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Updating Pennsylvania Streamgage Datums

Notification of Intent to Update Streamgage Datums

USGS is updating streamgage datums to reflect elevations in North American Vertical Datum of 1988 (NAVD88).  

blue sky above curved aggregate dam with water surface, trees, and grass
Survey equipment at Raystown Dam near Huntingdon, Pennsylvania. USGS measures datum (elevation) information as part of monitoring lake level as well as streamflow and stage below the dam. (Victor Cortes, USGS)

The USGS Pennsylvania Water Science Center (PaWSC) will be converting the geodetic vertical elevations for our network of streamgages to the current datum of North American Vertical Datum of 1988 (NAVD88). Prior to a change in geodetic vertical elevation (gage datum) at a streamgage, USGS will provide a 90-day notification to users of the data.

Current and accurate geodetic vertical elevations provide a universally based datum that benefits Federal, State, and local agencies, along with engineers, academics, and others that use water-level information. These updates are also part of preparations for a future transition to the North American-Pacific Geopotential Datum of 2022 (NAPGD2022).

This update in geodetic vertical datum does not affect the location of the streamgage, nor the observed local gage height (stage) or discharge recorded at the streamgage. 

A list of streamgages with previous and upcoming datum changes can be found below. This table will be updated as additional datum changes are finalized.

For more information on the streamgage datum conversion process, contact Marla Stuckey (mstuckey@usgs.gov).

 

USGS PaWSC Datum Conversion Table

Last updated 9/6/2023

[ft, feet; NAVD88, North American Vertical Datum of 1988; NGVD29, National Geodetic Vertical Datum of 1929; *, Different datum elevations were reported depending on the source]

Station Number Station Name Old
Datum Elevation
(ft)
Old Datum New
Datum
Elevation (NAVD88)
(ft)
Datum
Update
Date
01429000 West Branch
Lackawaxen River at
Prompton, PA
1083.78 NGVD29 1083.14 12/5/2023
01429500 Dyberry Creek near
Honesdale, PA
970.7 NGVD29 970.07 12/5/2023
01430000 Lackawaxen River near
Honesdale, PA
946.34 NGVD29 945.73 12/5/2023
01438300 Vandermark Creek at
Milford, PA
490.5 NGVD29 489.88 12/5/2023
01440300 Mill Creek at
Mountainhome, PA
1095.44 NGVD29 1094.86 12/5/2023
01469500 Little Schuylkill River
at Tamaqua, PA
817.48 NGVD29 816.82 12/5/2023
01518000 Tioga River at
Tioga, PA
1021.07 NGVD29 1020.59 12/5/2023
01518420 Crooked Cr bl
Catlin Hollow at
Middlebury Center
1100 NGVD29 1099.56 12/5/2023
01519200 Cowanesque River at
Elkland, PA
1100 NGVD29 1099.52 12/5/2023
01534500 Lackawanna River at
Archbald, PA
889.33 NGVD29 888.66 12/5/2023
01543700 First Fork
Sinnemahoning Creek at
Wharton, PA
1070 NGVD29 1062.15 12/5/2023
01544000 First Fork
Sinnemahoning Cr near
Sinnemahoning, PA
878.71 NGVD29 878.18 12/5/2023
01545800 WB Susquehanna River
at Lock Haven, PA
534.51 NAVD88 534.52 12/5/2023
01548500 Pine Creek at
Cedar Run, PA
780.36 NGVD29 779.80 12/5/2023
01549760 WB Susquehanna River
at Jersey Shore, PA
513.19 NGVD29 512.54 12/5/2023
01551500 WB Susquehanna River
at Williamsport, PA
494.98 NGVD29 494.27 12/5/2023
01553240 W Br Susquehanna
River at West Milton, PA
*434 / 460 NGVD29 433.26 12/5/2023
01553500 West Branch
Susquehanna River at
Lewisburg, PA
428.2 NGVD29 427.45 12/5/2023
03039036 Allegheny River
below Lock & Dam 6
at Clinton, PA
*760 / 748 NGVD29 747.4 12/5/2023
03039040 Allegheny River
at Lock & Dam 5
near Freeport, PA
748 NGVD29 747.5 12/5/2023
03039041 Allegheny River
bl Lock & Dam 5
near Freeport, PA
*740 / 736.4 NGVD29 735.9 12/5/2023
03041029 Conemaugh River at
Minersville, PA
1140 NGVD29 1130.9 12/5/2023
03041500 Conemaugh River at
Seward, PA
1076.01 NGVD29 1075.6 12/5/2023
03042000 Blacklick Creek at
Josephine, PA
954.46 NAVD88 964.2 12/5/2023
03042280 Yellow Creek near
Homer City, PA
1140 NGVD29 1136.9 12/5/2023
03042500 Two Lick Creek at
Graceton, PA
981.63 NGVD29 980.8 12/5/2023
03044000 Conemaugh River at
Tunnelton, PA
844.64 NGVD29 844.3 12/5/2023
03044810 Linn Run at
Linn Run State Park
near Rector, PA
1550 NGVD29 1545.4 12/5/2023
03045000 Loyalhanna Creek at
Kingston, PA
1013.16 NGVD29 1012.8 12/5/2023
03045010 Loyalhanna Creek at
Latrobe, PA
*962 / 1000 NGVD29 953.5 12/5/2023
03047000 Loyalhanna Creek at
Loyalhanna Dam, PA
889.38 NGVD29 870.2 12/5/2023
03048500 Kiskiminetas River at
Vandergrift, PA
769.4 NGVD29 769.1 12/5/2023
03048900 Buffalo Creek at
Iron Bridge, PA
825 NAVD88 820.1 12/5/2023
03049500 Allegheny River at
Natrona, PA
736.36 NGVD29 735.8 12/5/2023
03049501 Allegheny River
(lower pool) at
Natrona, PA
725.8   725.3 12/5/2023
03049640 Allegheny R at
CW Bill Young L&D
at Acmetonia, PA
*725.8 / 740 NGVD29 725.2 12/5/2023
03049641 Allegheny R at
CW Bill Young (lower)
Acmetonia, PA
712   711.4 12/5/2023
03049680 Allegheny R at
Lock & Dam 2 at
Aspinwall, PA
712 NGVD29 711.5 12/5/2023
03049681 Allegheny R at
L&D 2 (lower pool)
at Aspinwall, PA
694.2   693.6 12/5/2023
03049800 Little Pine Creek
near Etna, PA
774.26 NGVD29 774 12/5/2023
03049807 Pine Creek at
Grant Avenue at
Etna, PA
740 NGVD29 727 12/5/2023
03049819 Girtys Run above
Grant Avenue at
Millvale, PA
720 NGVD29 716.8 12/5/2023
03062998 Monongahela R
L&D8 (Upper Pool) @
Point Marion, PA
*788 / 790 NGVD29 787.6 12/5/2023
03063000 Monongahela R
L&D8 (Lower Pool) @
Point Marion, PA
*769 / 782.5 NGVD29 768.6 12/5/2023
03072000 Dunkard Creek at
Shannopin, PA
806.25 NGVD29 808.8 12/5/2023
03072655 Monongahela River
near Masontown, PA
769 NGVD29 768.5 12/5/2023
03072656 Monongahela River
(lower pool) near
Masontown, PA
754 NGVD29 753.5 12/5/2023
03073000 South Fork Tenmile
Creek at Jefferson, PA
850 NGVD29 849.7 12/5/2023
03073750 Monongahela R at
Maxwell L&D Upper
Pool @ Maxwell
754 *NGVD29/NAVD88 753.5 12/5/2023
03073751 Monongahela R @
Maxwell L&D (lower
pool) @ Maxwell
734.5 NGVD29 734.1 12/5/2023
03074500 Redstone Creek at
Waltersburg, PA
882.28 NGVD29 881.9 12/5/2023
03074850 Pike Run at |
Granville, PA
750 NGVD29 763.2 12/5/2023
03074998 Monongahela R at
L&D4 Upper Pool at
Charleroi, PA
*717.9 / 734.5 *NGVD29/NAVD88 733.9 12/5/2023
03075000 Monongahela River at
Charleroi, PA
*717.9 / 735.33 NGVD29 717.1 12/5/2023
03075070 Monongahela River at
Elizabeth, PA
717.9 NGVD29 717.3 12/5/2023
03075071 Monongahela River below
Lock & Dam 3 at Elizabeth
*709.7 / 730 NGVD29 709.2 12/5/2023
03077500 Youghiogheny River at Youghiogheny River Dam, PA 1310.17 NGVD29 1309.7 12/5/2023
03079000 Casselman River at
Markleton, PA
1655.29 NGVD29 1654.8 12/5/2023
03080000 Laurel Hill Creek at
Ursina, PA
1335.26 NGVD29 1334.3 12/5/2023
03081000 Youghiogheny River
below Confluence, PA
1302.77 NGVD29 1302.3 12/5/2023
03081500 Youghiogheny River at
Ohiopyle, PA
1164.67 NAVD88 1164.2 12/5/2023
03082500 Youghiogheny River at
Connellsville, PA
860.13 NGVD29 861.6 12/5/2023
03083500 Youghiogheny River at
Sutersville, PA
733.36 NGVD29 732.9 12/5/2023
03084698 Turtle Creek at
Wilmerding, PA
*696.23 / 726.79 NAVD88 726.3 12/5/2023
03084800 Thompson Run at
Turtle Creek, PA
750 NGVD29 729.8 12/5/2023
03085000 Monongahela River at
Braddock, PA
709.66 NGVD29 709.2 12/5/2023
03085002 Monongahela R at
L&D2 Lower Pool at
Braddock, PA
694.2 NGVD29 693.6 12/5/2023
03085152 Monongahela R at
Point State Park at
Pittsburgh
694.23 NGVD29 693.6 12/5/2023
03085213 Sawmill Run at
Duquesne Heights nr
Pittsburgh, PA
*790 / 860 NGVD29 742.4 12/5/2023
03085250 Chartiers Creek at
Canonsburg, PA
940 NGVD29 915 12/5/2023
03085500 Chartiers Creek at
Carnegie, PA
755.45 NGVD29 754.9 12/5/2023
03085730 Ohio River at
Emsworth Dam Upper
Pool @ Emsworth
694 NGVD29 693.38 12/5/2023
03085734 Ohio River at
Emsworth Dam Lower
Pool @ Emsworth
680 NGVD29 679.5 12/5/2023
03086000 Ohio River at
Sewickley, PA
680 NGVD29 679.6 12/5/2023
03086001 Ohio River (lower pool)
at Sewickley, PA
670.4 NGVD29 669.8 12/5/2023
03099600 Mahoning River at
North Edinburg, PA
770 NGVD29 778.6 12/5/2023
03101500 Shenango River at
Pymatuning Dam, PA
970 NGVD29 969.4 12/5/2023
03102500 Little Shenango River
at Greenville, PA
953.46 NGVD29 952.4 12/5/2023
03102850 Shenango River near
Transfer, PA
913.94 NGVD29 912.4 12/5/2023
03103500 Shenango River at
Sharpsville, PA
861.57 NGVD29 860.7 12/5/2023
03104490 Shenango River near
West New Castle, PA
*786.12 / 802 *NGVD29/NAVD88 785.9 12/5/2023
03104500 Shenango River at
New Castle, PA
790 NGVD29 784.8 12/5/2023
03105500 Beaver River at
Wampum, PA
736.24 NGVD29 735.8 12/5/2023
03105810 Connoquenessing Creek
at Renfrew, PA
920 NGVD29 951.9 12/5/2023
03105940 Little Connoquenessing
Creek at Harmony, PA
910 NGVD29 908 12/5/2023
03106000 Connoquenessing Creek
near Zelienople, PA
*850 / 852.31 NGVD29 851.8 12/5/2023
03106300 Muddy Creek near
Portersville, PA
1160.91 NGVD29 1153.9 12/5/2023
03106500 Slippery Rock Creek at
Wurtemburg, PA
832.06 NGVD29 831.6 12/5/2023
03107500 Beaver River at
Beaver Falls, PA
727.48 NGVD29 727 12/5/2023
03108000 Raccoon Creek at
Moffatts Mill, PA
719.16 NGVD29 718.8 12/5/2023
03108490 Ohio R ab
Montgomery Dam &
Locks at Ohioview, PA
670.2 NGVD29 669.7 12/5/2023
03108500 Ohio River at
Montgomery Lock &
Dam, Lower Pool
*652.5 / 653.6 NGVD29 652.2 12/5/2023
04212945 Conneaut Creek at
Cherry Hill, PA
780 NGVD29 790.8 12/5/2023
04213075 Brandy Run near
Girard, PA
800 NGVD29 736.9 12/5/2023
04213152 Walnut Creek
Upstream Pool,
near Erie, PA
600 NGVD29 572.1 12/5/2023
04213200 Mill Creek at
Erie, PA
740 NGVD29 761.5 12/5/2023
03021890

French Creek at
Cambridge Springs, PA

1126 NAVD88 1123.61 11/1/2023
03034000 Mahoning Creek at
Punxsutawney, PA
1206.14 NGVD29 1205.5 11/1/2023

03034500

Little Mahoning Creek at
McCormick, PA
1164.88 NGVD29 1163.9 11/1/2023
03036000 Mahoning Creek at
Mahoning Creek Dam, PA
1003.39 NGVD29 1002.2 11/1/2023
03036150 Allegheny River at
Lock & Dam 8 nr
Templeton, PA
791.2 NGVD29 790.5 11/1/2023
03036151 Allegheny R at
L&D 8 (lower pool) nr
Templeton, PA
773.1 NGVD29 772.8 11/1/2023
03036500 Allegheny River at
Kittanning, PA
773.4 NGVD29 772.8 11/1/2023
03036501 Allegheny River
(lower pool) at
Kittanning, PA
760.4 NGVD29 759.7 11/1/2023
03036995 Crooked Creek above
McKee Run at
Creekside, PA
1030 NGVD29 1016.8 11/1/2023
03038000 Crooked Creek at
Idaho, PA
961.04 NGVD29 960.7 11/1/2023
03039000 Crooked Creek at
Crooked Creek Dam
near Ford City
799.51 NGVD29 798.0 11/1/2023
03039035 Allegheny River at
Lock & Dam 6 at
Clinton, PA
760.4 NGVD29 759.8 11/1/2023
01428750 West Branch
Lackawaxen River
near Aldenville, PA
1244.6 NGVD29  1244.00 10/1/2023
01516350 Tioga River near
Mansfield, PA
1121.28 NGVD29 1120.80 10/1/2023
01518700 Tioga River at
Tioga Junction, PA
990.43 NGVD29 987.62 10/1/2023
01520000 Cowanesque River
near Lawrenceville, PA
983.96 NGVD29    983.6 10/1/2023
01534000 Tunkhannock Creek
near Tunkhannock, PA
610.1 NGVD29  609.44 10/1/2023
01536000 Lackawanna River at
Old Forge, PA
595.26 NGVD29     594.6 10/1/2023
01538700 Susquehanna River
at Bloomsburg, PA
    450.64 10/1/2023
01540500 Susquehanna River
at Danville, PA
431.29 NGVD29  430.54 10/1/2023
01542500 WB Susquehanna River
at Karthaus, PA
830.59 NGVD29 830.06 10/1/2023
01543500 Sinnemahoning Creek
at Sinnemahoning, PA
769.36 NGVD29 768.79 10/1/2023
01545500 West Branch
Susquehanna River
at Renovo, PA
634.19 NGVD29 633.59 10/1/2023
01459500 Tohickon Creek near
Pipersville, PA
258.96 NGVD29 258.12 9/1/2023
01468500 Schuylkill River at
Landingville, PA
470.64 NGVD29 469.97 9/1/2023
01472620 East Branch
Perkiomen Creek
near Dublin, PA
338.14 NGVD29 337.21 9/1/2023
01541200 WB Susquehanna River
near Curwensville, PA
1124.66 NGVD29 1124.11 9/1/2023
01541303 West Branch
Susquehanna River
at Hyde, PA
1093.9 NGVD29 1093.35 9/1/2023
01541500 Clearfield Creek at
Dimeling, PA
1146.08 NGVD29 1145.56 9/1/2023
01546400 Spring Creek at
Houserville, PA
926.63 NGVD29 925.96 9/1/2023
01546500 Spring Creek near
Axemann, PA
788.81 NGVD29 788.14 9/1/2023
01547200 Bald Eagle Creek
bl Spring Creek at
Milesburg, PA
682.49 NGVD29 681.83 9/1/2023
01547500 Bald Eagle Creek at
Blanchard, PA
579.79 NGVD29 579.08 9/1/2023
01547950 Beech Creek at
Monument, PA
741.6 NGVD29 741.04 9/1/2023
01548005 Bald Eagle Creek near
Beech Creek Station, PA
560 NGVD29 559.25 9/1/2023
01548085 Bald Eagle Creek at
Castanea, PA
520.75 NGVD29 520.10 9/1/2023
01555000 Penns Creek at
Penns Creek, PA
507.38 NGVD29 506.64 9/1/2023
01555500 East Mahantango Creek
near Dalmatia, PA
401.22 NGVD29 400.47 9/1/2023
01453000 Lehigh River at
Bethlehem, PA
210.94 NGVD29 210.26 8/1/2023
01449800 Pohopoco Cr bl
Beltzville Dam nr
Parryville, PA
492.05 NGVD29 491.4 11/2022, 4/18/2023
01449000 Lehigh River at
Lehighton, PA
444.26 NGVD29 445.17 4/25/2022, 4/18/2023
01432055

Lackawaxen River
near Baoba, PA

776 NAVD88 769.8 7/1/2023
01439500 Bush Kill at
Shoemakers, PA
421.13 NGVD29 420.4 7/1/2023
03020000 Tionesta Creek at
Tionesta Creek Dam, PA
1043.43 NGVD29 1043.0 4/1/2023
03020500 Oil Creek at
Rouseville, PA
1028.32 NGVD29 1027.9 4/1/2023
03022540 Woodcock Creek at
Blooming Valley, PA
1200 NGVD29 1196.6 4/1/2023
03024000 French Creek
at Utica, PA
1019.44 NGVD29 1018.8 4/1/2023
03025000 Sugar Creek at
Sugarcreek, PA
1013.03 NGVD29 1010.1 4/1/2023
03026500 Sevenmile Run
near Basselas, PA
1690.73 NGVD29 1690.6 4/1/2023
03027500 EB Clarion River at
EB Clarion River Dam, PA
1517.58 NGVD29 1517.3 4/1/2023
03028000 West Branch Clarion
River at Wilcox, PA
1502.02 NGVD29 1501.00 4/1/2023
03028900 Elk Creek at
Ridgway, PA
    1364.7 4/1/2023
03029000 Clarion River at
Ridgway, PA
1361.62 NGVD29 1354.5 4/1/2023
03029500 Clarion River at
Cooksburg, PA
1147 NGVD29 1145.7

4/1/2023

03030500 Clarion River
near Piney, PA
1002.06 NGVD29 1001.5 4/1/2023
03031500 Allegheny River
at Parker, PA
845.14 NGVD29 844.8 4/1/2023
03031882 Redbank Creek at
Brookville, PA
1188.10 NGVD29 1187.5 4/1/2023
03033001

Allegheny River (lower
pool) near Rimer, PA

791.2 NGVD29 790.6 4/1/2023

01431600

Wallenpaupack Creek
at East Sterling, PA
*1237.93 / 1239.93 NGVD29 1237.26 3/1/2023
03012550 Allegheny River
at Kinzua Dam, PA
1192.55 NGVD29 1192.7 3/1/2023
01473470 Stony Creek at
Sterigere Street at
Norristown, PA
85 NGVD29  82.3 1/1/2023
01481000 Brandywine Creek
at Chadds Ford, PA
150.45 NGVD29  149.7 1/1/2023
03022554 Woodcock Creek at
Woodcock Creek Dam, PA
1126.92 NGVD29 1126.3 1/1/2023
03023100 French Creek at
Meadville, PA
1058.83 NGVD29 1058.26 1/1/2023
03025500 Allegheny River at
Franklin, PA
955.84 NGVD29  955.3 1/1/2023
03021350

French Creek near
Wattsburg, PA

1304.84 NGVD29  1304.7 12/1/2022
03021410 West Branch French
Creek near Lowville, PA
    1302.5 12/1/2022
03021520 French Creek near
Union City, PA
1191.16 NGVD29 1192.3 12/1/2022
03007800 Allegheny River at
Port Allegany, PA
1454.88 NGVD29     1454.4 11/1/2022
03015000 Conewango Creek
at Russell, PA
1221.77 NGVD29 1221.3 11/1/2022
03015310 Allegheny River bl
Conewango Creek
at Warren, PA
1169.04 NGVD29 1168.0 11/1/2022
03015500 Brokenstraw Creek
at Youngsville, PA
1186.92 NGVD29 1186.32 11/1/2022
03016000 Allegheny River at
West Hickory, PA
1059.9 NGVD29 1059.4 11/1/2022
03017500 Tionesta Creek at
Lynch, PA
1252.43 NGVD29 1252.0 11/1/2022
03033000 Allegheny River
near Rimer, PA
*813.2 / 831.5 NGVD29 812.6 11/1/2022
01427195 Equinunk Creek near
Dillontown, PA
*913.5 / 913 NAVD88     913.14 10/15/2022
01431500 Lackawaxen River
at Hawley, PA
869 NGVD29     868.45 10/15/2022
01432495 Shohola Creek near
Walker Lake, PA
*691.3 / 710 NAVD88     691.12 10/15/2022
01442500 Brodhead Creek at
Minisink Hills, PA
301.84 NGVD29     301.25 10/15/2022
01449360 Pohopoco Creek
at Kresgeville, PA
659.72 NGVD29     659.09 10/15/2022
01451000 Lehigh River at
Walnutport, PA
350.27 NGVD29     349.53 10/15/2022
01451400 Spring Creek at
Trexlertown, PA
359 NAVD88     365.93 10/15/2022
01451467 Leibert Creek
at Emmaus, PA
403 NAVD88     395.84 10/15/2022
01451500 Little Lehigh Creek
near Allentown, PA
253.41 NGVD29     252.71 10/15/2022
01451630 Cedar Creek at Mouth
near Allentown, PA
258 NAVD88     257.64 10/15/2022
01451650 Little Lehigh Creek
at Tenth St. Br. at
Allentown
245.63 NGVD29     244.93 10/15/2022
01451800 Jordan Creek near
Schnecksville, PA
381.16 NGVD29     380.48 10/15/2022
01452500 Monocacy Creek at
Bethlehem, PA
247.24 NGVD29     246.54 10/15/2022
01470500 Schuylkill River at
Berne, PA
310.65 NGVD29     309.94 10/15/2022
01470755 Maiden Creek near
Virginville, PA
440 NGVD29     308 10/15/2022
01472000 Schuylkill River at
Pottstown, PA
117.86 NGVD29     116.92 10/15/2022
01475510 Darby Creek near
Darby, PA
*19.41 / 18.90 NGVD29     18.1 10/15/2022
01494850 East Branch
Big Elk Creek at
Forestville, PA
410 NGVD29     395.2 10/15/2022
01516500 Corey Creek near
Mainesburg, PA
1337.5 NGVD29     1337.05 10/15/2022
01531500 Susquehanna River
at Towanda, PA
694.38 NGVD29     693.70 10/15/2022
01532000 Towanda Creek near
Monroeton, PA
765.53 NGVD29     764.84 10/15/2022
01533400 Susquehanna River
at Meshoppen, PA
599.76 NGVD29     599.1 10/15/2022
01554000 Susquehanna River
at Sunbury, PA
408.61 NGVD29     407.90 10/15/2022
03032500 Redbank Creek at
St. Charles, PA
973.14 NGVD29     972.5 10/15/2022
01440400 Brodhead Creek
near Analomink, PA
586.5 NGVD29     585.78 Updates made prior
to June 1, 2022 
01465500 Neshaminy Creek
near Langhorne, PA
40.57 NGVD29     39.54 Updates made prior
to June 1, 2022 
01478120 East Branch
White Clay Creek
at Avondale, PA
270 NGVD29     264.65 Updates made prior to
June 1, 2022 
01478137 Trout Run at
Avondale, PA
270 NGVD29     266.38 Updates made prior to
June 1, 2022 
01478185 Middle Branch
White Clay Creek
near West Grove, PA
406 NAVD88     396.6 Updates made prior to
June 1, 2022 
01478220 West Branch
White Clay Creek
near Chesterville, PA
             177.2 Updates made prior to
June 1, 2022 
01478245 White Clay Creek
near Strickersville, PA
120 NGVD29     113.4 Updates made prior to
June 1, 2022 
01480629 Buck Run at
Doe Run, PA
305.29 NGVD29     299.56 Updates made prior to
June 1, 2022