Home Specialized Services Ecological Projects About Us/Contacts Resources Site Map What's New Otis Bay logo

Projects by State

Nevada

California

Hines Spring
Lower Colorado River
Walker River

Utah

Provo River

Florida

Virginia Key

Other Projects


Ecological Projects >> Pahranagat >> Black Canyon Restoration

Project:  Black Canyon Restoration

Client:  Pahranagat National Wildlife Refuge (USFWS)

Date:  January – May 2012

Site Location:   Black Canyon is located on Pahranagat National Wildlife Refuge (PNWR) and is part of the historic White River watershed approximately 70 miles north of Las Vegas, NV.

Black Canyon Channel Restoration project after construction, May 2012.
A portion of Black Canyon Channel Restoration project after construction, May 2012. (See more images below.)
Project Summary:
The Pahranagat River, which was at one time part of the pluvial White River, historically flowed through Black Canyon. Human alterations including water diversions, irrigation ditches, highway construction, and introduction of non-native, invasive plants have had detrimental effects on the landscape, including the removal of all natural flows from Black Canyon. The goal of this restoration project was to return water to Black Canyon and replace abandoned weedy fields with a native riparian corridor that can provide important nest, food, and water resources for a diversity of animals.

Otis Bay, Inc. designed and constructed a new channel and floodplain to restore hydrologic function and riparian habitat to Black Canyon. The project involved an assessment of the historical drainage system and geomorphic condition of Black Canyon; a description of the morphometry of potential channels in the drainage system; hydrologic and hydraulic analysis to address water capacity and erosion control; NEPA/ environmental impact analysis, planning, mitigation/monitoring, and documentation; and collection of baseline information which includes topographic surveys, geotechnical investigations, identification of water control structures, and an assessment of existing vegetation.

Project Update:
Otis Bay revegetated the north half of the restored channel with over 12,000 native plants in 2014.  Planting in the south half of the canyon is tentatively scheduled for fall 2014.

To experience the panoramas, videos, audio and multimedia photo galleries, you'll need the free QuickTime Player.
Black Canyon Channel Restoration project before construction, January 2012.
Black Canyon Channel Restoration project before construction, January 2012.

Black Canyon Channel Restoration project during construction, March 2012.
Black Canyon Channel Restoration project during construction, March 2012.

Black Canyon Channel Restoration project after construction, May 2012.
Black Canyon Channel Restoration project after construction, May 2012.

See the Library for additional web resources.
All content on this web site is licensed under a Creative Commons License.