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Scheduled Maintenance Notice
USGS will be performing maintenance on the time series data processing system beginning at 09:00 EDT on September 10, 2026. During this period, delivery of the latest time series data will be delayed. The maintenance is expected to finish within 2 hours, after which all backlogged time series data will be processed and delivered to WDFN web portals and APIs.

Local assumed datum was changed on October 1st, 2022. Prior to change, data were published in elevation in National Geodetic Vertical Datum 1929 (NGVD29).

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Available data

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Continuous data

3 data types available - data from 2022-10-01 to 2026-09-09

Daily data

2 data types available - data from 2000-10-01 to 2026-09-08

Field measurements

3 data types available - data from 2000-12-08 to 2026-08-13

Discrete sample data

60 Observed properties (data types) available - with data from 1960-02-19 to 2001-08-07

36 Sampling activities

Peak measurements

1 data types available - with data from 2022-10-01 to 2025-06-21

Statistical tables for select daily data types

2 data types available - data from 2000-10-01 to 2026-09-08

Location details and information

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US Army Corps of Engineers - St. Paul District

Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	05057500	n/a
Location name	LAKE ASHTABULA AT BALDHILL DAM, ND	n/a
Site type	Lake, Reservoir, Impoundment	LK
Decimal latitude (WGS84)	47.036189	n/a
Decimal longitude (WGS84)	-98.081536	n/a
Latitude-longitude method	Interpolated from digital map	N
Latitude-longitude accuracy	Accurate to + or - .01 sec (Differentially-Corrected GPS).	H
District	North Dakota	38
State	North Dakota	38
County	Barnes County	003
Country	United States of America	n/a
Altitude of gage/land surface	1201.23 feet	n/a
Method altitude determined	GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System	X
Altitude accuracy	0.02 feet	n/a
Altitude datum	North American Vertical Datum of 1988	NAVD88
Subbasin hydrologic unit	Middle Sheyenne	09020203
Drainage basin		n/a
Date of first construction		n/a
Drainage area	3856 square miles	n/a
Contributing drainage area	1910 square miles	n/a
Time zone abbreviation	CST	n/a
Site honors Daylight Saving Time	Y	n/a
National aquifer		n/a
Local aquifer		n/a
Local aquifer type		n/a
Well depth		n/a
Hole depth		n/a
Source of depth data		n/a

Monitoring location Lake Ashtabula at Baldhill Dam, ND - USGS-05057500