A.
Findings of fact.
(1)
In their natural condition and state, wetlands and watercourses function to provide multiple ecological benefits, including:
(a)
Storing and regulating the distribution of surface water, water quality renovation during groundwater and aquifer recharge, and/or functioning as settling basins for the removal of pollutants, including the trapping of sediments.
(b)
Controlling flooding and stormwater runoff by storing or regulating natural flows.
(c)
Providing unique breeding, foraging, cover, and seasonal or year-round habitats for diverse wildlife species, including many listed as "special concern," "threatened," "endangered," and "rare" by federal, state, county and local agencies.
(d)
Supporting unique biotic associations specifically adapted for survival in low-oxygen environments.
(e)
Providing areas of comparatively high plant productivity which supports significant wildlife diversity and abundance.
(f)
Providing breeding and spawning grounds, nursery habitat, and food for various species of fish, reptiles and amphibians, birds and mammals.
(g)
Serving as nutrient traps for nitrogen and phosphorus, and filters for surface water pollutants.
(h)
Helping to maintain biospheric stability by supporting particularly efficient photosynthesizers capable of producing significant amounts of oxygen, and supporting bacteria which processes excess nitrates and other nitrogenous pollutants and returning them to the atmosphere as inert nitrogen gas.
(i)
Providing open space and visual relief from intense development in urbanized and growing areas.
(j)
Serving as outdoor laboratories and living classrooms for the study and appreciation of natural history, ecology, and biology.
(k)
Preserving the quality and value of water-related recreational activities.
(l)
Protecting aquifers, reservoirs and watersheds vital to the community and to the water supply of New York City, Westchester County and Connecticut.
(m)
Protecting and maintaining stability of stream and watercourse channels, shorelines and banks, thereby controlling and reducing erosion, flooding and related property damage.
(2)
The integrity and realization of the full potential of wetland and watercourse functions and benefits is inextricably linked to the presence of intact, undisturbed natural communities or adjacent buffer areas surrounding wetlands and watercourses. As an interlocking landscape component of wetlands and watercourses, such buffer areas provide essential functions and values, including:
(a)
Serving as important, often critical, travel corridors and wetland-to-upland transitional habitats vital to the ecological needs and life cycle of many wetland/watercourse dependent species, including many amphibians, reptiles, birds and mammals whose survival is in jeopardy due to increasing loss of such buffer area habitat. While undisturbed adjacent buffer areas comprise a relatively small portion of the landscape, they, in combinations with wetlands and watercourses, are irreplaceable habitat links in the life cycles of the greatest proportion of area wildlife, including game and nongame species - a number of which are federal, state and county listed as special concern, rare, threatened or endangered.
(b)
Serving as visual and noise barriers, protecting wetland/watercourse wildlife from human disturbance.
(c)
Ameliorating potentially harsh environmental conditions by serving as windbreaks and solar reflectors, facilitating the warming of surface waters during early spring to produce water temperatures vital to the initiation of the breeding cycles of many wetland-/watercourse-dependent invertebrates, amphibians, reptiles, and fish; and providing shade - particularly during the growing season when the ambient heat load progresses - allowing wetlands/watercourses to maintain cool, well-oxygenated water supplies, and maintain atmospheric moisture levels amenable to moisture-sensitive amphibians.
(d)
Controlling flooding by slowing overland runoff and absorbing and storing substantial amounts of sheet flow, thereby assisting wetlands and watercourses in controlling flooding and gradually releasing flood flows to lower watersheds.
(e)
Trapping sediments in sheet flow, removing and assimilating excess nutrients from stormwater, and intercepting the soil-erosive force of precipitation, thereby protecting wetlands and watercourses against eutrophication (excess nutrient enrichment) and sedimentation, which can adversely affect proper wetland and watercourse functions and values.
(f)
Providing the first line of defense in the protection of wetlands and watercourses against the adverse impacts of stormwater-borne pollutants of human origin, including fertilizers, herbicides, pesticides, heavy metals, viral and bacterial agents associated with septic leachate, and various types of petroleum products. In essence, wetland and watercourse buffer areas work synergistically with aquatic resources to protect groundwater and surface water quality.
(g)
Providing a practical and cost-effective means of protecting wetlands and watercourses, and controlling or preventing pollution.
(h)
Absorbing and transpiring water with a resulting absorption of heat energy, thereby creating a cooling effect on the local microclimate and reducing soil saturation which allows for additional storage of stormwater and a concomitant reduction in runoff potential; maintaining soil porosity, thus further increasing soil water-holding capacity; and preventing potentially adverse changes to wetland and watercourse hydroperiod (duration of inundation or saturation near the surface) which could trigger a change in floristic composition, adversely affecting the physiology, germination and seedling development of wetland and watercourse plant species, and the breeding activities of wetland-dependent animals.
(i)
Providing often unique wetland-to-upland transitional communities, with their own distinctive flora and fauna, unlike the habitat of wetlands and watercourses and drier uplands between which they lie. Consequently, buffer areas are critical ecological communities in their own right and serve as unique areas of substantial value for passive recreation, outdoor education and scientific research.
(3)
Upland adjacent areas surrounding wetlands and watercourses provide an essential protective buffer with benefits which are significant for maintaining the functional integrity and quality of such resources, and for furnishing protection against adverse impacts from activities in surrounding land areas.
(4)
Many factors affect the ability of buffer areas of various widths to protect wetlands and watercourses, including, but not limited to, type and extent of vegetative cover, time of travel of overland flow, adjacent land uses, amount of impervious cover, slope, soil type, and drainage characteristics.
(5)
Considerable acreage of these important natural resources has been lost or impaired by draining, dredging, filling, excavating, building, polluting, and other acts inconsistent with the natural uses of such areas. Without increased protection and larger intact upland buffer areas, remaining wetlands and watercourses are in greater jeopardy of being lost, despoiled, or impaired by such acts, contrary to the public safety and welfare.
(6)
It is therefore the policy of the Town of Lewisboro to protect its citizens, including generations yet unborn, by preventing the despoliation and destruction of wetlands and watercourses, while taking into account varying ecological, economic, recreational, and aesthetic values. Activities that may damage wetlands and watercourses should be located on upland areas, separated by densely vegetated upland buffer areas of sufficient width.
B.
Intent. It is the intent of the Town of Lewisboro that activities in and around wetlands, watercourses and associated buffer areas be conducted in conformance with the provisions of this chapter and in a manner which promotes the preservation of wetlands, watercourses and associated buffer areas as specified in the findings of fact set forth herein; conforms with all applicable building codes, sediment control regulations, and other applicable regulations; and does not threaten public safety or the natural environment, or cause nuisances or adversely affect the natural functions of wetlands and watercourses by:
(1)
Impeding flood flows, reducing flood storage areas, or destroying storm barriers, thereby resulting in increased flood heights, frequencies, or velocities on other lands.
(2)
Increasing water pollution through location of domestic waste disposal systems in wet soils; inappropriate siting of stormwater control facilities; unauthorized application of fertilizers, pesticides, herbicides and algicides; disposal of solid wastes at inappropriate sites; placement of unstabilized fills; or the disturbance or removal of wetland soils and vegetation serving pollution and sediment control functions.
(3)
Increasing erosion and subsequent sedimentation.
(4)
Decreasing breeding, nesting, and feeding areas for many species of waterfowl and shorebirds, including those that are listed as "special concern," "rare," "threatened" or "endangered."
(5)
Interfering with the exchange of nutrients needed by fish and other forms of wildlife.
(6)
Decreasing habitat for fish, reptiles and amphibians, and other forms of wildlife.
(7)
Adversely altering the recharge or discharge functions of wetlands, thereby impacting groundwater or surface water supplies.
(8)
Significantly altering the wetland hydroperiod and thereby causing either short- or long-term changes in wetland and watercourse community composition, soils characteristics, nutrient recycling, or water chemistry.
(9)
Destroying sites valued for education and scientific research, such as outdoor biophysical laboratories, living classrooms, and training areas.
(10)
Interfering with public rights in navigable waters and the recreation opportunities provided by wetlands and watercourses for hunting, fishing, boating, hiking, bird watching, photography, camping, and other uses.
(11)
Destroying or damaging aesthetic and property values, including significant public viewsheds.
(12)
Destroying or reducing undisturbed adjacent upland areas surrounding wetlands and watercourses, which provide a protective buffer.