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Stream Elevation Sensor 418
420 Brays Bayou @ South Main Street
Sensor ID 418
Sensor Type USGS Radar
Installed 4/27/1984
Flooding Likely 41.00'
Flooding Possible 38.00'
Bottom of Stream 13.60'
Tip of Orifice 47.19'
Measuring Plate 50.09'
External Link USGS
Water Level Forecast Information NWS
Benchmark 46.53'
RM 040125 stamped D100 D-9A located on the downstream sidewalk at stream centerline, 1988 NAVD, 2001 adjustment. 78 to 01 Adjustment -1.4'
As of July 1, 2007, the elevation datum was changed from 1929 NGVD, 1978 adjustment to the 1988 NAVD, 2001 adjustment.

The Stream Elevation chart showing Stream Elevation Left series.
Cross Section
Stream Elevation for sensor 418 is 19.88'
Reading on 6/4/2025 10:23 PM
Export to Excel
2 Days
Sensor
Reading Date
Elevation
4186/4/2025 10:23 PM19.88'
4186/4/2025 10:11 PM20.00'
4186/4/2025 9:59 PM20.12'
4186/4/2025 9:47 PM20.25'
4186/4/2025 9:35 PM20.38'
4186/4/2025 9:25 PM20.51'
4186/4/2025 9:17 PM20.62'
4186/4/2025 9:07 PM20.73'
4186/4/2025 8:59 PM20.84'
4186/4/2025 8:49 PM20.96'
4186/4/2025 8:41 PM21.08'
4186/4/2025 8:35 PM21.19'
4186/4/2025 8:29 PM21.30'
4186/4/2025 8:19 PM21.44'
4186/4/2025 8:11 PM21.59'
4186/4/2025 8:05 PM21.69'
4186/4/2025 8:01 PM21.76'
4186/4/2025 7:59 PM21.81'
4186/4/2025 7:53 PM21.93'
4186/4/2025 7:47 PM22.05'
4186/4/2025 7:45 PM22.13'
4186/4/2025 7:41 PM22.19'
4186/4/2025 7:35 PM22.31'
4186/4/2025 7:31 PM22.39'
4186/4/2025 7:29 PM22.44'
4186/4/2025 7:23 PM22.60'
4186/4/2025 7:17 PM22.73'
4186/4/2025 7:15 PM22.81'
4186/4/2025 7:11 PM22.86'
4186/4/2025 7:01 PM23.01'
4186/4/2025 6:49 PM23.01'
4186/4/2025 6:45 PM22.88'
4186/4/2025 6:43 PM22.88'
4186/4/2025 6:37 PM22.72'
4186/4/2025 6:35 PM22.54'
4186/4/2025 6:31 PM22.33'
4186/4/2025 6:23 PM22.19'
4186/4/2025 6:15 PM22.10'
4186/4/2025 6:11 PM22.07'
4186/4/2025 6:05 PM21.95'
4186/4/2025 5:59 PM21.80'
4186/4/2025 5:53 PM21.65'
4186/4/2025 5:47 PM21.50'
4186/4/2025 5:41 PM21.30'
4186/4/2025 5:37 PM21.18'
4186/4/2025 5:35 PM21.04'
4186/4/2025 5:31 PM20.90'
4186/4/2025 5:29 PM20.78'
4186/4/2025 5:25 PM20.62'
4186/4/2025 5:23 PM20.44'
4186/4/2025 5:19 PM20.22'
4186/4/2025 5:17 PM20.01'
4186/4/2025 5:13 PM19.75'
4186/4/2025 5:11 PM19.45'
4186/4/2025 5:07 PM19.10'
4186/4/2025 5:05 PM18.68'
4186/4/2025 5:01 PM18.19'
4186/4/2025 4:59 PM17.59'
4186/4/2025 4:55 PM17.06'
4186/4/2025 3:29 PM16.87'
4186/4/2025 11:29 AM16.81'
4186/4/2025 7:41 AM16.85'
4186/4/2025 7:29 AM16.87'
4186/4/2025 5:19 AM16.96'
4186/4/2025 3:29 AM17.06'
4186/4/2025 1:55 AM17.17'
4186/4/2025 12:29 AM17.27'
4186/3/2025 11:29 PM17.35'
4186/3/2025 11:17 PM17.37'
4186/3/2025 10:25 PM17.47'
4186/3/2025 9:47 PM17.57'
4186/3/2025 9:11 PM17.68'
4186/3/2025 8:41 PM17.79'
4186/3/2025 8:13 PM17.91'
4186/3/2025 7:55 PM18.01'
4186/3/2025 7:35 PM18.12'
4186/3/2025 7:29 PM18.16'
4186/3/2025 7:17 PM18.23'
4186/3/2025 6:59 PM18.33'
4186/3/2025 6:37 PM18.45'
4186/3/2025 6:17 PM18.56'
4186/3/2025 4:47 PM18.67'
4186/3/2025 4:35 PM18.55'
4186/3/2025 4:25 PM18.42'
4186/3/2025 4:19 PM18.31'
4186/3/2025 4:13 PM18.17'
4186/3/2025 4:07 PM18.00'
4186/3/2025 4:05 PM17.89'
4186/3/2025 4:01 PM17.79'
4186/3/2025 3:55 PM17.57'
4186/3/2025 3:53 PM17.46'
4186/3/2025 3:49 PM17.36'
4186/3/2025 3:43 PM17.19'
4186/3/2025 3:35 PM17.04'
4186/3/2025 3:29 PM16.99'
4186/3/2025 3:07 PM16.93'
4186/3/2025 2:11 PM16.83'
4186/3/2025 11:29 AM16.74'
4186/3/2025 8:01 AM16.73'
4186/3/2025 7:29 AM16.74'
4186/3/2025 3:29 AM16.85'
4186/2/2025 11:29 PM16.87'
Flood Frequency
Elevation
10% (10-year)41.00'
2% (50-year)43.10'
1% (100-year)45.70'
.2% (500-year)50.00'
Historical Storm
Date
Event
Elevation
6/18/1973 41.20'
8/31/1981 41.50'
8/18/1983Alicia37.40'
9/19/1983 42.40'
8/1/1989Chantal38.80'
10/18/1994 42.20'
9/11/1998Frances39.60'
6/9/2001Allison #242.90'
11/17/2003 40.60'
9/13/2008Ike41.30'
4/28/2009 36.50'
1/9/2012 40.50'
5/26/2015 42.90'
4/18/2016 42.10'
8/27/2017Harvey45.70'
9/21/2020Beta39.80'
7/8/2024Beryl41.80'
High water mark elevations are approximate.
The Harris County Flood Control District (HCFCD) provides information via this website as a public service. While HCFCD makes every effort to ensure information is up-to-date, accurate and complete, HCFCD makes no representations, guarantees, or warranties as to the availability, accuracy, completeness, currency or suitability of the information provided via this website. HCFCD specifically disclaims any and all liability for any claims or damages that may result from providing the website or the information it contains. All liability with respect to actions taken or not taken based on the contents of this site is hereby expressly disclaimed.