Hi Rob – I have not had a chance to respond to your email yet, but will do so before our meeting today.
Dan updated the map to reflect what trunk line each basin drains too. He also updated the Big Meadow/Lexington Estate basin to correctly show it crosses over Toliver trunk line and drains to the Bear Creek basin.
He also updated the basin names to reflect the trunk line. “T” – Toliver and “BC” – Bear Creek.
Jennifer Cline, P.E.
City of Molalla
Public Works Director
O: 503.759.0218
F: 503.829.3676
"From: Dan Zinder [mailto:dzinder@cityofmolalla.com]
Sent: Thursday, November 20, 2014 11:21 AM
To: Jennifer Cline
Subject: RE: basin methodology
Ok – another run with TL instead of ML
From: Jennifer Cline [mailto:jcline@cityofmolalla.com]
Sent: Thursday, November 20, 2014 11:13 AM
To: Dan Zinder
Subject: RE: basin methodology
So shouldn’t the basin names start with a “T” instead of “ML” for the trunk line designation?
Jennifer Cline, P.E.
City of Molalla
Public Works Director
O: 503.759.0218
F: 503.829.3676
From: Dan Zinder [mailto:dzinder@cityofmolalla.com]
Sent: Thursday, November 20, 2014 11:11 AM
To: Jennifer Cline
Subject: RE: basin methodology
Ok – here is an updated version of the map. I’ll send along the calculations later today. One change to note – Big Meadow/Lexington actually drain to Bear Creek, not Toliver, hence the new basin name.
Also of note – the map is scaled to 10x7.5in. So, should fit to half inch margins on each side in word. I can save in different formats, as well (JPEG, GIF, etc).
Best,
Dan Z
From: Jennifer Cline [mailto:jcline@cityofmolalla.com]
Sent: Wednesday, November 19, 2014 5:38 PM
To: Dan Zinder
Subject: RE: basin methodology
Hi Dan,
After looking at this again, my only comment is we probably want to change the scale to miles.
Jennifer Cline, P.E.
City of Molalla
Public Works Director
O: 503.759.0218
F: 503.829.3676
From: Dan Zinder [mailto:dzinder@cityofmolalla.com]
Sent: Wednesday, November 19, 2014 10:27 AM
To: Jennifer Cline
Subject: basin methodology
Jenn – on basins, I chatted with Garrett yesterday afternoon and it sounds like it makes the most sense to stick with our initial basin definition, per below. These definitions will help them organize their field work better than regional divisions would. Smaller basins are now sub-basins of the trunk so there won’t be so many basins.
I color coded basins similar to the Cameron map to make it easier to read and left out labels for the smaller sub-basins off of the trunk lines.
I still need to do some trimming for parcels that aren’t receiving services. Also – the “Monopoly” subdivision (Boardwalk, etc.) is private but so far I have included them because their services drain to the main line.
Thoughts?
Methodology:
Basins are defined as service areas that drain to a single manhole along the main trunk line and Bear Creek lines with the following exceptions:
- Drainage areas with two or fewer branchings from trunk lines are considered sub-basins of that trunk line.
- Additionally, drainage areas that drain to a lift station are considered sub-basins to the basin receiving discharge from that lift station.
- Lexington Estates (ML_G1) has been divided as a sub-basin from Big Meadow (ML_G) to isolate impacts from the Lexington subdivisions.
- - - - - - - - -
Dan Zinder
GIS Analyst
City of Molalla
503.759.0226
503.586,8094 (c)