Appendix - Phase 1 Fish Passage Assessment Data and Photos

Location and Stream Data
Crossing Characteristics –
Date 2025-09-23 Crossing Sub Type Round Culvert
PSCIS ID 6559 Diameter (m) 0.9
External ID – Length (m) 24
Crew AI Embedded No
UTM Zone 10 Depth Embedded (m) –
Easting 489950 Resemble Channel –
Northing 6112363 Backwatered No
Stream Tributary To Williston Reservoir Percent Backwatered –
Road Finlay Community Connector Fill Depth (m) 2.5
Road Tenure Sekani R01883 83 Outlet Drop (m) 1.1
Channel Width (m) 1 Outlet Pool Depth (m) 0
Stream Slope (%) 1.5 Inlet Drop No
Beaver Activity Yes Slope (%) 9
Habitat Value Low Valley Fill Deep Fill
Final score 36 Barrier Result Barrier
Fix type Replace Structure with Streambed Simulation CBS Fix Span / Diameter 3
Comments: Wetland upstream. Stream was not flowing at time of assessment. Small channel downstream. Beaver grate devices on inlet and outlet
Photos: PSCIS ID 6559. From top left clockwise: Road/Site Card, Barrel, Outlet, Downstream, Upstream, Inlet.





Location and Stream Data
Crossing Characteristics –
Date 2025-09-22 Crossing Sub Type Round Culvert
PSCIS ID 203597 Diameter (m) 0.8
External ID 15201563 Length (m) 19
Crew AI Embedded No
UTM Zone 10 Depth Embedded (m) –
Easting 425959 Resemble Channel –
Northing 6122703 Backwatered No
Stream Tributary To Nation River Percent Backwatered –
Road Thut 15000 Fill Depth (m) 1.5
Road Tenure Sekani R07214 8 Outlet Drop (m) 0.25
Channel Width (m) 2.5 Outlet Pool Depth (m) 0.5
Stream Slope (%) 2.5 Inlet Drop Yes
Beaver Activity No Slope (%) 1
Habitat Value High Valley Fill Deep Fill
Final score 29 Barrier Result Barrier
Fix type Replace with New Open Bottom Structure Fix Span / Diameter 15
Comments: High-quality stream with abundant gravels and cover, directly connected to the Nation River. Bull trout noted near the confluence. eDNA samples collected upstream and downstream of the crossing. This crossing is located on a road identified by BCTS as a candidate for potential deactivation.
Photos: PSCIS ID 203597. From top left clockwise: Road/Site Card, Barrel, Outlet, Downstream, Upstream, Inlet.





Location and Stream Data
Crossing Characteristics –
Date 2025-09-22 Crossing Sub Type Round Culvert
PSCIS ID 203598 Diameter (m) 0.8
External ID 15201146 Length (m) 10
Crew AI Embedded No
UTM Zone 10 Depth Embedded (m) –
Easting 426678 Resemble Channel –
Northing 6123035 Backwatered No
Stream Tributary To Nation River Percent Backwatered –
Road Thut 15000 Fill Depth (m) 1.5
Road Tenure Sekani R07214 22 Outlet Drop (m) 0.2
Channel Width (m) 1.6 Outlet Pool Depth (m) 0.1
Stream Slope (%) 3.4 Inlet Drop No
Beaver Activity No Slope (%) 2
Habitat Value Medium Valley Fill Deep Fill
Final score 26 Barrier Result Barrier
Fix type Replace Structure with Streambed Simulation CBS Fix Span / Diameter 3
Comments: Small stream with short channel length before entering a large wetland area. Pockets of small gravel were present throughout. This crossing is located on a road identified by BCTS as a candidate for potential deactivation.
Photos: PSCIS ID 203598. From top left clockwise: Road/Site Card, Barrel, Outlet, Downstream, Upstream, Inlet.





Location and Stream Data
Crossing Characteristics –
Date 2025-09-22 Crossing Sub Type Round Culvert
PSCIS ID 203599 Diameter (m) 2.3
External ID 15202249 Length (m) 21
Crew AI Embedded No
UTM Zone 10 Depth Embedded (m) –
Easting 429213 Resemble Channel –
Northing 6126036 Backwatered No
Stream Tributary To Nation River Percent Backwatered –
Road Thut 14000 Fill Depth (m) 1.2
Road Tenure MoF Outlet Drop (m) 0
Channel Width (m) 3 Outlet Pool Depth (m) 0.4
Stream Slope (%) 1.5 Inlet Drop No
Beaver Activity No Slope (%) 2
Habitat Value Medium Valley Fill Deep Fill
Final score 24 Barrier Result Barrier
Fix type Replace with New Open Bottom Structure Fix Span / Diameter 15
Comments: Wetland type habitat downstream with good habitat upstream with pockets of gravel and a wide channel. Culverts beginning to sag in the middle. No outlet drop.
Photos: PSCIS ID 203599. From top left clockwise: Road/Site Card, Barrel, Outlet, Downstream, Upstream, Inlet.





Location and Stream Data
Crossing Characteristics –
Date 2025-09-22 Crossing Sub Type Round Culvert
PSCIS ID 203600 Diameter (m) 2.35
External ID 15200985 Length (m) 15
Crew AI Embedded No
UTM Zone 10 Depth Embedded (m) –
Easting 458498 Resemble Channel –
Northing 6137654 Backwatered No
Stream Tributary To Nation River Percent Backwatered –
Road Finlay-Nation FSR Fill Depth (m) 2
Road Tenure Sekani R09952 1 Outlet Drop (m) 0.15
Channel Width (m) 4.1 Outlet Pool Depth (m) 0.1
Stream Slope (%) 6 Inlet Drop Yes
Beaver Activity No Slope (%) 4
Habitat Value High Valley Fill Deep Fill
Final score 34 Barrier Result Barrier
Fix type Replace with New Open Bottom Structure Fix Span / Diameter 15
Comments: Large stream with abundant woody debris, pools, and gravels upstream. Outlet dropped minimally onto a boulder.
Photos: PSCIS ID 203600. From top left clockwise: Road/Site Card, Barrel, Outlet, Downstream, Upstream, Inlet.





Location and Stream Data
Crossing Characteristics –
Date 2025-09-22 Crossing Sub Type Round Culvert
PSCIS ID 203601 Diameter (m) 2.1
External ID 15201007 Length (m) 15
Crew AI Embedded No
UTM Zone 10 Depth Embedded (m) –
Easting 459772 Resemble Channel –
Northing 6140076 Backwatered No
Stream Tributary To Nation River Percent Backwatered –
Road Finlay-Nation FSR Fill Depth (m) 1.3
Road Tenure Sekani R09952 1 Outlet Drop (m) 0
Channel Width (m) 3.5 Outlet Pool Depth (m) 0.1
Stream Slope (%) 4 Inlet Drop No
Beaver Activity No Slope (%) 1
Habitat Value High Valley Fill Deep Fill
Final score 24 Barrier Result Barrier
Fix type Replace with New Open Bottom Structure Fix Span / Diameter 15
Comments: Large stream with pools and gravels present upstream. Significant amounts of road fill had been graded into the channel.
Photos: PSCIS ID 203601. From top left clockwise: Road/Site Card, Barrel, Outlet, Downstream, Upstream, Inlet.





Location and Stream Data
Crossing Characteristics –
Date 2025-09-23 Crossing Sub Type Round Culvert
PSCIS ID 203602 Diameter (m) 1.55
External ID 15201006 Length (m) 23
Crew AI Embedded No
UTM Zone 10 Depth Embedded (m) –
Easting 466124 Resemble Channel –
Northing 6147887 Backwatered No
Stream Tributary To Nation River Percent Backwatered –
Road Finlay-Nation FSR Fill Depth (m) 3.5
Road Tenure Sekani R01884 61 Outlet Drop (m) 0.25
Channel Width (m) 3.4 Outlet Pool Depth (m) 0.1
Stream Slope (%) 4 Inlet Drop No
Beaver Activity No Slope (%) 5.5
Habitat Value High Valley Fill Deep Fill
Final score 34 Barrier Result Barrier
Fix type Replace with New Open Bottom Structure Fix Span / Diameter 16.5
Comments: Large, low gradient, high value system. Significant amounts of road fill is eroding from the road prism into the stream on both sides of the FSR. Habitat confirmation and electrofishing or EDNA sampling is recommended.
Photos: PSCIS ID 203602. From top left clockwise: Road/Site Card, Barrel, Outlet, Downstream, Upstream, Inlet.





Location and Stream Data
Crossing Characteristics –
Date 2025-09-23 Crossing Sub Type Oval Culvert
PSCIS ID 203603 Diameter (m) 5.8
External ID 16400714 Length (m) 30
Crew AI Embedded No
UTM Zone 10 Depth Embedded (m) –
Easting 469020 Resemble Channel –
Northing 6148916 Backwatered No
Stream Tributary To Williston Reservoir Percent Backwatered –
Road Finlay-Nation FSR Fill Depth (m) 2
Road Tenure MoF Outlet Drop (m) 0
Channel Width (m) 7.4 Outlet Pool Depth (m) 0.1
Stream Slope (%) 1.5 Inlet Drop No
Beaver Activity Yes Slope (%) 2
Habitat Value High Valley Fill Deep Fill
Final score 24 Barrier Result Barrier
Fix type Replace with New Open Bottom Structure Fix Span / Diameter 15
Comments: Very large stream with 2.5m high beaver dam located in the middle of the culvert backing up a massive wetland upstream. First passage is definitely hindered by the beaver dam however, the wetland it creates provides likely stable hydrology for the downstream system.
Photos: PSCIS ID 203603. From top left clockwise: Road/Site Card, Barrel, Outlet, Downstream, Upstream, Inlet.





Location and Stream Data
Crossing Characteristics –
Date 2025-09-23 Crossing Sub Type Round Culvert
PSCIS ID 203604 Diameter (m) 1
External ID 16401990 Length (m) 50
Crew AI Embedded No
UTM Zone 10 Depth Embedded (m) –
Easting 480204 Resemble Channel –
Northing 6138985 Backwatered No
Stream Tributary To Williston Reservoir Percent Backwatered –
Road Finlay FSR Fill Depth (m) 7
Road Tenure Sekani R10040 25 Outlet Drop (m) 0
Channel Width (m) 10 Outlet Pool Depth (m) 1.5
Stream Slope (%) 0.5 Inlet Drop No
Beaver Activity Yes Slope (%) 3
Habitat Value Medium Valley Fill Deep Fill
Final score 32 Barrier Result Barrier
Fix type Replace with New Open Bottom Structure Fix Span / Diameter 27
Comments: Very large system with extremely undersized pipe that is submerged at the inlet with obvious beaver activity within the pipe itself. Upstream is a huge wetland, beaver-influenced area. Culvert slope estimated as the outlet pool is extremely deep.
Photos: PSCIS ID 203604. From top left clockwise: Road/Site Card, Barrel, Outlet, Downstream, Upstream, Inlet.





Location and Stream Data
Crossing Characteristics –
Date 2025-09-23 Crossing Sub Type Round Culvert
PSCIS ID 203605 Diameter (m) 3.9
External ID 16401519 Length (m) 46
Crew AI Embedded No
UTM Zone 10 Depth Embedded (m) –
Easting 486504 Resemble Channel –
Northing 6124990 Backwatered No
Stream Tributary To Williston Reservoir Percent Backwatered –
Road Finlay FSR Fill Depth (m) 2.5
Road Tenure MoF Outlet Drop (m) 0.95
Channel Width (m) 6 Outlet Pool Depth (m) 0.5
Stream Slope (%) 2 Inlet Drop No
Beaver Activity No Slope (%) 2
Habitat Value High Valley Fill Deep Fill
Final score 37 Barrier Result Barrier
Fix type Replace with New Open Bottom Structure Fix Span / Diameter 15
Comments: High value habitat on very large system with pipe that has large outlet drop near 1m. Habitat confirmation and eDNA sampling conducted upstream and downstream of the crossing.
Photos: PSCIS ID 203605. From top left clockwise: Road/Site Card, Barrel, Outlet, Downstream, Upstream, Inlet.





Location and Stream Data
Crossing Characteristics –
Date 2025-09-23 Crossing Sub Type Oval Culvert
PSCIS ID 203606 Diameter (m) 4.6
External ID 16401529 Length (m) 35
Crew AI Embedded No
UTM Zone 10 Depth Embedded (m) –
Easting 486441 Resemble Channel –
Northing 6119999 Backwatered No
Stream Scovil Creek Percent Backwatered –
Road Finlay FSR Fill Depth (m) 3
Road Tenure MoF Outlet Drop (m) 0.2
Channel Width (m) 9.3 Outlet Pool Depth (m) 0.7
Stream Slope (%) 2 Inlet Drop No
Beaver Activity No Slope (%) 2
Habitat Value High Valley Fill Deep Fill
Final score 32 Barrier Result Barrier
Fix type Replace with New Open Bottom Structure Fix Span / Diameter 15
Comments: Huge stream with abundant gravels and low gradient complex habitat upstream. Smaller outlet drop however pipe is somewhat undersized for the watershed.
Photos: PSCIS ID 203606. From top left clockwise: Road/Site Card, Barrel, Outlet, Downstream, Upstream, Inlet.





Location and Stream Data
Crossing Characteristics –
Date 2025-09-23 Crossing Sub Type Round Culvert
PSCIS ID 203607 Diameter (m) 1.65
External ID 16400428 Length (m) 16
Crew AI Embedded No
UTM Zone 10 Depth Embedded (m) –
Easting 488459 Resemble Channel –
Northing 6112370 Backwatered No
Stream Tributary To Williston Reservoir Percent Backwatered –
Road Finl 19000 Fill Depth (m) 2
Road Tenure BCTS Outlet Drop (m) 0
Channel Width (m) 1.5 Outlet Pool Depth (m) 0
Stream Slope (%) 1.5 Inlet Drop Yes
Beaver Activity No Slope (%) 2.5
Habitat Value Low Valley Fill Deep Fill
Final score 18 Barrier Result Potential
Fix type Replace Structure with Streambed Simulation CBS Fix Span / Diameter 3
Comments: Dry, poorly defined channel. Unlikely fish habitat.
Photos: PSCIS ID 203607. From top left clockwise: Road/Site Card, Barrel, Outlet, Downstream, Upstream, Inlet.





Location and Stream Data
Crossing Characteristics –
Date 2025-09-23 Crossing Sub Type Round Culvert
PSCIS ID 203608 Diameter (m) 2.6
External ID 16491533 Length (m) 35
Crew AI Embedded No
UTM Zone 10 Depth Embedded (m) –
Easting 479612 Resemble Channel –
Northing 6141425 Backwatered Yes
Stream Dastaiga Creek Percent Backwatered 50
Road Finlay FSR Fill Depth (m) 1.6
Road Tenure Sekani R01886 140 Outlet Drop (m) 0
Channel Width (m) 8 Outlet Pool Depth (m) 0.25
Stream Slope (%) 3 Inlet Drop Yes
Beaver Activity Yes Slope (%) 1.5
Habitat Value Medium Valley Fill Deep Fill
Final score 27 Barrier Result Barrier
Fix type Replace with New Open Bottom Structure Fix Span / Diameter 15
Comments: Very large stream with a beaver dam located 30m upstream of the crossing. No outlet drop, but culvert is well undersized for the watershed. Stream width and gradient are rough estimates.
Photos: PSCIS ID 203608. From top left clockwise: Road/Site Card, Barrel, Outlet, Downstream, Upstream, Inlet.





Location and Stream Data
Crossing Characteristics –
Date 2025-09-23 Crossing Sub Type Round Culvert
PSCIS ID 203609 Diameter (m) 3.5
External ID 16401530 Length (m) 30
Crew AI Embedded Yes
UTM Zone 10 Depth Embedded (m) 0.27
Easting 486707 Resemble Channel Yes
Northing 6116611 Backwatered No
Stream Tributary To Williston Reservoir Percent Backwatered –
Road Finlay FSR Fill Depth (m) 3
Road Tenure Sekani R06855 33 Outlet Drop (m) 0
Channel Width (m) 3.7 Outlet Pool Depth (m) 0.03
Stream Slope (%) 1 Inlet Drop No
Beaver Activity No Slope (%) 0.5
Habitat Value High Valley Fill Deep Fill
Final score 14 Barrier Result Passable
Fix type – Fix Span / Diameter –
Comments: Low gradient, larger system with abundant gravel. Culvert is fully embedded. Culvert length estimated based on photos.
Photos: PSCIS ID 203609. From top left clockwise: Road/Site Card, Barrel, Outlet, Downstream, Upstream, Inlet.





Location and Stream Data
Crossing Characteristics –
Date 2025-09-23 Crossing Sub Type Round Culvert
PSCIS ID 203610 Diameter (m) 2.9
External ID 16401547 Length (m) 30
Crew AI Embedded Yes
UTM Zone 10 Depth Embedded (m) 0.6
Easting 476482 Resemble Channel yes
Northing 6147549 Backwatered Yes
Stream Tributary To Williston Reservoir Percent Backwatered 50
Road Finlay FSR Fill Depth (m) 2
Road Tenure Sekani R10040 19 Outlet Drop (m) 0
Channel Width (m) 2 Outlet Pool Depth (m) 0.1
Stream Slope (%) 0 Inlet Drop Yes
Beaver Activity Yes Slope (%) 1
Habitat Value Medium Valley Fill Deep Fill
Final score 11 Barrier Result Passable
Fix type – Fix Span / Diameter –
Comments: Beaver dam located 1m upstream from the inlet. Pipe is embedded and the top 10m is backwatered. Smaller stream with some pockets of gravel and decent flow – although there were heavy rains yesterday.
Photos: PSCIS ID 203610. From top left clockwise: Road/Site Card, Barrel, Outlet, Downstream, Upstream, Inlet.





Location and Stream Data
Crossing Characteristics –
Date 2025-09-23 Crossing Sub Type Bridge
PSCIS ID 203611 Diameter (m) 18.3
External ID 16401393 Length (m) 5
Crew AI Embedded No
UTM Zone 10 Depth Embedded (m) –
Easting 486421 Resemble Channel –
Northing 6124806 Backwatered No
Stream Tributary To Williston Reservoir Percent Backwatered –
Road Modeste FSR Fill Depth (m) –
Road Tenure MoF Outlet Drop (m) 0
Channel Width (m) 0 Outlet Pool Depth (m) 0
Stream Slope (%) 0 Inlet Drop No
Beaver Activity No Slope (%) 0
Habitat Value – Valley Fill –
Final score 10 Barrier Result Passable
Fix type – Fix Span / Diameter –
Comments: Bridge
Photos: PSCIS ID 203611. From top left clockwise: Road/Site Card, Barrel, Outlet, Downstream, Upstream, Inlet. 





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