671 



Appendix B 



Obstructions ort the Eraser River watershed, the investigation and improvement of 

 which is recommended by the International Pacific Salmon Fisheries Commission 



Stream 



Name of obstruc- 

 tion and location 



Description and importance 



Remedial measures 



1. Fraser River. 



2. Eraser River. 



3. Lillooet River. 



4. Chilcotin River. 



5. Chiiko River... 



6. Quesnel River. 



7. Stellako River... 



8. Bowron River. 



9. Morris Creek... 



Hell's Gate 

 Canyon. 



Bridge River 

 Rapids. 6 

 miles above 

 Lillooet. 



Skookumchuck 

 Rapids. 18 

 miles above 

 Harrison Lake. 



Farwell Canyon, 

 11 miles from 

 mouth. 



Keighley Holes 7 

 miles above con- 

 fluence of Chil- 

 cotin River. 



Rapids 4 miles be- 

 lov/ Likely. 



Falls 4 miles above 

 Fraser Lake. 



Gravel bars, 



mouth of 



Bowron River. 

 Shallow channel. 



Mouth of 



Morris Creek. 



Impassable obstruction at certain 

 water levels. Principal spawn- 

 ing grounds of the Fraser sys- 

 tem are controlled largely by 

 conditions at this point. 



Two rapids 900 ft. apart. Both 

 serious obstnictions to salmon 

 migration below 20 ft. level. i 

 Over % of available spawning 

 area above this point. Formerly 

 bulk of escapement spawned 

 above this obstruction . 



Rapids in constricted, canyon- 

 bound channel. Records of sock- 

 eye delayed from 1 to 21 days. 

 Blockade forms above 1 ft. level 

 on gauge. Commonly inflicts 

 heavy mortality on important 

 Birkenhead run. 



Constricted, bed-rock channel 

 with fall of 4 to 6 ft. at obstruc- 

 tion. Blockade above 3 ft. level 

 on gauge. Over 15% of Chiiko 

 iTin normally lost at this ob- 

 stacle. 2 



Channel between high dirt banks. 

 Large boulders in bed cause fall 

 of 5 ft. at obstruction. Chiiko 

 run delayed at all common water 

 levels. 2 



Obstruction caused by tailings 

 from Boullion mine. Present 

 channel is constricted by 

 dumped rock so that velocity of 

 flow is too great for natural pas- 

 sage of salmon. 



A 3 ft. falls located in spawning 

 area is ascended with dif Acuity. 

 Elimination of obstruction 

 would encourage extension of 

 spawning area to desirable 

 streams above. 



At low water stages there is not 

 sufficient water on gravel bars 

 to allow sahnon to ascend. 



Similar to above. At low water 

 channel nearly dry caused by 

 seepage near mouth. Run 

 commonly delayed two to three 

 weeks before able to enter. 



Construction of permanent 

 fish-ways on each bank 

 at point of obstruction. 



Construct fish-ways and 

 improve channel for each 

 rapids on both banks of 

 river. 



Install fish-way on left 

 bank and alter channel. 

 Include 10 ft. maximum, 

 water fluctuations. 



Construct fish-way on left 

 bank. Blast cut in rock 

 on right bank. Cover & 

 ft. maximum water fluc- 

 tuations. 



Remove boulders and rock 

 debris from channel. 

 Construct baffles on right 

 bank to reduce velocity 

 of flow. 



Remove rock debris from 

 channel and restore orig- 

 inal conditions. 



Reduce flow in channel. 



Dredge one main channel 

 for entire flow of river. 



Concentrate flow into one 

 main chamrel. 



Stream 



Tributary to- 



Description 



Remedial measures 



10. Boise Creek. 



11. Douglas Creek. 



12. Railway Creek. 



13. McKenzie 

 Creek. 



Upper Pitt River. 



Harrison Lake 



Upper Lillooet 

 River. 



Upper Lillooet 

 River. 



Excellent soekeye stream with 

 large amount of potential 

 spawning area. Numerous log 

 jams present of which some are 

 impassable to salmon. Serious 

 damage done by floods. 



Spawning beds scoured by logs 

 and further damaged by floods. 

 Formerly a very important 

 spawning stream. 



Beaver dam is located J^ mile 

 above mouth. Good spawning 

 area above dam. Soekeye now 

 limited to lower part of stream. 



Beaver dam located 20 yards from 

 mouth. Soekeye formerly 

 spawned above dam but now 

 confined to lower part of stream. 



Remove log jams and im- 

 prove spawning condi- 

 tions. 



Remove log jamsl from 

 channel. 



Transplant beavers to non- 

 salmon stream. Remove 

 dam. 



Transplant beavers to non- 

 salmon stream and re- 

 move dam. 



J Hell's Gate gauge. 



« Chiiko run composes over 80% total escapement, 1940-1941. 



