Notification of Intent to Update Streamgage Datums
Over the next year, streamgage datums will be updated to reflect elevations in North American Vertical Datum of 1988 (NAVD88).
The USGS Pennsylvania Water Science Center (PaWSC) will be updating 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 upcoming datum changes can be found below. This table will be updated monthly.
For more information on the streamgage datum conversion process, contact Marla Stuckey (mstuckey@usgs.gov).
USGS PaWSC Datum Conversion Table
Last updated 1/3/2023
[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 | Existing Datum Elevation (ft) |
Existing Datum | New Datum Elevation (NAVD88) (ft) |
Datum Update Date |
| 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 |
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 |
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 |