Colorado Front Range Fuel Photo 

Michael A. Battaglia

Jonathan M. Dodson

Wayne D. Shepperd

Mark J. Platten

Owen M. Tallmadge

General Technical Report RM

R

S-GTR-15

5

W

W

W

United States Department of AgricultureForest ServiceRocky Mountain Research StationJune 2005
Battaglia, Michael A.; Dodson, Jonathan M.; Shepperd, Wayne 

D.; Platten, Mark J.; Tallmadge, Owen M. 2005. Colorado Front Range fuel photo series. Gen. Tech. Rep. RMRSGTR-155WWW. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station.

Abstract—This photo series was developed to help fire 

managers estimate ground and surface fuel loads that exist in cover types of the Southern Colorado Front Range wildland-urban interface. Photos and associated data representing low, medium, and high fuel loadings from this study are presented by forest type, along with examples of typical or median fuel loadings that were encountered.
Colorado Front Range Fuel Photo 

Background

Assessment of the quantity and type of 

fuels present in a forest is important for prescribed burning activities, developing fuel management prescriptions, and assessing wildfire risk. This photo series was developed to help fire managers estimate ground and surface fuel loads that exist in cover types of the Southern Colorado Front Range wildland-urban interface. 

Data and photos presented in this series were 

collected in 2001 at the Manitou Experimental Forest near Woodland Park, CO, which is representative ofthe montane ponderosa pine zone in the Colorado FrontRange. Elevations of sample sites range from 7,500 to 9,300 ft. Plots were laid out along a grid of pre-selectedGPS coordinates in three different physiographic areas of the Experimental Forest: the Trout Creek area where a total of 313 permanent plots were established over 2,400 ac; the Hotel Gulch area with a total of 117 permanent plots established over 1,200 ac; and the Rampart Range area with a total of 49 permanent plots were established over 343 ac. All sites sampled in this study had been subjected to harvests that occurred in the late 1800s at the time of European settlement.

A planar intersect sa

technique (Brown and othused to sample fuel loadiThis technique inventoriediameter and time responsummarizes results in dry response class. All downwere measured on each oriented transect. One-homeasured within the first fuels in the first 10 ft, and 35 ft of the transect. Thretaken within the first 3.28 center. Duff depths were plot center. 

Pho

The intent of this ph

with a reference to Colorthat is useful in estimatinmanagement planning. P

representing low, mediumthis study are presented examples of typical or meencountered.

1Brown, J.K., Oberhau, R.D., Johnston, C.M. 1982. Handbook for inventorying surface fuels and biomasRep. INT-129. Ogden, UT: U.S. Department of Agriculture, Forest Service, Intermountain Forest and Ra
Colorado Front Range Photo Se

Forest Type: Meadow Fuels Class: Low

Number of Plots: 12 Number of Plots

 Tree Data  Saplings Mature trees

Most Common Species -- --

Second Most Common -- --

Trees per acre N/A 0

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir -- --

Engelmann Spruce -- --

Limber Pine -- --

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) -- --

Site Data Slope Elevation

6 % 7500 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0 -- --0.25"-0.99" 0 -- --1"-2.99" 0 -- --3" + 0 0 0Plot Total 0Fuel DepthLitter 0 InchesDuff 0 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Meadow Fuels Class: Mediu

Number of Plots: 12 Number of Plots

 Tree Data  Saplings Mature trees

Most Common Species -- --

Second Most Common -- --

Trees per acre N/A 0

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir -- --

Engelmann Spruce -- --

Limber Pine -- --

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) -- --

Site Data Slope Elevation

5 % 7500 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0 -- --0.25"-0.99" 0.3 -- --1"-2.99" 0 -- --3" + 3.65 1.45 2.2Plot Total 3.95Fuel DepthLitter 1 InchesDuff 0 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Meadow Fuels Class: High

Number of Plots: 12 Number of Plots: 1

 Tree Data  Saplings Mature trees

Most Common Species -- --

Second Most Common -- --

Trees per acre N/A 0

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir -- --

Engelmann Spruce -- --

Limber Pine -- --

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) -- --

Site Data Slope Elevation

3 % 7500 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0 -- --0.25"-0.99" 0.9 -- --1"-2.99" 2.9 -- --3" + 4.9 3.2 1.7Plot Total 8.7Fuel DepthLitter 2 InchesDuff 0.1 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Meadow Fuels Class: Mea

Number of Plots: 12 Number of Plots:

 Tree Data  Saplings Mature treesMost Common Species -- --Second Most Common Species -- --Trees per acre 0 0Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir -- --

Engelmann Spruce -- --

Limber Pine -- --

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) -- --

Site Data Slope Elevation

23 % 9118 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0.1 -- --0.25"-0.99" 0.3 -- --1"-2.99" 1.5 -- --3" + 0 0 0Plot Total 1.8Fuel DepthLitter 0.7 InchesDuff 0.1 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Fuel Class

Meadow Fuel Classes

Low:0 tons/acHigh:8.7tons/ac
Colorado Front Range Photo Se

Forest Type: Spruce Fuels Class: Low

Number of Plots: 14 Number of Plots: 6 

 Tree Data  Saplings Mature trees

Most Common Species -- Blue Spruce

Second Most Common -- Douglas Fir

Trees per acre 0 262

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce 240 80 ft2

Douglas Fir 22 20 ft2

Engelmann Spruce -- --

Limber Pine -- --

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) 262 100 ft2

Site Data Slope Elevation

45 % 8329 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0.1 -- --0.25"-0.99" 0 -- --1"-2.99" 2.9 -- --3" + 0 0 0Plot Total 3Fuel DepthLitter 0 InchesDuff 0.1 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Spruce Fuels Class: Mediu

Number of Plots: 14 Number of Plots: 

 Tree Data  Saplings Mature trees

Most Common Species Engelmann Engelmann

Second Most Common Aspen --

Trees per acre 1800 105

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir -- --

Engelmann Spruce 105 40 ft2

Limber Pine -- --

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) 105 40 ft2

Site Data Slope Elevation

26 % 9144 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0.6 -- --0.25"-0.99" 1.2 -- --1"-2.99" 5.8 -- --3" + 6.7 5.3 1.4Plot Total 14.3Fuel DepthLitter 1.3 InchesDuff 0.1 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Spruce Fuels Class: Hig

Number of Plots: 14 Number of Plots: 

 Tree Data  Saplings Mature trees

Most Common Species Aspen Engleman

Second Most Common Pice/Pifl --

Trees per acre 1800 1156

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir -- --

Engelmann Spruce 1156 120 ft2

Limber Pine -- --

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) 1156 120 ft2

Site Data Slope Elevation

40 % 9183 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0.6 -- --0.25"-0.99" 0.3 -- --1"-2.99" 2.9 -- --3" + 28.3 0 28.3Plot Total 32.1Fuel DepthLitter 6.3 InchesDuff 1 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Spruce Fuels Class: Mea

Number of Plots: 14 Number of Plots: 

 Tree Data  Saplings Mature trees

Most Common Species Engelmann Engelmann

Second Most Common -- Aspen

Trees per acre 2700 2224

Species Composition

Trees/ac Basal area

Aspen 30 20 ft2

Blue Spruce -- --

Douglas Fir -- --

Engelmann Spruce 2194 120 ft2

Limber Pine -- --

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) 2224 140 ft2

Site Data Slope Elevation

8 % 9260 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0.9 -- --0.25"-0.99" 0.9 -- --1"-2.99" 0 -- --3" + 9.9 0 9.9Plot Total 11.7Fuel DepthLitter 1.7 InchesDuff 2.1 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Fuel Class

Spruce Fuel Classes

Low:3tons/acHigh:32.1tons/ac
Colorado Front Range Photo Se

Forest Type: Lodgepole Pine Fuels Class: Lo

Number of Plots: 27 Number of Plots

 Tree Data  Saplings Mature trees

Most Common Species -- Lodgepole

Second Most Common -- --

Trees per acre 0 401

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir -- --

Engelmann Spruce -- --

Limber Pine -- --

Lodgepole Pine 401 140 ft2

Ponderosa Pine -- --

Total (per acre) 401 140 ft2

Site Data Slope Elevation

12 % 9342 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0.2 -- --0.25"-0.99" 0.3 -- --1"-2.99" 0 -- --3" + 0 0 0Plot Total 0.5Fuel DepthLitter 1 InchesDuff 0.1 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Lodgepole Pine Fuels Class: M

Number of Plots: 27 Number of Plo

 Tree Data  Saplings Mature trees

Most Common Species -- Lodgepole

Second Most Common -- --

Trees per acre 0 211

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir -- --

Engelmann Spruce -- --

Limber Pine -- --

Lodgepole Pine 211 100 ft2

Ponderosa Pine -- --

Total (per acre) 211 100 ft2

Site Data Slope Elevation

9 % 9322 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0.2 -- --0.25"-0.99" 1.8 -- --1"-2.99" 4.4 -- --3" + 1.5 1.5 0Plot Total 7.9Fuel DepthLitter 1 InchesDuff 0.1 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Lodgepole Pine Fuels Class: 

Number of Plots: 27 Number of Plot

 Tree Data  Saplings Mature trees

Most Common Species -- Lodgepole

Second Most Common -- Psme/Pice

Trees per acre 0 271

Species composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir 16 20 ft2

Engelmann Spruce 13 20 ft2

Limber Pine -- --

Lodgepole Pine 242 100 ft2

Ponderosa Pine -- --

Total (per acre) 271 140 ft2

Site Data Slope Elevation

10 % 9383 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0.2 -- --0.25"-0.99" 0.3 -- --1"-2.99" 7.3 -- --3" + 18.3 9.8 8.5Plot Total 26.1Fuel DepthLitter 1 InchesDuff 0.7 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Lodgepole Pine Fuels Class: M

Number of Plots: 27 Number of Plo

 Tree Data  Saplings Mature trees

Most Common Species Lodgepole Lodgepole

Second Most Common -- --

Trees per acre 600 145

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir -- --

Engelmann Spruce -- --

Limber Pine -- --

Lodgepole Pine 145 120 ft2

Ponderosa Pine -- --

Total (per acre) 145 120 ft2

Site Data Slope Elevation

7 % 9352 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0.2 -- --0.25"-0.99" 0.3 -- --1"-2.99" 0 -- --3" + 7.9 6.2 1.7Plot Total 8.4Fuel DepthLitter 1 InchesDuff 0 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Fuel Class

Lodgepole Pine Fuel Classe

Low:0.5tons/acHigh:26.1tons/ac
Colorado Front Range Photo Se

Forest Type: Limber Pine Fuels Class: Lo

Number of Plots: 18 Number of Plot

 Tree Data  Saplings Mature trees

Most Common Species -- Limber Pine

Second Most Common -- Lodgepole

Trees per acre 0 56

Species compositon 

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir -- --

Engelmann Spruce -- --

Limber Pine 43 40 ft2

Lodgepole Pine 13 20 ft2

Ponderosa Pine -- --

Total (per acre) 56 60 ft2

Site Data Slope Elevation

3 % 9345 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0 -- --0.25"-0.99" 0.3 -- --1"-2.99" 2.9 -- --3" + 0 0 0Plot Total 3.2Fuel DepthLitter 0 InchesDuff 0 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Limber Pine Fuels Class: Med

Number of Plots: 18 Number of Plot

 Tree Data  Saplings Mature trees

Most Common Species Aspen Limber Pine

Second Most Common Limber Lodgepole

Trees per acre 2100 165

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir 13 20 ft2

Engelmann Spruce -- --

Limber Pine 118 60 ft2

Lodgepole Pine 34 40 ft2

Ponderosa Pine -- --

Total (per acre) 165 120 ft2

Site Data Slope Elevation

4 % 9403 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0.4 -- --0.25"-0.99" 1.2 -- --1"-2.99" 2.9 -- --3" + 6.1 0 6.1Plot Total 10.6Fuel DepthLitter 1 InchesDuff 0.4 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Limber Pine Fuels Class: Hi

Number of Plots: 18 Number of Plots

 Tree Data  Saplings Mature trees

Most Common Species BL Spruce Limber Pine

Second Most Common Limber Blue Spruce

Trees per acre 1500 426

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce 16 20 ft2

Douglas Fir -- --

Engelmann Spruce -- --

Limber Pine 409 140 ft2

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) 426 160 ft2

Site Data Slope Elevation

2 % 9275 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0.2 -- --0.25"-0.99" 1.8 -- --1"-2.99" 7.3 -- --3" + 16.5 2.4 14.1Plot Total 25.8Fuel DepthLitter 0 InchesDuff 0.5 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Limber Pine Fuels Class: Me

Number of Plots: 18 Number of Plots

 Tree Data  Saplings Mature trees

Most Common Species Aspen Limber Pine

Second Most Common -- Engelmann

Trees per acre 1200 262

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir 16 20 ft2

Engelmann Spruce 45 20 ft2

Limber Pine 201 120 ft2

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) 262 160 ft2

Site Data Slope Elevation

11 % 9282 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0.5 -- --0.25"-0.99" 2.4 -- --1"-2.99" 4.4 -- --3" + 0 0 0Plot Total 7.3Fuel DepthLitter 1 InchesDuff 0.5 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Fuel Class

Limber Pine Fuel Classes

Low:3.2tons/acHigh:25.8tons/ac
Colorado Front Range Photo Se

Forest Type: Ponderosa Pine Fuels Class: 

Number of Plots: 332 Number of Plots: 

 Tree Data  Saplings Mature trees

Most Common Species -- Ponderosa 

Second Most Common -- --

Trees per acre N/A N/A

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir -- --

Engelmann Spruce -- --

Limber Pine -- --

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) N/A 100 ft2

Site Data Slope Elevation

0 % 7500 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0 -- --0.25"-0.99" 0 -- --1"-2.99" 0 -- --3" + 0 0 0Plot Total 0Fuel DepthLitter 0 InchesDuff 0 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Ponderosa Pine Fuels Class: M

Number of Plots: 332 Number of Plo

 Tree Data  Saplings Mature trees

Most Common Species -- Ponderosa

Second Most Common -- --

Trees per acre N/A N/A

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir -- --

Engelmann Spruce -- --

Limber Pine -- --

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) N/A 60 ft2

Site Data Slope Elevation

5 % 7500 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0 -- --0.25"-0.99" 1.2 -- --1"-2.99" 1.5 -- --3" + 8.5 0 8.5Plot Total 11.2Fuel DepthLitter 1.3 InchesDuff 0.2 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Ponderosa Pine Fuels Class: 

Number of Plots: 332 Number of Plots

 Tree Data  Saplings Mature trees

Most Common Species -- Ponderosa 

Second Most Common -- --

Trees per acre N/A N/A

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir -- --

Engelmann Spruce -- --

Limber Pine -- --

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) N/A 140 ft2

Site Data Slope Elevation

10 % 7500 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0.2 -- --0.25"-0.99" 5.2 -- --1"-2.99" 14.5 -- --3" + 1.2 1.2 0Plot Total 21.1Fuel DepthLitter 4 InchesDuff 0.5 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Ponderosa Pine Fuels Class: M

Number of Plots: 332 Number of Plo

 Tree Data  Saplings Mature trees

Most Common Species -- --

Second Most Common -- --

Trees per acre -- --

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir -- --

Engelmann Spruce -- --

Limber Pine -- --

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) -- 80 ft2

Site Data Slope Elevation

10 % 7500 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0 -- --0.25"-0.99" 1.2 -- --1"-2.99" 2.9 -- --3" + 0 0 0Plot Total 4.1Fuel DepthLitter 1 InchesDuff 0 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Fuel Class

Ponderosa Pine Fuel Classe

Low:0tons/acHigh:21.1tons/ac
Colorado Front Range Photo Se

Forest Type: Quaking Aspen Fuels Class: 

Number of Plots: 10 Number of Plot

 Tree Data  Saplings Mature trees

Most Common Species Aspen Aspen

Second Most Common -- Limber Pine

Trees per acre 600 1360

Species composition

Trees/ac Basal area

Aspen 1138 60 ft2

Blue Spruce -- --

Douglas Fir -- --

Engelmann Spruce -- --

Limber Pine 222 40 ft2

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) 1360 100 ft2

Site Data Slope Elevation

11 % 9092 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0.9 -- --0.25"-0.99" 1.2 -- --1"-2.99" 0 -- --3" + 0 0 0Plot Total 2.1Fuel DepthLitter 2.7 InchesDuff 0.9 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Quaking Aspen Fuels Class: Med

Number of Plots: 10 Number of Plot

 Tree Data  Saplings Mature trees

Most Common Species Douglas Aspen

Second Most Common Aspen Ponderosa

Trees per acre 1200 369

Species Composition

Trees/ac Basal area

Aspen 147 20 ft2

Blue Spruce -- --

Douglas Fir 75 20 ft2

Engelmann Spruce -- --

Limber Pine -- --

Lodgepole Pine -- --

Ponderosa Pine 147 20 ft2

Total (per acre) 369 60 ft2

Site Data Slope Elevation

3 % 7988 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0.1 -- --0.25"-0.99" 0.9 -- --1"-2.99" 10.2 -- --3" + 1.2 0 1.2Plot Total 12.4Fuel DepthLitter 1 InchesDuff 0.1 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Quaking Aspen Fuels Class: H

Number of Plots: 10 Number of Plot

 Tree Data  Saplings Mature trees

Most Common Species Engleman Aspen

Second Most Common Douglas Douglas

Trees per acre 2400 247

Species composition

Trees/ac Basal area

Aspen 120 40 ft2

Blue Spruce -- --

Douglas Fir 67 40 ft2

Engelmann Spruce 30 20 ft2

Limber Pine 30 20 ft2

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) 247 120 ft2

Site Data Slope Elevation

4 % 9165 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 1 -- --0.25"-0.99" 2.1 -- --1"-2.99" 5.8 -- --3" + 30.3 4 26.3Plot Total 39.2Fuel DepthLitter 1 InchesDuff 1.2 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Quaking Aspen Fuels Class: M

Number of Plots: 10 Number of Plot

 Tree Data  Saplings Mature trees

Most Common Species Aspen Aspen

Second Most Common -- Douglas Fir

Trees per acre 300 933

Plot basal area

trees/ac Basal area

Aspen 917 20 ft2

Blue Spruce -- --

Douglas Fir 16 20 ft2

Engelmann Spruce -- --

Limber Pine -- --

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) 933 40 ft2

Site Data Slope Elevation

22 % 9282 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0.5 -- --0.25"-0.99" 0.3 -- --1"-2.99" 1.5 -- --3" + 10.2 0 10.2Plot Total 12.5Fuel DepthLitter 1 InchesDuff 0.1 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Fuel Class

Quaking Aspen Fuel Classes

Low:2.1tons/acHigh:39.2tons/ac
Colorado Front Range Photo Se

Forest Type: Douglas Fir Fuels Class: 

Number of Plots: 66 Number of Plots

 Tree Data  Saplings Mature trees

Most Common Species -- Douglas Fir

Second Most Common -- Limber Pine

Trees per acre 0 251

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir 213 80 ft2

Engelmann Spruce -- --

Limber Pine 38 40 ft2

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) 251 120 ft2

Site Data Slope Elevation

44 % 8484 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0.4 -- --0.25"-0.99" 0.6 -- --1"-2.99" 0 -- --3" + 0 0 0Plot Total 1Fuel DepthLitter 1 InchesDuff 0 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Douglas Fir Fuels Class: Med

Number of Plots: 66 Number of Plots

 Tree Data  Saplings Mature trees

Most Common Species Aspen Douglas Fir

Second Most Common -- Aspen

Trees per acre 30,000 1125

Species Composition

Trees/ac Basal area

Aspen 917 20 ft2

Blue Spruce -- --

Douglas Fir 208 60 ft2

Engelmann Spruce -- --

Limber Pine -- --

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) 1125 80 ft2

Site Data Slope Elevation

26 % 9186 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 0.2 -- --0.25"-0.99" 0.3 -- --1"-2.99" 7.3 -- --3" + 11.9 4.9 7Plot Total 19.7Fuel DepthLitter 0 InchesDuff 0.1 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Douglas Fir Fuels Class: Hi

Number of Plots: 66 Number of Plots

 Tree Data  Saplings Mature trees

Most Common Species -- Douglas Fir

Second Most Common -- --

Trees per acre 0 40

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir 40 60 ft2

Engelmann Spruce -- --

Limber Pine -- --

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) 40 60 ft2

Site Data Slope Elevation

16 % 8603 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 1.3 -- --0.25"-0.99" 0.3 -- --1"-2.99" 2.9 -- --3" + 33.4 22.8 10.6Plot Total 37.9Fuel DepthLitter 1 InchesDuff 0 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Photo Se

Forest Type: Douglas Fir Fuels Class: Me

Number of Plots: 66 Number of Plots

 Tree Data  Saplings Mature trees

Most Common Species -- Douglas Fir

Second Most Common -- --

Trees per acre 0 N/A

Species Composition

Trees/ac Basal area

Aspen -- --

Blue Spruce -- --

Douglas Fir -- 100 ft2

Engelmann Spruce -- --

Limber Pine -- --

Lodgepole Pine -- --

Ponderosa Pine -- --

Total (per acre) N/A 100 ft2

Site Data Slope Elevation

0 % 7500 ft

Fuel DataDiameter Class Total tons/ac Sound Rotten0"-0.24" 4.2 -- --0.25"-0.99" 1.2 -- --1"-2.99" 1.5 -- --3" + 3.8 3.8 0Plot Total 10.7Fuel DepthLitter 6 InchesDuff 1.6 Inches

05

101520253035404550

Tons/ac

Total 1 

Fuel 
Colorado Front Range Fuel Class

Douglas Fir Fuel Classes

Low:1tons/acHigh:37.9tons/ac

(voice and TDD). USDA is an equal opportunity provider and em

The Rocky Mountain Research Station develops scientifi

information and technology to improve management, protectioand use of the forests and rangelands. Research is designed meet the needs of the National Forest managers, Federal anState agencies, public and private organizations, academinstitutions, industry, and individuals.

Studies accelerate solutions to problems involvin

ecosystems, range, forests, water, recreation, fire, resourcinventory, land reclamation, community sustainability, foreengineering technology, multiple use economics, wildlife and fishabitat, and forest insects and diseases. Studies are conductecooperatively, and applications may be found worldwide.Research LocationsFlagstaff, Arizona Reno, NevadaFort Collins, Colorado* Albuquerque, New MexicoBoise, Idaho Rapid City, South DakotaMoscow, Idaho Logan, UtahBozeman, Montana Ogden, UtahMissoula, Montana Provo, Utah*Station Headquarters, Natural Resources Research Cente2150 Centre Avenue, Building A, Fort Collins, CO 80526.

RMRS

ROCKY MOUNTAIN RESEARCH STATION

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in all its programs and activities on the basis of race, color, nationorigin, sex, religion, age, disability, political beliefs, sexual orientatioor marital or family status. (Not all prohibited bases apply to programs.) Persons with disabilities who require alternative means fcommunication of program information (Braille, large print, audiotapetc.) should contact USDA’s TARGET Center at (202) 720-2600 (voiand TDD).

To file a complaint of discrimination, write USDA, Director, Offi

of Civil Rights, Room 326 W, Whitten Building, 1400 IndependenAvenue, SW, Washington, D.C. 20250-9410 or call (202) 720-596(voice and TDD). USDA is an equal opportunity provider and employe