PreBidConferencePowerPoint.pdf

Newsome Creek Reach 2 Stream Habitat Improvement Design Pre-Bid Conference

April 19, 2016

Location

Objective Preparation of a channel & habitat design plan for

Stream Reach 2 Improve channel morphology & stream function Utilize as much of restored valley bottom and floodplain as feasible

Increase fish habitat within Reach 2 Stream habitat features (pool/riffle/glide), LWD

Past Implementation Phases 2011 – Reaches 5 & 4

• Selective dredge removal

• 30,000 cy

• LWD placement, construction of side channels and 2 meander bends

2012 – Reach 3

• Selective and complete dredge removal

• 14,400 cy

• LWD placement 2013-2015 – Reach 2

• Complete valley bottom dredge removal

• 113,043 cy

• Riparian planting of Reaches 5, 4, 3

• Topsoil spread on 6 acres

Adapted Floodplain Restoration Selective Dredge Removal Full Valley Bottom Removal

Floodplain Inundation Infrequent Annually

Floodplain Widths Newsome Floodplain Restoration

Reach Range of Width

Increase Average Width

Increase 4 5 - 10 7.5 3 57 - 84 37.65 2 59 - 190 109

Reach 4 Reach 2

Frequent Valley-Wide Floodplain Connectivity

Adaptive Management - LWD Original Design Structure Detail – LWD on Bend Only

Adapted Structure – LWD on Entire Channel

So What? Observed Benefits Stream Reach 5 & 4 Stream Reach 3 Increased habitat features due to LWD Increased habitat features due to LWD & floodplain interaction

Observed Benefits Stream Reach 5 & 4

Stream Reach 3 Increased side channels – physically constructed

Increased side channels – natural floodplain scour

Observed Benefits Stream Reach 5 & 4

Stream Reach 3 Localized floodplain interaction

Reach scale floodplain interaction

Spawning Gravel Recruitment

Floodplain connection now allowing for spawning gravel recruitment and sorting.

Nez Perce Tribe Hatchery Newsome Creek Spring Chinook Salmon Supplementation

92,384 juvenile (pre-smolt) released in 2015

Average of 72K pre-smolts released per year Fall release Do not tend to overwinter Survival low

Coordination on possibility of releasing some pre-smolts in restored habitat (upstream of acclimation facility)

Potential of outplanting adults within the restoration area

Pacific Lamprey Outplants 2015 outplant effort

50 adults 2015 monitoring

Juveniles located within mainstem Newsome

Collette Mine Restoration Project >3000 juvenile lamprey found in backwater pond Similar connected pond habitat in Newsome Working with crew to outplant adults near this type of rearing habitat

Beaver Expansion Using placed LWD as a foundation for building their dams

Have expanded from Reach 3 upstream to Reach 5

Increase in # of dams 3 dams to 11

Floodplain connection during low flow summer months

Creation of deep pools