Wood, 1985

McManus and Sloto,

1994, 1996

Wood, 1984

599

600

600

580

580 580

580

560

560

540

540

560

560

600

600

600

600

580

580

560

560

540

540

520 520

520 500

500

480 500

500

520

500

500

480

480

500

480

460

440

440

420

420

460

480

460 420

400

380

400

400

400

420

420 380

360

360 340 340320

320

300

360

340 320

320

340 360

380 38

0

360340

340

320

340

320

300

300

280

280

260

260

320

340

320

320

300 34

0

360380

360

380

400

400

400

400

360 380

380

400

400

420

420

440

440

460

380

380

400

400

420

420 420

380 40

0

440 440

440

460

480

500

500

540

540

540

580

540

580 600

560

600

580

560

560

580

540

540

540

560

500

500

500

500

480

480

480

480

460

460

460

460

440

440

440

440

440

460

420

420

420

420

420

420

420

420

400

400

400

400

400

400 400

400

420

420

380

380

380

380

380 380 380

380

380

380

380

380

380

400

420

420

440

360

360

360

360

360

360

360

360

360

340

340

340

340

340

340

340

340

340

340

360 380

380

400

400

400

420

440

440

320

320

320

320

320

320

320

320

300

300

300

300

300

300

320

340

340

360

360

380

380

400

280

280

280

280

280

300

260

400

400

400

400

400

400

420

420

420

440

440

440

360

360

360

340

340

320

440

440

460

460 420

440

Prepared in cooperation with the CHESTER COUNTY WATER RESOURCES AUTHORITY SCIENTIFIC INVESTIGATIONS MAP 2995

Sheet 2 of 2

75° 55' 75° 52' 30" 75° 50' 75° 47' 30" 75° 45'

420

46039° 52' 30" 563

576

591 456

560596 600 409 431

440

449

444

587

440410610 558597

558 412 346520 456 562

458 424372 344

437 415

360518 335489 432 348

362 360 510

368340492

586

360 424

327

393472 331 536

586 319 409409419474

328 400 307308592 408546 402

580 534 359

516 370

413 375 462

577 286378

469 284

446341 291 453442520 331 460

537 455 393

449 281 540 447 441

480 410

39° 50' 425 428523 464497

340

287549

275493493493 400520 320427531 351

442 376 320

313

327 340

385

376 499

264450

370

334431

418 320

408479 410

429 520 399399399322400

366386435391 339 496

292 550

408 407451 420395487

426 504

354473 372531 437

333348 276360433

413

395 278461527 478 281511 395 382 340

359 334355

376 359

520 355397 397390

331 304

399 385

39° 47' 30" EXPLANATION

STUDY AREA BOUNDARY 365

393360 POTENTIOMETRIC SURFACE CONTOUR--Shows the altitude of the

potentiometric surface as defined by measured water levels in wells, altitudes of streams, springs, and topography. Contours are dashed where approximately located. Contour interval is 20 feet. Altitude in feet above National Geodetic Vertical Datum of 1929.

WATER-LEVEL MEASUREMENT SITES--Symbol gives location of site. Number is altitude of water level in feet above National Geodetic Vertical Datum of 1929. Sites outside the study area are shown if they were used to contour the potentiometric surface.

449 ALTITUDE OF STATIC WATER LEVEL IN WELL

341 ALTITUDE OF FLOWING SPRING

McManus, 1990

Rowland, 2000 Senior and Garges, 1989

Eden, 1998

Eden and Schneider, McManus, 1992

REFERENCES FOR COMPLETED POTENTIOMETRIC MAPS CITED IN FIGURE 1

Aichele, S.S., and Wood, C.R., 1996, Altitude and con- Hale, L.B., 2006b, Altitude and configuration of the potentiometric Mohammad, Abdul, 2000, Altitude and configuration Senior, L.A., and Garges, J.A., 1989, Altitude and con­figuration of the potentiometric surface in the surface in the lower White Clay Creek and upper of the potentiometric surface in upper Elk Creek figuration of the potentiometric surface in the Tri­crystalline and metasedimentary rocks in East Christina River Basins including portions of Franklin, watershed, Chester County, Pennsylvania, assic sandstones and shales, northeastern Chester

Brandywine, Upper Uwchlan, and Uwchlan London, Britain, New Garden, and New London Townships, January through June 1999: U.S. Geological Survey County, Pennsylvania, September 1987 through Townships and parts of Caln, East Caln, and West Chester County, Pennsylvania, June through September Open-File Report 99-475, 1 plate, scale 1:24,000. January 1988: U.S. Geological Survey Water­Whiteland Townships, Chester County, Pennsyl­ 2005: U.S. Geological Survey Scientific Investigations Resources Investigations Report 89-4043, 1 plate, vania, April 1993 through June 1994: U.S. Geo­ Map 2939, 1 plate, scale 1:24,000. Mohammad, Abdul, 2001, Altitude and configuration of scale 1:24,000. logical Survey Open-File Report 96-338, 1 plate, the potentiometric surface in the lower Elk scale 1:24,000. McGovern, J.E., Bossert, April, and Wettstein, W.C., Creek watershed, Chester County, Pennsylvania, Sloto, R.A., 1984, Water-table contour map of the car­

1996, Altitude and configuration of the potentio­ March through September 2000: U.S. Geological bonate rocks of eastern Chester County, Pennsyl-Eden, K.S., 1998, Altitude and configuration of the metric surface in the crystalline and metasedimen­ Survey Open-File Report 01-329, 1 plate, scale vania: U.S. Geological Survey Open-File Report

Sloto, 1984 potentiometric surface in Honey Brook and West tary rocks in Valley and West Brandywine 1:24,000. 84-235, 1 plate, scale 1:24,000. Nantmeal Townships, and Honey Brook and Townships, Chester County, Pennsylvania, May Elverson Boroughs, Chester County, Pennsylvania, 1992 through August 1993: U.S. Geological Survey Mohammad, Abdul, 2002, Altitude and configuration Vogel, K.L., Miller, W.E., and McManus, B.C., 1991, April through September 1997: U.S. Geological Open-File Report 96-339, 1 plate, scale 1:24,000. of the potentiometric surface in Highland and Altitude and configuration of the water-level sur­Survey Open-File Report 98-93, 1 plate, scale West Fallowfield Townships, Chester County, face in the lower Paleozoic and Precambrian 1:24,000. McManus, B.C., 1990, Altitude and configuration of the Pennsylvania, March through July 2001: U.S. crystalline rocks of the Red Clay Creek basin,

1998

McGovern, Bossert,

Aichele and Wood, 1996and Wettstein,

1996 Public water, not

enough wells to map potentiometric surface in the Triassic sandstones Geological Survey Open-File Report 02-167, Chester County, Pennsylvania, and New CastleWettstein and Wood, 1996

Garges, 1986

Garges, 1998

SHEET 1

Eden, K.S., and Schneider, F.M., 1998, Altitude and con­figuration of the potentiometric surface in Wal­lace Township, Chester County, Pennsylvania, February 1996 through June 1997: U.S. Geologi­cal Survey Open-File Report 98-187, 1 plate, scale 1:24,000.

Garges, J.A., 1986, Ground-water levels in lower Paleo­zoic and Precambrian crystalline rocks, southeast­ern Chester County, Pennsylvania, July and

and shales, northern Chester County, Pennsylva­nia, October 1989 through March 1990: U.S. Geological Survey Water-Resources Investigation Report 90-4114, 1 plate, scale 1:24,000.

McManus, B.C., 1992, Altitude and configuration of the potentiometric surface in the crystalline and metasedimentary rocks, northern Chester County, Pennsylvania, May through October 1990: U.S. Geological Survey Water-Resources Investigations

1 plate, scale 1:24,000.

Mohammad, Abdul, 2004, Altitude and configuratoin of the potentiometric surface in West Fallowfield, Upper Oxford, and Lower Oxford Townships, Chester County, Pennsylvania, March through July 2002: U.S. Geological Survey Open-File Report 03-262, 1 plate, scale 1:24,000.

Mohammad, Abdul, 2005, Altitude and configuration

County, Delaware, June through October 1989 and March 1990: U.S. Geological Survey Water­Resources Investigations Report 91-4004, 1 plate, scale 1:24,000.

Wettstein, W.C., and Wood, C.R., 1996, Altitude and configuration of the potentiometric surface in the crystalline and metasedimentary rocks in Sads­bury, West Caln, and West Sadsbury Townships, Chester County, Pennsylvania, April 1993

Mohammad, 2002 Wood, Wettstein, Aichele, Joyce,

and Schneider, 1996

Vogel, Miller, and McManus, 1991

August 1986: U.S. Geological Survey Water­Resources Investigations Report 86-4352, 1 plate, scale 1:24,000.

Garges, J.A., 1988, Ground-water levels in lower Paleo­zoic and Precambrian crystalline rocks of East

Report 91-4182, 1 plate, scale 1:24,000.

McManus, B.C., and Sloto, R.A., 1994, Altitude and configuration of the potentiometric surface, May and June 1993, and change in water level 1983­93, in the carbonate rocks in part of East Whiteland

of the potentiometric surface in part of Lower Oxford, East Nottingham, and West Nottingham Townships, and in part of the Borough of Oxford, Chester County, Pennsylvania, April through June 2003: U.S. Geological Survey Scientific Investigations Map 2876, 1 plate, scale 1:24,000.

through August 1994: U.S. Geological Survey Open-File Report 96-340, 1 plate, scale 1:24,000.

Wood, C.R., 1984, Ground-water levels in the carbonate

rocks of central Chester County, Pennsylvania, May 18 to June 15, 1984: U.S. Geological Survey

Mohammad, 2004

Mohammad, 2005

Mohammad, 2001

Mohammad, 2000

Hale, 2006b

SHEET 2

Figure 1. Areas in Chester County where potentiometric­surface mapping has been completed. (Shaded area shows area mapped for this study.)

Bradford and West Bradford Townships, Chester County, Pennsylvania, July and August 1987: U.S. Geological Survey Water-Resources Investi­gations Report 88-4052, 1 plate, scale 1:24,000.

Hale, L.B., 2006a, Altitude and configuration of the potentiometric surface in East Nottingham and West Nottingham Townships, Chester County, Pennsylvania, April through June 2004: U.S. Geological Survey Scientific Investigations Map 2911, 1 plate, scale 1:24,000.

and Charlestown Townships, Chester County, Pennsylvania: U.S. Geological Survey Open-File

Report 93-659, 1 plate, scale 1:24,000.

McManus, B.C., and Sloto, R.A., 1996, Altitude and configuration of the potentiometric surface, December 6, 1994, in the carbonate rocks in part of East Whiteland and Charlestown Townships, Chester County, Pennsylvania: U.S. Geological Survey Open-File Report 96-367, 1 plate, scale

Rowland, C.J., 2000, Altitude and configuration of the potentiometric surface in Warwick and East Nant­meal Townships, Chester County, Pennsylvania, July through December 1998: U.S. Geological Survey Open-File Report 99-458, 1 plate, scale 1:24,000.

Open-File Report 84-715, 1 plate, scale 1:24,000.

Wood, C.R., 1985, Ground-water levels in the lower Paleozoic carbonate rocks of western Chester Valley, Chester County, Pennsylvania, November, 1984: U.S. Geological Survey Water-Resources Investigations Report 85-4224, 1 plate, scale 1:24,000.

Wood, C.R., Wettstein, W.C., Aichele, S.S., Joyce, James,

Hale, 2006a 1:24,000. and Schneider, F.M., 1996, Altitude and

configuration of the potentiometric surface in the crystalline and metasedimentary rocks in Bir­mingham, Newlin, Pennsbury, and Pocopson Townships and parts of East Marlborough and Kennett Townships, Chester County, Pennsylvania, June 1994 through November 1995: U.S. Geological Survey Open-File Report 96-336, 1 plate, scale 1:24,000.

ALTITUDE AND CONFIGURATION OF THE POTENTIOMETRIC SURFACE IN THE UPPER WHITE CLAY CREEK AND LOWER WEST BRANCH BRANDYWINE CREEK BASINS INCLUDING PORTIONS OF PENN, LONDON GROVE, NEW GARDEN, LONDONDERRY, WEST MARLBOROUGH, HIGHLAND, AND EAST FALLOWFIELD TOWNSHIPS AND

WEST GROVE, AVONDALE, MODENA, AND SOUTH COATESVILLE BOROUGHS, CHESTER COUNTY, PENNSYLVANIA, MAY THROUGH JULY 2006

By LINDSAY B. HALE

2007

374