Fish Passage Site 20501407
Coordinates (dec. deg.): 62.31582°, -150.22112°
Legal Description: S026N005W28
Region: South Central
Road Name: Susitna River Road
Datum: NAD83
Quad Name / ITM: Talkeetna B-1
AWC Stream #:
Stream Name: Trapper Creek tributary
Site Comments: SUSITNA RIVER WATERSHED
Multiple surveys have been conducted at this site — click on the drop down
arrow to the right of the survey date below to choose a different report for this site.
Project Supervisor: Gillian O'Doherty, ADFG
Observers: Heidi Zimmer, Ben Histand
Overall Fish Passage Rating: Green
Tidal: No
Backwatered: Yes
Step Pools: No
Construction Year:
Site Observations:
- Culvert gradient red
- Culvert gradient gray
- Hydraulic flows exceeded capacity
Comments: Two previous sites combined into one. PRK041A044 & PRK041A045
Culvert Measurements
| ID: 1 |
Structure Type: Circular pipe (Corrugated steel) |
Fish Passage Rating: Green |
| |
| Length(ft): 50.4 |
| Inlet Type: Flared Inlet |
| Outlet Type: Flared Inlet |
| Corrugation Depth(in.): 0.5 |
| Corrugation Width(in.): 2.67 |
| Condition Rating(1-5): 4 |
| Approach Angle: |
| Sedimentation At Inlet: No |
| Inlet Substrate: None |
| Outlet Substrate: Gravel |
|
| Inlet | Outlet |
|---|
| Width(ft): | 2.9 | 3.0 |
| Height(ft): | 3.0 | 2.1 |
| Apron Length(ft): | 5.0 | 4.5 |
| Water Depth(ft): | | 1.35 |
| Rustline Height(ft): | 0.0 | |
| Substrate Depth(ft): | 0.0 | 0.9 |
|
| Backwatered?: No |
| Baffles Present: No |
| Embedded?: No |
| Outfall Height: 0.0 |
| Outfall Type: At Stream Grade |
Constriction Ratio: |
| Culvert Gradient: 0.46% |
| Max Slope: |
| Max Slope Length: |
|
| |
Culvert Observations:
- None of this type
|
| ID: 2 |
Structure Type: Circular pipe (Corrugated steel) |
Fish Passage Rating: Red |
| |
| Length(ft): 50.2 |
| Inlet Type: Flared Inlet |
| Outlet Type: Flared Inlet |
| Corrugation Depth(in.): 0.5 |
| Corrugation Width(in.): 2.67 |
| Condition Rating(1-5): 5 |
| Approach Angle: |
| Sedimentation At Inlet: No |
| Inlet Substrate: None |
| Outlet Substrate: None |
|
| Inlet | Outlet |
|---|
| Width(ft): | 2.9 | 2.9 |
| Height(ft): | 3.0 | 3.0 |
| Apron Length(ft): | 5.0 | 4.5 |
| Water Depth(ft): | | 0.0 |
| Rustline Height(ft): | 0.0 | |
| Substrate Depth(ft): | 0.0 | 0.0 |
|
| Backwatered?: No |
| Baffles Present: No |
| Embedded?: No |
| Outfall Height: 0.0 |
| Outfall Type: At Stream Grade |
Constriction Ratio: |
| Culvert Gradient: -1.14% |
| Max Slope: |
| Max Slope Length: |
|
| |
Comments: Dry |
| |
Culvert Observations:
- Culvert gradient red
|
| ID: 3 |
Structure Type: Circular pipe (Corrugated steel) |
Fish Passage Rating: Green |
| |
| Length(ft): 49.8 |
| Inlet Type: Flared Inlet |
| Outlet Type: Flared Inlet |
| Corrugation Depth(in.): 0.5 |
| Corrugation Width(in.): 2.67 |
| Condition Rating(1-5): 5 |
| Approach Angle: |
| Sedimentation At Inlet: No |
| Inlet Substrate: None |
| Outlet Substrate: None |
|
| Inlet | Outlet |
|---|
| Width(ft): | 3.0 | 3.0 |
| Height(ft): | 2.9 | 2.9 |
| Apron Length(ft): | 5.0 | 4.5 |
| Water Depth(ft): | | 0.42 |
| Rustline Height(ft): | 0.0 | |
| Substrate Depth(ft): | 0.0 | 0.0 |
|
| Backwatered?: Yes |
| Baffles Present: No |
| Embedded?: No |
| Outfall Height: 0.0 |
| Outfall Type: At Stream Grade |
Constriction Ratio: |
| Culvert Gradient: -0.28% |
| Max Slope: |
| Max Slope Length: |
|
| |
Comments: Pipe is backwatered. |
| |
Culvert Observations:
- None of this type
|
| ID: 4 |
Structure Type: Circular pipe (Corrugated steel) |
Fish Passage Rating: Gray |
| |
| Length(ft): 49.8 |
| Inlet Type: Flared Inlet |
| Outlet Type: Flared Inlet |
| Corrugation Depth(in.): 0.5 |
| Corrugation Width(in.): 2.67 |
| Condition Rating(1-5): 5 |
| Approach Angle: |
| Sedimentation At Inlet: No |
| Inlet Substrate: None |
| Outlet Substrate: None |
|
| Inlet | Outlet |
|---|
| Width(ft): | 2.9 | 2.9 |
| Height(ft): | 3.0 | 3.0 |
| Apron Length(ft): | 4.5 | 4.5 |
| Water Depth(ft): | | 0.42 |
| Rustline Height(ft): | 0.0 | |
| Substrate Depth(ft): | 0.0 | 0.0 |
|
| Backwatered?: No |
| Baffles Present: No |
| Embedded?: No |
| Outfall Height: 0.0 |
| Outfall Type: At Stream Grade |
Constriction Ratio: |
| Culvert Gradient: 0.98% |
| Max Slope: |
| Max Slope Length: |
|
| |
Culvert Observations:
- Culvert gradient gray
|
| ID: 5 |
Structure Type: Circular pipe (Corrugated steel) |
Fish Passage Rating: Red |
| |
| Length(ft): 53.3 |
| Inlet Type: Flared Inlet |
| Outlet Type: Flared Inlet |
| Corrugation Depth(in.): 0.5 |
| Corrugation Width(in.): 2.67 |
| Condition Rating(1-5): 5 |
| Approach Angle: |
| Sedimentation At Inlet: No |
| Inlet Substrate: None |
| Outlet Substrate: None |
|
| Inlet | Outlet |
|---|
| Width(ft): | 2.9 | 3.0 |
| Height(ft): | 3.0 | 2.9 |
| Apron Length(ft): | 4.5 | 4.5 |
| Water Depth(ft): | | 0.41 |
| Rustline Height(ft): | 0.0 | |
| Substrate Depth(ft): | 0.0 | 0.0 |
|
| Backwatered?: No |
| Baffles Present: No |
| Embedded?: No |
| Outfall Height: 0.0 |
| Outfall Type: At Stream Grade |
Constriction Ratio: |
| Culvert Gradient: 1.44% |
| Max Slope: |
| Max Slope Length: |
|
| |
Culvert Observations:
- Culvert gradient red
|
| ID: 6 |
Structure Type: Circular pipe (Corrugated steel) |
Fish Passage Rating: Red |
| |
| Length(ft): 49.6 |
| Inlet Type: Flared Inlet |
| Outlet Type: Flared Inlet |
| Corrugation Depth(in.): 0.5 |
| Corrugation Width(in.): 2.67 |
| Condition Rating(1-5): 4 |
| Approach Angle: |
| Sedimentation At Inlet: No |
| Inlet Substrate: None |
| Outlet Substrate: None |
|
| Inlet | Outlet |
|---|
| Width(ft): | 2.9 | 2.9 |
| Height(ft): | 3.0 | 3.0 |
| Apron Length(ft): | 4.5 | 4.5 |
| Water Depth(ft): | | 0.85 |
| Rustline Height(ft): | 0.0 | |
| Substrate Depth(ft): | 0.0 | 0.0 |
|
| Backwatered?: No |
| Baffles Present: No |
| Embedded?: No |
| Outfall Height: 0.0 |
| Outfall Type: At Stream Grade |
Constriction Ratio: |
| Culvert Gradient: 1.25% |
| Max Slope: |
| Max Slope Length: |
|
| |
Culvert Observations:
- Culvert gradient red
|
Stream Measurements
| Stream Substrates | Upstream | Downstream |
|---|
| Dominant: | Silt/Clay | Silt/Clay |
| Subdominant: | | |
|
| Stream Slope(deg.): | |
|---|
| Stream Flow Stage: | Medium |
|---|
|
No stream width data available.
Elevations
| Locator ID |
Culvert
Number |
River
Distance (ft)1 |
Distance From
Crossing (ft)2 |
Relative
Elevation (ft) |
| Outlet Pool Water Elev |
4 |
|
|
95.76 |
| U/S Headwater |
4 |
|
|
95.88 |
| Outlet Pool Water Elev |
5 |
|
|
96.46 |
| Outlet Pool Water Elev |
3 |
|
|
96.53 |
| U/S Headwater |
2 |
|
|
96.54 |
| U/S Headwater |
3 |
|
|
96.55 |
| Outlet Pool Water Elev |
1 |
|
|
96.69 |
| U/S Headwater |
1 |
|
|
96.70 |
| Outlet Pool Water Elev |
6 |
|
|
96.85 |
| U/S Headwater |
6 |
|
|
96.86 |
| D/S Water Surface Elev (ws @ TWC) |
3 |
0.00 |
30.0 |
96.53 |
| D/S Tailcrest or 1st Thalweg (TWC for pipe 3) |
3 |
0.00 |
30.0 |
96.37 |
| D/S Tailcrest or 1st Thalweg (TWC of out pool #4) |
4 |
14.50 |
15.5 |
95.57 |
| D/S Water Surface Elev (ws @ TWC) |
4 |
14.50 |
15.5 |
95.75 |
| D/S Thalweg (end apron) |
4 |
25.50 |
4.5 |
95.21 |
| D/S Thalweg (end apron) |
3 |
25.50 |
4.5 |
95.98 |
| D/S Thalweg (end apron) |
2 |
25.50 |
4.5 |
96.77 |
| D/S Thalweg (end apron) |
5 |
25.60 |
4.4 |
95.93 |
| D/S Thalweg (end apron) |
6 |
25.70 |
4.3 |
95.81 |
| D/S Thalweg (end apron) |
1 |
25.70 |
4.3 |
95.63 |
| Outlet Invert |
4 |
30.00 |
0.0 |
95.34 |
| Outlet Invert |
1 |
30.00 |
0.0 |
95.34 |
| Outlet Invert |
6 |
30.00 |
0.0 |
96.00 |
| Outlet Invert |
5 |
30.00 |
0.0 |
96.05 |
| Outlet Invert |
3 |
30.00 |
0.0 |
96.11 |
| Outlet Invert |
2 |
30.00 |
0.0 |
96.94 |
| Road Elev (over pipe 1) |
|
55.00 |
|
103.30 |
| Road Elev (over pipe 6) |
|
55.00 |
|
103.69 |
| Inlet Culvert Invert |
2 |
80.00 |
0.0 |
96.37 |
| Inlet Culvert Invert |
5 |
80.00 |
0.0 |
96.82 |
| Inlet Culvert Invert |
6 |
80.00 |
0.0 |
96.62 |
| Inlet Culvert Invert |
1 |
80.00 |
0.0 |
95.57 |
| Inlet Culvert Invert |
4 |
80.00 |
0.0 |
95.83 |
| Inlet Culvert Invert |
3 |
80.00 |
0.0 |
95.97 |
| U/S Thalweg (end apron) |
4 |
84.40 |
4.4 |
95.84 |
| U/S Thalweg (end apron - WD = .28 @ end apron) |
5 |
84.40 |
4.4 |
96.45 |
| U/S Thalweg (end apron) |
2 |
84.50 |
4.5 |
95.90 |
| U/S Thalweg (end apron) |
3 |
84.60 |
4.6 |
95.83 |
| U/S Thalweg (end apron) |
1 |
84.70 |
4.7 |
95.63 |
| U/S Thalweg (end apron) |
6 |
86.00 |
6.0 |
95.82 |
Notes:
- River distance is measured continuously throughout the survey reach along the thalweg of the stream.
- Measured from each end of the crossing along the thalweg of the stream.
Fish Sampling Efforts
No fish sampling occurred during this survey.
Fish Observations
No fish observations occurred during this survey.
Questions or comments about this report can be directed to dfg.dsf.webmaster@alaska.gov
