Fort Bend County
Detention & Retention Pond Construction in Katy, TX
Katy is flat, it floods, and Fort Bend and Harris County both know it — which is why almost any commercial development here has to hold its own stormwater rather than pushing it downstream. Detention is not an amenity on these sites, it is a permit condition.
A detention basin is an engineered volume, not a hole. It has to hold a specified quantity, drain down within a set time through a controlled outlet, and hold its side slopes while doing it. We build to the engineer's drawing and the elevations that come with it.
The failures we get called to fix are almost always the same two: silt has filled the basin so it no longer holds its design volume, or the outlet structure is blocked and it drains too slowly. Both are maintenance, and both are cheaper than a compliance problem.
What this covers in Katy
- Detention and retention basin excavation to engineered volume
- Outlet structures, weirs, and controlled-release devices
- Side slope shaping and stabilisation
- Desilting existing basins back to design capacity
- Access ramps for future maintenance equipment
How the work runs in Katy
Build to the engineered volume
A detention basin is a specified quantity of storage, not a hole. The elevations come from the drawing and are checked as the work goes.
Shape and stabilise the slopes
Side slopes that slough sediment into the bottom lose the volume the basin was built to hold, so they are shaped and protected as part of the job.
Set the outlet structure
The controlled release device decides how fast the basin drains down. It is the part inspectors look at and the part that blocks if it is wrong.
Leave maintenance access
An access ramp means the basin can be desilted later without rebuilding an entrance each time.
Detention & Retention Pond Construction in Katy — common questions
- What is the difference between detention and retention?
- A detention basin is dry between storms — it holds stormwater temporarily and releases it at a controlled rate. A retention pond holds a permanent pool. Which one a site needs is set by the drainage plan, not by preference.
- Why is my detention pond not draining properly?
- Almost always one of two things: silt has filled the basin so it no longer holds its design volume, or the outlet structure is blocked or damaged so it cannot release at the designed rate. Both are maintenance, and both are cheaper than a compliance problem.
- How often should a basin be desilted?
- It depends entirely on what drains into it. A basin catching runoff from bare or cultivated ground fills far faster than one on established landscaping. The practical trigger is measured capacity against the design volume, not a calendar.
- Can you build to an engineer's drawing?
- Yes, and that is how these should be built. The volume, the side slopes, and the outlet elevations come from the plan and are checked as the work goes rather than at the end.
Areas we serve around Katy
Cinco Ranch · Fulshear · Brookshire · Richmond · Cypress · Fort Bend County · Harris County
