Search results for query: *

Anyone know of good sources or guide for designing a domestic water system to serve 30 lots from well and storage tank/reservoir? I'm in the preliminary stage now (calculating demand for fire and max hourly use). I believe the requirement for fire is 1000 gpm/dwelling (under 3600 sf). I found...

Anyone have tips on foundation analysis and inspection per HUD-7584. These seem like they would be fairly straightforward if you have all the manufacturer's specifications and hopefully the foundation plans. I'm being asked to certify a Fuqua model from 1979 here in Redmond, OR. The appraisal...

Thanks for your comments, LHA. I've had a wetland specialist delineate the area and received fill permits from our Department of State Lands and COE. I don't believe that DEQ gets involved unless you eject into the ground. I imaged the same as you suggest with a perimeter swale to collect the...

I understand that sizing the pipe/channel will depend on the expected quantity of runoff. I'm interested in some feedback from anyone who has taken on a task such as this. I have had a wetland delineation made for the area and it has been surveyed. I'm interested in BMPs for diverting a...

I understand the hydraulics and plumbing code for residential into public sewer. It's the actual quantity of flow out of each individual septic tank that I'm after. Our DEQ has a table that lists typical residential use as 450 gpcd (avg max). This number converts to 0.0007 cfs, which is...

For a sanitary sewer between the primary septic tank of a single-family residential dwelling and the secondary treatment facility (Orenco AX-100 or like for 11 dwellings) what method is acceptable for sizing. The average max flow per dwelling is 450 gpd around here. Is this the flow I would...

I have a project adjacent to a river that the state of Oregon has declared no pollutants be drained to. I'm looking for a sanitary sewer system (pressure gravel/sand filter)to serve between 12-25 residential lots. I would appreciate any direction, recommendations or suggestions. Thanks, Scott

I have a project adjacent to a river that the state of Oregon has declared no pollutants be drained to. I'm looking for a sanitary sewer system (pressure gravel/sand filter)to serve between 12-25 residential lots. I would appreciate any recommendations or suggestions. Thanks, Scott

What would be the maximum grade break for a private roadway serving 4 residential units? I have an inverted crown section, so everything drains to the middle and this grade break would occur near a 90 degree turn. Client wants me to raise grade to more closely match existing ground, but I'm...

Thank you all for the responses. I have spoken to the client and convinced him to proceed with the steel cage. Thanks to PEinc for the approximate dimensions and cvg for reinforcing what I believe about assuming liability, also, if I don't feel certain about it I let some one who does feel...

I recently had a client ask me if I would approve using timber shoring in place of metal cage to lay sewer 10 feet deep in type C soil. I told my client that this was not an area of my expertise and that I would need to consult a geotechnical engineer for an alternative design. While browsing...

I am confused whether 8 psi or 15 psi should be used for private residential dwellings (4-plex). Code book I have says 15 psi for flushometer valves and 8 psi for flush tanks. Plans don't call for flushometer valve toilet, so do I automatically use 8 psi or am I missing something? Thanks in...

I have a couple "technique" questions for sizing private residential multiplex townhouses. 1. When counting pressure losses from the city's main: -What's a typical loss from the tap to the meter (1-1/2")? -Is 3 psi reasonable for loss through the meter? -For a run of 350 LF with...

I have a client who wishes to develop riperian property to residential lots. The existing grades are as much as 12 feet below base flood elevation, however, the developed portion of the site will be outside FEMA's mapped floodway. To compound things further, a seasonal tributary flows through...

Thank you for your reply, Maury. I understand detention will lessen the immediate impact (in this case the difference between a 10-yr design event and a 5-yr existing conditions events) however these systems are design with overflow components usually designed for a 25-yr or 50-yr event. The...

Thanks for the reply, bltseattle. You're correct this area was badly flooded even in 1996 (not a 1% event) and many lawsuits have been made.

I'm working on a site inside a Municipality with no storm sewer within a reasonable distance for the scope of work being designed. The existing soil is silt loam with high seasonal water table and slow permeability. I've thought about the idea of treating the runoff and releasing it into a...