Boulder County erosion controls may need to be in place before inspection

Perimeter control is the unglamorous part of any construction job: keeping disturbed soil from washing off the site and into places it does not belong. On a Boulder County project, getting it done is one of the first boxes you have to check.

The control measures have to be installed before you can schedule the first building inspection or the stormwater quality permit’s initial inspection. An inspector confirms the control is in the right spot, and from there it has to be maintained until the site is stabilized. In other words, it is not a one-and-done item you can pull out the moment the inspector leaves.

There is a practical reason the order is set up this way. A barrier of silt fence or straw wattle along the downhill edge keeps sediment out of the roads, ditches, creeks, and neighboring land below the site. Skip it, and a single storm can carry your topsoil straight into someone else’s yard or the nearest waterway.

The order also keeps your own project moving. When erosion controls are missing or in the wrong place, inspections stall, and a stalled inspection ripples into every step that depends on it. So before any grading, excavation, or building begins, find out exactly what perimeter control the site calls for. The county’s P14 publication spells out where the measures go and when the inspector expects to see them.