Recent or Current Projects

Little Obed Genesis Project 

This project began in the fall of 2014.  This small stream is one of the three major tributaries that feed the large wetland out of which flows the Little Obed River.  It is significantly impacted by stormwater run-off from I-40 which runs parallel with the stream for about 1000 feet before turning away.  Because of the stormwater impacts, it was a deeply incised stream in places with vertical and undercut banks up to six feet in height.  The downcutting had also exposed a 16 inch diameter high pressure gas line, a significant hazard so close to the interstate.  The project had five significant components:  remove invasive species from the riparian zone and replace with native plants, replace broken concrete at end of TDOT concrete lined drainageway and install energy dissipation structures, install a grade structure and rock cascade to put the gas line below the bottom of the stream again, remove undercut trees and regrade the undercut and vertical banks, and install cedar revetments with rock toes for bank and channel stabilization.  

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posted Feb 16, 2015, 8:37 AM by Dennis Gregg   [ updated Feb 16, 2015, 8:42 AM ]


Cumberland Mountain State Park Project

posted Feb 16, 2015, 8:35 AM by Dennis Gregg

This project began in 2013 to respond to extensive bank erosion and sedimentation which had been noted in a previous survey of the two streams, Byrds Creek and Three Mile Creek, which make up the two “arms” of the Park.  These impairments were caused by two factors:
1.  An unusual number of downed trees, particularly along Three Mile Creek which had been hit by a tornado, combined with pine bark beetle damage.
2.  Increased development upstream of the park which resulted in increased run-off from storm events.

The Project had four components:
1.  Streambank stabilization using cedar revetments
2.  Debris dam removal
3.  Installation of rock vanes
4.  Planting of newly stabilized banks

Because the project was conducted in a State Park with the highest level of environmental protection, no heavy equipment was used with the project, relying entirely on human labor, including the carrying of materials to the sites using existing trails.   Debris dams were also removed by hand by cutting logs into pieces that could be handled safely.

If each of the treatment areas is considered separately, there were a total of 105 sites, ranging from ten feet in length to eight-four feet long. There was a total of 2,155 feet of banks treated on Three Mile Creek and its main tributary out of a total of 4,028 feet of impacted stream and on Byrds Creek, 523 feet of bank were treated out of 5,500 feet of impacted stream.  A total of 507 revetments were installed.

A number of small rock barbs were installed at various points by rearranging existing streambed rocks.  Two major vanes and a smaller one were installed at one site on Byrds Creek, using about 5 ¼ tons of local quarried sandstone.

Three debris dams were removed on Three Mile Creek, six debris dams were removed on Byrds Creek.

The project was completed in the summer of 2014 with the final planting and removal of some massive logs.  On-going monitoring is occurring and some overplanting will occur in spring 2015.

Cumberland Mountain State Park Project

posted Aug 6, 2014, 8:01 PM by Dennis Gregg

Cumberland Mountain


Centennial Park

posted Aug 28, 2011, 2:05 PM by Admin   [ updated Feb 16, 2015, 8:40 AM by Dennis Gregg ]

Centennial Park Complete Project Plan


Crossville Centennial Park Project

posted 4 minutes ago by Dennis Gregg

In 2011, OWCA began a two year project to change the way that Crossville's Centennial Park handles stormwater.  This project was completed in August 2013.  Stormwater in the park flows off of both paved surfaces such as parking lots, roads, and walkways as well as off the packed turf of ball fields and mowed grass areas.  

In Centennial Park, stormwater flows downhill into three primary drainage areas. The first has a stream and wetland that feeds a pond.  The second is an intermittent stream with wetland areas along its banks.  The third is a wet weather conveyance that only has flowing water during and immediately after storm events.  Because all the water from the park and Industrial Blvd flows down these drainageways, the stream at the bottom, a part of the Little Obed system, rises very quickly during storms and puts a lot of stress on the banks.  This project employed a number of techniques to reduce that extreme impact.  The project included four rain gardens, designed to capture water before it enters the stream or these drainageways.  On two of the drainageways, structures were built within the channel to slow and spread the water without interfering with the normal flow of the water when it is not raining.  Finally, a large number of plants (over 7,200) have been added along and on the banks to increase the ability of the bank areas to absorb water so that it can be released more slowly over time.


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