I'm working on a project which is in mountainous terrain. The elevation at the peak is 500 which slopes down at 1H:1V to elevation 405 where there is a level flat area about 12-15 feet wide. I’ll call this “flat area #1”. After “flat area #1” the elevation falls again at 1H:1V to elevation 363...
I've been tasked to come up with a life cycle cost analysis spreadsheet for various existing culverts.
Things to consider:
1) Many of these culverts are large diameter CMP
2) Many of these culverts are already at the end of their service life. Internal corrosion. Bituminous Coating gone on...
Where in Florida is the project site? In some areas the State has regulated the NPDES down to the local authority. The NPDES is a boiler plate set of plans for turbid stormwater discharge. I don't see how LEED will dictate your storm water pollution prevention plan.
I've designed a directional drilled gravity pipe. The gravity pipe itself is typically inside a casing. The casing allows the gravity pipe to have a continuous and constant slope.