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103o 00 '47o 30 '

102o 00 '47o 30 '

103o 00 '47o 00 '

102o 00 '47o 00 '

100K Series: Kldr - c Lignite ReservesR. 96 W.

T. 14

6 N.

T. 14

4 N.

T. 14

2 N.

T. 14

1 N.

T. 14

3 N.

R. 94 W. R. 93 W. R. 92 W. R. 91 W. R. 89 W.R. 90 W.

R. 96 W. R. 94 W.R. 95 W. R. 93 W. R. 92 W. R. 91 W. R. 90 W.

T. 14

5 N.

Cartographic Compilation : Elro y L. KadrmasR. 97 W.

R. 95 W.Killdeer 10 0K Sheet, No rth Dakota

R. 97 W.Adjoining 100K Maps

Killdeer 100K Sheet, North DakotaNorth Dakota Geological Survey

Edward C. Murphy, Acting State Geologist

1974 Magnetic No rthDeclinatio n at Cen ter of Sheet

13o

The Dunn Center coal deposit underlies approximately 28,000 acres in central Dunn County. In addition to the Dunn Center quad, the deposit extends into Dunn Center NW, Dunn Center NE, Lake Ilo, and Werner. The Dunn Center bed is 10 to 21 feet thick in this area. A five to ten foot thick coal is generally present 20 to 50 feet above the Dunn Center bed. The Dunn Center deposit contains approximately 900 million tons of mineable coal. Glacial melt water flowed through this area tens of thousands of years ago removing these coals and creating depressions now occupied by Spring and Slow creeks as well as Boe and Moffet sloughs. In 1975, the Natural Gas Pipeline Company of America (NGPCA) drilled over 1,800 test holes in and around the Dunn Center deposit to determine the feasibility of establishing a gasification plant in the area. NGPCA abandoned the project when gas prices failed to rise to projected levels in the early 1980’s. The Nokota Company took over the project and reportedly still holds some coal leases in the area.

UNIT DESCRIPTIONS

Geology UndifferentiatedGU

Economic Coal DepositsL

Economic coal deposits are those that meet the minimum criteriaestablished by coal companies operating surface mines in NorthDakota. These economic criteria include a minimum cumulativecoal thickness of ten feet-typicallyoccuring in less than two beds,a minimum individual bed thickness of at least 2.5 feet, a ratio ofoverburden to coalthickness of not more than 10:1, a minimum of25 feet of overburden, and a maximum depth to coal ofapproximately 150 feet.

Geologic Symbols

!

Extent of Local Lignite Reserves

Data PointsIncludes coal exploration NDGS/USGS drill holes, sub-surface mineral drill holes, oil & gas wells, and NDSWC drill holes.

The North Dakota Geological Survey has published a series of 1:24,00 0 scale quadrangle maps (24k - c series) of the mineable coal deposits in the Killdeer 100k sheet. These maps include information on mineable coal thicknesses. This project was supported, in part, by the U.S. Geological Survey, Department of Interior, under assistance awards 02ERAG0016 and 05ERAG0053.

Scale 1:100,000

Mercator Projection 1927 North American Datum

USGS NED Shaded Relief - Vertical Exaggeration 9x

0 1 2 3 4

Miles

Standard parallel 47o 00' Central meridian 102o 30'

Edward C. Murphy2004

Other FeaturesWater

County Boundary

Section CornersE

Unpaved Road

River/Stream - Intermittent

Paved Road

River/Stream - Perennial

State Highway!(22

Water - Intermittent

Reservation Boundary