31.99 29 W AL LO W A LA KE 3 3.98 82 Minam Curve Umatilla Union County: Union USGS Quad: Minam TRS: T1N, R41E, Sections 6 and 7 OREGON EPARTMENT OF TRANSPORTATION 1:24, ISCLAIMER:.25.5.5 X:\Projects\OR82_Minam_Curve_and_Slope_Stabilization_KN\OR82_Minam_Curve_KN1747\Environmental\maps Corps No. NWP-216-549 Baker Grant Project Location OR82: Minam Curve Project Wallowa Lake Hwy No. 1 (OR 82) OOT Key Number: 1747 Federal Aid No.: S1(47) Wallowa 1 Miles 1 Kilometers 2 February 24, 217 Page 1 of 8
31.6 31.5 29.7 31.4 29.8 31.3 29.9 31.2 3 3.1 31 3.3 WALLOWA LAKE ry A a t bu Tri 3.2 3.4 3.5 82 ek iver Minam R 31.1 Squaw C re 3.9 3.8 3.7 Legend Reg5Highways Highway Tenth Mile Markers Intermittent Streams County: Union USGS Quad: Minam TRS: T1N, R41E, Sections 6 and 7 Perennial Streams rainages Topography and Water Features OR82: Minam Curve Project Wallowa Lake Hwy No. 1 (OR 82) OOT Key Number: 1747 Federal Aid No.: S1(47) OREGON EPARTMENT OF TRANSPORTATION 1:1, ISCLAIMER:.25.4 X:\Projects\OR82_Minam_Curve_and_Slope_Stabilization_KN\OR82_Minam_Curve_KN1747\Environmental\maps Corps No. NWP-216-549.5 Miles Kilometers.8 February 24, 217 Page 2 of 8
MP 31.5 MP 29.6 MP 29.7 MP 31.4 MP 29.8 MP 31.3 MP 29.9 W AL MP 3. MP 31.2 LO W A LA MP 3.1 Slope Failure at MP 3.2 KE MP 31.1 MP 3.2 MP 31. MP 3.3 Slope Buttress Area MP 3.9 MP 3.4 Minam Curve MP Realignment 3.5 ó óó ó MP 3.7 ó óó ó 82 MP 3.8 óó Abandoned Highway Alignment Legend County: Union USGS Quad: Minam TRS: T1N, R41E, Sections 6 and 7 Reg5Highways Highway Tenth Mile Markers Project Impact Areas OR82: Minam Curve Project Wallowa Lake Hwy No. 1 (OR 82) OOT Key Number: 1747 Federal Aid No.: S1(47) OREGON EPARTMENT OF TRANSPORTATION 1:1, ISCLAIMER: 125 25 1 5 75 1, 2 X:\Projects\OR82_Minam_Curve_and_Slope_Stabilization_KN\OR82_Minam_Curve_KN1747\Environmental\maps Corps No. NWP-216-549 1,25 4 1,5 1,75 2, Feet 6 Meters 8 February 24, 217 Page 3 of 8
etail of Existing and Proposed Right-of Way for OR82 Minam Curve Buttress Fill Area. OOT Right-of-Way 1N41E23 1N41EROAS Proposed Permanent Easement (3.85 acres) 1N41E6 1N41E21 1N41E7 Corps No. NWP-216-549 Page 4 of 8
Representative Cross Section etail Below Existing Back Slope Existing Slope Buttress Fill Area 5 Grid Spacing Cross Section etail Random-Placed Woody ebris Relocated Channel Channel Matting Buttress Fill Area Existing Stream Channel Low Permeability Soil Liner NOTES: Aggregate check dams w/ sediment traps @ 25 spacing installed in channel OR82: Minam Curve - Channel Relocation Corps No. NWP-216-549 Page 5 of 8
OR 82 Minam Curve Buttress Fill Area Landscape View Tributary A OR 82 Relocated Channel Extents of Buttress Fill Comparative Channel Profile Relocated Channel Tributary A Avg. Slope = 9.5% OR82: Minam Curve Correction Project Tributary A and Relocated Channel Isometric Plan and Profile Corps No. NWP-216-549 Page 6 of 8
2 Umatilla 25 Off-site Compensatory Stream Mitigation 3 25 3 Baker 45 Wallowa Minam Curve MP 3.7 3 5 35 4 Union 35 Wallowa 82 55 Lostine 4 6 65 Enterprise 7 1 Joseph 35 351 15 5 WALLOWA RIVER 17615 237 5 Cove Legend Union Reg5Highways 23 5 Highway Five Mile Markers huc_5th6th_issolve County: Wallowa 1 USGS Quad: Wallowa TRS: T1N, R42E, Section 4 237 County Off-site Stream Mitigation Vicinity Map OR 82: Minam Curve Wallowa Lake Hwy No. 1 (OR 82) OOT Key Number: 1747 Federal Aid No.: S1(47) OREGON EPARTMENT OF TRANSPORTATION File 1:36, ISCLAIMER: 2.5 5 5 1 1 15 Miles 2 Kilometers 3 May 1, 217 Corps No. NWP-216-549 Page 7 of 8
Channel A is part of a separate phase of this restoration project and is not shown on this drawing Connected to Channel A Channel Excavation (1,2 feet) Easement Boundary (fenced) Floodplain Excavation (approx..88 acres) Spring Creek Irrigation Return Channel Fish Screen County: Wallowa USGS Quad: Wallowa TRS: T1N, R42E, Section 4 Channel Project Area (Proposed Off-site Mitigation) OR82: Minam Curve Project Wallowa Lake Hwy No. 1 (OR 82) OOT Key Number: 1747 Federal Aid No.: S1(47) OREGON EPARTMENT OF TRANSPORTATION 1:1, 5 12.5 1 25 2 Feet 5 X:\Projects\OR82_Minam_Curve_and_Slope_Stabilization_KN\OR82_Minam_Curve_KN1747\Environmental\Permits\Mitigation\Mitigation Plan Corps No. NWP-216-549 ISCLAIMER: Meters 75 April 4, 217 Page 8 of 8