Systems Planning

Sustainable Systems

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Sustainable Systems Goal 

Plan for and manage constructed and natural infrastructure systems to meet the current and future needs of our community

How are we doing?

Infrastructure systems within the city consist of traditional grey infrastructures, such as streets, sidewalks, and storm water​ pipes, and green infrastructures systems, such as the urban forest and rain gardens. The urban forest and storm water conveyance system help improve water quality in the community. Ann Arbor has over 540 miles of storm water conveyance system, over 23,000 inlets and catch basins, over 43,000 street trees, and over 6,000 park trees. Pavement condition on streets also relates to accessibility and transportation targets. The City is constantly working to improve the community's infrastructure, through programs like developing a pavement asset management plan, adopting an Urban and Community Forest Management Plan, and developing a ​Green Streets Policy. ​

What are the indicators?

​Tree Condition

The Urban and Community Forest Management Plan set a target to increase the average condition rating of roughly 50,000 city-managed street and park trees from fair to good. From 2009 to 2015, average tree condition increased, and the percent of city-managed trees in excellent, very good, or good condition also increased. ​

Source: City of Ann Arbor


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Impervious Surface

85% of our drinking water comes from the Huron River. The City aims to reduce the amount of impervious surface across the community to decrease the amount of runoff that drains into the Huron River and to mitigate flooding impacts.  ​​There are a total of 28 square miles of surface in Ann Arbor. Of this 28 miles, 31% of the surface is currently serviced by a detention basin.

Source: City of Ann Arbor

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Average Pavement Rating

The City set a target to increase average pavement ratings​ on city-controlled streets. The City is in the process of establishing a target level of service and creating a baseline indicator. 

​Source: City of Ann Arbor

What way cool projects are underway?

Urban and Community Fo​restry Management Plan

In 2014, City Council adopted Ann Arbor's first Urban and Community Forestry Management Plan to increase the quality and size of the urban and community forest, which is an adaptive strategy to improve water quality and limit flooding by mitigating storm water runoff. The City is undertaking several programs to maintain and improve the health and condition of trees. For example, the Citize​n Pruner program trains volunteers on how to prune young trees to develop strong structure and proper form. 

Green Streets Policy

In 2014, Ann Arbor City Council adopted a Green Stre​ets Policy that sets storm water infiltration standards for public street construction and reconstruction. ​

Storm Water Model Calibration and ​​Analysis

The Storm Water Model Calibration and Analysis Project​ (PDF) helped the City of Ann Arbor identify aspects of the City's storm water system that would benefit from improvement – and then to make data-driven, citizen-informed decisions about the best way to make these improvements.​


Where are we now?
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​Poor​Not Assessed
Where are we going?​ ​
​Getting Better​Stable
​Getting Worse​Unknown