Bull River Re-vegetation Projects
Today, the Bull River is lacking in native shrubs and trees along its river banks. Loss of riparian forest, modified hydrology and highly competitive reed canarygrass limit the natural regeneration of other species. A healthy river is lined with diverse vegetation which has varied root systems that hold streambanks intact (in addition to providing important shade, cover, forage, and habitat for many fish and wildlife species). Much of the Bull River today is bordered almost exclusively by dense mats of reed canarygrass. Once introduced in hay fields, reed canarygrass has spread extensively along the banks of the Bull River. Reed canarygrass forms a dense rhizomatous mat in the uppermost layer of soil, but does little to protect or stabilize the soil underneath. This leaves much of the exposed streambank underneath exposed and prone to erosion. Once underlying soil has been washed away with the river, large clumps of reed canarygrass often fall into the river as well.
Revegetation technique #1: Exclosures
The Lower Clark Fork Watershed Group (LCFWG), along with other partners (Green Mountain Conservation District, Montana Fish, Wildlife and Parks, the Kootenai National Forest and Avista), has implemented a large-scale re-vegetation effort along the banks of the Bull River, which are currently largely dominated by the non-native and highly competitive reed canarygrass. In order for plantings to be effective, the reed canarygrass must first be killed. This is accomplished by laying down a heavy fabric barrier over mats of reed canarygrass. This fabric, left in place for 1-2 years, will kill the grass and leave a space for other plants to establish.
After the the weed barrier has been installed, the areas are also fenced in order to protect the young plants to be planted from wildlife browse until they are established enough to withstand this pressure.
A variety of native vegetation is then planted within these enclosures, including: western red cedar, willow, alder, water birch, choke cherry, service berry, golden currant, red osier dogwood, elderberry, black hawthorn, woods rose, black cottonwood, white pine, Engelmann spruce, and western larch. They are then maintained and protected for the next 5-10 years, until they are strong enough to withstand competition from reed canarygrass and wildlife browse pressure.
Revegetation technique #2: Individual plantings
In 2017, LCFWG staff experimented with a different method with the goal of reducing implementation time and long-term maintenance costs – making re-vegetation efforts along the Bull River more appealing for small landowners and organizations. Instead of large exclosures, this technique features individual plantings, which are less likely to sustain a large amount of damage each year due to their smaller size and sturdy construction and are easier for one person to fix with a few hand tools. To implement this technique, an approximately 3’ x 3’ area was dug in the reed canary grass down to mineral soil, a native tree is planted in the center, a small square of weed suppression fabric is installed around the tree and fixed to the ground with landscaping staples, a t-post is pounded into the ground, and an 8-10’ piece of welded wire fencing is made into a hoop around the planting and fastened to the t-post.
Our goal for the Bull River
This project is anticipated to transform the Bull River’s banks into a healthy riparian area that promotes water quality and provides better habitat for native fish and wildlife. The LCFWG partners with other organizations and landowners to steward to the river – hoping to leave it in better condition than we found it.
Donate to support this effort here. Donations marked “Bull River revegetation” will directly support efforts underway to restore the Bull River.
- Volunteering in the Bull River Valley July 24, 2020
- Streamside revegetation efforts in the Bull River continue July 16, 2020
- Revegetation is an ongoing effort December 27, 2018
- Spring maintenance and planting in the Bull River June 30, 2018
- Fly Fishing Film Tour coming to the Rex April 19, 2018