Neighboring Pipe Slope

Last updated 8 years ago

First published 13 September, 2016

This method only works when the original pipe has ONE elevation value listed and only has TWO pipes connected to it.

Engineering,Utilities

English Rating: ALL ages Shortest path: 5 nodes Longest path: 9 nodes Possible solutions: 8

Christine Brown

Which elevation in the original pipe is missing? Upstream Elevation is Missing. Downstream Elevation is Missing.
Does the upstream neighbor pipe have a listed downstream elevation? No. Yes.
Sub this values in for the original pipe's missing upstream elevation..
Does the upstream neighbor pipe have a slope value? No. Yes.
Use Manhole Invert elevation as the method of calculating slope.
Does the upstream neighbor pipe have a listed upstream elevation? No. Yes.
Use the manhole invert elevation as the method of calculating slope.
Use the upstream neighbor pipe's upstream elevation, it's slope and it's length to calculate it's downstream elevation. The downstream elevation of this pipe is the upstream elevation of the original pipe in question. Use this value to calculate the slope of the original pipe..
Does the downstream neighbor pipe have a listed upstream elevation? Yes. No.
Sub this value in for the original pipe's missing downstream elevation..
Does the downstream neighbor pipe have a slope value? No. Yes.
Use Manhole Invert elevation as the method of calculating slope.
Does the downstream neighbor pipe have a listed downstream elevation? No. Yes.
Use Manhole Invert elevation as the method of calculating slope.
Use the downstream neighbor pipe's downstream elevation, it's slope and it's length to calculate it's upstream elevation. The upstream elevation of this pipe is the downstream elevation of the original pipe in question. Use this value to calculate the slope of the original pipe..