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Sacramento County Benchmarks
Posted: Mon Dec 19, 2016 3:06 pm
by LS_8750
I found the NAVD 88 benchmark list on SACMAPS but cannot find the map referenced in the document.
Local insight would be much appreciated.
Regards,
Re: Sacramento County Benchmarks
Posted: Tue Dec 20, 2016 7:47 am
by Jim Frame
The page grid identifiers refer to the Thomas Guide for Sacramento County. I don't know which edition was used to compile the grid references, but the 1992 edition has always corresponded to the BMs I've needed.
If you have a particular area of concern, let me know and I'll post a scan of the pages.
Re: Sacramento County Benchmarks
Posted: Fri Dec 23, 2016 12:49 pm
by LS_8750
I'm working on Roosevelt Avenue, between Stockton Blvd and 44th Street.
Can you forward the Thomas Guide pages?
Re: Sacramento County Benchmarks
Posted: Fri Dec 23, 2016 3:53 pm
by Jim Frame
I've attached a file that might be of help. The county BMs don't look promising -- there were none nearby listed in the current county document. There were a couple in the vicinity on an older (2005) list, but a look at Google StreetView indicates that they got eaten by the HCR monster. However, there are quite a few City of Sacramento marks in the area, and I've included those in the document. Based on StreetView, I color-coded most of them according to likelihood of success: red indicates that it's probably there and accessible, blue indicates maybe, and black indicates problematic access. Note that the city marks are NGVD29.
Good luck!