Key Resource: Hydrologic Resources
Water resources include surface waters (lakes, rivers, streams, estuaries, seas, reservoirs, etc.) and associated hydrologic systems such as wetlands, coastal zones, and floodplains. Water resources within the Study Area may be used for drinking water, agriculture, industrial processes, transportation, and recreation. Wetlands and floodplains function as natural flood control systems that reduce the speed and volume of runoff, and improve water quality as well as provide habitat essential to a healthy ecosystem. Federal, state, and local governments have developed programs and regulations to protect and manage water resources. Construction activities and development associated with transportation could increase stormwater runoff, thereby degrading water quality and affecting aquatic habitats such as wetlands and estuaries (see Chapter 7.6, Ecological Resources, for an in-depth discussion of potential impacts to ecosystems and water habitats). This section focuses on water resources within the Study Area.
See Chapter 7.7, Geologic Resources (Section 7.7.3), for a discussion and evaluation of sole source aquifers.
This section includes the definitions, as used in this Tier 1 Draft Environmental Impact Statement (Tier 1 Draft EIS), of surface waters, water quality, floodplains, freshwater and saltwater wetlands, and coastal zones. These resources have been grouped into three main categories:
Appendix E, Section E.05, provides a description of the methodology used for analyzing existing conditions and Environmental Consequences of each of these hydrologic/water resources.
The Federal Railroad Administration (FRA) developed an effects-assessment methodology for each of the three categories of water resources identified in Section 126.96.36.199. The methodologies provide a detailed definition of each resource, data sources, an explanation on how the Affected Environment was defined and established, and how the effects on each resource were evaluated and reported. Table 7.5-1 summarizes key factors associated with the methodologies for each hydrologic/water resource evaluated in this Tier 1 Draft EIS.
|Resource||Affected Environment*||Type of Assessment||Outcome|
|Surface Waters||2,000 feet||Quantitative: Acres/ linear feet||Identification of number of surface waters affected by the Representative Route of each Action Alternative and potential associated effects.|
|Water Quality||2,000 feet||Qualitative||Identification of established water quality for identified surface waters and understanding of how Action Alternatives could influence established water quality.|
|Freshwater Wetlands||2,000 feet||Quantitative: Acres||Identification of number of acres of freshwater wetlands affected by the Representative Route of each Action Alternative.|
|Floodplains||2,000 feet||Quantitative: Acres
|Identification of number of special flood hazard areas affected by the Representative Route of each Action Alternative.
Identification of Action Alternatives located in areas subject to increased flood risk due to climate change and sea level rise.
|Coastal Zones||2,000 feet||Quantitative: Route miles||Identification of number of route miles of each Action Alternative that are within an established coastal zone.|
|Saltwater Wetlands||2,000 feet||Quantitative: Acres||Identification of number of saltwater wetlands affected by the Representative Route of each Action Alternative.|
Hydrologic resources are protected and regulated under various federal, state, and local laws such as the Clean Water Act (33 USC 1344). Implementation of the Action Alternatives can result in degradation of water quality, dredge and fill of wetlands, encroachment of floodplains, development in coastal zone management areas, and crossing of navigable waterways. These effects would result from construction and operations associated with modification of existing rail infrastructure, such as expansion of rail rights-of-way, and/or construction of new rail infrastructure, such as railroad tracks or stations. Adverse effects on these resources require mitigation and permitting by regulating agencies such as the U.S. Environmental Protection Agency (EPA), U.S. Army Corps of Engineers (USACE), state environmental agencies, and localities.
Numerous water resources exist within the Study Area, including within the Affected Environment and Representative Route for the existing NEC and each Action Alternative. The FRA collected, catalogued, and analyzed data pertaining to waterbodies and corresponding hydrologic systems such as floodplains and wetlands, and identified potential impacts to water resources of interest. Appendix E, Section E.05, contains a complete list of the hundreds of streams, rivers, lakes, ponds, estuaries, and bays that occur within the Affected Environment of the Action Alternatives.
Understanding the locations of hydrologic resources is important as it can influence decisions on infrastructure needs and design considerations. The analysis presented in this section identifies concentrations of known hydrologic resources that the FRA will consider when identifying the Preferred Alternative and that future project proponents should evaluate further during Tier 2 project planning and development. Key findings of the hydrologic resources analysis are:
Similar to the Study Area, numerous water resources were identified within the Affected Environment. Table 7.5-2 through Table 7.5-7 summarize the quantities, where applicable, and types of resources identified for the existing NEC and the Action Alternatives; these tables list only the largest water resources, but Appendix E, Section E.05, provides a full listing of resources.
|Resource||Existing NEC||Alt. 1||Alt. 2||Alternative 3|
|D.C. to NYC||New York City to Hartford||Hartford to Boston|
|via Central Connecticut||via Long Island||via Providence||via Worcester|
|Freshwater Wetlands (acres)||8,535||9,375||11,430||5,155||2,225||1,580||5,705||5,820|
|Saltwater Wetlands (acres)||6,430||6,695||7,190||2,535||1,985||6,470||2,875||2,795|
|Total Wetlands (acres)||14,965||16,070||18,620||7,690||4,210||8,050||8,580||8,615|
|Coastal Zone (route miles)||180||225||235||115||110||135||50||15|
The FRA identified water resources associated with freshwater wetlands within the Affected Environment for each of the Action Alternatives. Given the numerous resources present, Table 7.5-3 lists only those resources within counties in which the Affected Environment of an Action Alternative contains a higher than average number of freshwater wetlands; the average acreage of freshwater wetlands present within each Action Alternative's Affected Environment is 250 acres per county. Note that an Action Alternative may cross a resource and not be listed in Table 7.5-3 if that resource has less than 250 acres of freshwater wetlands associated with it for that county.
Table 7.5-3 also notes those resources with special water quality designations. See Appendix E, Section E.05, for a complete list of all surface waters and corresponding water quality designations.
Table 7.5-4 lists Navigable Waterways crossed by either the existing NEC or Action Alternatives. While numerous Navigable Waterways exist within the Affected Environments of the Action Alternatives, only those that are crossed by the Representative Route are noted. Also noted are Navigable Waterways that are not currently crossed by the existing NEC but would be crossed by one or more of the Action Alternatives.
Resources associated with floodplains have been identified within the Affected Environment for each of the Action Alternatives. Given the numerous resources present within the Affected Environments for each Action Alternative, Table 7.5-5 lists only those resources within counties in which the Affected Environment of an Action Alternative encompasses a higher than average number of associated SFHA; the average acreage of SFHA present within each Action Alternative's Affected Environment is 700 acres per county.
|State||County||Resource of interest||Existing NEC||Alt. 1||Alt. 2||Alt. 3|
|MD||Anne Arundel||Patuxent River (WQ)||X||X||X||X|
|Baltimore||Gunpowder River and Gunpowder Falls (both WQ)||—||—||—||X|
|Harford||Gunpowder and Bush Rivers (both WQ)||—||—||—||X|
|DE||New Castle||Christina River (WQ)||X||X||X||X|
|Philadelphia||Schuylkill River (WQ)||—||—||X||X|
|Bucks||Van Skiver Lake||X||X||X||X|
|NJ||Mercer||Assunpink Creek (WQ)||X||X||X||X|
|Middlesex||Lower Hudson River||X||X||X||X|
|NY||Westchester||Mamaroneck (WQ) and Cross Rivers||—||—||—||X|
|CT||Fairfield||Major Tributaries of Long Island Sound (WQ)||—||—||—||X|
|New Haven||Major Tributaries of Long Island Sound (WQ)||X||X||X||X|
|New London||Major Tributaries of Long Island Sound (WQ)||X||X||X||X|
|Hartford||Major Tributaries of the Connecticut River (WQ)||—||—||X||X|
|Tolland||Hop, Skungamaug, Willimantic, Fenton, and Mount Hope Rivers (all WQ)||—||—||—||X|
|Windham||Connecticut Coastal (Atlantic Ocean) (WQ)||—||—||X||X|
|RI||Washington||Pawcatuck River and Chapman Pond (both WQ)||X||X||X||X|
|Providence||Major tributaries of Narragansett Bay (WQ)||—||—||X||X|
|MA||Bristol||Major Tributaries of Massachusetts Coastal (Atlantic Ocean) (WQ)||X||X||X||X|
|Norfolk||Neponset River (WQ)||X||X||X||X|
|Worcester||Quinebaug, Little, French, Quinsigamond, Assabet, and Sudbury Rivers (all WQ)||—||—||—||X|
|State||County||Resource of Interest||Construction Type at Crossing||Existing NEC||Alt. 1||Alt. 2||Alt. 3|
|MD||Baltimore||Gunpowder River||Major Bridge||X||X||X||X|
|Harford||Bush River||Major Bridge||X||X||X||X|
|DE||New Castle||Christina River||Aerial||—||—||—||X*|
|PA/NJ||Bucks/Mercer||Delaware River||Major Bridge||X||X||X||X|
|Hudson||Hackensack River||Major Bridge||X||X||X||X|
|Suffolk||Port Jefferson Harbor||Tunnel||—||—||—||X*|
|CT||Fairfield||Pequonnock River||Major Bridge||X||X||X||X|
|NY/CT||Suffolk/New Haven||Long Island Sound||Tunnel||—||—||—||—|
|CT||New Hven||West River||Major Bridge||X||X||X||X|
|Mill River||Major Bridge||X||X||X||X|
|Quinnipiac River||Major Bridge||X||X||X||X|
|Middlesex/ New London||Connecticut River||Major Bridge||X||X||X||X|
|New London||Niantic River||Major Bridge||X||X||X||X|
|Thames River||Major Bridge||X||X||X||X|
|Mystic River||Major Bridge||X||X||X||X|
|Stonington Harbor||Major Bridge/ Common Grade||X||X||X||X|
|CT/RI||New London/ Washington||Pawcatuck River||Aerial||X||X||X||X|
|State||County||Resource of interest||Existing NEC||Alt. 1||Alt. 2||Alt. 3|
|MD||Anne Arundel||Patuxent River||X||X||X||X|
|Harford||Gunpowder and Bush Rivers||X||X||X||X|
|DE||New Castle||Christina and Delaware Rivers||X||X||X||X|
|NJ||Middlesex||Major Tributaries of the Raritan and Lower Hudson Rivers||X||X||X||X|
|NJ||Hudson||Passaic, Lower Hackensack, and Hudson Rivers||X||X||X||X|
|NY||Westchester||Mamaroneck and Cross Rivers||—||—||—||X|
|CT||Fairfield||Major tributaries of Long Island Sound including Rippowam, Goodwives, Fivemile, Norwalk, Indian, Saugatuck, Mill, Rooster, Pequonnock, Housatonic, and Noroton Rivers||X||X||X||X|
|New Haven||Major tributaries of Long Island Sound including Wepawaug, Hammonasset, Indian, Oyster, Cove, West, Mill, Quinnipiac, Little, Farm, East, Neck, and Cover Rivers||X||X||X||X|
|Middlesex||Major tributaries of Long Island Sound including Hammonasset, Indian, Hammock, Menunketesuck, Patchogue, Oyster, Connecticut, and Patchogue Rivers||X||X||X||X|
|New London||Major tributaries of Long Island Sound including Lieutenant, Dick, Threemile, Fourmile, Pattagansett, Niantic, Thames, Poquonock, Mystic, and Pawcatuck Rivers, Stonington Harbor, and Quanaduck Cove||X||X||X||X|
|MA||Worcester||Quinebaug, Little, Quinsigamond, and Sudbury Rivers (all WQ)||—||—||—||—|
The FRA identified coastal resources within the Affected Environment for each of the Action Alternatives. Given the numerous resources present, Table 7.5-6 lists only those coastal resources within counties in which the Affected Environment of an Action Alternative contains a higher than average number of acres of saltwater wetlands; the average acreage of saltwater wetlands present within the each Action Alternative's Affected Environment is 200 acres per county. Note that an Action Alternative may bisect a coastal resource and not be listed in the table if less than 200 acres of saltwater wetlands are associated with it for that county.
|State||County||Resource of interest||Existing NEC||Alt. 1||Alt. 2||Alt. 3|
|MD||Baltimore||Back River (WQ)||X||X||X||X|
|Harford||Gunpowder River (WQ) and Chesapeake Bay||X||X||X||X|
|DE||New Castle||Christina River (WQ)||X||X||X||X|
|NJ||Hudson||Hackensack and Hudson Rivers||X||X||X||X|
|NY||New York||Hudson and East Rivers (both WQ)||X||X||X||X|
|Suffolk||Long Island Sound||X||X||X||X|
|CT||Fairfield||Long Island Sound||X||X||X||X|
|Middlesex||Long Island Sound and Connecticut River (WQ)||X||X||X||X|
|New London||Major Tributaries of Long Island Sound||X||X||X||X|
|RI||Kent||Greenwich Bay (WQ)||X||X||X||X|
Table 7.5-6 notes the identified resources with special water quality designations. Appendix E, Section E.05, contains a complete list of all surface waters and corresponding water quality designations.
The assessment of the effects on coastal zones by Action Alternatives included identifying counties within the Affected Environment where the Action Alternative intersects CZMA boundaries, as well as describing the CZMA boundaries for each state. Because the coastal zone extends inland from the shoreline only to the extent necessary to control the shoreline as defined by each state, CZMA boundaries differ between jurisdictions. Jurisdictional coastal zones have been established for each affected state with the exception of Washington, D.C. The entire state of Delaware is a designated coastal zone.
Table 7.5-7 summarizes, by state, the CZMAs located in each Action Alternative's Affected Environment.
|State||County||Coastal Resource||CZMA Description by State||Existing NEC||Alt. 1||Alt. 2||Alt. 3|
|MD||Baltimore||Chesapeake Bay||The Maryland coastal zone comprises the land, water and subaqueous land between the territorial limits of Maryland in the Chesapeake Bay, Atlantic Coastal Bays and the Atlantic Ocean, as well as the towns, cities, and counties that contain and help govern the thousands of miles of Maryland shoreline. The Maryland coastal zone extends from 3 miles out in the Atlantic Ocean to the inland boundaries of the 16 counties and Baltimore City that border the Atlantic Ocean, Chesapeake Bay and the Potomac River up to Washington, D.C.||X||X||X||X|
|DE||New Castle||Delaware Bay/Delaware River||Under the federal Coastal Zone Management Act, the entire state of Delaware is considered a coastal zone. Major water crossings include White Clay Creek and Christina River.||X||X||X||X|
|PA||Delaware||Within Pennsylvania, the Delaware Estuary stretches 57 miles along the coastline in Bucks, Philadelphia, and Delaware Counties. The coastal zone varies from one-eighth mile wide in urban areas like Philadelphia, to over 3.5 miles in Bucks County and extends to the Pennsylvania/New Jersey boundary in the middle of the Delaware River. The coastal zone contains environmentally important islands, as well as the marshes and shorelands of tributary streams that are tidally influenced. The head of tide for the Delaware Estuary is located at the falls of the Delaware River near Morrisville, PA, and Trenton, NJ.||X||X||X||X|
|NJ||Mercer||Delaware Bay/Delaware River
Raritan Bay/Raritan River
Newark Bay/Hackensack River
|New Jersey's coastal zone encompasses tidal and nontidal waters, waterfronts, and inland areas. The coastal zone includes the Hudson River from the interstate border with New York, Newark Bay, and Hackensack River, and related tidal waters south to the Raritan Bay. The coastal zone continues along the Raritan Bay then extends south from Sandy Hook to Cape May Point encompassing the state territorial waters of the Atlantic Ocean and associated tidal waterbodies. From Cape May Point, the coastal zone trends north to Trenton and contains waters for the Delaware Bay and River and includes tidal portions of their tributaries. The coastal zone boundary encompasses approximately 1,800 miles of tidal coastline, including 126 miles along the Atlantic oceanfront from Sandy Hook to Cape May and ranges in width from 100 feet to 16.2 miles.||X||X||X|
|NY||New York||Hudson River/East River/Long Island Sound||The New York inland coastal boundary varies but is generally 1,000 feet from the shoreline of the mainland in non-urbanized areas of the state. In urbanized and developed coastal locations, the inland boundary is generally 500 feet from the mainland's shoreline, or less than 500 feet where a railroad or roadway runs parallel to the shoreline at a distance of less than 500 feet; in these locations the railroad or roadway defines the coastal boundary. In addition, the coastal zone boundary may extend inland up to 10,000 feet to encompass coastal resources such as areas of exceptional scenic value, agricultural or recreational lands, and major tributaries and headlands in some areas of the state such as Long Island Sound and the Hudson River Valley. The seaward coastal zone boundary in New York extends 3 nautical miles into the Atlantic Ocean for land bordering the ocean. In total, New York has approximately 2,625 miles of coast.||X||X||X||X|
|CT||Fairfield||Long Island Sound||Connecticut has a two-tiered coastal zone. The first tier "Coastal Boundary" generally extends inland 1,000 feet from the shore. The second tier "Coastal Area" includes all 36 of the state's coastal municipalities. There are 618 miles of coastline in Connecticut. The Long Island Sound is Connecticut's largest and most important natural resource.||X||X||X||X|
|RI||Washington||Narragansett Bay||Rhode Island's coastal zone encompasses the entire state, although the inland extent of the Coastal Program's regulatory authority is generally 200 feet inland from any coastal features. Rhode Island has approximately 384 miles of coastline. Narragansett Bay is a major coastal feature in Rhode Island.||X||X||X||X|
|MA||Suffolk||Boston Bay||The official Massachusetts coastal zone includes the land and waters within the seaward limit of the state's territorial sea to generally 100 feet landward of the first major land transportation route encountered (e.g., road, highway, rail line, etc.). The following locations are included in the state's coastal zone: all of Barnstable, Dukes, and Nantucket Counties; tidal rivers and adjacent uplands, at a minimum, to the extent of vegetation affected by measurably saline water; and anadromous fish runs in coastal towns. Coastal zone associated with Boston Bay in Suffolk County is the only coastal resource within the Affected Environment.||X||X||X||X|
The Affected Environment of the existing NEC encompasses more than 8,500 acres of freshwater wetlands. The majority of these wetlands, more than 40 percent, occur in New Jersey and Rhode Island. Approximately 21,270 acres of SFHA exist within the Affected Environment of the existing NEC with the majority occurring in Connecticut and associated with the Long Island Sound.
There are 226 waterbodies present within the Affected Environment of the existing NEC with special water quality designations. Additionally, there are 24 Navigable Waterways within the Affected Environment of the existing NEC.
Coastal resources along the existing NEC include approximately 6,430 acres of saltwater wetlands, associated with: Gunpowder River and Chesapeake Bay in Maryland; Christina River in Delaware; Hackensack River and Hudson River in New Jersey; and the East River and Long Island Sound in New York. The existing NEC travels through designated coastal areas protected by the CZMA in Maryland, Delaware, Pennsylvania, New Jersey, New York, Connecticut, and Massachusetts.
The Affected Environment of Alternative 1 encompasses over 9,300 acres of freshwater wetlands, more than 70 percent of which are classified as Forested/Shrub wetlands. Just over 40 percent of the freshwater wetlands present within the Affected Environment occur in Connecticut and Rhode Island and are associated with resources of Long Island Sound and Narragansett Bay. The Affected Environment of Alternative 1 encompasses over 22,100 acres of SFHA. More than 8,000 acres of affected SFHA are present within the Affected Environment in Connecticut and are associated with the Long Island Sound.
The Affected Environment of Alternative 1 encompasses 239 waterbodies with special water quality considerations. There are 24 Navigable Waterways present within the Affected Environment of Alternative 1, three of which are new proposed crossings.
The Affected Environment of Alternative 1 encompasses over 6,640 acres of saltwater wetlands, which is only 4 percent more acres than are within the existing NEC. Nearly 60 percent of the affected saltwater wetlands are in Connecticut and are associated with Long Island Sound. The majority of the CZMA traversed by the Affected Environment of Alternative 1 are in Connecticut and are associated with the Long Island Sound.
The Affected Environment of Alternative 2 encompasses over 11,400 acres of freshwater wetlands, nearly 70 percent of which are classified as Forested/Shrub wetlands. Just under half of the freshwater wetlands encompassed by the Affected Environment are present in Connecticut and Rhode Island and are associated with resources of Long Island Sound and Narragansett Bay. The Affected Environment of Alternative 2 also encompasses wetlands associated with the John Heinz National Wildlife Refuge in Delaware County, PA. The Affected Environment of Alternative 2 encompasses nearly 26,000 acres of SFHA. More than 9,300 acres of affected SFHA are present within Connecticut, CT, and are associated with the Long Island Sound.
The Affected Environment of Alternative 2 includes 291 waterbodies with special water quality considerations. There are 25 Navigable Waterways within the Affected Environment.
Coastal resources associated with the Affected Environment of Alternative 2 encompass 7,200 acres of saltwater wetlands, which is 12 percent more acres than the existing NEC. Approximately 53 percent of the saltwater wetlands are present in the Affected Environment in Connecticut and are associated with Long Island Sound. The majority of the CZMA traversed by Alternative 2 are in Connecticut and are associated with the Long Island Sound.
Washington, D.C., to New York City
Many water resources are present within the Affected Environment of the Washington, D.C., to New York City portion of Alternative 3. This route option encompasses nearly 5,150 acres of freshwater wetlands. The Affected Environment in Middlesex County, NJ encompasses the highest acreage of freshwater wetlands at approximately 1,060 acres associated with the lower Hudson River. Floodplains (SFHA) are associated with many of these water resources and wetlands. Approximately 13,000 acres of SFHA are present within the Affected Environment of this portion of Alternative 3. Large concentrations of SFHA are associated with the Gunpowder River in Harford County, MD, the Christina and Delaware Rivers in Delaware, the Schuylkill River in Philadelphia, PA, and the Raritan and lower Hudson Rivers in Middlesex County, NJ.
There are 95 waterbodies present within the Affected Environment of this route option that have special water quality designations; 10 waterbodies are considered Navigable Waterways.
Coastal resources associated with this portion of Alternative 3 include approximately 2,530 acres of saltwater wetlands associated with the Back River, Gunpowder River, and Chesapeake Bay in Maryland; the Christina River in Delaware; and the Hackensack and Hudson Rivers in New Jersey. Additionally, this portion of Alternative 3 travels through designated coastal zones that are protected under the CZMA in Delaware, Pennsylvania, and New Jersey.
New York City to Hartford
Via Central Connecticut
This route option encompasses approximately 2,230 acres of freshwater wetlands, most of which are located in New Haven County and Fairfield County, CT, and are associated with the Long Island Sound. Areas of SFHA are also encompasses by the Affected Environment of this route option and are associated with tributaries of the Hudson River in New York and with numerous tributaries that drain to the Long Island Sound in Connecticut. Approximately 7,050 acres of SFHA are present within the Affected Environment of this route option.
There are 116 waterbodies with special water quality designations present within this route option. Seven waterbodies are considered Navigable Waterways.
Coastal resources within this route option include approximately 1,985 acres of saltwater wetlands associated with the Hudson and East Rivers, and the Long Island Sound. This route option also travels through designated coastal zones that are protected under the CZMA in New York and Connecticut.
Via Long Island
This route option is proposed to tunnel underneath the Long Island Sound. The Affected Environment encompasses approximately 1,580 acres of freshwater wetlands associated with the Long Island Sound and the Connecticut River. New Haven County, CT, has the highest acreage of wetlands within this route option at approximately 870 acres. Areas of SFHA are present within the Affected Environment of this route option and are associated with tributaries to the Hudson and Mamaroneck Rivers in New York and tributaries that drain to the Long Island Sound. Approximately 6,450 acres of SFHA are present within the Affected Environment of this route option.
There are 87 waterbodies with special water quality designations present within the Affected Environment of this route option. There are eight Navigable Waterways crossed by the Affected Environment of this route option.
Coastal resources exist within the Affected Environment of this route option and include 6,470 acres of saltwater wetlands associated with the East River, Long Island Sound, Connecticut River, Niantic River and the Thames River. This route option also travels through designated coastal zones that are protected under the CZMA in New York and Connecticut.
Hartford to Boston
This route option encompasses approximately 5,705 acres of freshwater wetlands associated with the Connecticut River, Pawcatuck River, Chapman Pond, and Neponset River. Approximately 8,510 acres of SFHA are present with the Affected Environment and are also associated with these waterbodies. In addition, SFHA associated with Narragansett Bay, Seekonk River, and Central Pond are present within this route option.
There are 131 waterbodies with special water quality designations present within the Affected Environment of this route option. Ten waterbodies are considered Navigable Waterways.
Coastal resources exist within the Affected Environment of this route option and include approximately 40 acres of saltwater wetlands within Suffolk County, MA. This route option also travels through designated coastal zones in Massachusetts.
This route option encompasses approximately 5,820 acres of freshwater wetlands. The majority of the wetlands are associated with the Neponset River in Bristol and Norfolk Counties, MA. Approximately 9,290 acres of SFHA exist within the Affected Environment of this route option and are primarily associated with many streams and tributaries throughout Bristol County, MA, and the Wading River Reservoir.
There are 146 waterbodies with special water quality designations present within the Affected Environment of this route option. Ten waterbodies are considered Navigable Waterways in this route option.
Coastal resources within the Affected Environment are limited to approximately 30 acres of saltwater wetlands in Suffolk County, MA. This route option does not traverse a designated coastal zone.
This section provides an overview of the effects on hydrologic resources of the No Action and Action Alternatives. It presents a general discussion of the types and locations of hydrologic resources affected for each alternative followed by a more specific discussion organized by hydrologic resource on the types of effects that could occur for the various construction types proposed.
Effects on water resources would result from both improvements included as part of the No Action and Action Alternatives. Improvements anticipated under the No Action Alternative could affect water resources occurring within and adjacent to the existing NEC right-of-way. Mitigation and permitting of water resources affected under the No Action Alternative would be the responsibility of project sponsors undertaking those actions.
Table 7.5-8 provides the total number of acres or route miles of water resource that would be affected by the Representative Route of each Action Alternative, and a discussion of the data follows.
|Resource||Alt. 1||Alt. 2||Alternative 3|
|D.C. to NYC||New York City to Hartford||Hartford to Boston|
|via Central Connecticut||via Long Island||via Providence||via Worcester|
|Freshwater Wetlands (acres)||290||450||545||85||100||340||240|
|Saltwater Wetlands (acres)||255||295||190||115||465||105||90|
|Total Wetlands (acres)||540||745||735||200||560||445||330|
|Coastal Zone (route miles)||225||235||115||110||135||50||15|
Alternative 1 would have the least number of impacts to water resources. Nearly 40 percent of impacts to floodplains and wetlands, and 60 percent of impacts to coastal zones, would occur along the coast between New Haven, CT and Washington, RI, with New London, CT having the largest combined total effects resulting primarily from the Old Saybrook-Kenyon bypass.
Alternative 2 would have higher impacts to water resources than Alternative 1 but lesser impacts than Alternative 3. As is the case for Alternative 1, a large portion of the impacts to water resources would occur along the coast of Connecticut; however, the county with the highest number of acres of affected wetlands would be Hartford, CT.
Alternative 2 is the only Action Alternative that would bisect the John Heinz National Wildlife Refuge in Delaware and Philadelphia, PA. The Wildlife Refuge has associated freshwater wetlands and SFHA, is ecologically sensitive and located within a coastal zone.
Washington, D.C., to New York City
Impacts resulting from this route option would differ very little from Alternatives 1 and 2. The greatest impacts would occur along coastal areas associated with the Chesapeake Bay, Delaware Bay and River, and Hudson Bay, although a large number of freshwater wetlands would be affected in Central New Jersey.
New York City to Hartford
Via Central Connecticut
This route option would have considerably fewer impacts to water resources than the Long Island route option particularly with regard to wetlands. On the other hand, there is very little difference between the total acreage of affected SFHA between this routing option and the Long Island routing option.
Via Long Island
This route option would have considerably higher impacts to water resources than the Central Connecticut route option particularly with regard to wetlands. This route option would affect nearly three times the number of acres of wetlands as would the Central Connecticut route option and would traverse through 20 percent more route miles of coastal zone. Much of the impacts would result from the proposed tunnel that would cross Long Island Sound affecting saltwater wetlands, coastal resources, and SFHAs in NY and CT.
Hartford to Boston
This route option would affect just 10 percent fewer acres of SFHA than the Worcester route option, however, approximately 35 percent more acres of wetlands would be affected in RI and MA, and nearly four times as many route miles of coastal zone would be traversed.
This route option would affect 10 percent more acres of SFHA than the Providence route option. The impacts to wetlands and coastal resources would be lesser than those impacts from the Providence route option.
Action Alternatives could affect water resources along the Northeast Coastline. Twenty-four waterbodies were identified as experiencing the greatest combined impact to water resources. Combined impact refers to instances where Environmental Consequences may be aggravated by impacts to multiple hydrologic systems (e.g. wetlands and floodplains). Unless otherwise noted, Table 7.5-9 lists each resource that is navigable, has potentially affected associated wetlands and designated SFHA, and is in regulated coastal zones. The tables also notes the counties identified as being at significant risk from climate change related flooding including sea level rise, storm surge, and riverine flooding. A more detailed discussion and analysis on climate change is provided in Section 7.15. Table 7.5-9 lists those resources crossed by the Representative Route of one or more of the Action Alternatives. Additionally, Table 7.5-9 identifies waterbodies that would be affected by proposed improvements to three stations associated with one or more Action Alternatives, all of which are categorized as existing with proposed improvements. Appendix E, Section E.05, provides quantifiable effects, organized by state and county, for each of the Action Alternatives.
|State||County||Resource||Alt. 1||Alt. 2||Alt. 3||Station ID||Station Name|
|MD||Baltimore City||Chesapeake Bay||—||—||X||—|
|Baltimore County/Harford||Gunpowder River||—||X||—||—|
|DE||New Castle*||Christina River||X||X||X||—|
|New Castle||Brandywine Creek||X||X||X||—|
|New Haven*||West River||X||X||X||—|
|New Haven*||Mill River||X||X||X||—|
|New Haven*||Quinnipiac River||X||X||X||—|
|New Haven*||Mill River||X||X||X||—|
|Middlesex*/New London||Connecticut River||X||X||X||—|
|New London*||Niantic River||X||X||X||—|
|New London*||Thames River||X||X||X||—|
|New London*||Mystic River||X||X||X||—|
|New London*||Stonington Harbor||X||X||X||—|
|CT/RI||New London*/ Washington*||Pawcatuck River||X||X||X||123||Westerly|
|Suffolk||Fort Point Channel||X||X||X||143||Boston South Station|
The potential for construction-related impacts, both temporary and permanent, differs depending on the expected construction type. The six primary construction types are Bridge, At-Grade, Embankment, Trench, Tunnel, and Aerial Structure. A discussion of the types of temporary and permanent Environmental Consequences associated with each construction type for each water resource follows.
Temporary construction impacts that involve land-disturbing activities (including the placement of fill) and may cause soil erosion, sedimentation, and stormwater runoff are regulated and may be restricted, prohibited, and/or require special permits. Erosion and sedimentation may result in degradation of aquatic habitat, species, and food sources. Long-term construction impacts that involve land-disturbing activities and that may cause destruction of animal habitat and increased runoff volume caused by an increase in impervious surface and pollution load are also regulated and may be restricted, prohibited, and/or require special permits. Other potential impacts include an alteration of stream discharge caused by silt loading, increased siltation downstream of stream crossings, increased nutrient loading from runoff during construction, destabilization of water temperature, alteration of water levels and flows, and increased potential for toxic substance release from construction vehicles or equipment. These impacts may result in degradation of water quality and aquatic habitat.
Construction of bridges and aerial structures has the greatest potential to affect Navigable Waterways. Close coordination with the U.S. Army Corps of Engineers and U.S. Coast Guard is required for any proposed new crossing of a Navigable Waterway to ensure that the crossings are designed so that travel is not impeded either temporarily during construction or permanently.
The potential for construction-related impacts differ depending on the expected construction type. Construction that involves buildings, dredging, filling, paving, and excavation within the designated floodplain, may divert flow, cause erosion and sedimentation, and/or cause an increase in the Base Flood Elevation (BFE). These activities are regulated and may be restricted, prohibited, and/or require special permits. However, areas where the Representative Route of an Action Alternative includes tunnel-type construction and crosses a floodplain are not counted as an impact in the quantification of floodplain impact.
Temporary construction impacts that would involve placing fill material in the designated wetland area and might cause soil erosion, sedimentation, or increased risk of contamination associated with presence of heavy equipment is regulated and may be restricted, prohibited, and/or require special permits. Long-term construction impacts that would involve clearing vegetation or adding fill and might cause destruction of animal habitat is also regulated and may be restricted, prohibited, and/or require special permits. Other potential impacts include changes in light incidence and water clarity and changes in and destabilization of water temperature caused by increased light incidence from vegetation removal, and alteration of water levels and flows due to interruptions and/or additions to surface or groundwater flow. However, areas where the Representative Route of an Action Alternative includes tunnel-type construction and crosses a saltwater wetland are not counted as an impact in the quantification of saltwater wetland impact.
The potential for construction-related impacts differs depending on the expected construction type. Temporary construction impacts that involve the clearing of vegetation or soil exposure and may cause soil erosion, sedimentation, or increased risk of contamination associated with presence of heavy equipment are regulated and may be restricted, prohibited, and/or require special permits. Long-term construction impacts in coastal areas that may cause destruction of animal habitat or degradation to circulation, natural erosion, or existing drainage patterns are also regulated and may be restricted, prohibited, and/or require special permits.
Development within the jurisdictional CZMA boundaries requires a Federal Consistency Certification. The federal consistency review is based on the enforceable policies of the state CZMA. Each state's Coastal Zone Management Plan is applicable in those areas within its jurisdiction-all portions of the route within the coastal zone management boundary are included. A summary of each state's enforceable policies as they relate to potential Environmental Consequences and effects from the Action Alternatives are as follows:
Numerous water resources are located within the Context Area. Some of the larger water resources for each state include the Chesapeake Bay, Patuxent River and Susquehanna River in Maryland; Delaware River in Delaware and Pennsylvania; Assunpink Creek and lower Hudson River in New Jersey; Mamaroneck and Cross Rivers in New York; major tributaries to the Long Island Sound, Connecticut River, Connecticut Coastal (Atlantic Ocean) in Connecticut; Pawcatuck River, Chapman Pond and Scituate Reservoir in Rhode Island; and the Charles River and Neponset River in Massachusetts. Many of these water resources have associated wetlands, floodplains, coastal zones, and navigable waterways.
Potential mitigation strategies to address adverse effects on hydrologic resources are presented below by specific topic. Many of the strategies discussed are most appropriate during the design and construction phases of a project.
Temporary construction access into the wetlands should be limited to the maximum extent practicable. Implementing appropriate soil erosion and sediment control measures-using timber mats, and minimizing compression of the soil-will lessen the severity of the temporary impact. All areas temporarily disturbed should be restored to pre-construction elevations using appropriate soil types and will be replanted with native wetland vegetation. Where permanent impacts are unavoidable, the Tier 2 project proponents should apply the following compensatory mitigation concepts:
Analysis presented in this Tier 1 Draft EIS is based on readily available information and mapping. As such, the FRA did not undertake any field investigations to confirm resources identified. During subsequent Tier 2 analysis, site-specific identification of hydrologic resources and assessment of the extent of effects are necessary. Considerations pertaining to coordination and permitting that may be required as parts of the Tier 2 analysis are provided below for each water resource subcategory.
Federal statutes governing watersheds and surface water quality include the following:
The NPDES is administered by the EPA; however, the NPDES permit program is administered by authorized states. For all jurisdictions, the presence of CWA Section 303(d) must be determined and the jurisdictions must establish priority rankings and develop Total Maximum Daily Loads for these waters. In addition to the NPDES regulations, many states have additional regulations regarding water quality and stormwater management. Table 7.5-10 discusses additional state regulations.
|Geography||Water Quality/Stormwater Management Considerations for Tier 2 Analysis|
|D.C.||District Department of the Environment
Chapter 5 of Title 21 of the D.C. Municipal Regulations establishes regulations pertaining to water quality and pollution. The regulations aim to prevent and control:
|MD||Department of the Environment
In Maryland, higher pollutant removal or environmental performance than the minimum standards established in the Maryland Stormwater Management Design Manual is needed to fully protect aquatic resources and/or human health and safety within a high valued watershed or receiving water. Watershed classifications that are required to meet higher standards include:
|DE||Department of Natural Resources and Environmental Control, Division of Watershed Stewardship
Section 7400 of Title 7 Natural Resources and Environmental Control of the DE Administrative Code established surface water quality standards and designated uses for the defined watersheds included the following uses:
|PA||Department of Environmental Protection, Bureau of Land and Water Conservation
25 Pa Code 93.9 designates water uses and water quality criteria for surface waters in Pennsylvania. Under PA DEP Chapter 102 Regulations, any project proposing earth disturbance activities is required to develop and implement a written Post Construction Stormwater Management (PCSM) plan. The PCSM design shall be planned according to the following principles:
|NJ||Department of Environmental Protection and Department of Agriculture, Division of Agricultural and Natural Resources
The New Jersey Surface Water Quality Standards (N.J.A.C. 7:9B) designate water uses and water quality criteria for surface waters in New Jersey. Projects discharging into surface waters classified as FW1 and Category one (C1) are required to meet more stringent stormwater runoff quality criteria. C1 waters are those that are protected from measurable changes in water quality based on their exceptional ecological, recreational, water supply or fisheries resources significance. FW1 waters are those waters that are to be maintained in their natural state of quality (set aside for posterity) and not subject to any manmade wastewater discharges or increases in runoff from anthropogenic activities.
|NY||Department of Environmental Conservation, Division of Water
In New York State, waterbodies are assigned a "best use" classification:
|CT||Department of Energy and Environmental Protection, Water Division
The Connecticut Water Quality Standards divided surface water into three classifications that include inland surface waters, coastal and marine surface waters, and groundwater. Construction general permits apply to construction activities which result in the disturbance of one or more acres of land area on a site.
|RI||Department of Environmental Management, Stormwater Program
The Rhode Island Office of Water Resources implements the State's Water Quality Standards Program. Surface waters are assigned the as designated uses that include freshwater and seawater. General permits for construction activities apply to construction activities which disturb one or more acres of land. In Rhode Island, there are other regulatory mechanisms to control erosion and sedimentation as required by the Rhode Island Department of Environmental Management Freshwater Wetlands, Water Quality Certification Programs, the Coastal Resources Management Council, and in towns and cities that have a Qualifying Local Program that have been formally approved by the Rhode Island Department of Environmental Management and the Rhode Island Pollutant Discharge Elimination System Program.
|MA||Department of Environmental Protection, Water, Wastewater & Wetlands and Bureau of Resource Protection
The Massachusetts Department of Environmental Protection issued the Stormwater Management Standards to address water quality and water quantity which includes pollution, flooding, low base flow and recharge. More stringent requirements are in place for critical areas. Critical Areas include:
Wetlands and surface waters fall under the broad category of "Waters of the United States," as defined in 33 CFR 328.3 and in accordance with provisions of Section 404 of the Clean Water Act (CWA) (33 USC 1344). These waters are regulated by the USACE. Any action that proposes to dredge or place fill material into surface waters or wetlands is subject to these provisions. The USACE issues general and individual permits. In issuing permits, the USACE must comply with the Section 404(b)(1) Guidelines (40 CFR Part 230), which generally require selection of the practicable alternative that causes the least harm to the aquatic ecosystem.
In New Jersey, the New Jersey Department of Environmental Protection (NJDEP) has assumed the USACE's responsibility for administering the Section 404 permitting program. Therefore, Section 404 permits in New Jersey are issued by NJDEP rather than USACE, pursuant to the same legal standards that apply to the USACE.
Each state in the Study Area has enacted laws and regulations to protect wetlands and regulate activities impacting certain types of wetlands as defined by each state. The following laws and programs with the corresponding state oversight agencies must be considered as part of the Tier 2 analysis:
Massachusetts Wetlands Protection Act - Massachusetts Department of Environmental Protection
U.S. Coast Guard (USCG) bridge permits are required for the construction or modification of a bridge or causeway across a Navigable Waterway of the United States. A bridge permit is the written approval of the location and plans of the bridge or causeway to be constructed or modified. Federal law prohibits the construction of these structures unless authorized by the USCG. Coordination with the USCG should be initiated in the early stages of development of the project and continue throughout the development of the project.
The Federal Emergency Management Agency administers the National Flood Insurance Program and is charged with identifying and delineating SFHAs. Floodplain management permits are typically obtained at a local level. Municipalities maintain floodplain management ordinances that meet minimum federal regulations and often require more restrictive provisions based on additional state, county, and local requirements. For areas where floodplains may be affected, specific information about the type of development, size of development, the SFHA zone and proposed elevation must be provided to obtain a permit.
As part of the President's Climate Action Plan, the President released Executive Order 13690, Establishing a Federal Risk Management Standard and Process for Further Soliciting and Considering Stakeholder Input (FFRMS). FFRMS requires all future federal investments in and affecting floodplains to meet the level of resilience as established by the Standard.
Tier 2 analysis will further define the effects on floodplains and determine the actual results of encroaching/filling identified floodplains at specific locations, as well as include the development of mitigation measures and designs that would avoid or minimize the effects on floodplains. Additionally, requirements of FFRMS will be integrated into subsequent analysis to ensure adherence to resiliency standards pertaining to floodplains.
Coastal resources are protected at the federal level by the CZMA. Under the CZMA, direct federal actions, federal license or permit activities, and federal financial assistance activities that have reasonably foreseeable coastal effects must be consistent with the enforceable policies of state coastal management programs. For development within a designated coastal zone, a Coastal Zone Federal Consistency Certification will be required.
The following state agencies have jurisdiction over review and approval of coastal zone consistency determinations and further coordination with each entity will be required as part of the Tier 2 analysis: