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USDA Forest Service
1400 Independence Avenue SW
Washington, D.C.
20250-0003
(202) 205-8333

Great Gulf Wilderness






General Information

Image of Great Gulf Wilderness

State(s): New Hampshire

County(s): Coos

Forest Service Administrative Unit(s):
Eastern Region (Region 9) -- White Mountain National Forest

Size: 5552 acres

Elevation Range: 1,680 - 5,807 feet

Image(s): http://www.wilderness.net/images/

Detailed wilderness information: http://www.wilderness.net

GIS Map/Official Boundary: http://www.wilderness.net/NWPS/

Webcam(s): Great Gulf (Gallery)

Data: 
  Links





Resource Concern Thresholds

AQRV Type: VISIBILITY
Region Sensitive Receptor Sensitive Receptor Indicator Concern Thresholds Upper Limit Lower Limit Units Comments
R9 Representative Site Haziness Change 0.5   Deciviews  

AQRV Type: WATER
Region Sensitive Receptor Sensitive Receptor Indicator Concern Thresholds Upper Limit Lower Limit Units Comments
R9 Perennial Streams Chronic Acid Neutralizing Capacity Maintain Biological Function   25 Microequivalents Per Liter >
R9 Perennial Streams Episodic Acid Neutralizing Capacity Maintain Biological Function   25 Microequivalents Per Liter >

Pollutant Exposure Concern Thresholds

Region Pollutant Exposures Level Name Comments Upper Limit Lower Limit Units Pollutant Averaging AQRV Sensitive Receptor Sensitive Receptor Indicator
R9 Nitrogen Deposition SCREENING VALUES 20 5 Kilograms Per Hectare - Year Annual Flora Soils Soil Chemistry
R9 Ozone N100 Metric Number of hours greater than or equal to 0.100 ppm. 1   Hours April-September Flora Ozone Sensitive Species Biomass Reduction
R9 Sulfur Deposition SCREENING VALUES 20 5 Kilograms Per Hectare - Year Annual Flora Soils Soil Chemistry
R9 Sulfur Deposition   14 6 Kilograms Per Hectare - Year Annual Water Aquatic Organisms Chemistry
R9 Sulfur/Nitrogen Deposition Red Line - S + 20% N produces ANC 10 ueq/l or less. Green Line - S + 20%N produces ANC 25ueq/l or more 16 7 Kilograms Per Hectare - Year Annual Water Aquatic Organisms Chemistry

Natural and Current Background Visibility

Site Specific Rayleigh scattering coefficient: 11 Clearest 20% Natural Clearest 20% 2000-2004 Baseline Haziest 20% Natural Haziest 20% 2000-2004 Baseline Average Annual Natural Annual Average 2000-2004 Baseline
Standard Visual Range (km) 289 191 122 40 203 101
Haze Index (dv) 3.73 7.66 11.99 22.82 7.07 13.77
For more information on these numbers, click here.


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