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Local laws do not have specific guidance on the compaction of backfilled soils below the leach field.

I need to place about ten feet of fill to bring the site up to grade and install a septic leach field. Are any specific compaction requirements/procedures for the backfills under aleach field?

I need to place about ten feet of fill to bring the site up to grade and install a septic leach field. Are any specific compaction requirements/procedures for the backfills under aleach field?

Thank you Peter and Cvg for you input I need to develop a rainfall distribution for this evaluation. Here is some information on the problem This is landfill site with stormwater swales along the slopes that collect water along slopes and carry to a downchute. The swales were designed for 25...

I need to evaluate a drainage system for the capacity to capture and convey stormwater runoff from cloud bursts. Is there any guidance available on what storm frequency and duration we should use to capture intensity and volume from a typical cloud burst. Zahid

Thank you gbam and FacEngr for the valuable information The project's jurisdiction has very similar storm event design criteria as in FacEngr's post. I am still trying to figure out the duration part. here is some more information on the project The intersection is located at the downstream end...

I am working on mitigating the flooding of a roadway intersection. The area is highly urbanized. Is there any guidance as to what storm event and/or storm duration to use for designing mitigation measures?

If you are using the Mannings equation to design your pipes and ditches, be aware, at 40 or 50 PC slopes, you are outside the intended range for this equation. I would suggest oversizing the channel or pipes, maybe design for 50 to 60% of full capacity.

I am computing peak runoff from a development site using HydroCAD. The New Jersey code has the following requirement "In computing stormwater runoff from all design storms, the design engineer shall consider the relative stormwater runoff rates and/or volumes of pervious and impervious...

Do we need thrust block restraints on HDPE sewage forcemain bends that are fusion welded?

This is a very good illustration. This solves my dilemma. Thanks, bimr.

The Foundation wall is not only above but also above the finished floor. In a typical construction here, the wooden floor joist sits above the foundation wall, but in this case, the foundation wall is above floor level. How do we attach the wood flooring system to the foundation wall?

This will have a wood floor system

We are building on sloped ground. It is residential construction, concrete foundation with wood framing. Elevation difference north south is 6 feet (on either side of the proposed house). Owner would like to have one flat finished floor, with entrance in the middle of house (east side) and...

I have a phased development with a regional detention basin. The drainage area for regional detention basin is 36 acres. Twenty six acres of the drainage area are developed. we are in the last phase of this project and working on the developing 10 remaining acres. City is requiring a...

I am working on determining the carrying capacity of an old brick storm sewer system. Some of the segments in the system have sagged over the years resulting back pitched pipe runs. Manning formula does not work with negative slopes. Any ideas?