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Updating Pennsylvania Streamgage Datums

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). 

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 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
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 

 

 

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