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New York State Thruway Authority


Wetland Mitigation

Picture of Montezuma Wetlands Complex Mitigation ProjectThere are times when rehabilitation and maintenance of Thruway Authority (Authority) infrastructure impacts natural wetlands along the highway corridor. As such, the Authority has undertaken unique and innovative wetland mitigation projects. To ensure the projects are successful, the Authority works closely with various Federal and State agencies, including the New York State Department of Environmental Conservation (NYSDEC) and the U.S. Army Corps of Engineers (USACE) on these important endeavors;

Montezuma Wetlands Complex Mitigation Project
As part of the 1-90 Reconstruction Project, located just east of Syracuse, the Authority worked with Ducks Unlimited, Inc. (DU), the USACE and NYSDEC to undertake a distinctive mitigation project in the Montezuma Wetlands Complex (MWC). The Authority's mitigation project restored 14 acres of valuable wetlands in the Northern Montezuma Wetlands Complex, located in the Town of Savannah in Wayne County. The site is owned by NYSDEC and is part of their Northern Montezuma Wildlife Management Area. The MWC provides a home for hundreds of wildlife species and functions as a major migration stop for waterfowl and shorebirds in the Atlantic Flyway.  Once one of the largest wetland complexes in the Northeast, the MWC supported more than 40,000 acres of contiguous wetland habitat.

Evangola State Park Wetland Mitigation
The Authority, in partnership with the New York State Office of Parks, Recreation and Historic Preservation, completed a noteworthy wetland Picture of Evangola State Park Wetlandsproject at Evangola State Park on Lake Erie, south of Buffalo.   As a result of  a 2010 road reconstruction project located on nearby I-90, the wetland mitigation project created three new acres of wetlands within the Park to restore the natural Picture of Evangola State Park Wetlandslandscape.  These valuable wetlands provide a variety of environmental benefits as well as educational and recreational opportunities for the public to enjoy.  The wildlife habitat will help support the natural food chain, create a stopover for migrating waterfowl, foster a breeding habitat for migratory and nesting bird species, and provide a winter home for amphibians,  Additional features of the project include walking trail and interpretive signs. In 2013, the American Council of Engineering Companies of New York selected this project as its Gold Award Winner.

Biodiversity/Endangered Species

Maintaining the biodiversity of New York State is an important aspect of Environmental Stewardship. New York is fortunate to have a unique environment rich with many different species of animals and plants.   As such, the Authority has performed numerous projects to protect species found near and adjacent to the highway.  Some examples of these are as follows:

Osprey Nest

Picture of Osprey NestPicture of Osprey NestPicture of Osprey Nest

The New York State Canal Corporation (Corporation) recently identified a pair of ospreys nesting on top of an out-of-service mobile crane at the Corporation's Lysander maintenance yard.  The Lysander facility is located beside the Oswego River and surrounded by wetlands on three sides.  Once established, osprey nests are often used year after year. Therefore, to help ensure a viable future osprey population, the Corporation, in cooperation with the New York State Department of Environmental Conservation (NYSDEC), relocated the nest to a nearby abandoned inoperable radio tower retrofitted with a platform.     

The Corporation considers the ospreys an asset and intends to maintain a safe environment for their nest. 

The peregrine falcon is an endangered species in New York State. Picture of falconsIn the late 1980s, the Authority had falcon nesting boxes installed on the main trusses of four major bridges along the Thruway System: the Tappan Zee Bridge which crosses the Hudson River and is located 13 miles north of New York City; the Castleton Bridge, which spans the Hudson River south of Albany; and the North and South Grand Island Bridges, both of which cross the Niagara River.

It is a symbiotic relationship. The bridges provide high vantage points for these birds of prey and create a safe nesting zone away from human interference, while the falcons keep pigeons off the bridges.  Keeping the pigeons at bay is beneficial in increasing the life of the bridge as pigeon droppings are harmful to the paint and steel of the structure. Since the program's inception, the number of pigeons nesting on bridges has dramatically decreased.

Authority staff also coordinates with the NYSDEC and the New York City Department of Environmental Conservation to band falcon chicks nesting on the Grand Island and Tappan Zee Bridges, to track the livelihood of these endangered birds. Additionally, the Authority works with NYSDEC and the New York City Department of Environmental Protection to monitor the Tappan Zee Bridge falcons.

Picture of falconsPicture of falcons

Invasive Species

Invasive Species According to the Federal Highway Administration, approximately $23 billion is lost each year nationwide due to invasive plant impacts to agriculture, industry, recreation, and the environment. An estimated 4,600 acres of land are affected daily by invasive plants.

Therefore, the Thruway Authority (Authority) proactively takes precautions to control the spread of invasive species to unspoiled areas.  During maintenance activities, such as ditch cleaning and culvert work, among the preventative measures employed are: Invasive Specieswashing vehicles and equipment before moving them from one site to another; monitoring soil movement and stockpiling for invasive species; and providing special protection to pristine, invasive-free areas, especially wetlands. Additionally, in Authority contract plans contractors are directed to take all reasonable precautions to prevent the spread of invasive plant species materials when conducting earthwork activities. The Authority also participates in an inter-agency Council to control and combat invasive species. For more information about the Invasive Species Council, please visit the New York State Department of Environmental Conservation at Leaving NYS Thruway Authority's Website 

More information on invasive species in New York State can be found at the New York Invasive Species Clearinghouse website, at: Leaving NYS Thruway Authority's Website 

Living Snow Fence Program

Living Snow Fence being planted by Thruway workersIn the winter months, blowing and drifting snow can be a safety hazard for the traveling public. To help alleviate this issue,  the Thruway Authority has installed "living snow fences" parallel to the highway. Rows and clusters of willow   trees and evergreens were strategically planted in areas prone to heavy snow fall and blowing and drifting snow. Living Snow Fence being planted by Thruway workersThese densely planted configurations trap some of the snow and dissipate blowing snow before it can collect on the highway.

Living snow fences were first installed in 2006, in collaboration with the State University of New York, College of Environmental Science and Forestry, along the I-90 right-of-way at Interchange 18A and Interchange 20 in the Town of Grand Island, Erie County.

Currently, there are more than 5,600 willows and 1,400 conifers located along more 18,000 feet of the Thruway right-of-way, with other potential locations identified each year.

Shoreline Stabilization Project

Shoreline Stabilization Project

The shoreline of Lake Erie, in the vicinity of the Black Rock Canal, was found to be eroding due to wave action and ice scouring.  Stormwater drainage from I-190 in Buffalo also appeared to contribute to the erosion.

To help mitigate and correct the problem, the Thruway Authority, in cooperation with the State University of New York College at Buffalo, installed heavy stone fill to protect 300 feet of the shoreline near stormwater outfall drainage in this location.

Shoreline stabilization will prevent further erosion and sedimentation while promoting the natural restoration of valuable habitat for a variety of warm water fish and aquatic invertebrates. 

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