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To learn about the Corps of Engineers’ Addicks and Barker Reservoirs and their operation go here.


To see the flowrate in Buffalo Bayou at Piney Point Road, the Corps of Engineers’ operational flow control point, go to USGS Piney Point.



Key Elevations in Addicks Reservoir:


Low Point of Barker Cypress Rd.


Low Point of Eldridge Parkway


Low Point of SH 6



Addicks Reservoir Elevation Sensor 2109
2110 Addicks Dam
Key Map 448X
Sensor ID 2109
Sensor Type USGS Radar
Sensor Position Addicks Reservoir
Installed 1/12/2000
Flooding Likely 108.00'
Flooding Possible 105.00'
Bottom of Addicks Reservoir 66.26'
Tip of Orifice 66.48'
Measuring Plate 88.41'
External Link USGS
Benchmark 117.02'
RM 210403 stamped COE U100 BM08 located 6inches south of COE dedication monument. 78 to 01 adjustment -1.14
As of July 1, 2007, the elevation datum was changed from 1929 NGVD, 1978 adjustment to the 1988 NAVD, 2001 adjustment.

The Addicks Reservoir Elevation  chart showing Addicks Reservoir Elevation Left series.
Cross Section
Addicks Reservoir Elevation for sensor 2109 is 68.02'
Reading on 4/22/2021 2:21 PM
Export to Excel
24 Hours
Reading Date
21094/22/2021 2:21 PM68.02'
21094/22/2021 11:03 AM68.11'
21094/22/2021 8:21 AM68.12'
21094/22/2021 7:03 AM68.04'
21094/22/2021 4:51 AM68.01'
21094/22/2021 3:03 AM67.98'
21094/21/2021 11:03 PM67.92'
21094/21/2021 7:03 PM67.86'
21094/21/2021 4:01 PM67.90'
21094/21/2021 3:03 PM67.94'
Flood Frequency
10% (10-Year)96.50'
2% (50-Year)98.40'
1% (100-Year)100.30'
Historical Storm
5/15/1968 95.20'
3/9/1992 97.50'
10/23/1994 95.60'
11/17/1998 95.70'
11/7/2002 96.50'
7/26/2006 90.80'
4/28/2009 100.00'
7/12/2012 94.10'
5/31/2015 95.50'
4/18/2016 102.50'
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.