Station Descriptions Susquehanna River at Towanda, Pa. Purpose: To determine load, yield and trend of nutrients and sediment coming to Pennsylvania from New York. Although the watershed represented by the station at Towanda, Pa. contains portions of Pennsylvania, 80 percent of the watershed lies within New York. Station Id: 01531500 Period of record: 10/88 to present. Drainage Area: 7,797 sq.mi. Gage datum: 694.38 ft Station Lat/Long: 41 47'27"/76 26'40" Gage Lat/Long: 41 45' 55"/76 26'28" Location: The sampling location is on the James Street bridge just north of the GTE Industrial Plant. The stream gage is located on the west bank of the Susquehanna River at the end of Bridge Street in Towanda, Pa. Susquehanna River at Danville, Pa. Purpose: To determine load, yield and trend of nutrients and sediment of the Susquehanna River before the confluence with the West Branch Susquehanna River. The station at Danville also represents the additional drainage area in northern Pennsylvania between Danville and Towanda, Pa. Station Id: 01540500 Period of record: 10/84 to present. Drainage Area: 11,220 sq.mi. Gage datum: 431.29 ft Station Lat/Long: 40 57'29"/76 37'10" Gage Lat/Long: 40 57'29"/76 37'10" Location: The sampling location is on the Mill Street bridge with the gage located on the west bank, 200 feet upstream of Mill Street bridge. West Branch Susquehanna River at Lewisburg, Pa. Purpose: To determine load, yield and trend of nutrients and sediment from a major tributary of a primarily forested watershed to the Susquehanna River. The West Branch Subbasin is a very large watershed containing past and present coal mining areas and population centers generally located along the river valley. Station Id: 01553500 Period of record: 10/84 to present. Drainage Area: 6,847 sq.mi. Gage datum: 428.20 ft Station Lat/Long: 40 58'05"/76 52'25" Gage Lat/Long: 40 58'05"/76 52'25" Location: The sampling location is on the Market Street bridge with the gage located on the east bank next to the Market Street bridge abutment on the dowstream side. Juniata River at Newport, Pa. Purpose: To determine load, yield and trend of nutrients and sediment of Juniata River which is a major tributary to the Susquehanna River draining the west-central area of the Susquehanna River Basin. Station Id: 01567000 Period of record: 10/84 - 12/89 10/93 to Present Drainage Area: 3,354 sq.mi. Gage datum: 363.93 ft Station Lat/Long: 40 28'44"/77 07'42" Gage Lat/Long: 40 28'42"/77 07'46" Location:. The sampling location is on the Route 34 bridge with the gage located on the west bank next to the Route 34 bridge on the dowstream side Sherman Creek at Shermans Dale, Pa. Purpose: To determine load and yield of nutrients and sediment in a watershed located in the Lower Susquehanna River basin that represents a sparsely populated, mixed forest/cropland watershed with no areas of concentrated residential development. Station Id: 01568000 Period of record: 10/84 - 12/89 Drainage Area: 200 sq.mi. Gage datum: 422.63 ft Station Lat/Long: 40 19'22"/ 77 10'09" Gage Lat/Long: 40 19'24"/ 77 10'09" Location: The sampling location is on the Route 34 bridge at Shermans Dale with the gage located on the north bank next to the Route 34 bridge on the dowstream side Stony Creek at Water Tank Trail near Dauphin, Pa. Purpose: To determine load and yield of nutrients and sediment in a watershed located in the Lower Susquehanna River basin that represents a completely forested wilderness area. Station Id: 01568750 Period of record: 10/84 - 11/86 Drainage Area: 21.9 sq.mi. Gage datum: 560 ft Station Lat/Long: 40 24'51"/76 46'50" Gage Lat/Long: 40 24'51"/76 46'50" Location: The sampling location on Stony Creek is next to the gage which was located on the north bank at Water Tank Trail and nine miles northeast of Dauphin, Pa. The gage was discontinued and removed. Susquehanna River at Harrisburg, Pa. Purpose: To determine load and yield of nutrients and sediment on the main stem Susquehanna River upstream of major impoundments in the Lower Susquehanna River. Station Id: 01570500 Period of record: 10/84 - 12/89 Drainage Area: 24, 100 sq.mi. Gage datum: 290.01 ft Station Lat/Long: 40 15'19"/ 76 53'11" Gage Lat/Long: 40 15'17"/ 76 53'11" Location: The sampling location is along the Walnut Street walking bridge with the gage located on the east bank of City Island, 60 ft downstream of the Market Street bridge in Harrisburg, Pa. Paxton Creek near Penbrook, Pa. Purpose: To determine load and yield of nutrients and sediment of a small watershed of intense suburban development throughout its headwaters. Station Id: 01571000 Period of record: 10/84 - 12/88 10/91 - 9/95 Drainage Area: 11.2 sq.mi. Gage datum: 350 ft Station Lat/Long: 40 18'30"/ 76 51'00" Gage Lat/Long: 40 18'30"/ 76 51'00" Location: Station and gage are located on the right bank, 90 feet upstream of North Progress Avenue bridge. Swatara Creek near Hershey, Pa. Purpose: To determine load and yields of nutrients and sediment from a major tributary to the main stem Susquehanna River. Station Id: 01573560 Period of record: 10/84 - 12/89 Drainage Area: 483 sq.mi. Gage datum: 325.94 ft Station Lat/Long: 40 17'12"/76 40'47" Gage Lat/Long: 40 17'54"/ 76 40'05" Location: Station is located at a bridge 0.7 downstream of Route 39 bridge and approximately 100 feet upstream of the confluence of Spring Creek and Swatara Creek. bridge near Union Deposit. Gage is located on east bank, 0.5 miles upstream of Route 39 bridge. West Conewago Creek near Manchester, Pa. Purpose: Purpose: To determine load and yields of nutrients and sediment from a major tributary to the main stem Susquehanna River. Station Id: 01574000 Period of record: 10/84 - 12/89 Drainage Area: 510 sq.mi. Gage datum: 263.68 ft Station Lat/Long: 40 04'52"/76 43'05" Gage Lat/Long: 40 04'56"/ 76 43'13" Location:.Station is located at the Route 181 bridge and gage is located north bank 500 feet upstream of Route 181 bridge. Codorus Creek near York, Pa. Purpose: To determine load and yield of nutrients and sediment of a complex watershed that drains extensive cropland with a number of fairly large reserviors. Station Id: 01575500 Period of record: 10/84 - 12/89 Drainage Area: 222 sq.mi. Gage datum: 356.39 ft Station Lat/Long: 39 56'57"/76 44'47" Gage Lat/Long: 39 56'46"/ 76 45'20" Location:. Sample location is at Richland Avenue bridge. Gage is on north bank, 0.5 miles upstream of Richland Avenue bridge. Codorus Creek near Pleasureville, Pa. Purpose: To determine load and yield of nutrients and sediment of a watershed with suburban and urban devlopment. Station Id: 01575585 Period of record: 10/84 - 12/89 Drainage Area: 267 sq.mi. Gage datum: 330 ft Station Lat/Long: 40 01'08"/ 76 41'36" Gage Lat/Long: 40 01'07"/ 76 41'36" Location: Sample location is at the Sherman Street bridge near the Pleasureville waste water treatment plant. The gage was on the south bank on the downstream side of the Sherman Street bridge. This gage was discontinued and removed. Susquehanna River at Marietta, Pa.. Purpose: To determine load, yield, and trend of nutrients and sediment of the Susquehanna River Basin before entering a series of reservoirs on the lower reach of the Susquehanna River. Station Id: 01576000 Period of record: 10/86 - Present Drainage Area: 25, 990sq.mi. Gage datum: 200.56 ft Station Lat/Long: 40 02'08"/76 31'52" Gage Lat/Long: 40 03'16"/ 76 31'52" Location: Sample location is along the Route 30 bridge. The gage is located on the east bank upstream of the Route 30 bridge and 1 mile downstream of Marietta, Pa. Conestoga River at Conestoga, Pa. Purpose: To determine load, yield, and trend of nutrients and sediment of a watershed with intense agricultural activity and increasing suburban development. Station Id: 01576754 Period of record: 10/84 - Present Drainage Area: 470 sq.mi. Gage datum: 195 ft Station Lat/Long: 39 56'47"/ 76 22'05" Gage Lat/Long: 39 56'47"/ 76 22'05" Location:.Station and gage are located on south bank, 2.6 miles up from the mouth of the Conestoga River and 1,500 ft downstream of the Little Conestoga Creek.