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Stream Elevation Sensor 403
400 Harris Gully @ South McGregor Way
Sensor ID 403
Sensor Type Pressure Transducer
Installed 7/1/1993
Flooding Likely 39.10'
Flooding Possible 36.10'
Bottom of Stream 20.60'
Tip of Orifice 20.70'
Measuring Plate 36.83'
Benchmark 38.81'
RM 040101R stamped RM 040101R located on the downstream side of MacGregor on top of the north end pedestrian bridge curb, 1988 NAVD, 2001 adjustment. 78 to 01 Adjustment -1.2'
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 403 is 20.91'
Reading on 6/4/2025 8:23 PM
Export to Excel
2 Days
Sensor
Reading Date
Elevation
4036/4/2025 8:23 PM20.91'
4036/4/2025 7:43 PM21.02'
4036/4/2025 7:27 PM21.07'
4036/4/2025 7:17 PM21.12'
4036/4/2025 6:35 PM21.22'
4036/4/2025 6:15 PM21.11'
4036/4/2025 5:23 PM21.21'
4036/4/2025 5:05 PM21.34'
4036/4/2025 5:01 PM21.21'
4036/4/2025 4:43 PM21.09'
4036/4/2025 4:35 PM20.97'
4036/4/2025 4:17 PM20.85'
4036/4/2025 3:27 PM20.71'
4036/4/2025 11:27 AM20.68'
4036/4/2025 7:27 AM20.73'
4036/4/2025 3:27 AM20.69'
4036/3/2025 11:27 PM20.70'
4036/3/2025 7:27 PM20.69'
4036/3/2025 3:27 PM20.73'
4036/3/2025 11:27 AM20.69'
4036/3/2025 7:27 AM20.69'
4036/3/2025 3:27 AM20.69'
4036/2/2025 11:27 PM20.69'
Flood Frequency
Elevation
10% (10-year)34.90'
2% (50-year)38.20'
1% (100-year)39.90'
.2% (500-year)43.00'
Historical Storm
Date
Event
Elevation
9/13/2008Ike34.00'
1/9/2012 36.10'
5/26/2015 38.00'
4/18/2016 37.40'
1/18/2017 35.30'
8/27/2017Harvey41.50'
9/21/2020Beta36.20'
7/8/2024Beryl38.00'
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.