3 NPDES Phase II MS4 Permit Annual Report
CITY OF
CHANHASSEN
7700 Market Boulevard
PO Box 147
Chanhassen, MN 55317
Administration
Phone: 952.227.1100
Fax: 952.227.1110
Building Inspections
Phone: 952.227.1180
Fax: 952.227.1190
Engineering
Phone: 952.227.1160
Fax: 952.227.1170
Finance
Phone: 952.227.1140
Fax: 952.227.1110
Park & Recreation
Phone 952.227.1120
Fax: 952.227.1110
Recreation Center
2310 Coulter Boulevard
Phone: 952.227.1400
Fax: 952.227.1404
Planning &
Natural Resources
Phone: 952.227.1130
Fax 952.227.1110
Public Works
1591 Park Road
Phone: 952.227.1300
Fax 952.227.1310
Senior Center
Phone: 952.227.1125
Fax: 952.227.1110
Web Site
www.ci.chanhassen.mn.us
-3
MEMORANDUM
To: Todd Gerhardt, City Manager
From: Lori Haak, Water Resources Coordinator
Don Asleson, Natural Resources Technician
o~.
Date: March 6, 2006
Re:
National Pollutant Discharge Elimination System (NPDES) Phase II
Municipal Separate Storm Sewer System (MS4) Permit 2005 Annual
Report
SUMMARY
Staff is requesting the City Council:
1. Receive public comment on the City's NPDES Phase II MS4 Storm Water
Pollution Prevention Program and annual report; and
2. Review the City's progress on meeting the requirements of its MS4
permi t.
ACTION REQUIRED
Hold a public hearing for the 2005 NPDES II annual report.
BACKGROUND
In June 2002, the Minnesota Pollution Control Agency issued a MS4
general permit for cities discharging storm water into waters of the state.
Shortly after the permit was issued, the Minnesota Center for
Environmental Advocacy filed an appeal for the permit indicating that it
was inappropriate to issue a general permit in place of individual permits.
The failure to address non-degradation and education as part of the permit
were also reasons for the appeal. In May 2003, the Minnesota Court of
Appeals ruled in favor of the MCEA. The MPCA has since revised their
permit to address additional requirements. The revised permit resulted in
three contested case hearing requests from the City of Eagan, the League
of Minnesota Cities and Riley-Purgatory-Bluff Creek Watershed District.
The City of Eagan and the League of Minnesota Cities have since
withdrawn their contested case hearings. On March 1,2006, the MPCA
denied the contested case hearing from RPBCWD.
The City of Chanhassen · A growing community with clean lakes, quality schools, a charming downtown, thriving businesses, winding trails, and beautiful parks. A great place to live, work, and play.
NPDES Phase II MS4 Permit Annual Report
March 3, 2006
Page 2 of 3
As part of the revised permit, Chanhassen and 29 other communities are
required to address the non-degradation of all state waters. This
requirement has been added to determine if any new or expanded
discharges beyond 1988 baseline conditions (MR 7050.0815) exist within
the selected communities. As part of the non-degradation requirements,
Chanhassen will be required to model their storm water discharges to
determine if expanded discharges exist and what reasonable measures can
be taken to return pollution loading of receiving waters to levels
consistently achieved during 1988 baseline conditions.
A new permit application is required to bring the City in compliance
with the revised permit. Staff intends to use the revised permit application
as an opportunity to modify the current Storm Water Pollution Prevention
Program (SWPPP) where current measurable goals are inadequate or are
no longer practical. This will ensure that the City of Chanhassen is well
prepared to remain compliant with the permit and provide the additional
necessary information during future annual reports.
The current permit requires the City to submit an annual report for each
year. The annual report documents progress Chanhassen has made toward
measurable goals for each best management practice (BMP) listed in
permit. Input has been solicited from City departments as well as some of
the City's consultants on progress towards the City's measurable goals
listed in the SWPPP. The yearly reporting assists Chanhassen by ensuring
that annual goals set forth in the SWPPP are addressed.
HIGHLIGHTS OF PROGRESS
. Finished Surface Water Management Plan Update inventory of 6,000+
storm water structures, 400+ wetlands and 350 storm water ponds.
. Included articles relating to storm water quality in each Chanhassen
Connection since March 2003.
. Continued tracking SWPPP progress with ASIST software purchased in
2003.
. Chanhassen Residents made 5,067 visits to the Carver County
Environmental Center (333 more than 2004 and 31 % of total Carver
County resident visits)
. Recycled 850 gallons of waste oil from municipal operations (450 gallons
less than last year)
. Approximately 595 tons of debris removed from streets as a result of street
sweeping activities (2004 = 1,732 tons of debris removed).
. Located and corrected 3 illicit discharges within Chanhassen (Commerce
Drive, Market Square, West 78th & Great Plains Boulevard).
. Performed maintenance activities in storm water infrastructure that
experienced problems during late summer rain events.
NPDES Phase II MS4 Permit Annual Report
March 3, 2006
Page 3 of 3
2005 GOALS TO BE COMPLETED WITH SWMP UPDATE
. Municipal Separate Storm Sewer System Map.
. Ensure Erosion and Sediment Control meets MPCA minimums.
. Critical Construction Site BMPs to be required with permits.
. Inspections, Reports and Maintenance activities needed to keep on track
with MS4 permit.
. Ordinance Review and update if needed.
Staff plans to submit the final annual report to council for approval on a future
Council consent agenda. Staff is currently waiting for MPCA to provide the
2005 annual report format. Once the report is complete it will be submitted to
Council for approval.
RECOMMENDA TION
Staff recommends the City Council hold a public hearing to consider public
input on current City SWPPP. Staff will incorporate all comments received on
the SWPPP in the 2005 annual report to be approved on a future Council
consent agenda.
ATTACHMENTS
1. 2005 NPDES II SWPPP Highlights
G:\ENG\Lori\NPDES Phase Il\MS4 Permit\2005 Annual Report\CC 030306.doc
2005 NPDES II SWPPP Hi~
. Surface Water Management Plan Update.
o Consultant has finished collecting data (x-y-z location, size, condition) on
over 6,000 storm water structure during the SWMP update inventory.
o Discovered and addressed 2 illicit discharges during structure inspection
and inventory. (1 additional illicit discharge was discovered through other
means in 2005)
o Finished MN-RAM assessments of Chanhassen's 400+ wetlands.
o Located and inventoried over 350 storm water ponds.
. Through the continued contract with the City, Carver Soil and Water
Conservation District reviewed erosion and sediment control plans for 22
development sites and performed 100 documented construction site inspections
within these sites during the 2005 construction season. Generally 2005 had some
large construction sites that had more problems with sediment and erosion
control, especially during the large rain events in September and October.
. Included articles related to storm water quality in each Chanhassen Connection in
all 2005 issues. Articles included:
o "Top 5 Shoreland Issues"
o "Street Sweeping"
o "Clean Water Hotline"
o "Chanhassen Lake Users"
o "2004 Lake Monitoring Results"
o "Lawn Smart"
o "Water Conservation"
o "2005 Lawn Fertilizer Restrictions"
o "Lake Susan Update"
o "Managing Yard Waste"
. Continued the input of SWPPP activities into ASIST database (purchased 2003)
for NPDES II MS4 permit progress tracking.
. Inspected 1 newly installed septic systems and sent out approximately 100
reminders to property owners for the septic maintenance program.
. Inspection of 58 of 58 sump pollution control devices. Maintenance planned once
spring thaw is complete. (Currently frozen)
. Recycled 850 gallons of waste oil from municipal operations (450 gallons less
than 2004).
. 20 gallons of vehicle washing soap were used (5 gallons more than 2005).
. Chanhassen residents made 5,067 visits to Carver County Environmental Center
(333 more visits than 2004 and 31 % of total visits by Carver County residents).
. 327 Christmas Trees recycled by Boy Scouts troops (approximately 270 more
trees picked up than in 2004).
. During spring and summer street sweeping activities, the 100+ miles of
Chanhassen streets were swept yielding approximately 595 tons of sand/debris
from streets. Sweeping activities have been logged and recorded by streets
department personnel. (Down from 1,732 tons in 2004, reduction of 1,137 tons)
o 2005 sweeping activities generally were prioritized around Chanhassen
water resources first to minimize impacts to the resources.
. 27 tons of phosphorous-free fertilizer was used in municipal parks in 2005 (1 Y2
tons less than 2004). 2006 activities planned include soil sampling to assist in
determination of fertilizer needs.
. January 2005 presentations to City Council
. Spring 2005 presentations to Chaska Middle School East students.
. Maintenance of city web page
. Continued attendance at Metro Watershed Partners meetings.
G:\ENG\Don\NPDES 11\2005 NPDES II SWPPP Highlights.doc