Principal Aquifers Identified by the Groundwater Resources Program for Assessment of Groundwater Availability

GROUP I — Principal aquifers underway or completed

Carolina Coastal Plain aquifer system*

FY04 Start — Covered South Carolina and North Carolina of the Southeastern Coastal Plain aquifer system -- Completed

 23 (partially covered)

Basin and Range basin-fill and carbonate-rock aquifers (Great Basin)

FY07 Start -- Completed

1a

Central Valley aquifer system

FY04 Start — Completed

5

Columbia Plateau basaltic-rock and basin-fill aquifers

FY08 Start -- Completed

7

Denver Basin aquifer system*

FY04 Start -- Completed

Floridan aquifer system

FY10 Start -- Underway

9

Lake Michigan Basin aquifers*

FY05 Start —Great Lakes Water Availability and Use Pilot -- Completed

High Plains aquifer

FY09 Start — Only Northern High Plains modeled (forecasting) -- Completed

10

Middle Rio Grande Basin aquifers*

Completed 2002

Mississippi River Valley alluvial aquifer

FY06 Start — Done along with the Mississippi Embayment aquifer system

12

Mississippi Embayment aquifer system

FY06 Start — Done along with the Mississippi River Valley aquifer system

13

Northern Atlantic Coastal Plain aquifer system

FY11 Start -- Completed

15

Lower Tertiary aquifers (WY, MT, ND, SD)*

FY12 Start -- Part of the Northern Great Plains aquifer system also called Williston and Powder River Basins (only Williston Basin modeled) -- Underway

Volcanic-rock aquifers (Hawaii)

 FY13 Start -- Underway

29

Glacial aquifer system inclusive of Glacial sand and gravel aquifers

FY12 Start -- Parts already studied under the Lake Michigan Basin study and contains many separate basins over the entire width of the Nation -- Underway.

28

Pennsylvanian & Mississippian aquifer system of the Appalachian Plateaus

FY13 Start -- Underway

14 (partially covered)

Ozark Plateaus aquifer system (KS, MO, AR, OK)*

FY13 Start -- Underway

Pacific Northwest basaltic-rock and basin-fill aquifers

FY15 Start – Hydrogeologic framework focus—Underway

17

GROUP II — Principal aquifers that comprise well defined potential study areas

Biscayne aquifer

2

Edwards-Trinity aquifer system

8

Intermediate aquifer system (Florida)**

30

Puget Sound aquifer system

18

Roswell Basin aquifer system

20

Snake River Plain basaltic-rock and basin-fill aquifers

22

Southeastern Coastal Plain aquifer system**

Part in SC covered in Carolina Coastal Plain study, but parts in TN, MS, AL, and GA not studied.

23

Coastal lowlands aquifer system

Recommend combined study with coastal uplands.

6

Texas coastal uplands aquifer system

Recommend combined study with coastal lowlands.

25

Willamette Lowland basin-fill aquifers

27

GROUP III — Principal aquifers that require preliminary work to refine approach and study boundaries

Basin and Range basin-fill aquifers**

Mojave and Sonoran Deserts part of this system have not been covered; the Great Basin Desert portion has.

1b

California Coastal Basin aquifers

3

Cambrian-Ordovician aquifer system**

Parts already studied under the Lake Michigan Basin study.

4

Colorado Plateau aquifers*

Early Mesozoic Basin aquifers*

Lower Cretaceous aquifers (IA, KS, MN and NE only)

11

Mississippian aquifers**

Parts already studied under the Lake Michigan Basin study and Pennsylvanian & Mississippian aquifer system.

14

Northeast US Igneous and Metamorphic aquifers*

Northern Rocky Mountains intermontane basins aquifer system

16

Pennsylvanian aquifers*

 Parts already studied under the Pennsylvanian & Mississippian aquifer system.

Piedmont*

Rio Grande aquifer system**

Parts covered under the Middle Rio Grande Study (late 1990s and early 2000s)

19

Silurian-Devonian aquifers**

Parts already studied under the Lake Michigan Basin study.

21

Surficial aquifer system (southeastern United States) **

Being partially addressed in the Floridan aquifer system study but Surficial aquifer system is not major focus.

24

Valley and Ridge carbonate-rock and other aquifers

26