Stormwater Mgmt HDR Work Session ReportMEMORANDUM
December 5, 2002
TO:
FROM:
SUBJECT:
The Honorable Mayor and City Council Members
Michael C. Van Milligen, City Manager
Stormwater Management
WORKSESSION December 9, 2002
The worksession on stormwater management with a presentation by HDR Engineering
will be held on December 9, 2002 at the Dubuque Carnegie-Stout Public Library's third-
floor auditorium. Dinner will be served at 5 p.m. in the rotunda with the worksession
beginning at 5:30 p.m.
Background materials are attached. A copy of the Drainage Basin Master Plan was
previously distributed.
MCVM/ksf
Attachment
cc: Barry Lindahl, Corporation Counsel
Cindy Steinhauser, Assistant City Manager
Mike Koch, Public Works Director
Gus Psihoyos, Assistant City Engineer
City of Dubuque
City Council Work Session
December 9, 2002
Storm Water Management
Bee Branch Drainage Basin Improvements
I-DR rrm
Presentation Outline
Council Interview Common Themes
· Describe Alternative Selection Process
· Solve Upstream to Greatest Extent
· Urban Conservation/Suste/nable Design
· Maximize West 32nd Street Detention Cell
· Hydrologic Assumptions/1999 Experience
· Publ/c Outreach/Information Fair
~' Show a Channel Alignment/lq[ow Would it Look?
· Storm Water Management Overview
· Bee Branch Drainage Basin
- West 32nd Street Subarea
· Where We Go From Here
Tools to Manage Storm Water
· Runoff Reduction
· ImSltmtion Control
· Restrict Development
· Timing Changes
· Storage
· Dete~fion
· Increase Capacity
Master Planning Process
Input
Bee Branch Drainage Basin
Bee Branch Drainage Basin
Bee Branch
Drainage
Basin
Flood
Inundation -
Existing
System
Bee Branch Drainage Basin
Flood Minimization Alternative
Improvements
West 32nd Street Subarea
West 32nd Street Drainage Subarea
Alternatives Evaluated - ] 00-Year
West 32nd Street Drainage Subarea
Detention Site Alternatives
2
West 32nd Street Subarea
Alternative Evaluation
No. (miltlons)
Remaining Bee Branch Drainage Subareas
Bee Branch Drainage Basin
Flood Inundation- 100 Year
Remaining Bee Branch Drainage
Subareas Detention Site Alternatives
Bee Branch Findings Before
Alternatives Were Developed
Operating Conditions
3
Bee Branch Drainage Basin
Flood Minimization Alternative
Improvements
Bee Branch Drainage Basin
Open Channel Floodway Alternative
Examples of Open Channels in an
Urbanized Area
Conceptual Rendering of an Open
Channel in Dubuque
Where We Go From Here
Alignment Development
· Information Gathering/Public Outreach
· Coreauu~ty impacts Determination
4
MEMORANDUM
November 7, 2002
TO:
FROM:
SUBJECT:
The Honorable Mayor and City Council Members
Michael C. Van Milligen, City Manager
Stormwater Study - HDR
The work ~ession with HDR on the Stormwater Management Study is scheduled for
5:30 p.m., Monday, December 9, 2002, in the Library Auditorium. Dinner will be served
at 5:00 p.m. in the 3rd floor staff lounge. ·
While this is highly unusual, I have asked HDR to call Council Members and find out
about potential questions over the phone or set up an in-person meeting so that HDR
will be better prepared for the work session.
As of now, I have asked HDR to make a 30 minute presentation about the study and the
options considered. They might go longer to incorporate information on questions that
have been asked. The remainder of the work session would be questions and answers.
have attached historical information, including the study.
Michael C. Van Milligen
MCVM/jh
Attachments
cc: Barry Lindahl, Corporation Counsel
Cindy Steinhauser, Assistant City Manager
Pauline Joyce, Administrative Services Manager
Mike Koch, Public Works Director
Gus Psihoyos, Assistant City Engineer