Does you "good" neighbour have 3 6 foot culverts in his driveway?.....do you?
yes, our neighbor has 2, i believe 7'something culverts,
we, aren't required to use such large culverts for our driveway because of the creek that runs under a street behind our lot (the creek in question) it runs around the "EAST" side of our property (or RIGHT hand side in the pics shown ITT) the creek is around 10 feet deep at the deepest points, and around 6 feet deep at the shallowest parts, are about the place where the Jeep and the Boat are.
The creek Y's at a point beside and behind our lot and runs behind our "good neighbors," lot, this creek is around 8 feet deep at deepest points, and 5-6 feet deep at the shallowest, which is at the point where it meets the "suspect culvert setup,"
the culverts that run under our driveway are to spec and are actually a "double" culvert setup where there are two 3'something concrete culverts, and on the drainage side of the culverts is what's called a "retainer wall sysem" or something, i think i showed it one of the vids.......it's point, is to actually "CATCH," debris before they can make it to the main creek, it worked exactly as designed.. it catches debris, and works as a "filter" to only allow water to move into a "buffer" area that is around 30 feet x 15 feet with 5 foot tall wooden walls built around the buffer area, on the the car side of this retainer system, there is a large opening, allowing filtered rushing "and it can REALLY get going fast, into the creek system directly to the "right in the pics" area
the reason our culverts and drainage system is so drastically different is because we live on the "slant" of a hill...our street goes uphill one way out of our driveway, and downhilll the other, there is a small stream, maybe 3-5 feet deep at the deepest parts that runs through the 2 acre wooded lots to the left of the house shown in the pics...... that's what drains through our culverts, and it actually even in the worst of rains is just a fash rush, not overflowing it's ridges.
the sun is coming up, i may go take pics of it in a little bit
🙂
**** to answer your other question about how i know the "code" is 6'2 culvert minimum x2, is because we talked to our neighbors about it years ago when they were building their house and driveway/culvert system