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Stream Elevation Sensor 249
250 Horsepen Bayou @ Bay Area Boulevard
Sensor ID 249
Sensor Type Pressure Transducer
Installed 6/5/1985
Flooding Likely 12.80'
Flooding Possible 9.80'
Bottom of Stream -7.40'
Tip of Orifice -2.28'
Measuring Plate 17.65'
Benchmark 16.63'
RM 020070 stamped B104 BM01 located on the downstream sidewalk of the east bound lanes at stream centerline, 1988 NAVD, 2001 adjustment. 78 to 01 Adjustment -0.3'
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 249 is 0.92'
Reading on 7/31/2025 2:25 PM
Export to Excel
24 Hours
Sensor
Reading Date
Elevation
2497/31/2025 2:25 PM0.92'
2497/31/2025 12:55 PM1.02'
2497/31/2025 11:31 AM0.92'
2497/31/2025 11:19 AM0.94'
2497/31/2025 9:43 AM1.02'
2497/31/2025 9:07 AM0.92'
2497/31/2025 8:49 AM0.82'
2497/31/2025 8:33 AM0.70'
2497/31/2025 7:19 AM0.56'
2497/31/2025 6:45 AM0.60'
2497/31/2025 6:11 AM0.70'
2497/31/2025 4:37 AM0.81'
2497/31/2025 3:19 AM0.74'
2497/31/2025 1:15 AM0.71'
2497/31/2025 12:53 AM0.61'
2497/31/2025 12:31 AM0.50'
2497/31/2025 12:13 AM0.39'
2497/30/2025 11:45 PM0.28'
2497/30/2025 11:21 PM0.17'
2497/30/2025 11:19 PM0.17'
2497/30/2025 9:43 PM0.07'
2497/30/2025 7:19 PM0.14'
2497/30/2025 6:19 PM0.17'
2497/30/2025 5:11 PM0.27'
2497/30/2025 3:51 PM0.38'
2497/30/2025 3:19 PM0.41'
Flood Frequency
Elevation
10% (10-year)11.60'
2% (50-year)13.30'
1% (100-year)14.00'
.2% (500-year)15.70'
Historical Storm
Date
Event
Elevation
6/5/2001Allison #210.10'
6/9/2001Allison #214.60'
6/19/2006 6.60'
8/16/2007Erin9.10'
9/13/2008Ike11.20'
4/18/2009 11.30'
5/13/2015 13.40'
8/27/2017Harvey15.70'
High water mark elevations are approximate.
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