R. 1. 4360

l

p

II

OCTOBER 1948

UNITED STATES

DEPARTMENT OF THE INTERIOR

J. A. KRUG, SECRETARY

BUREAU OF MINES

JAMES BOYD, DIRECTOR

1

i

REPORT OF INVESTIGATIONS

INVESTIGATION OF THE W. E. DUNKLE COAL MINE

COSTELLO CREEK, CHULITNA DISTRICT, ALASKA

BY

F. A. RUTLEDGE
R. I. 4360,

October 198.

REPORT OF I7JESTIGATIONS

UNITED STATES DEPAERTMENT OF TEE _MTERICR - BtREAU OF MINES

INVESTIGCTION OF THE W. E. DUNIKE COAL MINE COSITLLO CREEK,

CHULITNA DISTRICT, ALASKA1/

. . By F. A. Rutledge2 /

COITENTS

Page

, , Introduction and smnrmary ... ........... 1

-, -Acknowledgments....... ................. 2

Location and accessibility ................ 2

Physical features and climate............. 2

History and roduction... .... ....... 3

General geologyr........................... 4

Description of deposits... ............... 4

Calculated coal reserves................. 6

Mine workings ....................... 7

Products .................. ... 7

TMT9iRODUCTION AND SLIMMRY

The W. E. Dulkle mine, sometimes called the Costello Creek. coal mine, is

8 miles N. 20° W. of Colorado Station on the Alaska Railroad. The -presence

of coal in this area has been known since the district was extensively prospected for gold between 1911 and 191,5. At that time, coal from this deposit

was used by miners for bla.cksmithing. The increased demand for coa3. resul1ting

from government defense projects in Alaska led to exploitation of this deposit

in 1941.

The inability of Alaska coal mines to supply the quantity of coal required

by public and private consumers and by the armed forces in Alaska was responsible for establishment by the Army of the Coal Procurement Section of its

Alaska Department. It proposed to investigate the deposits and to expedite

production from the Alaskan coal fields. The Bureau of Mines closely cooperated

in this program.

The quality of the Dunkle coal and the favorable location of the deposit

caused it to be one of the properties chosen for investigation under a joint

Army-Bureau of Mines-Geological Survey program.

1/ The Bureau of Mines will welcome reprinting of this paper, provided the

following footnote acknowledgement is used: "Reprinted from Bureau of

Mines Report of Investigations 4-6o."

2/ Mining engineer, Juneau, Alaska.

2540
During July 1943, the coal area in the immediate vicinity of Costello

Creek was geologically and topographically mapped by Clyde Wahrhaftig and

Jacob Freedman, geologists, U. S. Geological Sutrvey. F. A. Rutledge, mining

engineer of the Bureau of Mines examined the property July 18 to 22, 1943,

and a project of trenching, diamond drilling, and sampling was initiated on

August 4-, 194-3. During the project Clyde Wahrhaftig remained at the Dunkle

mine to interprete drill cores and assist the author in planning the exploratory program. The project was completed October 7, 1943.

ACI2OIMLEDGMENTfS

Field investigations were under the general direction of R. S. Sanford,

acting chief, Alaska Branch, Mining Division. Coal analyses were made by

Maurice L. Sharp, coal analyst for the Alaska Railroad.

Special mention 'is' mbabe of the' cooperation and assistance received from

Clyde Wahrhaftig, geeoboist', U. S. Geological Survewy

The many courtbsies rbec'ived from the owner, W. E. Dunkle, and the members of the Army Coal. fri-curcement Section, Alaska Department, also are acknowledged.

LOCATION AN) A) CCESSIBILITY

The W. E. Dunkle' coal 'mine is 'in 'the Broad Pass region on the south slope

of the Alaska Range at an altitude of 2,800 feet (fig. 1). It is situated

within the Third Judicial Division, headquarters of which is Valdez, Alaska.

The area is situated approximately at latitude 63° 15' H. and longitude 149°

30' W. and is connected with the Alaska Railroad at Colorado Station by an

11-mile gravel road that is passable .throughout the year. This road is maintained by the Alaska Road Commission. A private telephone line to Colorado

Station connects with the telephone and telegraph scrvice of the Alaskan

Railroad.

The passenger rate from Anchorage, Alaska, to Colorado Station is $12.10.

Freight rates are $1.60 a hundred pounds for heavy machinery and $2.66 a hundred pounds for first-class freight.

PHYSICAL FEATURES AND CLIMATE

The Costello Creek coal basin is in an area of low relief and. has been

dissected by numerous creeks flowing down the south flank of the Alaska Range.

The Dunkle coal mine is on Coal Creek, a small tributary of Camp Creek, 1,000

feet from their junction. About 7Q0 feet below this junction, Camp Crock

joins Costello Creek, which in turn empties into Bull River 1/2 mile above the

latter's confluence with the West Fork of the Chulitna River. The location of

. the mine is shown on figure .1.

Vegetation in the immediate vicinity of the coal deposit is entirely the

low brush, grass, and moss commonly found above timber line in this part of

Alaska. In the valleys, below 2,500 feet, spruce and cottonwood large enough

for mine timbers may be obtained.

R.I. 4360

2540 - 2 -
Figure 1. - Location map, W. E. Dunkle coal mine.
Precipitation in this district is approximately 35 inches a year, with

snow common from September to June. During the summer months rain and fog

occur frequently. Temperature extremes are reported to have ranged from a

high of 900 F. to a low of. -50 F. The climate is not considered objectionable by interior Alaska standards.

The water supply for the present camp is taken from Coal Creek about 300

feet above the camp. With proper precaution, this stream will serve as an

excellent source of all water needed for a small camp.

HISTORY AND PRODUCTION

The earliest mining interest in this district was evinced by placer-gold

prospectors in 1907. Although the prospectors were searching for the more

readily extractable placer gold, certain lode deposits were.recognized. The

isolation of the district, however, precluded development of.these prospects.

Later, from 1911 to 1915, the district was prospected extensively, and it was

at this time that the coal beds on Coal Creek were worked by Frank and Lon

Wells. Blacksmith coal was obtained from the outcrops for use at their prospect on Costello Creek as well as for other operations on the West Fork of

the Chulitna River.

The aroa was first examined by the Federal Geological Survey in 1917,

when Capps3/ reported three coal beds, 6, 5, and 9 feet thick, in descending

order at the present site of the Dunkle mine. During the summer of 1930,

Cappsl/ made a more extensive survey as a part of his investigation of the

West Forkr of the Chulitna-Bull River region.

The problem of obtaining and maintaining an adequate supply of coa.l for

the Alaska Railroad has been, prior to the present emergency, of prime concern. In 1930, a special committee of the United States Senate visited Alaska

to study some of the railroad's problems, and they later successfully urged

Congress to grant $250,000 for the investigation of mineral deposits along

the Alaska Railroad.. The Federal Geological Survey recommended certain areas

for investigation under this act, and in 1931 Clyde P. Ross5/ made a detailed

study of the deposits in the vicinity of the West Fork of the Chulitna River,

including the coal area on Coal Creek.

The first coal-prospecting permit covering this area was issued to Henry

Stevens and Frank Wells on July 13, 1929. It resulted in a amdll production

to meet local needs.

Coal Prospecting Permit No. 09196 was reissued to Henry Stevens April

20, 1939, who transferred it to W. E. Dunkle on September 24, 1941. During

3/ Capps, S. R., Mineral Resources of the upper Chulitna Region, Alaska:,

U. S. Geol. Surv. Bull. 692, 1919, pp. 231-232.

4/ Capps, S. R., The Eastern Portion of MoUht McKinley National Park: U. S.

Geol. Surv. Bull. 836-D, 1930.

Ross, R/ Clyde P., Mineral Deposits Near the West Fork of the Chulitna River,

Alaska: U. S. Geol. Surv.'Bull. 849-E, 1931.

R. I 4360

2546 - 3 -
1941 and 1942 approximately 5,000 tons of coal was mined from Entry No. 2

(Dunkle Entry, Dunkle bed) and shipped to markets along the Alaska Railroad.

The mine suspended operations March 31, 1943. The Coal Prospecting Permit

under which this operation was conducted has expired.

The description of the area covered by Coal Prospecting Permit No. 09196

is as follows:

Unsurveyed land situated on E. side of Costello Creek, about

50 feet from said creek, on the W. side of Bull River and about

1-1/2 miles from said river.. The E. end line of said land is

about 5 miles Mn. of Broad Pass Station on the Alaska R.R.; the

land is situated in the Talkeetna recording precinct, Terr. of

Alaska. Said lands are described by metes and bounds as follows:

Commencing at W. .cnter end post, from which the discovery post

bears due E. 1,00 feet distant, extending thenco due S. 3,960

feet to SW..Cor. post; thence due E. 14,080 feet to SE. cor. post;

thence'due N. 7,920 feet to E, Cor. post; thence due W. 14,080

feet to NW. Cor. post; thence due S. 3,960 feet to W. center end

post, the place of beginning, containing 2,560 acres. (SM)

Under the Leasing act, a royalty of 10 cents a ton is paid the government

for all,coal produced under pormt.

Coal Prospect Permit No. 09196 is now identified as Serial 010280 issued

to Duhkle as sole owner, and an appliceation for renewal of this permit is now

pending (February 1948). The records of the Bureau of Land Management reflect

that favorable action will be had.

GENERAL GEOLOGY/

The coal occurs as lenses and discontinuous beds in a series of partly

consolidated Tertiary conglomerates, sandstones, siltstolns, and shales. The

series is uuiconformably muderlain by profoundly eroded, steeply dipping, preTertiary rocks and is unconformably covered by Pleistocene glacial gravels.

The coal-bearing formation is typical of those deposited by low-gradient,

sluggish streams in low, basinlike areas and was deposited prior to the rising

of the Alaska Range.

Because the beds lie on the margins of the region affected by the uplifting

and folding processes, they are but slightly compressed and have gentle dips.

DESCRIPTION OF DEPOSITS

The position and size of the coal beds would indicate that at the beginning of the period of deposition of the Tertiary coal-bearing.formation this

region was gently rolling to moderately hilly. The pre-Tertiary rocks were

thoroughly weathered to a depth in places exceeding 25 feet below the surface.

6/ After Capps, S. B., pp. 272-276 of :ootnotne 4.

R.I. 4360

2540 - 4 -
All//uvium .

L UNCONOROMITY Y

la/ocia ou/wosh deposits

and Tr/i

0 UNCOFORAM/ITY

CoV/-briong sed/ienfs

(porf/y canso/idotai /nferbeddd sandston

cong/oner, si/tstonre and c/aysonq conta/ning discontinuous col/ bds)

LUNCONFORMITY

Undifferentiotd i/gnous and sedmnentary

rck4 Perm/bn o Crseaceous

# Legendc-

-F ult oapproximo t

F...-'Faoult covered

..-- Foault inferred

- 'Fault inf ared and corid

/; Strike and d/o of sedimenfs

v S-trike of vorhicel sia/ments

* a'/t lying sJdiments

Axi/ of sync/ne, showing

direction of pitch

- --- Area sho1 on F Ig. 3 Jt

0 I g

Note: 5urveyed in /943. Oeo/ogy and

fopography by C/yde Wahrhofft/, Dept

of fhe Interior, Oeo/logcol Survey

-- I Scale in Mi/es

Contour interval /00feet

Datum approximatf Sea Level

Figure 2. - Geologic and topographic sketch map of

Costello Creek coal basin, Alaska.
Figure 3. - W. E. Dunkle coal mine.
Legend

Coo/ in P/ace

fouc base ofpers/stenf

pa /n in Dunkle Bed

lF/rsf number i5 E/ev. a? base

oFport/in. second /i£ E/ev

of f/oor of workings 0 50 /00

Sc/le in Feet

Oeology and Elevafions by Oeoog/co/ Survey

Figure I. - Underground workings, W. E. Dunkle coal mine.
I M

Figure 5. - Structure contour map.

iL '
At the base of the Tertiary formation is an unsorted conglomerate consisting of angular fragments in a matrix of brown silt and clay. This conglomerate is occasionally found higher in the section interbedded with coalbearing material and suggests that the angular fragments were derived from

hills that existed close tby at the time of deposition. This would explain

the occurrence of the coal as discontinuous lenses, interbedded with brown

carbonaceous shales, yellow sand, and concretionary beds and formed in a

gently rolling area of low relief, as suggested by Capps. The brown silts

interbedded with the coal are frequently very carbonaceous, and all rock types,

from coal to siltstone with scattered carbonaceous particles, were represented

in the core.

Lying above the main coal-bearing formation, and grading into it through

a thin series of blue and black clays, is a coarse bluish-gray to greenishgray sandstone containing numerous moderately well-rounded pebbles of quartz

and black argillite. CarbonaCeous material and a few thin coal beds are found

in this member.

Glacial outwash comprised of coarse gray grave]. with irterbedded sand

and clay beds rests unconformably upon the Tertiary coal-bearing formation.

Figure 2 is a geologic and topographic sketch map of the Costello Creek coal

basin as prepared by the Geological Survey.

Trenching and diamond drilling at the Dunkle mine revealed three coal

beds of minable thickness. These beds are known as the Dunkle, the "Upper",

and the "Lower", the latter 2 being subdivisions of an upper member known as

the Billie bed. Location of drill holes and trenches is shown on figure 3.

The coal sampled in diamond drill hole No. 14 may be either the Dunkle or the

Billie bed, but as the upper members of the series should naturally be more

continuous, it is assumed to be the. Billie.bed in calculating coal reserves.

The different beds are also assumed to.be continuous between holes, and the

arithmetical average of the thicknesses is used in calculating reserves.

Four types of structure have resulted from the deformation affecting the

coal beds. One of the most important of these is a monoclinal fold that

trends approximately N. 280 E. and which passes through the area drilled by

holes 12, 13, 14 and 15. This structure lowers the-west side of the coal beds

with respect to the east. The maximum dip observed in the drill cores was

15 to 20 degrees, but it may be steeper in places not.drilled.

Along the base of this monocline occurs a gentle synclinal structure in

the area of entries 1 and 2. This is joined near diamond drill hole 14 by a

very gentle syncline trending east and west, the axis of which passes through

the workings of the No. 1 entry.

The coal-bearing formation is bounded on the southwest by a fault with a

vertical displacement of several hundred feet. Other faults with displacements

of equal magnitude bound the coal basin on the north and northeast.

Within the 'present workings are many minor reverse faults with verticaldisplacements of 6 inches to 10 feet. These faults strike from N. 200 W. to

N. 70° W. and dip 20 to 60 degrees. A plan. of the present mine workings is

shown on figure 4 and a structure contour map of the coal measures on figure 5.

R.I. 4360

2540 - 5 -
Another feature of structural and stratigraphic control that determines.

the boundary of the coal is the unconformable overlap of the glacial gravel..

On the northwest side of the coal area, the coal. beds have been eroded and

are cut off at the sloping base of the glacial gravel. This is plainly apparent in the open cut northwest of entry 2. The coal formation dipping gently

to the west has, on the east side of the area, again been eroded and is cut

off at the irregular base of the Quaternary glacial gravels.

The formations cut by the diamond-drill holes are shown graphically on

figures 6 and 7.

CALCUiATED COAL RESERVES

Estimation of coal reserves at the W. E. Dunkle mine is difficult. The

deposits are small and extremely irregular.- Correlation of beds between; drill

holes is complicated, as indicated when sections through entries 1 and 2,

only 120 feet apart, are compared. In hole 14 the only coal bed exposed may

be either the Dunkle or the Billie bed, but as the upper members of a coal

series are usually more continuous than the lower, it is assumed in the calculations to be the Billie bed. The tonnages for the Billie bed have.been

separated into an upper and a lower bed, but it is expected they will be mined

as one unit. The Dunkle bed exposed in hole 16 has not been included in the

reserves, as its detached position precludes mining of this section through

the proposed workings. .

The areas covered by the coal beds included in the reserves are indicated

'on figure 8, and the tentative tonnages are given in -table 1.

TABLE 1. - Calculation of coal reserves

Area,

square Thickness, Vol.ume, Short Minable

Bed Class fet fee t cubic feet tonsl/ tonnage/

Dunkle Measured....... 138,000 T 1 -834,800 3/33,670 ',40b

Indicated....., 93,625 6.1 571,100 22,840 11,400

Inferred....... 56,525 6.1 344,800 13,790 6 900

2 6,700

Lower Billie Indicated ....... 776,000 3.7 2,871,200 114,850 57,-00

Inferred....... 471,000 3.7 1,742,700 69,710 34,9300

92,300

Upper Billie Indicated ...... 549,000 4.3 -2,360,700 94,430 472

Inferred....... 308,000 4.3 1,324,400 52,980 26,500

73,700

Total: .192,700

Measured...... 8. 400

Indicated.... 116,000

Inferred..... 68,300

._____________ ___ _____192,700 1/ 25 cubic feet of coal equals 1 short ton.

2/A mining extraction factor of 50 percent has been assumed.

3/ 50 percent of this amount has either been extracted or left as of pillars.

R.I. 4360

2540 - 6. -
--

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Brown fo bue co-hbnrns s s/wtl

Cooal (5anpr a S)

/nserboe d she an/d i/sVr with coo/ lia d fmrrnS

51ft a saold with cw/ froments

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Lark aim carbormcrow muds ot

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Glociol grvel

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BrAwnsh -pray S/f

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C^obrceovs sh - cos 7 taW Bo7y coo/ Hord bron si/tlitov

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Figure 6. - Drill hole logs.
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l.ol /1,972,V

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sh/le, cool fragment

Carboa.cemo shole -thin col/ lanioa

Col (Sowkle NAo 7)

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and fhtn coa/ seams

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baoe, and /fltson. So0n tfn col

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Figure 7. - Drill hole logs.
Figure 8. - Coal reserves, W. E. Dunkle mine.
R.I. 4360

MITE WORKINTGS

The principal workings of the Dunkle mine consist of two separate sections

shown on figure 4. The original entry was driven:by Stevens and is called

Entry Ho. 1 or the Stevens Entry. It is composed of a main entry, several

lateral entries, and one room. This section is abandoned at present. Most

of the production has been from the second section, through Entry No. 2, the

Dunkle Entry, which was driven in 1941. This second section consists of the

main entry, counter entry, numerous rooms, and break-throughs. No definite

mining system was followed, although the method used is similar to the roomand-pillar system.

PRODUCTS

Anal.yses of samples taken in the present workings by Garrett_/ and

Sanfordl/ indicate:that the coal is subbituminous and of a good grade. By

request of the Army, a steam test of the coal was made by the Bechtel-McConeParsons Corp. of Los Angeles, Calif., which indicated the coal to be suitable

for domestic and co:amercial consumption.:/ Results of these tests are as

follows:

1. The coal can be burned with virtually smokeless combustion.

2. The coal produces a hot fire and is efficient for boiler operation.

3. The amount of ash and soot is low.

4. The ash and clinkers produced break up readily in normal grate dumping.

5. The clinker is very porous and does not appreciably retard draft.

Analyses of samples taken in the underground workings are given in table

2. These include four samples taken by Garrett that had not been included in

his report as the analyses had -not yet been received.

This coal is classified as a subbituminous A, having a noncoherent residue

(NAa).2/

7/;Garrett, C. R., Preliminary Report on Costello Creek Coal Mine: Territorial Department of Mines, Territory of Alaska, 1943.

8/ Sanford, R. S., acting chief, Alaska Branch, Mining Division, Bureau of

Mines.

9/ Gilmore, R. E., Connel, G. P., and Nicolls, J. H. H.> Agglomerating and

Agglutinating Tests for Classifying Weakly Caking Coals: Trans., Am.

Inst. Min. and Met. Eng., Coal Division, vol. .08, 1934, pp. 255-265.

2540 - 7 -
R. I. 4360

TABLE 2. - Analyses of mine samples

i Calo- AshProxiate, perc ent Urtltima te, percent. rif ic softening AgglomMois- Volatile Fixed Sul-j Hydro- Car-- Nitro- Oxy- value, i ternp., erating

Sample -ture matter carbon Ash fur gen bon ge g gen jge B.T.U. i °F. index

Dunkle bed. As-received 18.)- 32.0 40r 9.2 0.6 -61 5.1 0.8 28.2 9,700 2530 NAa

450 feet from Moisture-free 39.2 49.5 L1.3 0.8 .5.0 6 7.5 1 4. 4 11 880

portal, Entry No. Moisture and 44.2 55.8 0.8 .7 76.0 1.1 16.4 13,380

2, at face in ash free

haulage way ____

Dmunkle bed .As-received 18.8 33.6 41.4 6.2 0.5 3 7.1 0.9 29. 1 40 2090 NAa

140 feet from ' Moisture-free 41.4 51.0 7.6 0.6 5.2 170.31 1.1 15.2 12,360

portal, Entry No. Moisture and 44.8 55.2 0.6 5.6 76. 1 1.1 I6.6 13,380

1, 30 feet to face ash free '

in Room No. 2, .

north from haulage .

way

Dunlae bed As-received 15.9 35.9 42.2 6.0 0.5 6 59.7 0.9 26.7 10,600 124 NAa

40 feet from por- Moisture-free 42.7 50.1 7.2 0.6 5.3 71.0 1 14.8 12,610

tal, Entry No. 2, Moisture and 46.0 54.0 0.6 5.7 176.5 1.2 l16. 13,580

120 feet to face ash free I

in Room No. 1, from

haulage way- , ____ _ .__ ___ , 

Billie bed As-received 18.2 . 34.3 39.9 7.56.3 0.9 27.9 ,970 2520 ms.

40 feet from por- Moisture-f-ree 41. 48.8 9.3 o0.6 5.3 69.4 1.1 14.3 12,200

tal, Entry No. 1, Moisture and 46.2 53.8 0.6 5.8 76. 5 1.2 115.9 13,450

in raise 5 feet ash, free I I I

above hanging wall ;

of Stevens (Dunkle) .

Bed I

Dtunkle bed As-received 15.4 37.9 38,0 8.7 9,520 NAa

234 feet from por- Moisture-free 44.8 44.9 10.3 11,605

tal, Entry No. 2, Moisture and 49.9. 50.1 12,94

12 feet from face ash free I I______ ______0 24 

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.I. q
Analyses of the samples taken by the Bureau of Mines during exploratory

work are given in table 3. The location of the samples in the drill holes canbe seen on figures 6 and 7.

TABLE 3. - Analyses of trench and drill hole samples

..-. -- Proximate, percent ' CalorificQ

Con- 1Mois- Volatile Fixed value,

Sample Location Bed ditionl/ ture matter carbon Ash Sulfur B.T.U.

2.... Trench 2 Billie C 12.2 3o.6 31.4 19.8 0.4 8,655

(?) 2 41.6 35.8 22.6 0.5 9,860

. 3 53.8 46.2 10.7 12,730

3 .... Trench 1 Billie 1 15.1 43.4 23.2 18.3 0.4 7,985

(?) 2 51.1 27.3 21.6 0.5 9,405

- 3 _ 65.2 34.8 - 0.8 11,995

4.... D.D.H. 11 Lower 1 12.8 33.1 33.1 21.0 0.5 8,510

Billie 2 38.0 38.0 24.0 0.6 9,760

- . 3 50.0 50.0 .0.8 12,860

5.... D.D.H. 12 Upper 1 10.4 37.1 40. 12.4 -0. 10,050

Billie 2 41.4 44.8 13.8 0.7 11,215

__3 48.1 51.9 0.8 13,015

6.... D.D.H. 13 Lower 1 8. - 37.7 41.4 12.2 0.5 10,115

Billie 2 41.3 45.3 13.4 0.5 11,075

1 3 47.7 52.3 _ 0.6 12,785

7.... D. . 14illie 8.9 38. 38.2 i4.0 0:4 9,940

(?) 2 42.7 41.9 15.4 0.4 10,915

I 3 50.5 49g.5 . 0.5 12,890

8.,.. D.D.H. 15 Upper 1 10.8 36.4 35.8 17.0 0.3 9,240

Billie 2 40.8 40.1. 19.1 1 0.3 10,360

3 -350.4 i49.6 o 0.4 12,795

9 .... D.D.H. 15 Lower 1 10.1 35.5 33.2 21.2 0.4 8,875

Billie 2 39.5 36.9 23.61 o.4 9,870

_3 52.4 47.6 - 0.6 12,735

10.... D.D.H. 15 Dunkle 1 6.3 27,2 19.0 417.5 - - (9) 2 29.0 20.3 50.7 -

________ 3 I 58.9 41.1 - -

11.... D.D.H. 16 Upper 1 13.0 36.6 37.2 13.2 O0T4 9,635

Billie 2 42.1 42.7 15.2 0.5 11,070

_______3 46.9 5C.4 0.5 13,055

12.... D.D.n. 16 Lower 1 l1.0 386 37.1 13.3 0.4 9,820

Billie 2 43.4 41.7 14.9 0.5 11,035

3 51.0 49.0 0.5 12,970

13.... D.D.H. 16 Dunkle2/ 1 11.2 t42.5 35^6 1J07 0.5 10,T185

2 47.9 40.1 12.0 0.6 11,470

3 54.4 45.6 0.6 13,035

14 .... D.D.H. 16 Dunkle2/ 1 11.7 40.9 37.0 0O,4 0.5 10,200

2 46.2 42.0 11.8 0.6 11,565 ____-_3 _ 52.5 47.5 _.6 13,095

15.... D.D.H. 16 Below 1 11.0 37.1 38.1 13.8 0.5 9,670

Dunkle 2 41.7 42.8 15,5 0.6 10,870

... 17 - 3 49.3 50.7 - 0.7 12 860

6.. D.D. 17 Lower 1 11.7 38.7 37.6 12.0 0.5 9,920

Billie 2 I 43.8 42.6 13.6 0.6 11,240

3 50.7 49.3 I 0.7 13,005

1/ 1, Sample as receiVedrefr; moisture- 3,' and ash-free.

2/ These two samples separated by 1.5 feet of parting.

, I. 4360

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