Hammon Bar Riparian Enhancement Project

The Hammon Bar Riparian Enhancement Project is designed to test the methods and resulting habitat benefits of planting large cuttings of cottonwood and willow trees. Expected outcomes include increased riparian canopy on the floodplain, increased deposition of fine sediment and organic material, hydraulic cover and rearing habitat for juvenile salmonids, and increased local production of large woody material .

U.S. Fish and Wildlife Service$465,000Complete
CalTransMatch funding for interpretive facilities at Hammon Grove ParkComplete
Western Aggregates$50,000 "challenge grant" for matching federal dollarsComplete
PG&E Narrows Mitigation Fund$65,000 for implementationComplete
Bella Vista FoundationTwo small grants to fund planning and future application of resultsComplete
The Long Foundation$36,000 for signs and trailsIn Progress
Time frame: 
Wednesday, October 8, 2008 to Monday, September 30, 2013
Post-project monitoring
Project participants: 
SYRCLProject organizer
M&M ReforesationContractor for harvesting and planting
Chris Bowles Environmental ConsultingTechnical contractor for project design and groundwater monitoring
U.S. Fish and Wildlife ServiceFunder
Western AggregatesDonor
Teichert AggregatesDonor
Bureau of Land ManagementLandowner
POINT (-121.399773 39.223917)
Habitat type: 
Riparian zone
Land ownership: 
Bureau of Land Management

Increase availability of large woody riparian structure for enhanced fisheries habitat. Evaluate pole-planting methods for riparian enhancement on the Lower Yuba River.

Species targeted for protection: 
Common NameScientific Name
Chinook SalmonOncorhynchus tshawytscha
Steelhead TroutOncorhynchus mykiss
Species targeted for eradication: 
Common NameScientific Name
Species introduced during restoration: 
Scientific NameCommon Name
Goodings WillowSalix gooddingii
Arroyo WillowSalix lasiolepis
Red WillowSalis laevigata
Fremont CottonwoodPopulus fremontii
Project methods: 

Cutting Harvest Method: crews harvested from donor trees flagged with color coded tape indicating species. Poles were 7-12 feet long. Excavator Planting Method: planted "pods" received a total of 12 poles comprised of 6 cottonwood, 2 red willow, 2 goodings willow, and 2 arroyo willow. A medium size excavator was used to dig pods. Stinger Planting Method: prior to stinger planting, the depth to groundwater was surveyed with a laser level and contour lines were painted at 1-2 foot intervals. It was possible to listen and feel for water as poles were being put in hollow planting cylinder of Stinger.

Post-project monitoring: 
Each planting area was monitored by a trained monitor. Each monitor used a map of their planting area to monitor and record data per pod in numerical order. Starting with the tagged cutting, monitors moved clockwise around each pod and recorded planting area, pod number, species identification, and individual cutting survivorship. If alive, the monitor recorded flower growth, deer/beaver herbivory, insect damage affecting 30% or greater of the individual, and signs of stress or disease. New growth was measured and recorded in the March monitoring event only because observing new growth in subsequent sampling events was too difficult.
Contact info: 

Gary Reedy, River Science Director 313 Railroad Ave, Nevada City, 95959 (530) 265-5961 ext.208 gary@syrcl.org

Datasets and reports available to download: