Green Infrastructure is an interconnected network of: waterways, wetlands, woodlands, wildlife habitats and other natural areas; greenways, parks, open space and other conservation lands; and working farms and forests, that support native species, maintain natural ecological processes, sustain air and water resources, and contribute to the health and quality of life for communities and people.
Hubs and Corridors
The basic building blocks of a green infrastructure network are hubs and corridors.
Hubs are ecologically significant natural areas that provide habitat for plant and animal life. They may include large protected areas, such as state and regional parks that are managed for natural and recreational values; community parks and natural areas where natural features and ecological processes are protected and/or restored; and private farms and forests that remain in a predominantly open and undeveloped state. Large contiguous blocks of interior forest are an essential component of the network.
Corridors are the linear features that tie hubs together and they may include river and stream valley corridors and forested upland corridors.
Maryland Green Infrastructure
The Maryland Department of Natural Resources developed a Statewide Green Infrastructure Plan. In this system, Howard County hubs include the Patuxent River and Patapsco State Parks, the Middle Patuxent Environmental Area, David Force Park and the Gorman Natural Resource Area. Howard County corridors include major stream valleys and potential overland connecting routes.
Howard County Green Infrastructure Network
Howard County is developing a Green Infrastructure Network Plan (GI Plan) that will refine and expand on Maryland’s Green Infrastructure network to include areas of countywide ecological significance. The GI Plan will enable planners to consider important natural resources when preparing the General Plan, transportation plans, watershed plans and community plans; making decisions about zoning and development proposals; acquiring land for parks and public facilities; and obtaining agricultural, environmental and other land preservation easements.
The draft Green Infrastructure Network presents three options for the network hubs and two options for the network corridors. More information about the mapping criteria for these options is available in this handout:
Green Infrastructure Network Mapping Criteria
The draft GI Plan also presents potential tools to protect and enhance the network. More information about these tools is available in this handout:
What Does the GI Network Mean to You?
Click HERE for a PDF version of the County-wide draft Green Infrastructure Network.
Explore the interactive map of our draft network options HERE.
(Note: Click on “Help” on the toolbar at any time for instructions on navigating the mapping page.)
Public Participation
A public workshop was held on January 18, 2012. To view the workshop presentation, click HERE.
The Environmental Sustainability Board is serving as the citizen advisory committee for the GI Plan and is sponsoring this public workshop to review maps, and consider alternative scenarios and potential protection measures.
Contact Us
Please direct questions and comments to: GreenInfrastructure@howardcountymd.gov
or call Susan Overstreet, Department of Planning and Zoning: 410−313−4345
More Information
The Conservation Fund
The Conservation Fund: Green Infrastructure home page
Green Infrastructure: Smart Conservation for the 21st Century
Maryland Greenways and Greenprint
The Maryland Atlas of Greenways, Water Trails and Green Infrastructure, 2000
Maryland’s Greenprint is a program to identify Maryland’s most ecologically significant lands and to target them for preservation
Local Green Infrastructure Plans
Anne Arundel County Greenways Master Plan, 2002
Prince George’s County Green Infrastructure Functional Master Plan, 2005



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