Fish Passage and Hydrology

Fish Passage and Hydrology

  • 2
  • July 10, 2014
Mission Creek Watershed Fish Passage Collaboration– This project was brought to Northwest Management Inc in 2012 by the Evergreen County Highway District in Northern Idaho. The need for new infrastructure to re-establish endangered steelhead above the pictured barrier and alleviate public safety concerns of the Highway District at this crossing were the projects objectives. NMI developed a project proposal and application for cost-share funding in partnership with the Nez Perce Tribe, the Highway District and three private landowners. The project application was to the Idaho Governor’s Office of Species Conservation and we were successfully awarded funds in spring of 2013. NMI in combination with the Nez Perce Tribe completed the documentation required for federal permitting, culturally sensitive area assessment, project development. This project was completed in the fall of 2013 during low-water conditions and received outstanding comments from the Idaho Governor’s Office of Species Conservation, the Evergreen Highway District, and local residents.
Northwest Management Inc provides balanced solutions, technical staffing, and professional services to meet the management challenges facing today’s natural systems. We value the high-level results gained through collaboration and believe sustainable solutions are achieved only through effectively balancing environmental, social, and economic values. Northwest Management Inc anchors it’s success in more than 30 years of field experience throughout the western U.S., a well-established team of resource professionals, and cutting-edge technology.

Before

before1

After

after2

Project Purpose – Restore anadromous fish passage and stream ecosystem connectivity to the upper Mission Creek watershed within the Nez Perce Indian Reservation on private land in Lewis County, Idaho.
map3
4
Surveys for steelhead and rainbow trout as well as site exclusion-netting were performed by the Nez Perce Tribe with participation from local landowners and NMI staff.
5
Following removal of the existing culvert barrier, stream banks were shaped to accommodate the stream energy of high spring runoff and the development of riffle to pool habitat.
6
Placing geotextile fabric below the 100-year high water mark before installation of channel armament further stabilizes the stream banks and bridge abutments also minimizing sediment input to the stream following construction.
7
The use of boulders 3-4 feet in diameter for stream riprap helps to dissipate steam energy, create turbulent and backwater habitat for juvenile fish and protect the road-crossing infrastructure resulting in a “zero” maintenance fish-friendly upgrade from the previous structure.
9
The placement of pre-cast concrete sills for the bridge allowed us to minimize disturbance and alleviate potential water quality concerns associated with forming concrete near water.
10
11
Using a large crane to place the three bridge sections (Big R Bridge) allowed NMI to work from the road surface and minimize soil erosion and vegetation disturbance.
12
13
14
15
Five-foot tall cattle panels and forest-restoration “tree-tubes” were used to protect the planted hawthron, aspen and pine from wildlife browse. The enclosures are commonly left in place for 3 to 5 years then removed as the vegetation reaches a high beyond wildlife browse.
16
17
The success of this project can be attributed to the hard work of many and the dedication of NMI to improve the natural environment we live in, through “providing a balanced approach to natural resource management”.
Northwest Management Inc provides balanced solutions, technical staffing, and professional services to meet the management challenges facing today’s natural systems. We value the high-level results gained through collaboration and believe sustainable solutions are achieved only through effectively balancing environmental, social, and economic values. Northwest Management Inc provides services backed by more than 30 years of field experience throughout the western U.S., a well-established team of resource professionals, and cutting-edge technology to achieve the desired results on your property.
Contact A Water Resource Professional Today