1925 DEPARTMENT OF LANDS AND FORESTS 103 



Poskogami; 137 in the Parks Lake; 83 in the Upper Sturgeon; 326 in the Black- 

 water; 68 in the Lower Sturgeon; 76 in the North Wind lake; 211 in the Onaman; 

 185 in the Ombabika and 100 acres in the North Shore. 



In addition to running strips, data was collected on 200 felled jackpine trees 

 for the purpose of constructing a volume table suitable for this region and to be 

 used in estimating the contents of the jackpine into feet board measure, cords 

 and ties. 



The field data has been compiled by watersheds. Each type has been given 

 a number, and corresponding with that number is a summary sheet with whatever 

 tally has been taken in that type. 



Maps have been constructed to show: 



1. A key map of forest areas. 



2. Forest types in age classes. 



3. Age class conditions. 



4. Organization of ground work, showing camps and strips. 



5. A base map of waterways. 



(b) Aerial Type Mapping. — During the summer season of t923 the aerial 

 type mapping was completed in detail for the tract covered in this survey plus a 

 general sketch of an additional 1,800 square miles north of the Transcontinental 

 railway and largely confined within the Nipigon watershed. According to the 

 report on flying for the northern area, "fully eighty-five per cent, may now be 

 classified as barren, burn and muskeg, with a liberal fifteen per cent, allowance 

 for the scrubby remains of former timber stands fringing the watercourses and 

 in damp hollows. Under the above conditions it was not considered advisable 

 to expend the time or run the risks necessary to prepare a detailed type map of 

 this territory." 



Flying was carried on from two bases. Orient Bay and a small island near 

 the mouth of the Ombabika river. Work commenced June 9th and was com- 

 pleted July 13th, 1923. To complete the type mapping for both the area done 

 in detail and the northern area in general required 104 hours' flying. 



The field parties were fortunate in having, previous to going into the woods, 

 a type map giving a detailed picture of type and age class conditions. 



3. Summary of Forest Conditions (Eastern Watershed).— The area covered 

 by this survey comprises a total of 1,773,000 acres east from Lake Nipigon to 

 the height of land and extending from the Transcontinental railway on the north 

 to the reserve boundary on the south. 



From north to south there is a general change in topographic and' forest 

 conditions. Topographically, three subareas are recognizable. The northern 

 third, or that section confined in the North Shore, .Ombabika and Onaman blocks 

 has a low relief resembling the clay belt. Considerable of the area is occupied 

 by stands of scrubby growth and on the whole is not so well drained as the areas 

 south of it. Soils, for the most part, are heavier with considerable clay. This 

 is reflected in the forest composition as the northern third carries only a small 

 percentage of jackpine but a good spruce yield. On the whole the stands are 

 older on account of having sufi^ered less from fire. 



Coming south to the middle or intermediate area which parallels the Cana- 

 dian National Railway both north and south to include the drainage system of 

 North Wind lake, the Sturgeon or Namewaminikan river and Blackwater river, 

 the relief becomes slightly more pronounced, drainage improves and the soils 

 are more sandy. Jackpine becomes a more important component of the stand, 

 furnishing the highest percentage of any of the blocks. This section has, as 



