Recent content by TBCEng07

We are working on the modifications to an existing sanitary sewer wet well. The goal for our project is to construct a new access tube outside of the wet well. Our work will involve the construction of a new access tube next to the wet well. we will then need to cut an opening in the wet well...

We have successfully used board styrofoam in a couple of locations with shallow waterlines (36" deep). Our typical frost penetration is to 48 here."

Civils make Targets Mechanicals make weapons

VFDs have become so common and much cheaper that we engineers love to use them.

When you do your calculations, remember that your new pump will have to push the water in the utilities forcemain as well. Most grinder pumps have suffcient head capacities to overcome this type of condition, but check it. Check Valves and Shutoff Valves are probably a good idea.

Some of the inspectors have been requesting that we require contractors to use a pipe laser for sanitary sewer construction. I think about half of the contractors around here use a laser. The others just use a rotating head laser level or some of the old timers will still shoot the elevations...

Check out this website. http://www.uni-bell.org/literature.php all of the materials listed here are available in book form as well. Talk to your PVC Pipe Rep.

We are paying ahead for the materials that are stored, not the rent for the space. I understand Ussuri, but by forcing the stored material account balance to zero, the contractor would not be credited for the materials that remain stored on site. How is storing half the materials in the second...

No new materials are being brought to the stie. Okay. i forgot the negative amount for materials used. Confused myself. Pay#2 would actually be $5000 Stored Materials and $220,000 of total work. The way our calculation works is that we have a negative number applied to our Total work in...

Can someone help settle a dispute between our staff. Our Contract is written in vague language. It says: you basically pay for stored materials. The Contractor has stored $10,000 worth of materials at the site. Now it is time to make the second progress payment. Pay # 1 - $10,000 Stored...

I agree with dicksewerrat. It depends largely on the contractor's ability. HDD Sewers can be done, but the contractor has to work more carefully and often slower to be sure he doesn't deviate from the proposed grade. You also are going to want to be sure of the type of soil you are boring...

Typically here everyone runs a minimum of 6-inch for house laterals or 8-inch sewers for residential developments up to a point (i.e. collector sewers). You can back calculate the needed sewer size using EPA's rule of 400 gpd / home X peak factor (see 10 states standard). Then use Mannings...

I am designing a concrete pad that is to receive wastewater and material removed from a sanitary sewer. A screen will be placed acrosss the pad to keep large debris out of the drain. I am trying to figure out where to begin as far as designing the screen to handle the wave of water that the...

http://news.yahoo.com/s/nm/20080117/lf_nm_life/newyork_waterfalls_dc This may be one of the worst ideas i have ever seen. Has anyone considered the scour around the pier? Silly artsy people help keep us rehabilitation engineers in businees.

We just received a set of plans for a sports arena parking lot to review as part of a peer review. Part of the project involves the construction of a storm water pump station. The 'designer' (not an engineer) of the pump station has sized the station for the water quality release rate which...