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Stream Elevation Sensor 478
475 Brays Bayou @ Bellaire Boulevard
Sensor ID 478
Sensor Type Bubbler
Installed 1/21/1999
Flooding Likely 69.20'
Flooding Possible 66.20'
Bottom of Stream 43.30'
Tip of Orifice 47.73'
Measuring Plate 70.31'
Benchmark 70.31'
RM 040230 stamped D100 BM 22 located on the downstream sidewalk of the east bound bridge at stream centerline, 1988 NAVD, 2001 adjustment. 78 to 01 Adjustment -3.0'
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 478 is 48.57'
Reading on 7/14/2025 3:37 PM
Export to Excel
2 Days
Sensor
Reading Date
Elevation
4787/14/2025 3:37 PM48.57'
4787/14/2025 11:37 AM48.54'
4787/14/2025 7:37 AM48.54'
4787/14/2025 6:21 AM48.55'
4787/14/2025 4:15 AM48.65'
4787/14/2025 3:37 AM48.68'
4787/14/2025 2:07 AM48.76'
4787/14/2025 12:13 AM48.87'
4787/13/2025 11:37 PM48.91'
4787/13/2025 10:21 PM48.98'
4787/13/2025 9:11 PM49.08'
4787/13/2025 8:13 PM49.19'
4787/13/2025 7:37 PM49.27'
4787/13/2025 7:25 PM49.30'
4787/13/2025 6:53 PM49.40'
4787/13/2025 6:23 PM49.51'
4787/13/2025 5:57 PM49.62'
4787/13/2025 5:37 PM49.72'
4787/13/2025 5:19 PM49.83'
4787/13/2025 5:15 PM49.86'
4787/13/2025 5:03 PM49.94'
4787/13/2025 5:01 PM49.96'
4787/13/2025 4:49 PM50.05'
4787/13/2025 4:45 PM50.09'
4787/13/2025 4:35 PM50.17'
4787/13/2025 4:31 PM50.21'
4787/13/2025 4:23 PM50.27'
4787/13/2025 4:15 PM50.35'
4787/13/2025 4:11 PM50.39'
4787/13/2025 4:01 PM50.49'
4787/13/2025 3:47 PM50.60'
4787/13/2025 3:45 PM50.64'
4787/13/2025 3:37 PM50.72'
4787/13/2025 3:31 PM50.79'
4787/13/2025 3:23 PM50.85'
4787/13/2025 3:15 PM50.92'
4787/13/2025 3:09 PM50.96'
4787/13/2025 3:01 PM51.01'
4787/13/2025 2:45 PM51.07'
4787/13/2025 2:35 PM51.07'
4787/13/2025 2:15 PM50.96'
4787/13/2025 2:07 PM50.85'
4787/13/2025 1:59 PM50.71'
4787/13/2025 1:55 PM50.58'
4787/13/2025 1:51 PM50.42'
4787/13/2025 1:47 PM50.22'
4787/13/2025 1:45 PM50.11'
4787/13/2025 1:43 PM50.01'
4787/13/2025 1:41 PM49.86'
4787/13/2025 1:39 PM49.72'
4787/13/2025 1:37 PM49.58'
4787/13/2025 1:35 PM49.44'
4787/13/2025 1:33 PM49.27'
4787/13/2025 1:31 PM49.13'
4787/13/2025 1:29 PM49.01'
4787/13/2025 1:25 PM48.83'
4787/13/2025 1:19 PM48.65'
4787/13/2025 12:37 PM48.52'
4787/13/2025 12:21 PM48.42'
4787/13/2025 11:37 AM48.34'
4787/13/2025 7:37 AM48.31'
4787/13/2025 6:49 AM48.31'
4787/13/2025 3:37 AM48.41'
4787/12/2025 11:37 PM48.48'
4787/12/2025 7:37 PM48.49'
Flood Frequency
Elevation
10% (10-year)68.80'
2% (50-year)71.60'
1% (100-year)72.20'
.2% (500-year)73.50'
Historical Storm
Date
Event
Elevation
8/18/1983Alicia58.90'
9/19/1983 67.00'
10/18/1994 64.20'
9/11/1998Frances61.30'
11/17/2003 65.90'
9/13/2008Ike58.30'
4/28/2009 63.40'
1/9/2012 60.40'
5/26/2015 66.60'
4/18/2016 66.00'
1/18/2017 60.70'
8/27/2017Harvey69.10'
9/21/2020Beta59.40'
7/8/2024Beryl61.80'
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.