1. Yonggil River - 2D Proposed Design

2. Water Depth

3. Froude #

4. Shear Velocity

5. Water Velocity

6. Cut and Fill Long Pro Station 915 Appx. 3400 cu. ft

7. Cut and Fill Pool - Long Pro Station 800 Fill/Cut Appx. 6,600 cu. ft

8. Cut and Fill Riffle – Long Pro Station 750 Fill Appx. 15,000 cu. Ft

9. Cut and Fill Main Pool – Long Pro Sta. 725 Fill Appx. 8,000 cu. ft

10. Cut and Fill Old Crossing Path Long Pro Sta. 665 Fill Appx. 1400 cu. ft

11. Bedrock

14. Materials River Left 60 ft. 1 level is enough Rocks Rough Estimate =60L*2H*6W=720cuft Minus rock volume River Right 100 ft. At least 2 levels in most areas Rocks Rough estimate per level =100L*1.5H*6W=900cuft Minus rock volume

15. Burritos! Coir Erosion Control Mat 90 (2@495) : Openings of 0.3" x 0.45" in the blanket. Weight: 980 g/m 2 Available in four roll sizes: 1. 3.28 ft x 83 ft = 30 sq/roll, 2. 6.56 ft x 165 ft = 120 sy/roll, 3. 9.84 ft x 156 ft = 180 sy/roll, 4. 13.1 ft x 83 ft = 120 sy/roll. Coir Erosion Control Mat 70 (5@ $262 each): Openings of 0.4" x 0.5" in the blanket. Weight: 780 g/m 2 Available in four roll sizes: 1. 3.28 ft x 83 ft = 30 sq/roll, 2. 6.56 ft x 166 ft = 120 sy/roll, 3. 9.84 ft x 166 ft = 180 sy/roll, 4. 13.1 ft x 83 ft = 120 sy/roll. *If only 1 layer we will use Mat 90 (13.1’ x 83’) 5 @ $330

16. Rock Reinforcment First Fiber Layer Second Fiber Layer Existing Tree

18. Habitat Addition of small boulders at toe Addition of pebbles with increased size variability in relatively shallow, low velocity sections to encourage spawning Addition of boulders and bank modification (eddys) in stream for bankful refuge Bank vegetation for additional shade and cover LWD in pools for macro invertebrate habitat

20. D s (mm) = Ʈ / ((ρ s - ρ)G*0.06))(1000) Ds = Diameter of Sediment Size mm Ʈ = Shear Stress (N/m 2 ) ρs = Sediment Density (2560 kg.m 3 ) ρ = Density Water (1000 kg/ m 3 ) G = Gravitational Acceleration (9.81m/s 2) 0.06 = Shields Parameter 1000mm/m Conversion Constant U =SQRT (Ʈ/ρ) UƮDs mm = 0.1112.113.17773 0.1214.415.68258 0.1316.918.40526 0.1419.621.34574 0.1522.524.50404 0.1625.627.88015 0.1728.931.47408 0.1832.435.28582 0.1936.139.31537 0.24043.56273 0.2144.148.02792 0.2248.452.71091 0.2352.957.61172

22. Spawning Area/bed material

23. Spawning Area Small boulders in pool

24. Addition of boulders of varying sizes for high flow refuge and scour prevention