Coos Watershed Coos Watershed Association Association
Watershed Watershed Restoration ProjectsRestoration Projects
Restoration StrategiesRestoration Strategies
• Fish passage improvementFish passage improvement• Road-related erosion controlRoad-related erosion control• In-stream habitat enhancement In-stream habitat enhancement • Riparian area restorationRiparian area restoration• Wetland improvementWetland improvement
Palouse Creek CulvertPalouse Creek Culvert
Fish Passage ImprovementsFish Passage Improvements
• Culverts are usually barriers when:Culverts are usually barriers when:• Perched Perched • Higher sloped than the adjacent streamHigher sloped than the adjacent stream• Significantly undersizedSignificantly undersized• Blocked by a tidegateBlocked by a tidegate
Willanch East County BridgeWillanch East County BridgeFish Passage ProjectFish Passage Project Culvert was a fish barrier because:
•6” outlet drop•9% gradient (no stream substrate
for roughness)•Undersized (4-foot diameter on a
14-foot wide channel)
Fall Creek CulvertFall Creek Culvert
Fish Barrier because:• Perched 1-foot• Undersized for stream• Double culverts plug more easily
Tide GatesTide Gates
Tide gates cause fish passage problems:•During high tide•When culvert is undersized•If gates cause high velocities when open•If structure is failing
Large Stream Tide GatesLarge Stream Tide Gates
• Side-hinge designsSide-hinge designs• Open with little head Open with little head
differencedifference• Reduce velocitiesReduce velocities• Reduce period gates are openReduce period gates are open
Larson Tidegate Opening (October 10-13)
5
6
7
8
9
10
11
12
13
14
15
3790
4.75
3790
5.00
3790
5.25
3790
5.50
3790
5.75
3790
6.00
3790
6.25
3790
6.50
3790
6.75
3790
7.00
Ele
vati
on (A
rbir
ary
Dat
um, f
t.)
Tidal Elevation
Pool Elevation
Roads and SedimentRoads and Sediment
• Road erosion is caused by:Road erosion is caused by:• Undersized culverts that wash outUndersized culverts that wash out• Undersized culverts that divertUndersized culverts that divert• Excessively long ditchesExcessively long ditches• Side-cast roads that slide outSide-cast roads that slide out
Removing Abandoned Removing Abandoned RoadsRoads
•Improve fish passage•Reduce risk of stream crossing failures•Reduce chronic sediment inputs
Forest Road DecommissioningForest Road Decommissioning
•Reduce landslide risk•Improve natural drainage (flood mitigation)•Reduce unwanted trespassing
Rogers Tributary Channel ConstructionRogers Tributary Channel Construction
Rogers Tributary Channel ConstructionRogers Tributary Channel Construction
Fall Creek Wood PlacementFall Creek Wood Placement
Large wood benefits:Large wood benefits:
• Gravel depositionGravel deposition• Pool scourPool scour• Cover from Cover from
predatorspredators
Willanch CreekWillanch Creek
Wood creates slack-water Wood creates slack-water areas during high winter areas during high winter flows for juvenile salmon flows for juvenile salmon and other fishand other fish
Riparian Restoration Stream-
side Planting
Reasons for planting stream banks:
•Increase bank stability•Replace unwanted weeds•Improve habitat for birds
and wildlife•Shade streams
Packard Creek Packard Creek RiparianRiparian PlantingPlanting
• Fencing excluded cattle Fencing excluded cattle from streamfrom stream
• Roots stabilized banksRoots stabilized banks• Canopy helped shade Canopy helped shade
streamstream
Packard Creek Packard Creek RiparianRiparian PlantingPlanting
Native vegetationNative vegetationplanted in spring planted in spring
2003 2003 improved streamimproved streamtemperatures during temperatures during the second year ofthe second year ofgrowth.growth.
Packard Creek 7 Day Maximum Temperature
60.0
65.0
70.0
75.0
80.0
85.0
2003 2004
Year
Tem
p (F
) Upper Packard
Mid Packard
Conservation Conservation Reserve Reserve
EnhancementEnhancement ProgramProgram
• Pays rental money for Pays rental money for stream buffer acresstream buffer acres
• Cost-share money for Cost-share money for planting, fencing, off-planting, fencing, off-channel watering, and channel watering, and stream crossingsstream crossings
WetlandsWetlands
Appropriately managed wetlands can
provide:
Rearing habitat for juvenile salmon•Floodwater storage and retention•Bird and wildlife habitat•Natural water purification systems
• QuestionsQuestions• How to get more informationHow to get more information• How to get involvedHow to get involved