Hi all,
Discussion at work came up about what the annual recurrence interval says with regard to each rain event in a given year. For example, say we have a 10 year event. Then in any given year, there is a 10% chance that the event will be equaled or exceeded. Can the annual recurrence...
In the context of a horizontal alignment, what direction is considered up-station and what direction is considered down-station? For example, say we are at Sta 15+00. Is Sta 12+00 considered down-station, or up-station of our location?
Hi everyone -
Today my boss asked which occurs more frequently - a 10-year 12 hour storm? Or a 10-year 24 hour storm? My understanding of the math is that they have the same frequency. However, my gut says something is wrong about this conclusion because it then means that a more "severe"...
Does anyone have an idea of why we often limit our culvert headwater depth versus diameter (HW/D) to a maximum 1.5 to 2.0? I've seen these values mentioned in various stormwater design manuals.
Does it have something to do with uplift pressures on the conduit?
The roads on our project will be constructed at the beginning of a multi-year phased construction project. The owner has opted to place the final pavement lift at the end of the project (probably 3 years after the first pavement lift is placed). We are going to stripe the roads with the...
