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I need some opinions to this question. What design flow would you use to design a septic sewer system for a National Guard Rediness Facility? Facility includes typical fixtures like 20 showers, bathroom fixtures, kitchen equipment, etc. Based on fixtures, Total DFU's is 354 which will require a...

Thanks CVG. Not flap gates. Gates do slide up and down. Cities operational manual specifies closing the gates when gauge reaches certain level on river and also turn the pumps on since water will not be escaping. I am looking at all scenarios. Existing conditions had 3 pumps totaling 17,000 gpm...

I have a site that drains to the river thru a storm water pumping station. The gates close and the pumps get turned on when the river reaches a certain flood stage. 1. What is your understanding for the standard engineering practice designing storm water systems per above? Do I have to design...

Thanks for your opinions. A couple things: 1. We provided an "engineering opinion of probable cost" to the city; city interprets it as "engineer's estimate". 2. There are some good reasons for the bids coming back higher than estimate- city didn't do themselves any favor in the sequence of...

I have a public project where bids came back 13.5% above the engineer's estimate. Only 2 bidders and both were above engineer's estimate and they were within 7% of one another. The public agency wants to redesign (value engineer) the construction documents to save this 13.5% about $700,000 and...

I think there is a height limit on retaining walls being signed by an SE or PE in Illinois. I think it is 48". Anything over 48" above ground needs to be signed off by an SE. What about light pole bases? Can a PE sign off on this or an SE since this involves loads and stresses?

I have been asked to show the 12" gravity storm sewer on site can handle the 4" gravity drain tile discharge around a building. Does anyone know if this is possible? Storm sewer is sized per rational method for the 10yr storm event. Drain tile around building is used for subsurface...

I need some opinions on the following: 1. I have an existing 100,000 sf industrial building (1000'along riverx 100' wide)along a river approximately 15' from the bank of the river. Existing FFE is 100.00. Existing 100 year BFE is 100.46. We are raising the FFE to 101.75 more than a 1' above...

Does anybody see any problems that could occur if I call out directional drilling an 8" polyethlene storm sewer at 1.00% under an existing concrete pedestrian tunnel under a railroad spur track? Pipe will be used for gravity draining a couple trench drains for a pedestrian walkway down to...

Yes,the 100 yr. BFE of the river is approx. 3.75' higher than the NWL based on studies. In fact, it may be less with the new flood study FEMA is conducting. A dam (used by a power plant now gone) exists just downstream of the site. Does silt back up when foundation drains become inundated with...

Is it acceptable to daylight foundation drains below the 100yr BFE? or is it better to have the foundation drain system separated so backup does not occur during the 100 yr event. I have an existing building (100,000 sf.) that exists inside the 100 yr floodplain next to a river. Existing FF =...

I am skeptical also about making a case about increase impervious area and decreased runoff. I'm not familiar with New York or the site, but the 100 year flood elevation needs to be taken into account with construction. How can BMP's be selected without taken into account all conditions?

A contractor is removing old natural gas distribution pipe(8" steel) from a roadway. Is this pipe considered hazardous waste and need to be sent to the landfill or is it good to go to metal recycling yard? The pipe still smells like natural gas.

msquared48 - Yes, your right with new EPA rules. This has been addressed in the special provisions. Do stamps expire even if you have renewed your license? Everyone- I don't see a public health and safety issue with the current state the plans are in. Is it acceptable practice to do field...

I signed a set of 100% engineering plans 2 years ago for a local governmental agency that was to be let at that time. Due to budgetary cutbacks the project was postponed. Now the local agency wants to dust the plans off and do the project. The project is reconstruction of a residential street...

So I should pose this question on some lawyer's org. forum. Yes, this is a future project. The site is a former steel manufacturing plant. The detention area will be on the most contaminated area of site with contaminates of PCE, TCE. Elevated DRO, PAH's,PCB's. UST's also exist in area. I've...

I have a client who has fee simple ownership of a piece of property. The city has a stormwater maintenance easement on part of it to install, maintain, operate an repair a regional underground detention system. City's excavation will be around 20,000 cy to install detention. Excavated material...

Does anyone see a problem with the following situation? An existing road that is 41' B-B and 4 lanes (10' lanes)with road overlayed up to the face of curb (monolithic curb). Raise curb up 2" and put in B4.18 curb with gutter matching slope of road (no overlay) and still have 4 lanes traffic.