RNA: Tight Hollow
Forest: Daniel Boone
Established: 1992? Uncertain if approved by Chief of USFS. Proposed and approved by Regional Forester John Alcock on September 25, 1985.
Acres: 469 acre area
Click here, to view a searchable map for the Tight Hollow RNA
Ecological/Physical Description: Tight Hollow RNA is within the Red River Gorge Geological Area and contains one of the few (72 acres) remaining uncut stands of forest of yellow-poplar-eastern hemlock in the region. It is a tract of predominantly old growth hemlock-mixed mesophytic containing a number of threatened and endangered flora and fauna within the cliff section of the Appalachian Plateaus. Tight Hollow consists of several adjacent mesic sandstone gorges. Elevations vary approximately 340 feet (104m) from mouth of the gorge to the gorge rim. At establishment time, Tight Hollow is home of the “Kentucky Big Tree,” a bigleaf magnolia (Magnolia macropylla Michx.) designated as co–national champion.
Physical and Climatic Conditions
Nearest weather station, with distance and direction from RNA:
Annual precipitation (type, seasonal distribution): Annual precipitation is 46.96 inches, ranging from a mean of 2.31 inches (Oct) to a mean of 4.81 inches (Jul)
Maximum and minimum temperatures: Average Annual temperature is 56.7 F, ranging from mean temperature of 34.7 F (Jan) to a mean temperature of 76.3 F (Jul).
Elevation: Elevations range from 920 feet (280 m) at the base of the gorge to 1260 feet (384 m) at the upper edge of the cliff face. Elevational estimates vary depending on what one considers the base of the gorge. Estimates vary from 240 (83 m) to 340 feet (104 m) from mouth of the gorge to the gorge rim.
Geology and Soils: The Geology of Tight Hollow is mostly the Corbin Sandstone Member of the Lee Formation (Plc). The higher elevations adjacent to Tight Hollow are shales of the Upper Member of the Breathitt Formation (Pbu). Plc: Sandstone (60%), conglomeratic sandstone (35%). Pbu; Shale and siltstone 990%), sandstone (~10%) and coal. Additional descriptions are in establishment record.
The soils of Tight Hollow above 1,100 ft are mostly Alticrest–Ramsey–Rock (ArF) outcrop complex, 20–65 percent slopes and the soils below 1,100 feet are mostly Helechawa–Rock (HeF) outcrop complex, 35–55 percent slopes. Additional descriptions are in establishment record.
Aquatic Features: The area is dissected by one major and three minor streams (Herman and See 1973). The RNA contains Tight Hollow Creek and its tributaries. The headwaters of some tributaries are on private land beyond the cliff line.
Plant Communities: Tight Hollow has “Kentucky Big Tree,” big leaf magnolia (Magnolia macrophylla Michx.) (181 index points) and has been designated as a co–national champion.
SAF Cover Types (acres):
yellow-poplar-eastern hemlock - #58 (283)
|At Risk Species:
|Neotoma floridana magister
Common Shrub Species: please see establishment record
Common Herbaceous Species: please see establishment record
Common Mammal Species: please see establishment record
Common Bird Species: please see establishment record
Related Reports and Publications:
Additional reports and publications can also be found by clicking on the “RNA Publications and Products” link in the site menu or by clicking here.
Last Modified: 9/29/2015 by Mary Mallinson Long (firstname.lastname@example.org)