Deep River at Grand Blvd at Merrillville water level

Name: Deep River at Grand Blvd at Merrillville water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, Deep River, Indiana, United States

Directions

Below flood stage

Water level

3.31ft Steady over the last 24 hours

Measured Oct 20, 2026, 12:15 PM CDT (31 min ago)

History

7 days

Water level Minor flood stage

What this means

The Deep River at Grand Blvd at Merrillville is at 3.31 ft, in the normal range.

It is 5.19 ft below the flood stage of 8.50 ft.

It has barely moved over the past 24 hours. In the last month it has stayed between 3.26 ft and 3.43 ft.

Fall is often low-water season on rivers, until steadier rain returns.

Judged against the official flood stage for this gauge. How to read levels

Key numbers

Highest on record: 11.80 ftFebruary 21, 2018

Floating and fishing near Deep River at Grand Blvd at Merrillville

Normal flows mean predictable rapids and good access at most put-ins.

Flood stage here is 8.50 ft, 5.19 ft above the current reading. Beyond it, the National Weather Service also defines moderate and major flood stages.

What happens at each level

14.50 ft: Ainsworth Road threatened near Hobart.
13.50 ft: US-30 threatened in Merrillville.
13.00 ft: Lincoln Highway threatened near Merrillville.
12.50 ft: Grand Boulevard threatened near Merrillville.
12.00 ft: Lake Park Avenue (IN-51) threatened near Hobart. Clay Street threatened near Merrillville.
11.50 ft: 101st Avenue threatened south of Merrillville. 61st Avenue threatened in Hobart.
11.00 ft: A few residential structures threatened along Colorado Street near Merrillville. Residential structure threatened along 61st Street in Merrillville. Colorado Street is threatened. Residential property threatened along Lake Park Avenue (IN-59) near Hobart.
10.50 ft: Low-lying portions of Indian Ridge Golf Course inundated near Hobart.
8.50 ft: Parking lots threatened at Deep River County Park.
8.00 ft: Low-lying agricultural land is inundated in and near Merrillville.
6.00 ft: Low-lying forest land threatened in and near Merrillville.
3.31 ft: Right now

Impact statements from the U.S. National Weather Service.

Highest crests on record

Rank	Level	Date
1	11.80 ft	February 21, 2018
2	11.36 ft	May 1, 2019
3	11.21 ft	September 28, 2019
4	11.09 ft	May 24, 2020
5	11.08 ft	January 11, 2020
6	11.07 ft	May 15, 2020
7	10.73 ft	April 30, 2020
8	10.73 ft	June 20, 2019
9	9.89 ft	May 9, 2021
10	9.44 ft	October 31, 2019

Weather at the gauge

Rain in the last 3 days: 0.64 in. Rain that falls upstream can take hours or days to show up at a river gauge.

17 Sat 56° 40° – Wind 13 mph

18 Sun 62° 38° – Wind 14 mph

19 Mon 67° 39° – Wind 7 mph

20 Tue 68° 49° – Wind 6 mph

21 Wed 68° 49° – Wind 6 mph

22 Thu 71° 51° – Wind 5 mph

23 Fri 70° 52° – Wind 8 mph

Forecast: Open-Meteo

Sunrise 07:07 AM Sunset 06:02 PM Daylight 10 hr, 55 min Waxing gibbous 70%

Map

Other gauges on the Deep River

Gauge	Level	Compared with normal	24 hours	Distance
Deep River at Lake George Outlet at HobartRiver gauge, Deep River	4.53 ft	Below flood stage	−0.03 ft	5.8 mi
Deep River near LiverpoolRiver gauge, Deep River	5.63 ft	Below flood stage	−0.04 ft	8 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Turkey Creek at 61st Av at MerrillvilleRiver gauge, Turkey Creek	5.54 ft	Below flood stage	+0.01 ft	5.1 mi
Little Calumet River near Lake StationRiver gauge, Little Calumet River	3.03 ft	Below flood stage	−0.01 ft	9 mi
Little Calumet River at Grant St at GaryRiver gauge, Little Calumet River	5.90 ft	Below flood stage	−0.04 ft	9 mi
Turkey Creek at Joliet St at ScherervilleRiver gauge, Turkey Creek	3.68 ft	Below flood stage	−0.01 ft	9 mi
Salt Creek at ValparaisoRiver gauge, Salt Creek	3.20 ft	Below flood stage	−0.01 ft	10 mi
Little Calumet River at Burr Street at GaryRiver gauge, Little Calumet River	4.32 ft	Below flood stage	−0.04 ft	11 mi
Portage-Burns Waterway at PortageCanal gauge, Portage-Burns Waterway	5.11 ft	Normal	+0.40 ft	12 mi
Grand Calumet River at Industrial Highway at GaryRiver gauge, Grand Calumet River	429 cfs	Normal	+24.0 cfs	13 mi

Questions and answers

What is flood stage for the Deep River at Grand Blvd at Merrillville?

The official flood stage is 8.50 ft. The level is currently 5.19 ft below it.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Deep River at Grand Blvd at Merrillville today?

On Oct 20, 2026, 12:15 PM CDT, the water level was 3.31 ft. Steady over the last 24 hours.

Is Deep River at Grand Blvd at Merrillville rising or falling?

Steady over the last 24 hours.

Is the level of Deep River at Grand Blvd at Merrillville normal?

Below flood stage. Judged against the official flood stage for this gauge.

What is the highest water level ever recorded at Deep River at Grand Blvd at Merrillville?

The highest level on record is 11.80 ft on February 21, 2018.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:04092944 (Agency page)
Coordinates: 41.45247, -87.25831 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	3.31 ft	2026-10-20 17:15	Provisional

Download

Embed this gauge

Add a live card for this gauge to your website. It updates on its own and links back here.

<iframe src="https://nivelmap.com/embed/11296?lang=en" width="360" height="230" style="border:0;max-width:100%" loading="lazy" title="Deep River at Grand Blvd at Merrillville water level"></iframe>

How to cite

U.S. Geological Survey: Deep River at Grand Blvd at Merrillville (usgs:04092944). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/indiana/deep-river-at-grand-blvd-at-merrillville

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer