Incomplete Topo Survey?
Incomplete Topo Survey?
(OP)
I'm attaching a a portion of a topographic survey with the hope of soliciting opinions regarding its completeness. I feel that basic data has been omitted, but I'm a bit out of my depth here and would appreciate any input.
Thanks in advance!
Thanks in advance!





RE: Incomplete Topo Survey?
any particular issue you're worried about?
RE: Incomplete Topo Survey?
Would you expand upon your comment regarding the relationship of the contours and the percent slopes?
Thanks for your help!
RE: Incomplete Topo Survey?
An example of a slope/contour discrepancy-where a 1.5% cross-slope is shown, contour is parallel to the road which would mean more like a 0% cross-slope.
25% would be a 1' drop in 4' horizontal. Can't tell what the drawing scale is. You could check if the slope along the road shown agrees with the contour spacing. (the slope in percent is the contour elevation interval divided by the spacing, times 100).
RE: Incomplete Topo Survey?
RE: Incomplete Topo Survey?
Regards,
Namdac
RE: Incomplete Topo Survey?
RE: Incomplete Topo Survey?
I agree with defining the contours but spot elevations would help too because, as others have noted the cross slopes, longitudinal slopes and contours don't seem to relate properly as they should.
Not sure what this is being used for but I would also want ground elevations beyond the edge of roadway. Maybe some typical road sections would help visualise what's going on better too.
RE: Incomplete Topo Survey?
RE: Incomplete Topo Survey?
That's some steep slopes at the end of the driveway. The design makes it marginally better, in my opinion. You might consider steepening a short straight section of the driveway to get a flatter slope at the bottom without offsetting the driveway as much.
RE: Incomplete Topo Survey?
You are getting "second opinions" here on this forum, but I suggest you contact another firm in your area to have a look. I think your eyes will be opened to what a real "firm" is capable of doing.
RE: Incomplete Topo Survey?
I agree that the firm isn't obligated to design the retaining wall, but I believe that they should have disclosed that they would not do so prior to offering a contract for services, especially when it was a reasonable possibility that a retaining wall would be needed.
I am in the process of interviewing local engineers/surveyors.
Thank you all for the invaluable advice!