# Storm Drain Maintenance for Denver Properties

Storm drain maintenance is scheduled inspection and cleaning of a private storm system so that it still has full capacity when a real storm arrives. It is the cheapest work in this silo, and the reason it matters is that storm drainage fails silently: nothing tells you the line is half full until the day the water has nowhere to go.

- Scheduled basin and line cleaning.
- Interval set by what your system actually collects.
- Annual camera check on problem runs.
- Residential, HOA, and commercial sites.
- Documented condition over time.

## Why Does Storm Drainage Need Ongoing Maintenance?

Because it collects material by design. A storm system's job is to take surface water, and surface water carries whatever is on the surface. Every storm deposits a little more sediment in the flattest part of the run, and none of it leaves on its own.

The other reason is that the consequence of failure is water damage rather than inconvenience. A blocked sanitary line backs up into a fixture. A blocked storm line puts water against a foundation, into a window well, or across a parking area, and those are damage events rather than service calls.

- Sites with mature deciduous trees over the drainage.
- Properties with gravel or decomposed granite beds near grates.
- Below-grade entries, window wells, and areaways.
- Commercial lots where ponding blocks access or parking.
- HOA-managed common area drainage with shared liability.
- Any system that has already flooded once.

## How We Set a Realistic Maintenance Interval

The first visit is a survey and a clean, and it produces a number: how much material came out and how far along the run it had travelled. That measurement, not a generic annual recommendation, sets the interval.

After that we track it. A system producing the same volume each visit is on the right schedule. A system producing more each time has a source problem upstream, usually an unstabilised bed or a broken section admitting soil, and fixing that source is cheaper than cleaning forever.

- Basin and sump clearing.
- Line cleaning on the runs that accumulate.
- Discharge point verification.
- Periodic camera check on known problem sections.
- A written record of condition over time.

## How a Maintenance Programme Works

1. **Baseline survey** Camera the system, map it, clean it, and record how much material came out and from where.
2. **Set the interval** Frequency based on measured accumulation and on the consequence if that particular run fails.
3. **Service visits** Basins, runs, and discharge cleared on schedule, with a short written record each time.
4. **Escalate what recurs** Where a section keeps loading, we stop cleaning it and price the correction instead.

## What Maintenance Costs Against What It Prevents

A maintenance visit is priced on system size, number of basins, and run length, and it is a small, predictable number. The comparison worth making is not against doing nothing, it is against one flooded basement or one storm event that shut a commercial lot.

We do not sell a schedule to a property that does not need one. If your baseline survey shows a system that stays clean, we will tell you to check it every few years and leave it alone.

Call (720) 935-6221 to get a baseline done.

## Frequently asked questions

**When is the best time of year to clean storm drainage in Denver?**

Late autumn after leaf drop and again in spring before the heavy convective storms is the pattern that suits most metro properties. Autumn removes the leaf load before it compacts. Spring clears the winter grit and confirms capacity ahead of the season that actually tests it.

**Do you offer maintenance for HOAs and commercial properties?**

Yes, and those sites usually justify a schedule more clearly than single homes do, because the drainage is larger, the ponding affects access, and the liability for a flooded common area sits with the association or the owner.

**How do I know if maintenance is worth it on my property?**

Have a baseline survey done. If the system is clean and well graded, we will say so and you can leave it for several years. If it produces a wheelbarrow of sediment on the first clean, you have your answer.

**Who owns the storm drain on my property?**

In almost every case across the Denver metro, the storm drainage inside the property line is private. Area drains, trench drains, downspout lines, private catch basins, and the pipe carrying that water to the connection point are the owner's responsibility. The public system generally begins at the connection in the right-of-way.

**Are you the city stormwater department?**

No. Denver Sewer and Water is a private, family owned and operated company. We are not Denver Water or the City and County of Denver. We work on the privately owned storm drainage on your property. The public system in the street belongs to the municipality.

## Related Storm Drain Services

- [Storm Drains in Denver](https://www.denversewerandwater.com/storm-drains/denver-co) The full storm drainage lane: inspection, cleaning, repair, and replacement.
- [Storm Drain Cleanout](https://www.denversewerandwater.com/storm-drains/storm-drain-cleanout) Clearing silt, gravel, leaf mass, and root growth from storm lines and basins.
- [Storm Drain Scope and Video Inspection](https://www.denversewerandwater.com/storm-drains/storm-drain-scope-video-inspection) Camera survey of storm lines, basins, and outfalls before anyone quotes work.
- [Storm Drain Repair](https://www.denversewerandwater.com/storm-drains/storm-drain-repair) Fixing collapsed, offset, root-bound, and separated storm drain runs.

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Denver Sewer and Water is a privately owned, licensed and insured plumbing contractor. We are not affiliated with, endorsed by, or connected to Denver Water, the municipal water utility, or any government entity. To pay a municipal water bill or reach the public utility, visit denverwater.org.

Source: https://www.denversewerandwater.com/storm-drains/storm-drain-maintenance