New York Natural Heritage Program
Confined River
Confined river at Plattekill Creek Andy Finton
System: Riverine
SubSystem: Natural Streams

State Protection: Not Listed
Federal Protection: Not Listed

State Rarity Rank: S3S4
A State Rarity Rank of S3S4 means: Vulnerable in New York, or Apparently Secure - Vulnerable to becoming imperiled in New York, with relatively few populations or locations, few individuals, and/or restricted range; or uncommon but not rare in New York; may be rare in some parts of the state; possibly some cause for long-term concern due to declines or other factors. More information is needed to assign a single conservation status.

Global Rarity Rank: G4
A Global Rarity Rank of G4 means: Apparently secure globally, though it may be quite rare in parts of its range, especially at the periphery.


Did you know?
Common features of confined rivers include plunge pools, flumes, chutes, cascades, alluvial fans, and mussel beds. The predominant source of energy is generated in the stream. These streams have high water clarity, are well oxygenated, and typically have cool water.

State Ranking Justification [-]
There are probably several hundred occurrences statewide. Many documented occurrences have good viability and are protected on public land or private conservation land. This community has statewide distribution, and includes several high quality examples. The current trend of this community is probably stable for occurrences on public land, or declining slightly elsewhere due to moderate threats related to development pressure or alteration to the natural hydrology.

Short-term Trends [-]

Long-term Trends [-]