Agency
v
Subscribe to
Real-time Alerts
Location
v
Last
v
Reported from
v
Show Current Conditions
Stream Elevation Sensor 1688
1685 Greens Bayou @ Tidwell Road
Sensor ID 1688
Sensor Type Bubbler
Installed 4/1/2001
Flooding Likely 33.80'
Flooding Possible 30.80'
Bottom of Stream -0.10'
Tip of Orifice 2.88'
Benchmark 42.74'
RM 150044R is an aluminum disk located on the downstream sidewalk at the west end of bridge, 1988 NAVD, 2001 adjustment. 78 to 01 Adjustment -0.70'
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 1688 is 3.14'
Reading on 11/3/2025 6:52 PM
Export to Excel
2 Days
Sensor
Reading Date
Elevation
168811/3/2025 6:52 PM3.14'
168811/3/2025 2:52 PM3.19'
168811/3/2025 10:52 AM3.20'
168811/3/2025 6:52 AM3.25'
168811/3/2025 2:52 AM3.23'
168811/2/2025 10:52 PM3.24'
168811/2/2025 6:52 PM3.21'
168811/2/2025 2:52 PM3.20'
168811/2/2025 10:52 AM3.22'
168811/2/2025 6:52 AM3.25'
168811/2/2025 2:52 AM3.23'
168811/1/2025 10:52 PM3.21'
Flood Frequency
Elevation
10% (10-year)34.30'
2% (50-year)37.60'
1% (100-year)39.30'
.2% (500-year)42.90'
Historical Storm
Date
Event
Elevation
9/20/1979David32.60'
6/11/1981 27.70'
8/18/1983Alicia29.40'
5/19/1989 37.90'
6/26/1989Allison #137.90'
3/4/1992 37.70'
10/18/1994 34.40'
6/5/2001Allison #232.90'
6/9/2001Allison #241.60'
10/29/2002 36.40'
11/17/2003 33.80'
6/19/2006 26.90'
10/16/2006 31.90'
9/13/2008Ike33.90'
10/31/2015 32.00'
4/18/2016 31.90'
8/27/2017Harvey43.40'
9/19/2019Imelda35.90'
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.