[Shop-talk] plumping question and sandrock sewers

[Nick Brearley]

pethier at comcast.net wrote:
>
> I have mentioned that Saint Paul is a river-bluff town.  Our city datum for 
> elevations is USGS sea level minus 694.10 feet.  This is based on some 
> point at some steamboat landing circa 1850.  
Hi Phil,

Interesting stuff, labour must have been cheap in those days. A lot of 
Cornish tin miners emigrated to the US in the 1800s. Saint Paul would 
have been a natural home for them. One small point, could that datum be 
plus 694.10 feet?

Regards.

Nick Brearley