Northern Research Station
One Gifford Pinchot Drive
Madison, WI 53726
(608) 231-9544 TTY/TDD
County: Warren and McKean
Description: The Tionesta RNA and the adjacent Tionesta Scenic Area constitute one of the few remaining examples of the virgin hemlock-beech climax forest of the Allegheny Plateau. The site contains many species that are uncommon at this latitude. There is no recorded history of logging or fire in the RNA, but oil wells and pipelines were installed throughout the region, a few of which are still active. Severe windstorms damaged the southern edge of the RNA in 1808. Severe ice storms caused widespread damage in 1936 and 1950. In 1985 tornadoes blew down 954 acres of the Scenic Area. Two rare species in Pennsylvania are found within this RNA: Swainson’s thrush and yellow-bellied flycatcher.
Nearest weather station, with distance and direction from RNA : A station at Bradford, PA is located 24 miles (38 km) northeast of the RNA.
Annual precipitation (type, seasonal distribution) : Average annual precipitation is 42 inches (107 cm), 16 inches (41 cm) of which falls between June and October.
Maximum and minimum temperatures : Average annual temperature is 46°F, with average summer temperature of 66°F.
Elevation: Elevation ranges from 1550 feet (506m) to 1980 feet (647 m).
Geology and Soils: The site consists of steep-sided, narrow, lower stream valleys cut into a plateau. Soils are derived from the Pottsville sandstone and conglomerate that cap the plateau and form shales and sandstones on the slopes. Principal soil series are Hazelton sandy loam, Cookport sandy loam and Cavode silt loam. G-17, shale and sandstone.
Aquatic Features: West Fork Run and East Fork Run traverse the RNA, running generally from northeast to southwest. Both are permanent streams at elevations below about 1700 feet (West Fork) and 1800 feet (East Fork). Tributaries of the South Branch of Tionesta Creek, a branch of the Allegheny River, drain the tract.
Section: Northern Unglaciated Allegheny Plateau (212 G)
Subsection(s): Allegheny High Plateau (212Ga)
|SAF Cover Types (list acres):||Kuchler Types (list acres):|
|23 Eastern hemlock (1644)|
|25 Sugar maple-beech-yellow birch (19)|
|28 Black cherry- sugar maple (50)|
|60 Beech-sugar maple (400)|
Complete Plant List
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Common Shrub Species: Hobblebush (Virburnum alnifolium), maple-leaved viburnum (Viburnum acerifolium).
Common Herbaceous Species: Spinulose wood-fern, Shining club-moss.
Common Mammal Species: Eastern chipmunk (Tamias striatus), Porcupine (Erethizon dorsatum), Black bear (Ursus americanus), white tailed deer, bobcat, hoary bat.
Common Bird Species: Hawks, owls, herons, kingfishers, woodpeckers, warblers, wild turkey, pileated woodpecker, blackburnian warbler, barred owl, red-shouldered hawk, swainson’s thrush, brown creepers, red-breasted nuthatch, white-breasted nuthatch.
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Last Modified: 10/18/2013