307:
35:
448:
concrete arch bridge was constructed that carries Darby Road across Ithan Creek. A concrete slab bridge with a length of 27.9 feet (8.5 m) carries Clyde Road across the creek and was built that same year. Built in 1964, a 27.9 feet (8.5 m) prestressed box beam carries Bryn Mawr Avenue over Ithan Creek. Three years later, two concrete slab bridges were constructed to allow the
440:
released into Ithan Creek where, the company claimed, it posed no threat to human health. Despite this, on
December 4, 1905, the State Board of Health filed a lawsuit against the company alleging raw sewage was being illegally dumped into the creek. As a result, a judge sided with the Board of Health and a new plant was constructed.
447:
have been built across Ithan Creek. A concrete tee beam bridge with a length of 27.9 feet (8.5 m) carries Sproul Road over the creek and was built in 1922. A 25.9 feet (7.9 m) bridge of the same type was built in 1930 and carries
Conestoga Road over the creek. In 1932, a 40 feet (12 m)
459:
on
September 30, 2010. A majority of households surveyed after the storm reported flooding in their basements. As a result, several watershed drainage recommendations were proposed. On August 13, 2018, heavy rains damaged a culvert and some pipes along Ramsey Run, a tributary of Ithan Creek. Several
430:
On Ithan creek in Radnor, a mill seat, on land of the heirs of Andrew Steel, deceased. On Ithan creek, in Radnor, a grist-mill and saw-mill, head and fall about twenty-three feet, owned and occupied by John and David Evans. Near the head of Ithan creek, in Radnor, a grist mill and saw-mill, head and
254:
The creek was historically the site of several mills and has been subjected to numerous floods over the years. In 1902, a sewage company began dumping raw sewage into the creek, but this practice was stopped in 1905. The creek is in approved trout waters. It is the site of Ithan Valley Park, a small
547:
Ithan Valley Park is a 19-acre park that is adjacent to the creek. It contains a hiking trail and has fishing opportunities. The construction of a “Willowstreams corridor” trail is actively underway next to the creek that will connect
Haverford Reserve to Ithan Valley Park when completed. Radnor
439:
The Wayne
Sewerage Company was incorporated on December 1, 1902 and constructed and maintained sewers in Radnor township. It purchased an eleven-acre tract along the creek to build a sewer system and built an engine house with boilers to purify sewage. After it was purified, the water would be
956:
435:
On August 5, 1843, heavy rains caused massive flooding on Ithan Creek. About a quarter million dollars of damage in property was assessed, and several lives were lost. Bridges on Ithan Creek sustained a damage of about $ 475.
356:
Two soil associations exist in the Ithan Creek watershed. The
Neshaminy-Lehigh-Glenlg soil association is present in a small part of the watershed. It consists of silty, well drained, gravelly, and deep soil that rests on
425:
The village of Ithan along the creek was the first
European settlement in modern-day Radnor Township in the seventeenth century. In 1826, an official report stated the following about mills on the creek:
283:. It flows alongside the interstate for several tenths of a mile before passing under it again. Shortly thereafter, Ithan Creek enters Haverford Township, Pennsylvania and receives its largest tributary,
397:
from Sproul Road to Iven Avenue are not sized correctly to manage moderate floods. There are brick structures located alongside the creek that are in poor condition. Major roads in the watershed include
964:
588:
Watershed
Restoration Action Strategy (WRAS) State Water Plan Subbasin 03G Darby, Crum, Ridley, Chester and Cobbs Creeks Watersheds (Delaware River Estuary) Delaware, Chester and Philadelphia Counties
393:
of
Lansdowne. Ithan Creek's watershed has a diversity of land uses, including residential (high density and low density), transportation facilities, offices, college campuses, and historic sites. Its
431:
fall about sixteen feet, grinds from eight to ten thousand bushels of grain per annum, and about fifty tons gypsum per annum, saw-mill employed occasionally, owned and occupied by Jesse Brooke.
548:
Valley
Country Club is a golf course that borders the creek. Formerly crossing the creek, it was redesigned in 1968 to run north-south along the creek due to construction of Interstate 476.
460:
houses were flooded as Pennsylvania Route 320 become a flowing stream. A sink hole also opened next to the culvert. In May 2019, state government agencies repaired the culvert and pipes.
365:
bedrock. The Chester-Glenlg-Manor soil association is prevalent through the middle of the watershed. It consists of silty, channery, and shallow to deep soil that rests on brown
247:. The creek's watershed has an area of 7.39 square miles (19.1 km) and is highly developed. It has three named tributaries: Browns Run, Kirks Run, and
582:
271:. It flows west for several tenths of a mile before receiving its first tributary, Browns Run, from the right and turning south. The creek passes under
1142:
244:
1053:
353:
is exposed along the creek. According to a report by the Geological Society of Pennsylvania, the exposures are rare in the vicinity of Ithan Creek.
1152:
204:
240:
113:
1085:"Willowstreams is an ecologically significant 37-acre property with high quality native wetlands, meadow, and woodlands in Bryn Mawr, PA"
208:
646:
479:
The Ithan-Darby Creek Wetlands is listed on the Delaware County Natural Areas Inventory. It is a "notable significance" site. At the
1023:
819:
684:
419:
986:
1027:
996:
885:
Biographical and Historical Cyclopedia of Delaware County, Pennsylvania: Comprising a Historical Sketch of the County
860:
688:
586:
539:
are a concern. Most of the original forest cover has been removed to allow for farming and residential development.
616:
1147:
612:
386:
765:
503:
at this site, the main tree species include scattered black willow and silver maple. There are also patches of
333:
physiographic province. The Piedmont Uplands section has generally old, hard upland rocks that eroded from the
581:
345:
Era. The surficial geology mainly consist of felsic gneiss and mafic gneiss formations, with small amounts of
1059:
716:
History of Delaware County: From the Discovery of the Territory Included Within Its Limit to the Present Time
236:
456:
1114:
1063:
557:
292:
232:
279:
and crosses it once. After a short while, it receives Kirks Run from the right near the community of
714:
472:
have been recorded to naturally reproduce in the creek. On the banks of the stream, populations of
1109:
906:
407:
390:
280:
272:
883:
850:
449:
334:
655:
508:
239:, in the United States. It is approximately 4.2 miles (6.8 km) long and flows through
957:"Months later officials finally begin to move on failing pipes and culvert on Sproul Road"
789:
738:
8:
422:
on August 2, 1979. Its identifier in the Geographic Names Information System is 1177888.
268:
992:
856:
473:
385:
of Ithan Creek has an area of 7.39 square miles (19.1 km). Its source is in the
330:
536:
342:
825:
483:
at the confluence of Ithan Creek and Darby Creek, the main trees species include
284:
248:
212:
399:
382:
306:
276:
255:
park with hiking and fishing opportunities and the Radnor Valley Country Club.
180:
298:
Ithan Creek joins Darby Creek 17.9 miles (28.8 km) upriver of its mouth.
1136:
532:
504:
403:
373:
bedrock. Most of the watershed is considered to have slightly erodible soil.
275:
and receives two small unnamed tributaries from the left. It flows alongside
264:
128:
115:
528:
520:
488:
484:
362:
346:
323:
184:
931:
622:
469:
350:
338:
315:
86:
34:
1084:
1029:
A NATURAL HERITAGE INVENTORY OF DELAWARE COUNTY, PENNSYLVANIA June 2011
480:
288:
1022:
496:
319:
228:
852:
A History of Delaware County, Pennsylvania, and Its People, Volume 1
787:
524:
492:
394:
791:
Darby and Cobbs Creek Watershed Act 167 Stormwater Management Plan
763:
511:, which are surrounded by assorted wetland plants such as herbs,
500:
101:
Darby Creek in Haverford Township, Delaware County, Pennsylvania
683:
444:
370:
366:
358:
452:
to cross the creek, both being 29.9 feet (9.1 m) across.
1035:, pp. 9, 13, 15, 38, 42, 71–72, 91, 98, 173–174, 188–189
821:
Stormwater Management Survey of Radnor Township, Pennsylvania
516:
512:
611:
39:
A waterfall on Ithan Creek in Radnor Township, Pennsylvania
855:, Lewis Historical Publishing Company, pp. 269, 369,
535:
can sometimes be seen in the wetland, and a variety of
746:, Darby Creek Valley Association, pp. 76, 78, 80
788:
Delaware County Planning Department (January 2005),
389:
quadrangle of Valley Forge, but its mouth is in the
583:
Pennsylvania Department of Environmental Protection
848:
263:Ithan Creek rises in a small valley just south of
736:
1134:
881:
708:
706:
410:. Ithan Creek is not considered to be impaired.
817:
730:
654:, November 2, 2001, p. 86, archived from
67:Radnor Township, Delaware County, Pennsylvania
1107:
712:
703:
607:
605:
318:of Ithan Creek is 184 feet (56 m) above
1018:
1016:
1014:
954:
991:, Wilderness Adventures Press, p. 85,
924:
764:Geological Society of Pennsylvania (1885),
1110:"Blue Route Changes Face of Radnor Valley"
984:
602:
326:is 399 feet (122 m) above sea level.
1143:Tributaries of Darby Creek (Pennsylvania)
1011:
844:
842:
781:
337:. The rocks in the watershed date to the
310:Ithan Creek near its mouth at Darby Creek
888:, Gresham Publishing Company, p. 25
813:
811:
305:
301:
1153:Rivers of Delaware County, Pennsylvania
740:Darby Creek Watershed Conservation Plan
16:Stream in Delaware County, Pennsylvania
1135:
839:
690:Feature Detail Report for: Ithan Creek
679:
677:
675:
577:
575:
573:
455:The creek flooded substantially after
1024:Pennsylvania Natural Heritage Program
824:, pp. 14, 20, 21, archived from
808:
641:
639:
349:near the mouth of the creek. Silvery
468:The creek is approved trout waters.
685:Geographic Names Information System
672:
570:
420:Geographic Names Information System
166:7.39 sq mi (19.1 km)
13:
797:, pp. 32, 39, 47, 56, 71, 275
636:
14:
1164:
1108:Gomolka, Gene (August 12, 1972),
988:Flyfisher's Guide to Pennsylvania
818:Radnor Township (December 2010),
767:Report of Progress 1874-1889, A-Z
648:Pennsylvania Gazetteer of Streams
418:Ithan Creek was entered into the
585:Bureau of Watershed Management,
33:
1101:
1077:
1046:
978:
948:
907:"Wayne Sewerage Company's Suit"
899:
875:
613:United States Geological Survey
387:United States Geological Survey
322:. The elevation of the creek's
913:, p. 5, December 11, 1911
757:
291:and meets its confluence with
107: • coordinates
1:
1060:Radnor Township, Pennsylvania
955:Stein, Linda (May 28, 2019),
563:
542:
237:Delaware County, Pennsylvania
45:Physical characteristics
376:
146: • elevation
73: • elevation
7:
1115:Delaware County Daily Times
849:Jordan, John Woolf (1914),
719:, H.B. Ashmead, p. 404
558:List of Pennsylvania rivers
551:
97: • location
63: • location
10:
1169:
737:Cahill Associates (2002),
463:
413:
329:Ithan Creek is within the
882:Wiley, Samuel T. (1894),
258:
198:
190:
175:
170:
162:
158:4.2 mi (6.8 km)
154:
144:
105:
95:
85:
81:
71:
61:
53:
49:
44:
32:
23:
200: • right
77:399 ft (122 m)
618:The National Map Viewer
591:, pp. 1–2, 6–8, 10
314:The elevation near the
150:184 ft (56 m)
1148:Rivers of Pennsylvania
713:Smith, George (1862),
433:
408:Pennsylvania Route 320
311:
281:Rosemont, Pennsylvania
273:Pennsylvania Route 320
661:on September 17, 2015
457:Tropical Storm Nicole
450:Mid-County Expressway
428:
335:Appalachian Mountains
309:
302:Geography and geology
129:39.99698°N 75.35010°W
961:Main Line Media News
267:in the community of
985:Wolf, Dave (2007),
269:Wayne, Pennsylvania
171:Basin features
134:39.99698; -75.35010
125: /
476:are overabundant.
312:
287:. It passes under
245:Haverford Township
1055:Ithan Valley Park
932:"Delaware County"
625:on March 29, 2012
474:white-tailed deer
218:
217:
1160:
1127:
1126:
1125:
1123:
1105:
1099:
1098:
1097:
1095:
1081:
1075:
1074:
1073:
1071:
1062:, archived from
1050:
1044:
1043:
1042:
1040:
1034:
1020:
1009:
1008:
1007:
1005:
982:
976:
975:
974:
972:
963:, archived from
952:
946:
945:
944:
942:
928:
922:
921:
920:
918:
903:
897:
896:
895:
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871:
869:
846:
837:
836:
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833:
815:
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728:
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710:
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699:
697:
681:
670:
669:
668:
666:
660:
653:
643:
634:
633:
632:
630:
621:, archived from
609:
600:
599:
598:
596:
579:
537:invasive species
331:Piedmont Uplands
201:
140:
139:
137:
136:
135:
130:
126:
123:
122:
121:
118:
74:
64:
37:
21:
20:
1168:
1167:
1163:
1162:
1161:
1159:
1158:
1157:
1133:
1132:
1131:
1130:
1121:
1119:
1106:
1102:
1093:
1091:
1083:
1082:
1078:
1069:
1067:
1066:on May 18, 2015
1052:
1051:
1047:
1038:
1036:
1032:
1021:
1012:
1003:
1001:
999:
983:
979:
970:
968:
967:on May 30, 2019
953:
949:
940:
938:
936:Uglybridges.com
930:
929:
925:
916:
914:
905:
904:
900:
891:
889:
880:
876:
867:
865:
863:
847:
840:
831:
829:
828:on May 18, 2015
816:
809:
800:
798:
794:
786:
782:
773:
771:
762:
758:
749:
747:
743:
735:
731:
722:
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704:
695:
693:
682:
673:
664:
662:
658:
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637:
628:
626:
610:
603:
594:
592:
580:
571:
566:
554:
545:
466:
416:
379:
343:Lower Paleozoic
304:
285:Meadowbrook Run
261:
249:Meadowbrook Run
241:Radnor Township
223:(also known as
213:Meadowbrook Run
199:
147:
133:
131:
127:
124:
119:
116:
114:
112:
111:
108:
98:
72:
62:
40:
28:
25:
17:
12:
11:
5:
1166:
1156:
1155:
1150:
1145:
1129:
1128:
1100:
1076:
1045:
1010:
997:
977:
947:
923:
898:
874:
861:
838:
807:
780:
756:
729:
702:
671:
635:
601:
568:
567:
565:
562:
561:
560:
553:
550:
544:
541:
519:, and rushes.
465:
462:
415:
412:
400:Interstate 476
378:
375:
303:
300:
277:Interstate 476
260:
257:
216:
215:
202:
196:
195:
192:
188:
187:
181:Delaware River
179:Darby Creek →
177:
173:
172:
168:
167:
164:
160:
159:
156:
152:
151:
148:
145:
142:
141:
109:
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58:
55:
51:
50:
47:
46:
42:
41:
38:
30:
29:
26:
15:
9:
6:
4:
3:
2:
1165:
1154:
1151:
1149:
1146:
1144:
1141:
1140:
1138:
1117:
1116:
1111:
1104:
1090:
1089:Willowstreams
1086:
1080:
1065:
1061:
1057:
1056:
1049:
1031:
1030:
1026:(June 2011),
1025:
1019:
1017:
1015:
1000:
998:9781932098518
994:
990:
989:
981:
966:
962:
958:
951:
937:
933:
927:
912:
911:Chester Times
908:
902:
887:
886:
878:
864:
862:9785876569028
858:
854:
853:
845:
843:
827:
823:
822:
814:
812:
793:
792:
784:
769:
768:
760:
742:
741:
733:
718:
717:
709:
707:
692:
691:
686:
680:
678:
676:
657:
650:
649:
642:
640:
624:
620:
619:
614:
608:
606:
590:
589:
584:
578:
576:
574:
569:
559:
556:
555:
549:
540:
538:
534:
533:mountain mint
530:
526:
522:
518:
514:
510:
506:
505:silky dogwood
502:
498:
494:
490:
486:
482:
477:
475:
471:
461:
458:
453:
451:
446:
441:
437:
432:
427:
423:
421:
411:
409:
405:
404:U.S. Route 30
401:
396:
392:
388:
384:
374:
372:
368:
364:
360:
354:
352:
348:
344:
340:
336:
332:
327:
325:
321:
317:
308:
299:
296:
294:
290:
286:
282:
278:
274:
270:
266:
265:U.S. Route 30
256:
252:
250:
246:
242:
238:
234:
230:
226:
222:
214:
210:
206:
203:
197:
193:
189:
186:
182:
178:
174:
169:
165:
161:
157:
153:
149:
143:
138:
110:
104:
100:
94:
90:
88:
84:
80:
76:
70:
66:
60:
56:
52:
48:
43:
36:
31:
22:
19:
1120:, retrieved
1118:, p. 14
1113:
1103:
1092:, retrieved
1088:
1079:
1068:, retrieved
1064:the original
1054:
1048:
1037:, retrieved
1028:
1002:, retrieved
987:
980:
969:, retrieved
965:the original
960:
950:
939:, retrieved
935:
926:
915:, retrieved
910:
901:
890:, retrieved
884:
877:
866:, retrieved
851:
830:, retrieved
826:the original
820:
801:December 24,
799:, retrieved
790:
783:
772:, retrieved
770:, p. 27
766:
759:
748:, retrieved
739:
732:
721:, retrieved
715:
694:, retrieved
689:
663:, retrieved
656:the original
647:
627:, retrieved
623:the original
617:
593:, retrieved
587:
546:
529:joe-pye weed
521:Monkeyflower
489:black willow
485:silver maple
478:
467:
454:
442:
438:
434:
429:
424:
417:
380:
363:granodiorite
355:
347:serpentinite
328:
313:
297:
262:
253:
224:
220:
219:
185:Delaware Bay
18:
1004:December 9,
470:Brown trout
351:mica schist
339:Precambrian
293:Darby Creek
233:Darby Creek
221:Ithan Creek
191:Tributaries
176:Progression
132: /
24:Ithan Creek
1137:Categories
564:References
543:Recreation
481:floodplain
391:quadrangle
289:Darby Road
205:Browns Run
163:Basin size
120:75°21′00″W
117:39°59′49″N
1039:April 24,
723:April 28,
595:April 24,
509:wild rose
499:. In the
497:red maple
383:watershed
377:Watershed
320:sea level
229:tributary
225:Ithan Run
209:Kirks Run
27:Ithan Run
1122:July 28,
1094:April 5,
971:April 5,
917:July 29,
868:July 28,
774:July 29,
552:See also
525:ironweed
501:wetlands
493:boxelder
443:Several
395:culverts
341:Era and
941:May 11,
892:May 20,
513:grasses
464:Biology
445:bridges
414:History
227:) is a
1070:May 6,
995:
859:
832:May 7,
750:May 6,
696:May 6,
665:May 8,
629:May 8,
531:, and
517:sedges
495:, and
406:, and
371:gneiss
367:schist
359:gabbro
324:source
259:Course
194:
155:Length
91:
57:
54:Source
1033:(PDF)
795:(PDF)
744:(PDF)
659:(PDF)
652:(PDF)
316:mouth
87:Mouth
1124:2015
1096:2020
1072:2015
1041:2015
1006:2013
993:ISBN
973:2020
943:2015
919:2015
894:2015
870:2015
857:ISBN
834:2015
803:2013
776:2015
752:2015
725:2015
698:2015
667:2015
631:2015
597:2015
507:and
381:The
369:and
361:and
243:and
235:in
231:of
1139::
1112:,
1087:,
1058:,
1013:^
959:,
934:,
909:,
841:^
810:^
705:^
687:,
674:^
638:^
615:,
604:^
572:^
527:,
523:,
515:,
491:,
487:,
402:,
295:.
251:.
211:,
207:,
183:→
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
