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Doesn’t That Just Get Your Goat!


April 21, 2014 by John W. Carpita, PE
Category: Administration

Doesn’t That Just Get Your Goat!

Once in a while. I get a research request that appeals to my (admittedly) wry sense of humor. Many of you, I am sure, have heard of goats being used for vegetation (weed) control. Probably some of you have even contracted with goat herders for vegetation and weed removal services.

The question posed, by a small Washington city, was whether any agencies have established their own goat herds. “Does any municipality have history with goat ownership, recommendations, policies, advice? (How many to get, species, special vet needs etc.)”

So, intrepid investigator that I am, I sent the request out to a very wonderful and responsive group of city/county engineers and public works directors across the state. I couldn’t resist prefacing the request with: “I almost hesitate to send this one out, due to the high probability of goatesque jokes being generated.” So, sure enough, among the really serious responses was a smattering of whimsy:
I want to respond but don’t want to be identified. Is it acceptable to keep my comments a-nanny-mous?

John: I am looking for information on groups of goats
Duncan: Herd of Goats
John: Yeah, I have heard of goats!
Duncan: No, a goat herd
John: What do I care if a goat heard, I have no secrets to keep from a goat…. (You so invited this….)

No thoughts about grooming a herd of our own – too hard to get the city logo to stick to their sides….

But seriously folks ...

Why goats?
Well, they eat practically anything and everything and can climb on rough or steep terrain very easily. They are an environmentally benign alternative to herbicides and/or gas powered brush removal equipment, well suited for ecologically sensitive areas. A number of respondents said that their agencies had used goats for vegetation removal through companies that provide such services, but only one agency, a city, actually experimented with having their own “herd.” That city’s public works director at the time recommended: “Have a professional goat herder rent them to you. This is a feel-good program and gets good press, but requires a lot of work for the return. We found that we could easily power through any vegetation in a few hours that would take days or weeks to complete with the two goats we used.”

What’s on the menu?
Goats will eat:
Blackberries * English Ivy * Japanese Knotweed * Common Tansy * Morning Glory * Leafy Spurge * Dalmatian Toadflax * Canada Thistle * Yellowstar Thistle  * Knapweed (Diffuse, Spotted, Russian)

Keeping them off of ornamental shrubs can be a challenge, so these must be protected, for the sake of both plants and goats. Rhododendrons, particularly, are deadly to goats. Note that most goats prefer the plants listed above to grass-type plants, so you wouldn’t use a goat herd for lawn mowing or grassy detention/retention ponds.

Craig Madsen, Healing Hooves LLC, points to the importance of taking care of the goats. Madsen uses portable electric fencing that's 35 inches tall with eight wires. That keeps his goats safe, as does surveying the area for poisonous plants before he goes in. "You have to know your plants," he says, adding that he's seen some locations "where you have to keep them out of certain areas." Even with the herder’s vigilance, goats are at risk.

Ed Portnow, Earthcraft Services, related the sad tale of one site in Shoreline where a well-intentioned neighbor threw his rhododendron clippings over the fence. The entire herd was sickened and only intensive care by Ed and veterinarians kept them from dying.

Shoreline Pilot Project
The city of Shoreline, like many cities, has stormwater facilities scattered throughout the city. Some of these are surrounded by steep hillsides and otherwise inaccessible terrain. As a result, vegetation management is difficult. In 2011, Earthcraft Services and the city partnered in a pilot program to determine if the use of goats made economic and community relations sense.

Five sites were selected, with a variety of needs and conditions. An extensive community relations effort, with mailers and door-to-door visits with adjoining property owners, was made. Reaction was overwhelmingly positive. One person even emailed: “Pardon my language, but I have to put it this way: This is the #$%^ing COOLEST THING THE CITY HAS EVER DONE!!!!! You guys are brilliant! Love it!”

Physical and fiscal results were also positive. City of Shoreline Project Engineer Eric Gilmore noted in a recent presentation at the Spring APWA conference that the level of service is at least similar to brush cutting on previously maintained sites. Four out of five sites showed savings on a square foot basis. Absolute costs were similar: $22,365 (animal) vs. $23,376 (conventional) per site, but with about 30% more area maintained.

 

 2012 Annual Shoreline Pilot Program Cost per Square Foot

Service Type Treatment Area Cost per Square Foot
Animal 131,000 sq. ft. $0.17
Conventional  92,000 sq. ft. $0.25

Notes from Other Sources
Goats are not limited to Washington. A Wall Street Journal article (2010) notes that “as more homeowners, businesses and towns seek to maintain land with fewer chemicals or fossil-fuel-powered machinery, a growing number are trying goats to get rid of unwanted vegetation. Internet rivals Google Inc. and Yahoo Inc. hired herds to clear around their Northern California headquarters this year."

Craig Madsen, Healing Hooves LLC notes that in heavily vegetated Western Washington, goats will clear 1-2 acres in three days, while a herd will clear 3-6 acres in Eastern Washington in three days, all dependent on the amount of vegetation that needs to be removed. At $800 to $1,000 per day, many hire Craig’s goats to do the initial cutback and then manage the remaining weeds in other ways. He also adds that goats are good for steeper slopes and sensitive areas where heavy equipment is not feasible. “The costs are in the transportation, labor and experience of the manager,” said Madsen. “Costs also vary depending on any special complexities of the site – human and geographic.”

Agency Comments
Maple Valley (Ken Srilofung, Surface Water Management & NPDES Program Manager)  The city of Maple Valley has used goats to take of vegetation/weed including blackberry and scotch broom in the past three years. Here is the information we have posted on our website.

Columbia County (Andrew Woods, Public Works Director) We do not manage our own goat herd. However, we have contracted for levee maintenance. We have one company that we contract with through the small works roster. It has been very successful. The cost is about the same as chemical application. However, the community appreciates not applying the chemicals and the entertainment value of the goat herd cannot be measured. It turns into a mobile petting zoo a few weeks every year.

Other Resources Photo Courtesy of Earthcraft Services

MRSC is a private nonprofit organization serving local governments in Washington State. Eligible government agencies in Washington State may use our free, one-on-one Ask MRSC service to get answers to legal, policy, or financial questions.

About John W. Carpita, PE

Public Works Consultant John is MRSC’s resource for engineering design, purchasing and bidding issues, contract document preparation, construction contract issues, local improvement districts, sewer, water, storm drainage and solid waste issues, as well as resource conservation. He’s a registered professional engineer and has had a widely varied 42-year career as a consultant, county engineer, city engineer and project manager.

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