577:
36:
52:
733:. A major tributary basin, the Double Pipe Creek watershed, is also impaired by these pollutants. A 2012 MDE report said that fish and other aquatic life in the river were severely impacted by pollution and
685:
The vegetation of the watershed is very similar to what one would expect to find through the
Piedmont and valley and ridge regions, with some invasive species that threaten the balance of the ecosystem.
576:
3273:
1524:
2983:
3238:
2988:
3243:
2998:
1626:
760:. In the 1990s the watershed was part of a national water quality demonstration project sponsored by USDA, which helped farmers reduce fertilizer usage and reduced discharges of
3593:
3248:
1658:
3403:
3028:
2027:
1570:
425:
3473:
3053:
3033:
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1920:
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1033:
3463:
3298:
2615:
2196:
2086:
543:, which translates to "river with many bends." (However, another local tradition asserts that "Monocacy" means "well-fenced garden" in an Indian language.)
2310:
2296:
3453:
3383:
3003:
2282:
1577:
3498:
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3138:
3078:
2289:
2081:
2017:
1674:
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3423:
3413:
3568:
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1086:
3468:
3398:
3323:
3103:
3018:
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1000:
3558:
3448:
3303:
3253:
3148:
3013:
2968:
2101:
1605:
1065:
3796:
3781:
3203:
3048:
2763:
2076:
1735:
934:
3443:
3343:
3128:
2037:
3776:
954:
2338:
2191:
1106:
994:
677:
The 970 square mile watershed averages a flow of 600 million gallons per day (Mgal/d) at the mouth where it enters the
Potomac River.
3801:
3158:
2579:
2411:
2395:
2374:
2222:
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2201:
1101:
652:
1011:
2923:
2328:
253:
1710:
1668:
1091:
854:
711:
3073:
2323:
2304:
2276:
1475:
1332:
1017:
974:
2333:
1653:
1213:
1206:
1096:
3483:
3278:
1226:
1028:
3433:
2708:
1720:
1058:
168:
694:
The State of
Maryland designated the Monocacy as a Maryland Scenic River in 1974. However, it has one of the greatest
3163:
2993:
1221:
528:
is 58.5 miles (94.1 km) long, with a drainage area of about 970 square miles (2,500 km). It is the largest
3573:
3368:
3363:
1879:
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805:
741:
628:
450:
1006:
3791:
3578:
3038:
1490:
1432:
2963:
2918:
2389:
2368:
2096:
1849:
1517:
892:
871:
782:
745:
3263:
3198:
3188:
2572:
2176:
1352:
1051:
547:
913:
3588:
3548:
3478:
3333:
3308:
2233:
1697:
1510:
1425:
616:
3786:
3538:
3528:
2703:
2166:
2161:
1639:
1531:
1503:
1279:
1272:
656:
620:
555:
446:
3634:
3543:
3488:
3428:
3258:
3093:
2868:
2670:
2265:
2181:
2150:
2131:
2116:
1994:
1987:
1800:
1645:
1418:
1388:
1362:
1237:
1195:
1189:
1182:
644:
624:
110:
3328:
3123:
3113:
3068:
2207:
1980:
1539:
1485:
1480:
1244:
695:
559:
20:
662:
About 60% of the
Monocacy watershed is dedicated to agricultural use; about 33% of the watershed is
3518:
3063:
2565:
2007:
1689:
1591:
632:
596:
454:
146:
113:
3771:
3699:
3213:
2883:
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2403:
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1754:
1452:
1411:
1375:
1170:
777:
3684:
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3654:
3293:
3023:
2888:
2823:
2645:
2492:
2467:
2381:
2111:
2071:
951:
837:
3750:
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3508:
3118:
2913:
2813:
2743:
2718:
2698:
2693:
2527:
1634:
3619:
3730:
3715:
3043:
2928:
2788:
2758:
2683:
2487:
2482:
1940:
1663:
1200:
823:
8:
3740:
3735:
3694:
3288:
3088:
2733:
1681:
1393:
734:
667:
328:
231:
41:
3664:
3649:
3193:
2938:
2898:
2848:
2507:
2502:
2457:
2214:
2066:
1829:
719:
567:
551:
3725:
3659:
3283:
3178:
3133:
3083:
3008:
2893:
2635:
2522:
2032:
1562:
1553:
1546:
1251:
648:
583:
563:
429:
851:
801:
U.S. Geological Survey. National
Hydrography Dataset high-resolution flowline data.
3408:
3358:
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3313:
3173:
3058:
2863:
2828:
2610:
2512:
2472:
2357:
2246:
2012:
1935:
1814:
1730:
1469:
1306:
1111:
600:
473:
142:
73:
3639:
3629:
3533:
3268:
3098:
2973:
2903:
2873:
2818:
2768:
2748:
2723:
2678:
2227:
2121:
1835:
1619:
1598:
1326:
1321:
1287:
978:
971:
958:
858:
809:
753:
640:
636:
458:
433:
935:
Watershed Report for
Biological Impairment of the Lower Monocacy River Watershed
3689:
3624:
3563:
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3353:
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2843:
2838:
2833:
2773:
2738:
2655:
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2605:
2452:
2061:
2053:
2022:
1974:
1969:
1950:
1795:
1463:
1382:
1296:
727:
699:
521:
517:
3765:
3669:
3513:
3143:
2853:
2793:
2783:
2753:
2728:
2713:
2660:
2600:
2517:
2462:
2442:
2047:
2002:
1906:
1896:
1780:
1775:
1715:
1405:
1346:
1316:
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1131:
1074:
715:
513:
268:
255:
239:
219:
183:
170:
154:
90:
3644:
3393:
3348:
3208:
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2497:
2318:
2106:
1964:
1886:
1806:
1705:
1340:
1121:
608:
3720:
3603:
3493:
3233:
3228:
3223:
2858:
2803:
2778:
2640:
2630:
2625:
2620:
2542:
2532:
2042:
1956:
1945:
1912:
1870:
1842:
1819:
1770:
1368:
1265:
1258:
802:
214:
550:
lies alongside part of the river, marking an 1864 engagement during the
3553:
3523:
3388:
3153:
2537:
2477:
2126:
1901:
1856:
1765:
1357:
1043:
765:
671:
612:
2557:
2447:
2186:
1790:
1785:
861:; Maryland Department of Natural Resources, Annapolis, MD. 1990. p.3.
749:
703:
509:
840:. Monocacy Scenic River Citizens Advisory Board. 2009. Final Report.
2241:
1126:
1116:
761:
740:
Some farmers in the
Monocacy watershed participate in the national
730:
723:
604:
529:
235:
150:
100:
757:
536:
35:
1038:
663:
874:. Baltimore, MD: Maryland Department of the Environment (MDE)
707:
525:
893:"TMDLs and Water Quality Plans for the Lower Monocacy River"
872:"TMDLs and Water Quality Plans for the Upper Monocacy River"
1022:
500:
494:
479:
51:
651:
in
Carroll County; other Pennsylvania tributaries include
488:
826:(Report). Frederick, MD: Frederick County Council. 2019.
952:"Conservation Security Program - Monocacy Watershed."
914:"TMDLs and Water Quality Plans for Double Pipe Creek"
497:
491:
485:
950:
U.S. Natural
Resources Conservation Service (NRCS).
482:
476:
852:"Monocacy Scenic River Study and Management Plan."
995:Monocacy Scenic River Water Trail Map & Guide
830:
582:Confluence of Monocacy and Potomac Rivers by the
3763:
748:(USDA), designed to help stem pollution due to
627:. Maryland tributaries include Furnace Branch,
2264:
2149:
2573:
1059:
65:
714:(MDE) has listed the Monocacy with impaired
972:"Demonstration Projects – Selected Impacts"
698:problems in the state due in large part to
2580:
2566:
1066:
1052:
1007:Monocacy & Catoctin Watershed Alliance
2432:
1073:
1018:Monocacy Basin Stream Monitoring Project
997:- Chesapeake Bay Gateways Network (2006)
1753:
1451:
1169:
822:"Chapter 3. The Physical Environment".
3764:
2587:
850:Monocacy Scenic River Advisory Board.
712:Maryland Department of the Environment
19:For other streams named Monocacy, see
2561:
2431:
2355:
2305:South Fork South Branch Potomac River
2277:North Fork South Branch Potomac River
2263:
2148:
1752:
1450:
1168:
1047:
824:Monocacy Scenic River Management Plan
599:, west of the unincorporated town of
360:3,060 cu ft/s (87 m/s)
350:573 cu ft/s (16.2 m/s)
340:1,550 cu ft/s (44 m/s)
3797:Rivers of Adams County, Pennsylvania
3782:Rivers of Frederick County, Maryland
2356:
1136:Streams shown as: Major tributaries
611:border. The river is formed by the
535:The name "Monocacy" comes from the
398:400 cu ft/s (11 m/s)
306:970 sq mi (2,500 km)
13:
3777:Rivers of Carroll County, Maryland
795:
14:
3813:
1003:- Alliance for the Chesapeake Bay
988:
670:and its suburbs form the largest
3802:Tributaries of the Potomac River
3369:Northwest Branch Anacostia River
3364:Northeast Branch Anacostia River
742:Conservation Stewardship Program
575:
472:
50:
34:
16:River in Maryland, United States
1433:Tuscarora Creek (West Virginia)
1214:South Fork Little Cacapon River
1207:North Fork Little Cacapon River
964:
1034:Kayaking/Canoeing the Monocacy
944:
927:
906:
885:
864:
844:
815:
783:List of rivers of Pennsylvania
746:U.S. Department of Agriculture
562:crosses over the river at the
247: • coordinates
162: • coordinates
1:
788:
680:
548:Monocacy National Battlefield
120:Physical characteristics
1014:– C&O Canal Virtual Tour
689:
590:
286: • elevation
201: • elevation
56:The Monocacy River watershed
7:
2390:South Fork Shenandoah River
2369:North Fork Shenandoah River
771:
556:Battle of Monocacy Junction
382: • location
324: • location
227: • location
138: • location
10:
3818:
2266:South Branch Potomac River
2151:North Branch Potomac River
1491:Tuscarora Creek (Maryland)
1389:Little Conococheague Creek
1190:South Branch Potomac River
1183:North Branch Potomac River
1029:Fishing the Monocacy River
812:, accessed August 15, 2011
625:Adams County, Pennsylvania
532:tributary to the Potomac.
394: • average
356: • maximum
346: • minimum
336: • average
18:
3708:
3612:
2947:
2669:
2593:
2438:
2427:
2364:
2351:
2272:
2259:
2157:
2144:
1761:
1748:
1486:Catoctin Creek (Maryland)
1481:Catoctin Creek (Virginia)
1459:
1446:
1177:
1164:
1082:
940:(Report). MDE. July 2012.
696:nonpoint source pollution
560:Chesapeake and Ohio Canal
516:, which empties into the
508:) is a free-flowing left
440:
419:
411:
406:
402:
392:
380:
372:
368:
364:
354:
344:
334:
322:
314:
310:
302:
294:
284:
245:
225:
213:
209:
199:
160:
136:
128:
124:
119:
106:
96:
86:
81:
61:
49:
33:
28:
21:Monocacy (disambiguation)
1001:Monocacy River factsheet
597:Carroll County, Maryland
566:, the largest of the 11
442: • right
205:400 ft (120 m)
1025:– National Park Service
778:List of Maryland rivers
421: • left
298:58 mi (93 km)
290:200 ft (61 m)
66:
3792:Rivers of Pennsylvania
3094:Conococheague (Little)
2493:Jennings Randolph Lake
2468:Breckenridge Reservoir
2112:Popes Creek (Virginia)
2072:Popes Creek (Maryland)
1333:Little Tonoloway Creek
710:in the watershed. The
702:from the 3,500 farms,
674:within the watershed.
2528:Stony River Reservoir
1635:Little Monocacy River
1476:Little Catoctin Creek
1039:USDA-NRCS Plant Facts
386:Bridgeport, Frederick
269:39.22278°N 77.45417°W
184:39.71972°N 77.21750°W
3574:Tuscarora (Monocacy)
2984:Bear (Sideling Hill)
2488:Georgetown Reservoir
2483:Dalecarlia Reservoir
2433:Lakes and reservoirs
2087:Upper Machodoc Creek
1941:Little Hunting Creek
1664:Broad Run (Maryland)
1654:Broad Run (Virginia)
1201:Little Cacapon River
1152:subsubsubtributaries
1112:District of Columbia
1023:Monocacy Battlefield
961:Accessed 2009-03-07.
623:, which flow out of
40:Monocacy River near
3579:Tuscarora (Potomac)
3279:Little Falls Branch
3039:Broad (Susquehanna)
2989:Bear (Youghiogheny)
2709:Blackwater (Little)
2689:Annemessex (Little)
1755:Tidal Potomac River
1736:Little Falls Branch
1682:Little Seneca Creek
1453:Lower Potomac River
1394:Conococheague Creek
1227:Sideling Hill Creek
1171:Upper Potomac River
1145:(subsubtributaries)
595:The river rises in
539:name for the river
407:Basin features
274:39.22278; -77.45417
265: /
189:39.71972; -77.21750
180: /
42:Frederick, Maryland
3787:Rivers of Maryland
3584:Tuscarora (Little)
3244:Indian (Anacostia)
2919:Wicomico (Potomac)
2588:Waters of Maryland
2508:McMillan Reservoir
2503:Little Seneca Lake
2458:Lake Bernard Frank
2215:Little Wills Creek
2067:Port Tobacco River
1830:Washington Channel
1698:Great Seneca Creek
977:2008-10-10 at the
957:2009-03-20 at the
857:2006-09-15 at the
808:2012-03-29 at the
720:nutrient pollution
552:American Civil War
3759:
3758:
3655:Jennings Randolph
3249:Indian (Patuxent)
3084:Collington Branch
3074:Catoctin (Little)
2814:Monocacy (Little)
2744:Choptank (Little)
2555:
2554:
2551:
2550:
2523:Sleepy Creek Lake
2423:
2422:
2347:
2346:
2255:
2254:
2140:
2139:
2033:Chopawamsic Creek
1744:
1743:
1578:Big Hunting Creek
1563:Little Pipe Creek
1547:Double Pipe Creek
1442:
1441:
1252:Capon Springs Run
1222:Fifteenmile Creek
1012:Monocacy Aqueduct
981:October 31, 2006.
659:in Adams County.
649:Double Pipe Creek
584:Monocacy Aqueduct
564:Monocacy Aqueduct
464:
463:
430:Double Pipe Creek
3809:
3549:Town (Tred Avon)
3499:Soapstone Branch
3479:Seneca (Potomac)
3339:Minnehaha Branch
3239:Hunting (Little)
3029:Broad (Choptank)
3024:Bread and Cheese
2789:Magothy (Little)
2684:Annemessex (Big)
2582:
2575:
2568:
2559:
2558:
2513:Mount Storm Lake
2473:Brushy Fork Lake
2429:
2428:
2414:
2407:
2398:
2384:
2377:
2358:Shenandoah River
2353:
2352:
2313:
2299:
2292:
2285:
2261:
2260:
2247:Green Spring Run
2236:
2217:
2210:
2146:
2145:
2082:Piccowaxen Creek
2056:
2018:Chicamuxen Creek
2013:Mattawoman Creek
1997:
1990:
1983:
1959:
1936:Piscataway Creek
1915:
1889:
1882:
1880:Northeast Branch
1873:
1866:
1864:Northwest Branch
1859:
1852:
1845:
1815:Boundary Channel
1809:
1750:
1749:
1731:Cabin John Creek
1700:
1693:
1684:
1677:
1675:Dry Seneca Creek
1648:
1629:
1622:
1615:
1608:
1601:
1594:
1587:
1580:
1573:
1566:
1557:
1543:
1534:
1527:
1520:
1513:
1506:
1470:Shenandoah River
1448:
1447:
1435:
1428:
1421:
1414:
1402:
1385:
1378:
1371:
1349:
1335:
1311:
1307:Bearwallow Creek
1300:
1291:
1282:
1275:
1268:
1261:
1254:
1247:
1240:
1216:
1209:
1166:
1165:
1155:
1146:
1141:
1087:Cities and towns
1068:
1061:
1054:
1045:
1044:
982:
968:
962:
948:
942:
941:
939:
931:
925:
924:
922:
921:
910:
904:
903:
901:
900:
889:
883:
882:
880:
879:
868:
862:
848:
842:
841:
834:
828:
827:
819:
813:
803:The National Map
799:
744:operated by the
706:operations, and
645:Frederick County
579:
507:
506:
503:
502:
499:
496:
493:
490:
487:
484:
481:
478:
443:
436:, Furnace Branch
432:, Israel Creek,
422:
395:
388:County, Maryland
383:
357:
347:
337:
325:
280:
279:
277:
276:
275:
270:
266:
263:
262:
261:
258:
202:
195:
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192:
191:
190:
185:
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176:
173:
163:
139:
77:
69:
54:
38:
26:
25:
3817:
3816:
3812:
3811:
3810:
3808:
3807:
3806:
3762:
3761:
3760:
3755:
3704:
3608:
3539:Town (Patuxent)
3474:Seneca (Middle)
3439:Rockburn Branch
3414:Plumtree Branch
3034:Broad (Potomac)
2979:Bear (Patapsco)
2951:
2949:
2943:
2665:
2589:
2586:
2556:
2547:
2434:
2419:
2410:
2401:
2394:
2380:
2373:
2360:
2343:
2309:
2295:
2288:
2281:
2268:
2251:
2232:
2228:Patterson Creek
2213:
2206:
2153:
2136:
2122:Yeocomico River
2117:St. Marys River
2052:
1993:
1986:
1979:
1955:
1911:
1885:
1878:
1869:
1862:
1855:
1848:
1841:
1836:Anacostia River
1805:
1757:
1740:
1696:
1687:
1680:
1673:
1644:
1625:
1620:Ballenger Creek
1618:
1611:
1604:
1599:Linganore Creek
1597:
1590:
1585:Tuscarora Creek
1583:
1576:
1569:
1560:
1551:
1537:
1530:
1523:
1516:
1509:
1502:
1455:
1438:
1431:
1424:
1417:
1410:
1398:
1381:
1374:
1367:
1345:
1331:
1327:Tonoloway Creek
1322:Warm Spring Run
1303:
1294:
1288:Grassy Lick Run
1285:
1278:
1271:
1264:
1257:
1250:
1243:
1236:
1212:
1205:
1173:
1160:
1149:
1144:
1139:
1078:
1072:
991:
986:
985:
979:Wayback Machine
969:
965:
959:Wayback Machine
949:
945:
937:
933:
932:
928:
919:
917:
912:
911:
907:
898:
896:
891:
890:
886:
877:
875:
870:
869:
865:
859:Wayback Machine
849:
845:
836:
835:
831:
821:
820:
816:
810:Wayback Machine
800:
796:
791:
774:
735:loss of habitat
692:
683:
641:Ballenger Creek
637:Linganore Creek
629:Tuscarora Creek
593:
586:
580:
475:
471:
459:Ballenger Creek
451:Tuscarora Creek
441:
434:Linganore Creek
420:
393:
387:
381:
355:
345:
335:
323:
287:
273:
271:
267:
264:
259:
256:
254:
252:
251:
248:
228:
200:
188:
186:
182:
179:
174:
171:
169:
167:
166:
161:
137:
71:
57:
45:
24:
17:
12:
11:
5:
3815:
3805:
3804:
3799:
3794:
3789:
3784:
3779:
3774:
3772:Monocacy River
3757:
3756:
3754:
3753:
3748:
3743:
3738:
3733:
3728:
3723:
3718:
3712:
3710:
3706:
3705:
3703:
3702:
3697:
3692:
3690:Schumaker Pond
3687:
3682:
3677:
3672:
3667:
3662:
3657:
3652:
3647:
3642:
3637:
3632:
3627:
3622:
3616:
3614:
3610:
3609:
3607:
3606:
3601:
3596:
3591:
3586:
3581:
3576:
3571:
3566:
3561:
3556:
3551:
3546:
3544:Town (Potomac)
3541:
3536:
3531:
3526:
3521:
3516:
3511:
3506:
3501:
3496:
3491:
3486:
3481:
3476:
3471:
3466:
3461:
3456:
3451:
3446:
3441:
3436:
3431:
3429:Rock (Potomac)
3426:
3421:
3416:
3411:
3406:
3401:
3396:
3391:
3386:
3381:
3376:
3371:
3366:
3361:
3356:
3351:
3346:
3341:
3336:
3331:
3326:
3321:
3316:
3311:
3306:
3301:
3296:
3291:
3286:
3281:
3276:
3271:
3266:
3261:
3256:
3251:
3246:
3241:
3236:
3231:
3226:
3221:
3216:
3211:
3206:
3201:
3196:
3191:
3186:
3181:
3176:
3171:
3166:
3161:
3156:
3151:
3146:
3141:
3136:
3131:
3126:
3121:
3116:
3111:
3106:
3101:
3096:
3091:
3086:
3081:
3076:
3071:
3066:
3061:
3056:
3051:
3046:
3041:
3036:
3031:
3026:
3021:
3016:
3011:
3006:
3001:
2996:
2991:
2986:
2981:
2976:
2971:
2966:
2961:
2955:
2953:
2945:
2944:
2942:
2941:
2936:
2931:
2926:
2921:
2916:
2911:
2906:
2901:
2896:
2891:
2886:
2881:
2876:
2871:
2866:
2861:
2856:
2851:
2846:
2841:
2836:
2831:
2826:
2821:
2816:
2811:
2806:
2801:
2796:
2791:
2786:
2781:
2776:
2771:
2766:
2761:
2756:
2751:
2746:
2741:
2736:
2731:
2726:
2721:
2716:
2711:
2706:
2701:
2696:
2691:
2686:
2681:
2675:
2673:
2667:
2666:
2664:
2663:
2658:
2653:
2648:
2643:
2638:
2633:
2628:
2623:
2618:
2613:
2608:
2603:
2597:
2595:
2594:Bays/estuaries
2591:
2590:
2585:
2584:
2577:
2570:
2562:
2553:
2552:
2549:
2548:
2546:
2545:
2540:
2535:
2530:
2525:
2520:
2515:
2510:
2505:
2500:
2495:
2490:
2485:
2480:
2475:
2470:
2465:
2460:
2455:
2453:Lake Artemesia
2450:
2445:
2439:
2436:
2435:
2425:
2424:
2421:
2420:
2418:
2417:
2416:
2415:
2408:
2399:
2387:
2386:
2385:
2378:
2365:
2362:
2361:
2349:
2348:
2345:
2344:
2342:
2341:
2336:
2331:
2326:
2321:
2316:
2315:
2314:
2302:
2301:
2300:
2293:
2286:
2273:
2270:
2269:
2257:
2256:
2253:
2252:
2250:
2249:
2244:
2239:
2238:
2237:
2225:
2220:
2219:
2218:
2211:
2199:
2194:
2189:
2184:
2179:
2174:
2169:
2164:
2158:
2155:
2154:
2142:
2141:
2138:
2137:
2135:
2134:
2129:
2124:
2119:
2114:
2109:
2104:
2099:
2097:Wicomico River
2094:
2089:
2084:
2079:
2074:
2069:
2064:
2062:Nanjemoy Creek
2059:
2058:
2057:
2054:Accokeek Creek
2045:
2040:
2035:
2030:
2025:
2023:Quantico Creek
2020:
2015:
2010:
2005:
2000:
1999:
1998:
1991:
1984:
1975:Occoquan River
1972:
1970:Pomonkey Creek
1967:
1962:
1961:
1960:
1951:Accotink Creek
1948:
1943:
1938:
1933:
1928:
1923:
1918:
1917:
1916:
1904:
1899:
1894:
1893:
1892:
1891:
1890:
1876:
1875:
1874:
1860:
1853:
1846:
1832:
1827:
1822:
1817:
1812:
1811:
1810:
1798:
1796:Foundry Branch
1793:
1788:
1783:
1778:
1773:
1768:
1762:
1759:
1758:
1746:
1745:
1742:
1741:
1739:
1738:
1733:
1728:
1723:
1718:
1713:
1708:
1703:
1702:
1701:
1694:
1685:
1678:
1666:
1661:
1656:
1651:
1650:
1649:
1637:
1632:
1631:
1630:
1623:
1616:
1609:
1602:
1595:
1588:
1581:
1574:
1567:
1558:
1554:Big Pipe Creek
1549:
1544:
1535:
1528:
1521:
1514:
1507:
1497:Monocacy River
1493:
1488:
1483:
1478:
1473:
1466:
1464:Antietam Creek
1460:
1457:
1456:
1444:
1443:
1440:
1439:
1437:
1436:
1429:
1422:
1415:
1408:
1403:
1396:
1391:
1386:
1383:Tilhance Creek
1379:
1372:
1365:
1360:
1355:
1350:
1343:
1338:
1337:
1336:
1324:
1319:
1314:
1313:
1312:
1301:
1297:Tearcoat Creek
1292:
1283:
1276:
1269:
1262:
1255:
1248:
1241:
1229:
1224:
1219:
1218:
1217:
1210:
1198:
1193:
1186:
1178:
1175:
1174:
1162:
1161:
1159:
1158:
1157:
1156:
1147:
1142:
1140:subtributaries
1134:
1129:
1124:
1119:
1114:
1109:
1104:
1099:
1094:
1089:
1083:
1080:
1079:
1071:
1070:
1063:
1056:
1048:
1042:
1041:
1036:
1031:
1026:
1020:
1015:
1009:
1004:
998:
990:
989:External links
987:
984:
983:
963:
943:
926:
905:
884:
863:
843:
838:"The Monocacy"
829:
814:
793:
792:
790:
787:
786:
785:
780:
773:
770:
768:to the river.
728:fecal coliform
691:
688:
682:
679:
666:. The city of
592:
589:
588:
587:
581:
574:
570:on the canal.
522:Chesapeake Bay
518:Atlantic Ocean
468:Monocacy River
462:
461:
444:
438:
437:
423:
417:
416:
413:
409:
408:
404:
403:
400:
399:
396:
390:
389:
384:
378:
377:
374:
370:
369:
366:
365:
362:
361:
358:
352:
351:
348:
342:
341:
338:
332:
331:
326:
320:
319:
316:
312:
311:
308:
307:
304:
300:
299:
296:
292:
291:
288:
285:
282:
281:
249:
246:
243:
242:
229:
226:
223:
222:
217:
211:
210:
207:
206:
203:
197:
196:
164:
158:
157:
147:Carroll County
140:
134:
133:
130:
126:
125:
122:
121:
117:
116:
108:
104:
103:
98:
94:
93:
88:
84:
83:
79:
78:
63:
59:
58:
55:
47:
46:
39:
31:
30:
29:Monocacy River
15:
9:
6:
4:
3:
2:
3814:
3803:
3800:
3798:
3795:
3793:
3790:
3788:
3785:
3783:
3780:
3778:
3775:
3773:
3770:
3769:
3767:
3752:
3749:
3747:
3744:
3742:
3739:
3737:
3734:
3732:
3729:
3727:
3724:
3722:
3719:
3717:
3714:
3713:
3711:
3707:
3701:
3698:
3696:
3695:Woodward Pond
3693:
3691:
3688:
3686:
3683:
3681:
3678:
3676:
3673:
3671:
3668:
3666:
3665:Little Seneca
3663:
3661:
3658:
3656:
3653:
3651:
3650:Bernard Frank
3648:
3646:
3643:
3641:
3638:
3636:
3633:
3631:
3628:
3626:
3623:
3621:
3618:
3617:
3615:
3611:
3605:
3602:
3600:
3597:
3595:
3592:
3590:
3587:
3585:
3582:
3580:
3577:
3575:
3572:
3570:
3567:
3565:
3562:
3560:
3557:
3555:
3552:
3550:
3547:
3545:
3542:
3540:
3537:
3535:
3532:
3530:
3527:
3525:
3522:
3520:
3519:Tenmile Creek
3517:
3515:
3512:
3510:
3507:
3505:
3502:
3500:
3497:
3495:
3492:
3490:
3487:
3485:
3484:Sideling Hill
3482:
3480:
3477:
3475:
3472:
3470:
3467:
3465:
3462:
3460:
3457:
3455:
3452:
3450:
3447:
3445:
3442:
3440:
3437:
3435:
3432:
3430:
3427:
3425:
3422:
3420:
3417:
3415:
3412:
3410:
3407:
3405:
3402:
3400:
3397:
3395:
3392:
3390:
3387:
3385:
3382:
3380:
3377:
3375:
3372:
3370:
3367:
3365:
3362:
3360:
3357:
3355:
3352:
3350:
3347:
3345:
3342:
3340:
3337:
3335:
3332:
3330:
3327:
3325:
3322:
3320:
3317:
3315:
3312:
3310:
3307:
3305:
3302:
3300:
3297:
3295:
3292:
3290:
3289:Little Seneca
3287:
3285:
3282:
3280:
3277:
3275:
3272:
3270:
3267:
3265:
3262:
3260:
3257:
3255:
3252:
3250:
3247:
3245:
3242:
3240:
3237:
3235:
3232:
3230:
3227:
3225:
3222:
3220:
3217:
3215:
3212:
3210:
3207:
3205:
3202:
3200:
3197:
3195:
3192:
3190:
3187:
3185:
3182:
3180:
3177:
3175:
3172:
3170:
3167:
3165:
3162:
3160:
3157:
3155:
3152:
3150:
3147:
3145:
3142:
3140:
3137:
3135:
3132:
3130:
3127:
3125:
3122:
3120:
3117:
3115:
3112:
3110:
3107:
3105:
3102:
3100:
3097:
3095:
3092:
3090:
3089:Conococheague
3087:
3085:
3082:
3080:
3077:
3075:
3072:
3070:
3067:
3065:
3062:
3060:
3057:
3055:
3052:
3050:
3047:
3045:
3042:
3040:
3037:
3035:
3032:
3030:
3027:
3025:
3022:
3020:
3019:Bonnie Branch
3017:
3015:
3012:
3010:
3007:
3005:
3002:
3000:
2997:
2995:
2992:
2990:
2987:
2985:
2982:
2980:
2977:
2975:
2972:
2970:
2967:
2965:
2962:
2960:
2957:
2956:
2954:
2946:
2940:
2937:
2935:
2932:
2930:
2927:
2925:
2922:
2920:
2917:
2915:
2912:
2910:
2907:
2905:
2902:
2900:
2897:
2895:
2892:
2890:
2887:
2885:
2882:
2880:
2877:
2875:
2872:
2870:
2867:
2865:
2862:
2860:
2857:
2855:
2852:
2850:
2847:
2845:
2842:
2840:
2837:
2835:
2832:
2830:
2827:
2825:
2822:
2820:
2817:
2815:
2812:
2810:
2807:
2805:
2802:
2800:
2797:
2795:
2792:
2790:
2787:
2785:
2782:
2780:
2777:
2775:
2772:
2770:
2767:
2765:
2762:
2760:
2757:
2755:
2752:
2750:
2747:
2745:
2742:
2740:
2737:
2735:
2734:Chicamacomico
2732:
2730:
2727:
2725:
2722:
2720:
2717:
2715:
2712:
2710:
2707:
2705:
2702:
2700:
2697:
2695:
2692:
2690:
2687:
2685:
2682:
2680:
2677:
2676:
2674:
2672:
2668:
2662:
2659:
2657:
2654:
2652:
2649:
2647:
2644:
2642:
2639:
2637:
2636:Isle of Wight
2634:
2632:
2629:
2627:
2624:
2622:
2619:
2617:
2614:
2612:
2609:
2607:
2604:
2602:
2599:
2598:
2596:
2592:
2583:
2578:
2576:
2571:
2569:
2564:
2563:
2560:
2544:
2541:
2539:
2536:
2534:
2531:
2529:
2526:
2524:
2521:
2519:
2518:Lake Needwood
2516:
2514:
2511:
2509:
2506:
2504:
2501:
2499:
2496:
2494:
2491:
2489:
2486:
2484:
2481:
2479:
2476:
2474:
2471:
2469:
2466:
2464:
2463:Lake Braddock
2461:
2459:
2456:
2454:
2451:
2449:
2446:
2444:
2443:Lake Accotink
2441:
2440:
2437:
2430:
2426:
2413:
2409:
2405:
2400:
2397:
2393:
2392:
2391:
2388:
2383:
2379:
2376:
2372:
2371:
2370:
2367:
2366:
2363:
2359:
2354:
2350:
2340:
2339:Buffalo Creek
2337:
2335:
2332:
2330:
2327:
2325:
2322:
2320:
2317:
2312:
2308:
2307:
2306:
2303:
2298:
2294:
2291:
2287:
2284:
2280:
2279:
2278:
2275:
2274:
2271:
2267:
2262:
2258:
2248:
2245:
2243:
2240:
2235:
2231:
2230:
2229:
2226:
2224:
2221:
2216:
2212:
2209:
2205:
2204:
2203:
2200:
2198:
2195:
2193:
2192:Limestone Run
2190:
2188:
2185:
2183:
2180:
2178:
2177:Georges Creek
2175:
2173:
2170:
2168:
2165:
2163:
2160:
2159:
2156:
2152:
2147:
2143:
2133:
2130:
2128:
2125:
2123:
2120:
2118:
2115:
2113:
2110:
2108:
2105:
2103:
2100:
2098:
2095:
2093:
2092:Cuckold Creek
2090:
2088:
2085:
2083:
2080:
2078:
2075:
2073:
2070:
2068:
2065:
2063:
2060:
2055:
2051:
2050:
2049:
2048:Potomac Creek
2046:
2044:
2041:
2039:
2036:
2034:
2031:
2029:
2026:
2024:
2021:
2019:
2016:
2014:
2011:
2009:
2008:Powells Creek
2006:
2004:
2003:Neabsco Creek
2001:
1996:
1992:
1989:
1985:
1982:
1978:
1977:
1976:
1973:
1971:
1968:
1966:
1963:
1958:
1954:
1953:
1952:
1949:
1947:
1944:
1942:
1939:
1937:
1934:
1932:
1929:
1927:
1924:
1922:
1919:
1914:
1910:
1909:
1908:
1907:Hunting Creek
1905:
1903:
1900:
1898:
1897:Four Mile Run
1895:
1888:
1884:
1883:
1881:
1877:
1872:
1868:
1867:
1865:
1861:
1858:
1854:
1851:
1847:
1844:
1840:
1839:
1838:
1837:
1833:
1831:
1828:
1826:
1823:
1821:
1818:
1816:
1813:
1808:
1804:
1803:
1802:
1799:
1797:
1794:
1792:
1789:
1787:
1784:
1782:
1781:Maddox Branch
1779:
1777:
1776:Donaldson Run
1774:
1772:
1769:
1767:
1764:
1763:
1760:
1756:
1751:
1747:
1737:
1734:
1732:
1729:
1727:
1724:
1722:
1719:
1717:
1716:Difficult Run
1714:
1712:
1709:
1707:
1704:
1699:
1695:
1691:
1690:Tenmile Creek
1686:
1683:
1679:
1676:
1672:
1671:
1670:
1667:
1665:
1662:
1660:
1659:Sugarland Run
1657:
1655:
1652:
1647:
1643:
1642:
1641:
1638:
1636:
1633:
1628:
1627:Bennett Creek
1624:
1621:
1617:
1614:
1610:
1607:
1603:
1600:
1596:
1593:
1592:Carroll Creek
1589:
1586:
1582:
1579:
1575:
1572:
1568:
1564:
1559:
1555:
1550:
1548:
1545:
1541:
1536:
1533:
1529:
1526:
1522:
1519:
1518:Alloway Creek
1515:
1512:
1508:
1505:
1501:
1500:
1499:
1498:
1494:
1492:
1489:
1487:
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1427:
1423:
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1416:
1413:
1409:
1407:
1406:Opequon Creek
1404:
1401:
1397:
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1387:
1384:
1380:
1377:
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1366:
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1361:
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1356:
1354:
1353:Licking Creek
1351:
1348:
1347:Meadow Branch
1344:
1342:
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1329:
1328:
1325:
1323:
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1318:
1317:Sir Johns Run
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1232:Cacapon River
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1132:West Virginia
1130:
1128:
1125:
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1118:
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1108:
1107:Variant names
1105:
1103:
1100:
1098:
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1090:
1088:
1085:
1084:
1081:
1076:
1075:Potomac River
1069:
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1032:
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839:
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747:
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736:
732:
729:
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721:
717:
716:water quality
713:
709:
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678:
675:
673:
669:
665:
660:
658:
654:
653:Alloway Creek
650:
646:
642:
638:
634:
633:Carroll Creek
630:
626:
622:
618:
614:
610:
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531:
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523:
519:
515:
514:Potomac River
511:
505:
469:
460:
456:
455:Carroll Creek
452:
448:
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435:
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427:
424:
418:
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240:United States
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220:Potomac River
218:
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165:
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155:United States
152:
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141:
135:
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91:United States
89:
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68:
64:
60:
53:
48:
43:
37:
32:
27:
22:
3700:Youghiogheny
3660:Kittamaqundi
3630:Buckel's Bog
3589:Watts Branch
3394:Paint Branch
3349:Muddy Branch
3274:Little Falls
3209:Gwynns Falls
3199:Green Branch
3194:Great Seneca
2969:Arundel Cove
2939:Youghiogheny
2899:Transquaking
2849:Port Tobacco
2808:
2611:Chincoteague
2498:Kingman Lake
2404:Middle River
2319:Lunice Creek
2311:Kettle Creek
2297:Seneca Creek
2223:Evitts Creek
2172:Savage River
2107:Mattox Creek
2102:Monroe Creek
2028:Little Creek
1965:Pohick Creek
1926:Henson Creek
1887:Paint Branch
1850:Watts Branch
1834:
1807:Piney Branch
1711:Watts Branch
1706:Muddy Branch
1669:Seneca Creek
1646:Little River
1606:Israel Creek
1540:Middle Creek
1496:
1495:
1468:
1426:Middle Creek
1412:Abrams Creek
1376:Isaacs Creek
1341:Sleepy Creek
1305:
1188:
1181:
1151:
1122:Pennsylvania
966:
946:
929:
918:. Retrieved
908:
897:. Retrieved
887:
876:. Retrieved
866:
846:
832:
817:
797:
756:runoff from
739:
693:
684:
676:
661:
609:Pennsylvania
594:
545:
541:Monnockkesey
540:
534:
467:
465:
67:Monnockkesey
3751:Triadelphia
3746:Rocky Gorge
3685:Parker Pond
3675:Quarry Lake
3604:Winters Run
3594:Western Run
3454:St. Leonard
3384:Otter Point
3334:Mill Branch
3284:Little Pipe
3229:Herring Run
3224:Herbert Run
3179:Frog Mortar
3164:Fifteenmile
3134:Double Pipe
3004:Big Hunting
2894:Susquehanna
2779:Jones Falls
2543:Warden Lake
2533:Tidal Basin
2412:South River
2396:North River
2382:Smith Creek
2375:Cedar Creek
2283:Laurel Fork
2208:Brush Creek
2202:Wills Creek
2197:Warrior Run
2167:Abram Creek
2162:Stony River
2077:Gambo Creek
2043:Aquia Creek
1957:Daniels Run
1946:Dogue Creek
1921:Broad Creek
1913:Cameron Run
1871:Sligo Creek
1843:Pope Branch
1820:Tiber Creek
1771:Gulf Branch
1640:Goose Creek
1571:Owens Creek
1525:Piney Creek
1511:Marsh Creek
1369:Hogue Creek
1280:North River
1273:Mill Branch
1266:Edwards Run
1259:Dillons Run
1102:Tributaries
617:Marsh Creek
426:Piney Creek
412:Tributaries
272: /
187: /
62:Native name
3766:Categories
3731:Loch Raven
3716:Dalecarlia
3709:Reservoirs
3640:Deep Creek
3635:Centennial
3620:Allen Pond
3554:Towson Run
3524:Thoms Cove
3444:Roland Run
3409:Piscataway
3359:Nassawango
3344:Moores Run
3319:Mattawoman
3314:Marshyhope
3259:Laurel Run
3174:Flintstone
3154:Edge Creek
3139:Dry Seneca
3129:Dorsey Run
3079:Chicamuxen
3059:Cabin John
2864:St. Martin
2829:North East
2704:Blackwater
2656:Sinepuxent
2616:Curtis Bay
2606:Chesapeake
2538:Trout Pond
2478:Burke Lake
2329:Mill Creek
2290:Mill Creek
2234:Mill Creek
2182:Laurel Run
2132:Hull Creek
2127:Coan River
2038:Tank Creek
1931:Swan Creek
1902:Oxon Creek
1857:Hickey Run
1801:Rock Creek
1766:Pimmit Run
1613:Bush Creek
1532:Toms Creek
1504:Rock Creek
1419:Mill Creek
1400:Back Creek
1363:Back Creek
1358:Cherry Run
1238:Lost River
1196:Town Creek
920:2023-01-02
899:2023-01-02
878:2023-01-02
789:References
766:phosphorus
681:Dendrology
672:urban area
657:Toms Creek
621:Rock Creek
613:confluence
447:Toms Creek
303:Basin size
260:77°27′15″W
257:39°13′22″N
175:77°13′03″W
172:39°43′11″N
3741:Prettyboy
3736:Piney Run
3625:Artemesia
3534:Tonoloway
3509:Stony Run
3489:Slaughter
3459:Saltpeter
3424:Principio
3269:Linganore
3099:Conowingo
3044:Broad Run
2994:Beaverdam
2974:Ballenger
2904:Tred Avon
2874:Sassafras
2869:St. Marys
2819:Nanticoke
2769:Gunpowder
2749:Christina
2724:Casselman
2679:Anacostia
2601:Assawoman
2448:Lake Anne
2187:New Creek
1995:Cedar Run
1988:Broad Run
1825:Rocky Run
1791:Spout Run
1786:Windy Run
1245:Trout Run
754:pollutant
704:livestock
690:Pollution
668:Frederick
591:Geography
568:aqueducts
510:tributary
373:Discharge
329:Frederick
315:Discharge
232:Dickerson
111:Frederick
3670:Needwood
3569:Turville
3564:Tuckahoe
3434:Rock Run
3419:Pomonkey
3374:Octoraro
3354:Nanjemoy
3124:Dividing
3114:Deep Run
3069:Catoctin
3009:Big Pipe
2959:Antietam
2948:Creeks,
2934:Wye East
2924:Wicomico
2844:Pocomoke
2839:Patuxent
2834:Patapsco
2809:Monocacy
2774:Hawlings
2739:Choptank
2651:Pocomoke
2324:Mill Run
2242:Dans Run
1981:Bull Run
1726:Dead Run
1721:Rock Run
1127:Virginia
1117:Maryland
975:Archived
955:Archived
855:Archived
806:Archived
772:See also
762:nitrogen
731:bacteria
724:sediment
664:forested
605:Maryland
530:Maryland
520:via the
236:Maryland
151:Maryland
101:Maryland
82:Location
3726:Liberty
3645:Elkhorn
3514:Swanson
3469:Sellman
3399:Parsons
3324:Meekins
3264:Licking
3189:Georges
3184:Furnace
3169:Fishing
3144:Dueling
3104:Cuckold
3064:Carroll
2999:Bennett
2964:Alloway
2952:streams
2909:Warwick
2854:Potomac
2794:Manokin
2784:Magothy
2754:Corsica
2729:Chester
2714:Bohemia
2661:Tangier
2646:Newport
2641:Mallows
2631:Herring
2626:Fishing
2621:Eastern
2334:Big Run
1097:Islands
1092:Bridges
758:farming
750:erosion
708:dairies
603:at the
537:Shawnee
512:to the
114:Carroll
87:Country
74:Shawnee
44:in 2007
3721:Habeeb
3680:Roland
3559:Trappe
3449:Romney
3329:Middle
3304:Marley
3254:Israel
3219:Henson
3214:Harris
3159:Evitts
3149:Dundee
3109:Curtis
3014:Bodkin
2884:Severn
2879:Savage
2799:Middle
2671:Rivers
1077:system
970:USDA.
726:, and
700:runoff
601:Harney
558:. The
554:, the
524:. The
415:
376:
318:
295:Length
143:Harney
132:
129:Source
107:County
70:
3613:Lakes
3599:Wills
3504:Stony
3494:Sligo
3404:Piney
3379:Owens
3309:Marsh
3294:Lyons
3234:Honga
3204:Greys
3049:Budds
2950:runs,
2889:South
2859:Rhode
2824:North
2804:Miles
2764:Front
938:(PDF)
916:. MDE
895:. MDE
526:river
215:Mouth
97:State
3529:Toms
3464:Sams
3389:Oxon
3299:Main
3119:Deer
3054:Bush
2914:West
2719:Bush
2699:Bird
2694:Back
764:and
752:and
718:for
655:and
647:and
639:and
619:and
546:The
466:The
2929:Wye
2759:Elk
643:in
615:of
3768::
737:.
722:,
635:,
631:,
457:,
453:,
449:,
428:,
238:,
234:,
153:,
149:,
145:,
2581:e
2574:t
2567:v
2406:)
2402:(
1692:)
1688:(
1565:)
1561:(
1556:)
1552:(
1542:)
1538:(
1310:)
1304:(
1299:)
1295:(
1290:)
1286:(
1154:)
1150:(
1067:e
1060:t
1053:v
923:.
902:.
881:.
607:-
504:/
501:i
498:s
495:ə
492:k
489:ɒ
486:n
483:ˈ
480:ə
477:m
474:/
470:(
76:)
72:(
23:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
