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Potentiometric Surface Map of the Fox Hills-Lower Hell Creek Aquifer

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Potentiometric Surface Map of the Fox Hills-Lower Hell Creek Aquifer 53E Montana Bureau of Mines and Geology 55E 56E Montana Ground-Water Assessment Atlas No. 1, Part B, Map 7 A Department of Montana Tech of The University of Montana October 1998 M i s Revision 1 - Dec. 17, 1998 52E 54E s o 105 1989 o 1993 1959 u Poplar 2000 r H i a Dome r 51E d s c 57E r Ch a ar b 2057 l b R i i 27N e l v e RICHLAND C e re r e k 58E 59E 2025 C Ground-Water Characterization Study Areas r 2049 e 2019 e k o o 48 48 2015 NORTH DAKOTA 26N 2100 2066 2142 M 26N ONTANA DAWSON 2083 PRAIRIE 2124 25N WIBAUX 25N a E st Red wa te r C reek FALLON F ir st H a 24N 24N y C re 2046 ek 2056 SOUTH 50E Lower Yellowstone River Study Area DAKOTA 23N 23N 1948 2064 2047 2062 Sidney 2000 2056 k e e N r or C th F 2020 22N 22N r or te F k a o w x C F ed re ox Creek R 2107 e k 2051 Explanation No Water-level altitude in well completed in the Fox Hillslower Hell Creek aquifer rt 2058 h F 2100 ork Bur 2074 Water-level altitude in flowing well completed in the Fox Hillslower Hell Creek ns C r e 21N aquifer 21N e k 2200 Potentiometric surface contour for the Fox Hillslower Hell Creek aquifer (dashed where inferred) 2113 B Area of flowing artesian conditions urn N s Cr e T ek h ir te County boundary en m 2101 20N 20N il e Township boundary 2143 2153 2135 County seat C re e k Major road Scale 1:250,000 Principal stream 0 5 10 15 miles 2128 19N 19N Sm ith Outcrop and subcrop of the Pierre Shale 2140 Cr Transverse Mercator Projection 2137 eek Central Meridian -105 Degrees Outcrop of the Fox Hills Formation 1927 Horizontal Datum 2112 Contour interval = 100 feet Altitude datum is mean sea level 2148 18N 18N 2200 U p 2091 p er S ev C en ottonw mil oo e Cree d k Creek 2121 2099 2208 2125 17N 17N 2095 2212 106o 2300 2088 45E 47E 48E 49E 50E 2100 2200 16N Cl 16N ea r 46E Glendive C reek 2118 K reek 2400 rug C G l e n 15N d 15N i ve Creek o B 47 ra 47o c k 2300 C e e t d t ar Wibaux C 2314 r 2339 14N C e 14N r e ee k k 2358 2339 2248 2139 2372 2400 C ed 2457 ar 2427 2304 C re ek 2496 2503 herr 2471 C y C reek 2500 2470 13N 13N 2300 2534 2281 2300 2408 45E 2212 2280 46E 2322 o 106 2306 2188 2400 2310 47E 48E 2289 2287 2291 2556 C 2572 v ab Ri e r in 2333 C 2273 re 2273 ek 12N 2251 Terry 2358 12N 2615 2595 2302 2448 2600 2283 2334 2429 2614 e 2300 2437 2521 2398 2371 n O 2398 2632 2635 2592 2354 Fa Cedar o llo 2442 n C t re 2601 s2247 ek w 2282 o 11N l 2329 11N l 2722 2288 P 2558 2700 e o 2500 w d 2495 2713 Y 2321 e 2428 r 2548 2335 R 2436 2500 2344 i 2550 v 2400 e 49E r 2701 2363 2379 2613 2789 2422 10N 10N 2806 2747 55E 2795 B 2349 2434 2 e 2362 2884 800 av 10N er 2740 2845 C re 2600 ek 50E 2841 51E 2418 54E Potentiometric Surface Map of the Fox HillsLower Hell Creek Aquifer, 2642 Lower Yellowstone River Area: Dawson, Fallon, 52E 53E 9N 105o 9N Prairie, Richland, and Wibaux Counties, Montana P enn el C 2924 re 2602 2619 2700 ek 55E 3000 by 2742 2625 2695 2770 3009 2838 S 2900 a n 2977 d John I. LaFave 2613 st 2728 2830 2622 on e Creek 8N C 8N r e e 2987 2680 k 3032 2985 Introduction 1965) the rate of ground-water flow is estimated to be on the Long-term declines occur when more water is removed Acknowledgements 2837 2637 2934 order of 2 to 10 feet/year in the study area. To put this flow from the aquifer than is recharged. At some point these 2672 2729 2779 2990 estimate into perspective, if the ground water is moving at a declines can create undesirable effects such as increased lift 2694 2783 The Fox Hillslower Hell Creek (FHHC) aquifer consists rate of 5 feet/year it would take about 1,000 years for water Well owners who allowed collection of the data necessary Pi Baker 3027 3 costs, decreased yields, and flowing wells ceasing to flow. ne 000 of near-continuous sandstone deposits found in the lower part to travel one mile. for this map, and the people who collected the data are all Cr 2754 2994 7N eek 2800 of the Hell Creek Formation and most of the Fox Hills Water recharges the FHHC where it is exposed at or near gratefully acknowledged. Reviews of this report by Tom 2729 2773 7N Sandstone. the land surface. As shown on the map below the main Patton, Larry Smith, Wayne Van Voast, and Kate Miller a 2891 recharge areas are outside of the study area. improved its clarity. Geologic a a aThis report a Hydrologic 2955 3014 units: units: Map Use Anticline a aa a a a a a a a a a a Terrace a a Shallow hydrologic C A N A D A 2940 a a a Alluviuma unit 2891 aaa a a a a aaa Fort Union a a aa a a Formation aaa Montana North Dakota This potentiometric surface map is useful for estimating aaa a a a a a Deep hydrologic a a a a the general direction of ground-water flow in the aquifer, Data Sources 2995 aaa a a a 2900 a aa a a a a a unit aaa a a identifying areas where flowing artesian wells may occur, aaa a a a a a Confining bed a a a a a aa aaa a a a a Hell Creek a a Glasgow and estimating the water-level altitude in a non-flowing well. Formation aGeographic features: 6N Fox Hills aaa a a Fox Hills and 6N a a a a aa a a a a a aaa a a a a a lower The inset diagram to the right shows how to determine direction Fox Hills Hell Creek Population center locations and roads are from 1:100,000- Formation aquifer Hell Creek of ground-water flow from the map. Areas of flowing artesian scale U.S. Geological Survey (USGS) Digital Line Graph aa a a a a a a 2798 aaa a a outcrop StudyStudy conditions, where the water levels in wells completed in the files available from the Natural Resources Information System a a a a a a a aa a a Area Aquifers are saturated geologic materials that yield area FHHC will rise above the land surface, are shown in yellow (NRIS) at the Montana State Library, Helena, Montana. O F a a a aa a a aa a sufficient water to supply wells and springs. Non-aquifer a a a a a a a on the map. In areas where the water levels are below the Hydrography has been simplified from the 1:100,000 Digital l 2875 l o 2915 3057 materials (confining beds) also may be saturated but have land surface, the map can be used to estimate the level to Line Graph files. Township boundaries are from 1:250,000- n 3000 a a a a a C a a a a aa a low permeability and do not produce usable amounts of water which water will rise in a well. If the approximate land-surface scale U.S. Geological Survey mapping and are available from 2840 r e e a a a a a k a a a aa to wells or springs. The sandstones that compose the FHHC a a Miles City altitude at a location is known, the corresponding point on NRIS. aquifer are from 125 to 400 feet thick and are sandwiched 5N a aa aa a a the potentiometric surface map can be found and the altitude aa a a a a a 5N between the Pierre Shale, which marks the basal confining aaof the potentiometric surface estimated. Subtraction of the Point data: 2843 2863 2933 a a a a a a a a a aa a a layer, and overlying mudstone of the upper Hell Creek a Well location and water-level altitude data were obtained 2840 3016 potentiometric surface altitude from the land surface altitude 3147 Formation. The aquifer occurs at depths from 600 to 1,600 Billings by Ground-Water Characterization Program personnel, altitude 2903 a aaa a a aa aa a a a a a a a yields the approximate depth below land surface at which feet below land surface throughout most of the study area, 3100 water will stand in the well. of the points was determined from U.S. Geological Survey 2890 aa a a a a a a a 2893 aaa a a a except along the Cedar Creek anticline and the Poplar Dome a a a 7.5-min. quadrangles. All point data used on this map are (Smith 1997). Typically the water level in wells completed a55E 56E 57E aaa aaa a a available from the Ground-Water Information Center (GWIC) in the aquifer will rise above the top of the aquifer due to the Wyoming at the Montana Bureau of Mines and Geology, Montana Tech 2997 artesian pressure, and in low areassuch as the Yellowstone of The University of Montana, Butte.
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