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Stream Elevation Sensor 1689
1690 Halls Bayou @ Airline Drive
Key Map 413J
Sensor ID 1689
Sensor Type Bubbler
Installed 2/1/1988
Flooding Likely 74.10'
Flooding Possible 71.10'
Bottom of Stream 59.72'
Tip of Orifice 61.01'
Measuring Plate 79.02'
Benchmark 77.73'
RM 150340 stamped P118 BM13 located on the downstream sidewalk at stream centerline, 1988 NAVD, 2001 adjustment. 78 to 01 Adjustment -1.40'
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 1689 is 61.63'
Reading on 7/21/2019 7:53 AM
Export to Excel
2 Days
Sensor
Reading Date
Elevation
16897/21/2019 7:53 AM61.63'
16897/21/2019 7:01 AM61.64'
16897/21/2019 3:53 AM61.68'
16897/21/2019 12:37 AM61.74'
16897/20/2019 11:53 PM61.75'
16897/20/2019 7:55 PM61.85'
16897/20/2019 7:53 PM61.86'
16897/20/2019 6:55 PM61.96'
16897/20/2019 6:25 PM62.06'
16897/20/2019 5:51 PM62.17'
16897/20/2019 5:11 PM62.28'
16897/20/2019 4:55 PM62.39'
16897/20/2019 4:33 PM62.51'
16897/20/2019 4:25 PM62.40'
16897/20/2019 4:21 PM62.29'
16897/20/2019 4:13 PM62.15'
16897/20/2019 4:07 PM62.03'
16897/20/2019 4:03 PM61.92'
16897/20/2019 3:59 PM61.79'
16897/20/2019 3:53 PM61.66'
16897/20/2019 11:53 AM61.61'
16897/20/2019 7:53 AM61.63'
16897/20/2019 3:53 AM61.67'
16897/19/2019 11:53 PM61.68'
16897/19/2019 7:53 PM61.67'
16897/19/2019 3:53 PM61.66'
16897/19/2019 11:53 AM61.65'
Flood Frequency
Elevation
10% (10-year)75.20'
2% (50-year)76.10'
1% (100-year)76.50'
.2% (500-year)77.40'
Historical Storm
Date
Event
Elevation
10/1/1949 72.90'
8/18/1983Alicia72.40'
10/25/1984 75.70'
3/4/1992 76.90'
3/12/1997 73.00'
9/11/1998Frances73.20'
6/5/2001Allison # 273.00'
6/9/2001Allison # 276.60'
10/29/2002 74.20'
11/17/2003 74.30'
12/14/2005 72.10'
6/19/2006 73.60'
10/16/2006 74.40'
9/13/2008Ike76.00'
10/31/2015 72.00'
4/18/2016 75.30'
8/8/2017 74.50'
8/27/2017Harvey77.00'
High water mark elevations are approximate.
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