Ditch 6 at Cowan Road water level
Galveston County Drainage District 1 gauge 9020 · Ditch 6 · published on the Harris County Flood Warning System
water surface elevation, Oct 21, 2026 at 3:17 PM CDT · 2 hours ago
- Below top of bank
- 5.8 ft
- Top of bank
- 25.3 ft
- Lowest since Oct 21
- 19.43 ft
- Highest since Oct 21
- 19.46 ft
This gauge has been recorded here since October 21, 2026 (3 readings so far). Its usual range and how today compares with its history appear once it has 14 days of readings.
Last 7 days
Hourly averages of readings as published. This gauge reports only when its value changes, so gaps in the line are normal.
| Time | Level | Below top of bank |
|---|---|---|
| Oct 21, 3:00 PM CDT | 19.46 ft | 5.8 ft |
| Oct 21, 11:00 AM CDT | 19.46 ft | 5.8 ft |
| Oct 21, 7:00 AM CDT | 19.43 ft | 5.9 ft |
How to read this gauge
The number above is an elevation, not a water depth. It is the height of the water surface above a fixed reference level, so Cowan Road reads around 19 ft even when the channel is low. What matters is the distance to the top of bank: the elevation at which water reaches the top of the channel at this location. For this gauge that is 25.3 ft.
The bottom of the channel here sits at 19.2 ft, so the channel is roughly 6.1 ft deep at this crossing. Galveston County Drainage District 1 publishes the top-of-bank figure with each reading; it is their reference, not an estimate made here.
Daily highs and lows since October 21, 2026
Download the readings
ditch-6-at-cowan-road.csv (CSV): every reading stored for this gauge since October 21, 2026, 3 rows, updated with this page. Columns: time in UTC, time in Central, water surface elevation, top of bank, and distance below top of bank, all in feet. The source and accuracy notes below apply to the file too.
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All Galveston County Drainage District 1 gauges: Galveston County Drainage District 1 water levels.