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Transmission Vegetation Management
 

Transmission Vegetation Management

Ameren Transmission
Transmission Vegetation Management
Your electricity is available on demand because of the bulk electric transportation system that routes power from generating facilities to homes and businesses. The workhorses of this system are the high-voltage transmission poles, towers and lines that span thousands of miles, linking the nation’s electrical system. New federal reliability requirements state that electrical utilities must establish a vegetation management program to ensure safety and reliability.
 
Why Control Vegetation On Transmission Rights-of-Way?
Safety and reliability are the driving factors behind why Ameren manages trees, and other forms of vegetation, around our transmission lines. This vegetation management work may include mowing, manual and aerial trimming, removal of vegetation and the application of environmentally safe herbicides. The Vegetation Management program is managed by the Ameren Transmission supervisors, who are certified arborists through the International Society of Arboriculture.
 
Maintaining Adequate Clearance And Accessibility
Trees, and other vegetation growing around transmission lines, hinder our ability to safely and reliably deliver electric service. They make the job of restoration more difficult, extend restoration times and pose additional hazards to line crews.
 
Because transmission lines are extremely important to the power grid, they are inspected on an annual basis. Dense stands of trees, shrubs or hedges can limit access to the right-of-way needed to perform necessary inspections or maintenance. 
 
For an inspection of your tree and line situation, call:

Illinois:     800.755.5000
Missouri:  800.552.7583
  
Code TMT - Ameren Transmission Vegetation Management - Contact Us
  
DISCLAIMER:
Any permission for plantings (including, but not limited to, maximum heights, clearances, and buffer zones) on this website are subject to change without notice and from time to time by Ameren Corporation or any of its subsidiaries. Current and future rules, regulations and orders of federal and state authorities may restrict or prohibit plantings, or may require changes to plantings, without notice and from time to time. Ameren reserves the right to require trimming or removal, at Ameren’s sole discretion, of any plantings previously permitted, whether under this brochure or otherwise. No rights to maintain any planting will result from reliance on this brochure or any other authorization of Ameren Corporation or its subsidiaries.

Managing Trees Near Transmission Lines

Ameren continually manages vegetation on its transmission rights-of-way to provide safe, reliable electrical service while maintaining, and, where possible, improving wildlife habitat within the rights-of-way.

The Zoned Approach
Ameren takes a "zoned" approach to managing vegetation both under and to the sides of high voltage transmission wires along our transmission rights-of-way.

Wire Zone
The zone directly beneath and 20 feet beyond the wires is called the "wire zone." It is managed to encourage low growing plant species with a mature height of 10 feet or less. If the wire is less than 30 feet off the ground when loaded, the zone should be maintained as grass.
 
Border Zone
The border zone, when present, is an area from the wire zone to the edge of a maintained right-of-way or easement. In general, this area is limited to plant species that have a mature height of less than 20 feet. Any tall-growing trees or vegetation in the border zone will be managed to obtain appropriate clearances.

Clearing Around Structures (view diagram)
To ensure safety and reliability, plant species within 10 feet of any transmission structure/tower base or guy wire will be removed. From 10 feet to 20 feet around the structure/tower base or guy wire, plant species that normally reach a mature height greater than 3 feet will be removed. Exceptions will be made for annual crops such as corn, soybean, rye, winter wheat and wildlife food plots.

For an inspection of your tree and line situation, call:

Illinois:     800.755.5000
Missouri: 800.552.7583
  
Reference Code TMT - Contact Us
  
DISCLAIMER:
Any permission for plantings (including, but not limited to, maximum heights, clearances, and buffer zones) on this website are subject to change without notice and from time to time by Ameren Corporation or any of its subsidiaries. Current and future rules, regulations and orders of federal and state authorities may restrict or prohibit plantings, or may require changes to plantings, without notice and from time to time. Ameren reserves the right to require trimming or removal, at Ameren’s sole discretion, of any plantings previously permitted, whether under this brochure or otherwise. No rights to maintain any planting will result from reliance on this brochure or any other authorization of Ameren Corporation or its subsidiaries.

Federal Reliability Requirements

Ameren’s Approach to the Federal Reliability Requirements
In 2007 the Federal Energy Regulatory Commission (FERC) began mandating legally enforceable reliability requirements necessary to protect the transmission grid from disturbances. In response to these requirements, Ameren has adopted a proactive approach to right-of-way management. 
 
This involves:
  • Establishing greater clearances between trees and transmission lines.
  • Cutting incompatible trees down where the same trees had been trimmed in the past.
  • Asking landowners to move newly planted trees inappropriate for the location.
 
For an inspection of your tree and line situation, call:

Illinois:     800.755.5000
Missouri: 800.552.7583
  
Reference Code TMT - Contact Us
  
DISCLAIMER:
Any permission for plantings (including, but not limited to, maximum heights, clearances, and buffer zones) on this website are subject to change without notice and from time to time by Ameren Corporation or any of its subsidiaries. Current and future rules, regulations and orders of federal and state authorities may restrict or prohibit plantings, or may require changes to plantings, without notice and from time to time. Ameren reserves the right to require trimming or removal, at Ameren’s sole discretion, of any plantings previously permitted, whether under this brochure or otherwise. No rights to maintain any planting will result from reliance on this brochure or any other authorization of Ameren Corporation or its subsidiaries.

Who Prunes? We Do

Why Can’t Landowners Prune Trees Within The Right-Of-Way or Easement?
While it might seem logical, there are good reasons why this cannot be permitted. Under some conditions, trees that grow too closely to transmission lines can conduct electricity. Contact is not necessary for electricity to arc or “jump” from transmission lines to trees. If electricity flows through a tree, anyone in the area of the energized tree could experience serious injuries or even loss of life.
 
This is why federal requirements specify that only qualified line-clearance tree contractors are allowed to work within 20 feet 5 inches of our higher voltage lines.
 
Never prune vegetation near power lines!
 
For an inspection of your tree and line situation, call:

Illinois:     800.755.5000
Missouri: 800.552.7583
  
Reference Code TMT - Contact Us
  
DISCLAIMER:
Any permission for plantings (including, but not limited to, maximum heights, clearances, and buffer zones) on this website are subject to change without notice and from time to time by Ameren Corporation or any of its subsidiaries. Current and future rules, regulations and orders of federal and state authorities may restrict or prohibit plantings, or may require changes to plantings, without notice and from time to time. Ameren reserves the right to require trimming or removal, at Ameren’s sole discretion, of any plantings previously permitted, whether under this brochure or otherwise. No rights to maintain any planting will result from reliance on this brochure or any other authorization of Ameren Corporation or its subsidiaries.

Easement Agreements

What Is An Easement Agreement or Right-Of-Way?
When building new lines, Ameren typically acquires easements for transmission rights-of-way. An easement is a permanent, legal right to use the property of a landowner for a specific purpose. The easement width is based on the voltage of the line - the higher the voltage, the wider the easement - typically easements are 100 to 150 feet wide, but they can be larger.
 
Easements typically give Ameren the right to build, operate and maintain a transmission line. Tree trimming and brush removal is an important part of transmission maintenance. Compensation is made to landowners at the time the easement is initially acquired, and the terms of the easement remain in place as property is transferred, or sold, to new owners.
 
For an inspection of your tree and line situation, call:

Illinois:     800.755.5000
Missouri: 800.552.7583
  
Reference Code TMT - Contact Us
  
DISCLAIMER:
Any permission for plantings (including, but not limited to, maximum heights, clearances, and buffer zones) on this website are subject to change without notice and from time to time by Ameren Corporation or any of its subsidiaries. Current and future rules, regulations and orders of federal and state authorities may restrict or prohibit plantings, or may require changes to plantings, without notice and from time to time. Ameren reserves the right to require trimming or removal, at Ameren’s sole discretion, of any plantings previously permitted, whether under this brochure or otherwise. No rights to maintain any planting will result from reliance on this brochure or any other authorization of Ameren Corporation or its subsidiaries.

Establishing Forbs and Grasses In Transmission Zones

Grasses and Forbs
Enhancing Transmission Zones
It’s important that no structures or tall vegetation be placed on the right-of-way. However, you can still beautify the area through the planting of forbs (herbaceous flowering plants), wild grasses and other low-growing vegetation.

Hints For Planting
Below are some recommendations to enhance the flora of the transmission zone, create natural habitat for wildlife, and at the same time, allow us to inspect and maintain the transmission lines.
 
Recommended Grasses And Forbs
  

Forbs
Beardtongue
Blackeyed Susan
Butterfly Milkweed
Common Milkweed
Culvers Root
False Sunflower
Foxglove
Greyheaded Coneflower
Illinois Bundleflower
Lanceleaf Coreopsis
Ohio Spiderwort
Partridge Pea
Purple Coneflower
Purple Prairie Clover
Wild Bergamot
  Native Warm Season Grass
Big Bluestem
Indiangrass 
Little Bluestem
Prairie Dropseed
Sideoats Grama
Switchgrass



       

For an inspection of your tree and line situation, call:

Illinois:     800.755.5000
Missouri: 800.552.7583
  
Reference Code TMT - Contact Us
  
DISCLAIMER:
Any permission for plantings (including, but not limited to, maximum heights, clearances, and buffer zones) on this website are subject to change without notice and from time to time by Ameren Corporation or any of its subsidiaries. Current and future rules, regulations and orders of federal and state authorities may restrict or prohibit plantings, or may require changes to plantings, without notice and from time to time. Ameren reserves the right to require trimming or removal, at Ameren’s sole discretion, of any plantings previously permitted, whether under this brochure or otherwise. No rights to maintain any planting will result from reliance on this brochure or any other authorization of Ameren Corporation or its subsidiaries.

Our Partnerships

Tree Line USA
Ameren is affiliated with The Arbor Day Foundation’s Tree Line USA for community tree plantings and public education on trees, power lines and utility safety.

Tree Line USA
The Arbor Day Foundation, in cooperation with the National Association of State Foresters, has recognized Ameren for demonstrating practices that protect and enhance our urban forests.
 
The Tree Line USA® program seeks to promote best practices in utility arboriculture and public education through five core standards: quality tree care, annual worker training, tree planting and public education, Participation in a Tree-Based Energy Conservation Program and participation in Arbor Day Celebration. More at Tree Line USA.
 
Pheasants Forever 
We are excited to be partners with Pheasants Forever. Pheasants Forever is dedicated to the conservation of pheasants, quail and other wildlife through habitat improvements, public awareness, education and land management policies and programs. We are integrating wildlife management activities into our land management programs. More at Pheasants Forever.   
   
For an inspection of your tree and line situation, call:

Illinois:     800.755.5000
Missouri: 800.552.7583
Pheasants Forever Logo
Wildlife & Pollinator Habitat Partner
    
Reference Code TMT - Contact Us
  
DISCLAIMER:
Any permission for plantings (including, but not limited to, maximum heights, clearances, and buffer zones) on this website are subject to change without notice and from time to time by Ameren Corporation or any of its subsidiaries. Current and future rules, regulations and orders of federal and state authorities may restrict or prohibit plantings, or may require changes to plantings, without notice and from time to time. Ameren reserves the right to require trimming or removal, at Ameren’s sole discretion, of any plantings previously permitted, whether under this brochure or otherwise. No rights to maintain any planting will result from reliance on this brochure or any other authorization of Ameren Corporation or its subsidiaries.

Organizations and resources for tree planting and maintenance

General Tree Planting Information

Ameren’s Transmission Vegetation Management Program
For more information about , please contact us at:

Missouri - 800.552.7583

Illinois - 800.755.5000

Call Before You Dig!
Although transmission lines are not typically underground, homeowners who plan on digging anywhere should contact:

In lllinois
Julie One-Call System - 811 or 800.892.0123

In Missouri
Missouri One Call System - 800.344.7483 (800.DIG.RITE)

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