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Stream Elevation Sensor 339
340 Sims Bayou @ Telephone Road
Sensor ID 339
Sensor Type USGS Bubbler
Installed 6/18/1983
Flooding Likely 26.20'
Flooding Possible 23.20'
Bottom of Stream -2.30'
Tip of Orifice -1.02'
Measuring Plate 30.75'
External Link USGS
Water Level Forecast Information NWS
Benchmark 28.52'
RM 030040 stamped C100 BM04 Reset 01 located on the downstream sidewalk at stream centerline, 1988 NAVD, 2001 adjustment. 78 to 01 Adjustment -0.8'
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 339 is 0.39'
Reading on 7/7/2025 11:24 PM
Export to Excel
1 Hour
Sensor
Reading Date
Elevation
3397/7/2025 11:24 PM0.39'
3397/7/2025 11:04 PM0.40'
Flood Frequency
Elevation
10% (10-year)18.40'
2% (50-year)23.00'
1% (100-year)25.60'
.2% (500-year)30.60'
Historical Storm
Date
Event
Elevation
9/11/1961Carla25.80'
5/21/1970 25.60'
9/10/1971 25.60'
6/20/1973 25.10'
7/25/1979Claudette27.90'
9/20/1979David28.40'
5/3/1981 25.20'
6/5/1981 24.80'
8/31/1981 26.60'
8/18/1983Alicia28.50'
8/1/1989Chantal26.70'
10/18/1994 24.90'
3/12/1997 13.80'
6/5/2001Allison #220.20'
6/7/2001Allison #215.40'
6/9/2001Allison #223.20'
6/19/2006 16.80'
8/16/2007Erin13.10'
9/13/2008Ike18.70'
8/27/2017Harvey26.30'
High water mark elevations are approximate.
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