I currently do side work for a one-man land development engineer as a contract / hourly employee. No benefits, insurance, etc. My real job handles all of that.
I do the stormwater calculations for the sites he is working on.
I'm a PE for about 10 years now.
I'm new to the geographic area...
I googled, and looked around on the Bentley forums to no avail. As far as I can tell, there's no elegant way to model a headwall in this program. (Often, I have a headwall intercepting channel flow at the top of a storm sewer system.)
I used a no-loss, 100% efficiency catch basin, with rim...
I just started using Bentley Stormcad after coming from Hydraflow for storm sewer analysis. Is there any way to define areas of cover (impervious, lawn, etc.) and have Stormcad overlay those with each catchment area to automatically generate a weighted C? I find that deriving the runoff...
The ratio of billable hours to worked hours required by your company?
Also include your title and industry.
Me:
81%, Civil Engineer Project Manager, Consulting Engineering Company
Is there a black and white rule for where to install base drain?
Is it from PC to PT on any sag curve where the road is in cut?
Is it anywhere the road is in cut?
I have an existing storm sewer that I want to leave in service, and supplement with a proposed storm sewer. The two systems will intersect at several points to equalize flows.
They do not follow the same route over a length of about 5000 feet, so I can't just treat them as one pipe. My...
I have a project in an area underlain by limestone. I want to control infiltration rates within my basins and other BMPs, but not seal them. Can anyone point me to a resource which will help me design a layer of soil to line the basins that will control infiltration?
Are there any...
From what I understand, the Tc is the distance from the beginning of runoff to the inflection point of the hydrograph. So, Tc has an effect on the peak runoff rate, but not the overall runoff volume in the SCS TR55 and TR20 models.
For example, if you have 3" of runoff for a given type II...
I have PreDev Drainage Area 1 (DA1) that goes to Study Point 1 (SP1). It has an onsite component and an offsite component. I have to reduce the peak 5yr post runoff rate to the pre 2yr rate, but only for runoff generated from the project property. (Basically I'm not responsible for reducing...
I like HydroCAD because of the critical duration analysis function which allows me to analyse multiple drainage areas simultaneously using rational method.
Does hydraflow hydrographs do this?
I'm using the rational method within Hydrocad to model a site with 14 drainage areas. 9 of the drainage areas are routed through detention basins. All of the runoff from the drainage areas and detention basins flows to a central stream, the bottom of which is the location for the site study...
I am required by ordinance to place child protection (bars) over the end sections of culvert and storm sewer pipes on the downstream end. I would like to use galvanized flared end sections instead of concrete endwalls. Has anyone ever seen a galvanized end section that incorporates child...
Today is my last day, and I would like to have some of the contacts that are in the company's outlook directory. I can import these into google mail for my future personal use.
Ethical or Unethical?
I'm thinking about going to night school (no "dark side" puns please) to become a lawyer. I have thought about it a long time, and think I would enjoy it more than an MBA or masters in engineering.
Does anyone see any particular marketability for a PE in civil coupled with a JD?
The only...
I started out in big construction, and had waaaay more responsibility than I was ready for. I feel like I rose to the occasion and was adequate in the role. Adequate enough, anyway, to get promoted in the company.
I went to government, and responsibility stayed the same, but I was treated...
I am trying to come up with a coefficient that will express the efficiency lost when going from a single culvert to a dual culvert system. I am doing this, because my stormwater program doesn't allow parallel culverts, and I'm trying to model a dual culvert within a system.
For example, If I...
If I ever start my own gig, I want to be able to have a fee structure that is based on something other than the billable hour. Therefore, I would have to sell a product.
A traffic impact study is a product. A flood study is a product. A survey is a product. An environmental impact study...
The typical formula used to calculate shear in a channel bottom is:
62.4 * Depth * slope in ft/ft = Shear in PSF
This is listed in Hec 15, Design of Channels with Flexible Liners.
Is this just an empirical formula? I don't see what slope has to do with shear in a channel, mathematically...
We often specify a temporary channel liner in a swale to prevent erosion.
Let's say that liner is a single-net straw blanket w/ a shear resistence of 1.55 psf.
Ideally, grass is going to grow in to replace the temporary liner. However, grass can have a shear resistence as low as 0.6 psf...
