Sustainable Dubuque Work SessionCopyrighted
September 7, 2021
City of Dubuque Work Session - Top # 1.
City Council Meeting
ITEM TITLE: 5:30 PM - Sustainable Dubuque Work Session
SUMMARY: Planning Services staff will update City Council on sustainability practices
as they relate to the planning department.
SUGGESTED
DISPOSITION:
ATTACHMENTS:
Description
Type
Sustainable Dubuque Quarterly Work Session Agenda- City Manager Memo
MVM Memo
Staff Memo Staff Memo
Presentation —SD Quarterly Update September 2021 Staff Memo
THE C
DUjIBQTE
Masterpiece on the Mississippi
TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: Sustainable Dubuque Quarterly Work Session Agenda
DATE: September 1, 2021
Dubuque
WAWca 914
ii
2007-2012.2013
2017*2019
Sustainable Community Coordinator Gina Bell is transmitting the agenda for the
quarterly Sustainable Dubuque Work Session.
v
Mic ael C. Van Milligen
MCVM:jh
Attachment
CC' Crenna Brumwell, City Attorney
Cori Burbach, Assistant City Manager
Gina Bell, Sustainable Community Coordinator
THE C
DUUB--&--FE
Masterpiece on the Mississippi
TO: Michael Van Milligen, City Manager
FROM: Gina Bell, Sustainable Community Coordinator
SUBJECT: Sustainable Dubuque Quarterly Work Session Agenda
DATE: August 31, 2021
Dubuque
AII•Anerin Cly
I
2007-2012.2013
2017*2019
The purpose of this memo is to set the agenda for the quarterly Sustainable Dubuque
Work Session scheduled for Tuesday September 7, 2021 at 5:30 p.m. in the City
Council Chambers. Planning Services staff will update City Council on sustainability
practices as they relate to the planning department.
A presentation will address the following topics:
1. Sustainable Subdivision Development Tools
2. Site Plan Requirements
3. Landscaping Requirements
4. Parkland Development
Thank you.
,rD-UBUQUE
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Sustainability Practices in
Subdivision and Site Development in
the City of Dubuque, IA
City Council Work Session
September 7, 2021
Wally Wernimont
Planning Services Manager
What are we going to talk about
tonight?
Unified Development Code
■ Sustainable Subdivision Development Tools
■ Site Plan Requirements
■ Landscaping Requirements
■ Parkland Development
Unifies. Development Code (UDC) is:
Updated consolidation
of zoning, subdivision,
site development and
historic preservation
regulations.
■ Sustainable design is
now what's expected;
traditional development
--is now the exception.
SUSTAINABLE SUBDIVISION
DEVELOPMENT TOOLS
• Applies to all new major subdivisions.
• A Major Subdivision is the subdividing or
consolidating of any parcel(s) that require
public or private improvements (streets,
water and/or sewer).
• Need to achieve a minimum score of 40
points from list of sustainable subdivision
development tools. BO-Points for Residential TIF
Conservation Subdivision 40
Solar Subdivision 30
Cottage Design Subdivision 30
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Property developed as conventional subdivision (left) and ocnse€vation subdivision (right)
WETLANDS i EACH U�SIDENT CAN
ACCESS 76 ACRES
CREEK' 1-ACRE L(Yf PLUS
75 ACRES OF OPEN SPACE)
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North Fork
Trails
Keymont
Court
11-12 Solar Subdivision
Solar Subdivision: A development that includes at least 70% "solar lots", which
have a minimum north -south dimension of 75 feet and a front line orientation
that is within 30 degrees of the true east -west axis.
Solar Subdivision
11-13 Cottage Design Subdivision
Cottage Design Subdivision: Development reflects traditional neighborhood
design, with smaller lots, reduced setbacks, narrower rights -of -way, smaller
building footprints, alleys and/or clustering.:Y=
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Cottage Design Subdivision
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Walking/Bike Trails
Permeable street pavement
throughout the subdivision
Complete street design throughout
the subdivision
Rain gardens required by covenant
for at least 80% of lots throughout
the subdivision
15
15
15
10
Native and regionally appropriate trees 5
and vegetation are preserved or
planted. Turf grass:5 30% of
landscaped area
Planting of trees on private property 5
Innovative infiltration or filtration 5
techniques
Parkway/Street trees
5
No curb and
gutter on
city
streets with 5
appropriate
bloswales
and
sidewalks
Light-colored concrete
5
Other best management practices 5
SITE PLAN DESIGN STANDARDS
Applies to:
■ New Development:
cleared site.
vacant or substantially
■ Redevelopment: partial clearance of 25%
or more and/or expansion of 25% or more
of building area.
The site, including parking lots, shall be
developed using two or more of the following
low -impact development tools or other best
management practices approved by the City.
Site Development: Low Impact Development Tools
Reduced lot grading: Ground -slope
reduction outside the immediate
perimeter of a building (where
foundation drainage is not a concern)
to promote stormwater infiltration
or filtration.
Check dams: Where narrow areas
and/or excessive grades force the
construction of less than ideal steep
swales, rock check dams can be
added to slow flows, minimize
erosion, and improve infiltration or
filtration.
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French drains and soak -away
pits: Rock -filled trenches that
promote rapid infiltration or
filtration.
Green roofs: Vegetated roofs that
reduce run-off, improve energy
efficiency, and create a green amenity.
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Rainwater harvesting systems: �_T j-
Cisterns and rain barrels that harvest
water from roof drains and downspouts -
for landscape watering and non -potable
uses. MW
Sidewalks and drives sloped
toward open space: A tool to
provide water for site vegetation,
which slows surface water flow,
improving infiltration. This technique
eliminates the need for curbs,
gutters, and catch basins, and the
open space slows the transport of
untreated water and associated
pollutants while reducing
construction costs.
_ �
Bioswales: Vegetated swales
with amended soil backfill and
under drains to improve infiltration.::-:
or filtration. .
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Native plantings: Use of native
` plants to reduce the need for
irrigation and reduce runoff.
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Native plants also slow runoff
1
and improve infiltration or
filtration with their deep, fibrous
' 0-----root systems.
Open water features: To reduce
runoff through evapotranspiration,
improve habitats, and create
attractive community amenities.
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Rain gardens: Landscape
depressions filled with amended,
permeable soil and native, deep-
rooted, moisture -tolerant plants to
promote infiltration or filtration.
Swales: Serpentine, vegetated drainageways
that convey water slowly and improve
infiltration or filtration.
Trees and other plantings: Landscaping to
intercept rainfall, reduce erosion, improve
infiltration or filtration, slow runoff, and reduce
peak flows.
Tree filters: Systems that divert a
portion of parking lot stormwater
from gutters into tree planters,
where water infiltrates amended
soils and surrounds plant roots.
Vegetative buffers: Bands of
native plantings that intercept
runoff from developed areas
before it reaches detention
basins or natural water courses
(for pretreatment).
LANDSCAPING REQUIREMENTS
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Site Landscaping
Single- and Two -Family dwelling 20% of lot
as permeable and uncovered containing
living material
Minimum of 20% of site for required
permeable area
Vary depending on Special Development
Area
■ Port of Dubuque
■ Historic Millwork District
■ Chaplain Schmitt Island
■ Historic Districts
■ Downtown/Old Town Neighborhood Overlay District
• Planned Unit Developments
Conceptual and Detailed Landscaping Plans
Trees & Sh.M-•
Minimum Shrub Planting
Requirement
Minimum Tree Planting
Requirement
Preservation of
Existing Trees
Street Trees
Water Management Traffic Calming Physical Health
Mental Health Economic Health Community identity Beauty
Cooler Air Cleaner Air Add Oxygen Remove Carbon Dioxide
Property Values Pedestrian Friendly
0
1-1
PARKLAND DEVELOPMENT
Recreational Open Space
■ Five Hundred (500) square feet per proposed single-family home
■ Three Hundred (300) square feet per proposed multi -family Dwelling
Unit.
■ May include waterways, detention/retention areas and ponds provided
they do not constitute more than 50% of the recreation open space.
■ Developer/Engineer of Record meets with Development Review Team
Staff and Leisure Services Staff to discuss recreation open space
requirements and location.
■ Developer is responsible to grade and seed, install utilities and other
improvements along public right-of-way which may include utility service
laterals for water and sewer.
Park Improvements
• Playground equipment
• Water fountains
• Sidewalks
• Landscaping
Installed based on funding
• Capital Improvement Program
• Residential Tax Increment Financing
Imagine Dubuque
Helps meet the following recommendations of the Comprehensive Plan:
SUSTAINABLE ENVIRONMENT
■ Continue to implement the Catfish Creek Watershed Management Plan
to protect creeks, sensitive ecological habitats, and promote
conservation -minded development.
■ Seek partnership opportunities to increase localized native plant,
pollinator habitat, and edible landscaping in public places.
COMMUNITY FACILITIES
Update the city-wide stormwater management ordinance to guide future
growth and development and to address onsite infiltration and
sustainable development practices.
For all Dubuque corridors, assess opportunities to plan and design for
complete street elements during each stage of maintenance and project
development cycle. �-�
Imagine Dubuque
LAND USE
■ Serve neighborhood needs such as education, housing and recreation equitable
while maintaining a viable, livable atmosphere and reducing environmental
impacts.
■ Integrate future neighborhoods into Dubuque via access to trails, open space,
and other recreational and educational amenities and connections to needed
good and services.
■ Integrate new development into the natural environment by protecting significant
woodland, prairie and wetland area and avoiding steep slopes.
■ Create a vibrant environment where residents can live, work and play within
waling and biking distance of their home and opportunity sites throughout the
community.
■ Preserve key environmental features and provide recreational opportunities for
all segments of the population through a variety of demanded active and passive
options.
■ Link existing and future development with open space and trail corridors.
Any Questions?
Planning Services Department
50 W. 13t" Street
Dubuque, IA 52001
Phone: (563) 589-4210
Fax: (563) 589-4221
Email: planning@cityofdubuque.org
Website: www.cityofdubuque.org