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Stream Elevation Sensor 459
460 Brays Bayou @ Gessner Road
Key Map 530T
Sensor ID 459
Sensor Type USGS Radar
Installed 4/24/1984
Flooding Likely 57.00'
Flooding Possible 54.00'
Bottom of Stream 35.87'
Tip of Orifice 64.41'
Measuring Plate 63.36'
External Link USGS
Benchmark 62.35'
RM 040195 stamped D100 0195D located in the downstream sidewalk at stream centerline, 1988 NAVD, 2001 adjustment. 78 to 01 Adjustment -2.65'
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 459 is 38.85'
Reading on 2/4/2023 6:44 AM
Export to Excel
2 Days
Sensor
Reading Date
Elevation
4592/4/2023 6:44 AM38.85'
4592/4/2023 6:34 AM38.87'
4592/4/2023 2:34 AM38.97'
4592/4/2023 12:02 AM38.96'
4592/3/2023 10:34 PM39.02'
4592/3/2023 6:34 PM39.02'
4592/3/2023 2:34 PM39.00'
4592/3/2023 10:34 AM38.97'
4592/3/2023 6:34 AM39.04'
4592/3/2023 5:26 AM39.06'
4592/3/2023 3:04 AM39.17'
4592/3/2023 2:34 AM39.20'
4592/3/2023 12:28 AM39.28'
4592/2/2023 10:34 PM39.34'
4592/2/2023 8:10 PM39.39'
4592/2/2023 6:34 PM39.47'
4592/2/2023 6:08 PM39.49'
4592/2/2023 4:14 PM39.60'
4592/2/2023 2:44 PM39.71'
4592/2/2023 2:34 PM39.72'
4592/2/2023 12:58 PM39.82'
4592/2/2023 11:56 AM39.94'
4592/2/2023 10:52 AM40.05'
4592/2/2023 10:34 AM40.09'
Flood Frequency
Elevation
10% (10-year)60.40'
2% (50-year)62.60'
1% (100-year)63.00'
.2% (500-year)64.40'
Historical Storm
Date
Event
Elevation
6/18/1973 55.20'
8/18/1983Alicia54.40'
9/19/1983 61.40'
8/1/1989Chantal57.20'
10/18/1994 59.50'
9/11/1998Frances56.70'
6/9/2001Allison #256.00'
11/17/2003 60.80'
9/13/2008Ike56.60'
4/28/2009 56.90'
1/9/2012 58.20'
5/26/2015 61.70'
4/18/2016 59.00'
1/18/2017 57.50'
8/27/2017Harvey63.30'
9/21/2020Beta55.80'
High water mark elevations are approximate.
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