A Larimer County private crossing is also a drainage question

A driveway in the foothills and rural stretches of Larimer County is rarely just a strip of gravel. Where it crosses a ditch, a drainageway, a creek, or a steep draw, that crossing has a job to do, and a culvert that looks oversized in dry weather still has to swallow runoff, debris, and spring snowmelt without washing out the only way in for a fire truck.

That is why a private crossing, bridge, or culvert is not a single errand. A building permit comes from the Building Division, which is the part most people expect. The piece that catches owners off guard is Larimer County Engineering, which you should contact before you apply, because drainage, floodplain requirements, and other permits may come into play depending on what the water near your land actually does.

The cleaner way to think about it is that access and water travel together here. A crossing decides where your driveway lands and how a flood moves around it at the same time, so the review folds both questions into one path rather than treating the bridge as separate from the stream beneath it.

If you are weighing a new crossing or replacing an old one, a call to Engineering early tells you which of those reviews apply before you have poured anything. The county’s private crossings, bridges, and culverts page lists the contacts to start with.