the initial construction. | |||
Roofs and paved areas quickly shed rain where that rain previously had an opportunity to soak into the ground. This can result in more turbulent streamflow, more erosion and sedimentation, and higher water levels in surrounding areas, including in nearby wetlands. | |||
The effects of filling, grading and draining are discussed elsewhere in this chart. | |||
Compatibility by Area | |||
Items | Activities | FWW | AA |
42. | Constructing a residence or related structures or facilities. | X | N |
43. | Constructing commercial or industrial facilities, public buildings or related structures or facilities. | X | X |
Footnotes
1 The proposed activity must be compatible with the public health and welfare.
2 The proposed activity must be the only practicable alternative which could accomplish the applicant's objectives and must have no practicable alternative on a site that is not a freshwater wetland or adjacent area.
3 The proposed activity must minimize degradation to, or loss of, any part of the wetland or its adjacent area and must minimize any adverse impacts on the functions and benefits which that wetland provides.
4 The proposed activity must make a reasonable effort to minimize degradation to, or loss of, any part of the wetland or its adjacent area.
* For classic kettlehole bogs as defined in section 665.2(g) of this Part, the category is "C".
N.Y. Comp. Codes R. & Regs. Tit. 6 § 665.7