BETWEEN NORTH BLOOMFIELD AND EUREKA. 



407 





of Poorman's Creek just below Shand's. Some of the ridges, where bare of trees, are covered with 

 a thick growtli of manzanita chaparral. Seen from a little distance, the crest of such a ridge looks 

 like a gently sloping smooth mass of rock without any vegetation at all. 



The road from Eureka to the Bowman dam has to cross the ridge between Poorman's Creek and 

 Canon Creek, at the head of which the dam and reservoir are situated. The altitude of the highest 

 point on the road I made to be G,098 feet, and the thickness of the lava cap I estimated at from 

 350 to 500 feet. 



Considerable search has been made at different times for beds of gravel under these lava ridges, 

 in the belief that just those portions of the great lava-flow which now remain upon the ridges cor- 

 respond to the position of the original depressions of the surface or old channels. About a mile 

 and a quarter above Eureka, and to the left of the road to the dam, there was a small dump, at the 

 mouth of a tunnel running towards the lava ridge which rises to the southeast. I made the altitude 

 of the mouth of this tunnel to be 5,458 feet. There were no signs of gravel on the dump. The 

 tunnel had caved in and was inaccessible. I suppose it to be the one which had been described 

 to me bv the name of Griffith's claim. 



I also heard of another tunnel which could be reached by following the road which leads down 

 the sou tli fork of Poorman's Creek. My informant was Mr. W. C. Chase, who used to work in 

 the tunnel. Mr. Chase is now in the employ of the Bloomfield Company, in charge of the Bowman 

 dam. The tunnel was begun as far back as 1867, and has been worked at intervals since that 

 time. It has penetrated nearly a thousand feet under the lava capping. It was run in a crumbly 

 granitic bed-rock. The gravel found was in small quantities, filling the interstices between large 

 crumbly granitic boulders. The quartz pebbles were seldom larger than a teacup. There was gold 

 with the gravel, but not enough to pay expenses of working. The bed-rock appeared to pitch 

 towards the centre of the ridge. A small amount of drifting was done, which proved to be un- 

 profitable on account of the number and size of the boulders. 



The altitude of the porch of the house at the dam I made to be 5,393 feet, a number a little 

 higher than that adopted by Mr. Hamilton Smith. According to the figures on Mr. Smith's map, 

 which I saw at Bowman's, the altitudes of some of the more prominent points in this vicinity are 

 as follows. I have given the position of some of the points with reference to United States section 

 lines, or where these lines ought to be if the surveys were extended over the region. The town- 

 ships I am not able to give. 



House at Bowman's dam ............. 



Top of dam . . ............. 



Lakes at head of South Fork of Canon Creek. 



Shot-Gun Lake 



Middle Lake 



Crooked Lake 



Round Lake 



Island Lake 



Fall Creek Mountain, S. W. | of S. E. J of Section 21 



Grouse Ridge Mountain, S. W. | of N. E. J of Section 34 



Milton Dam, in Middle Yuba River 



Jackson's Ranch 



Faucherie Reservoir, principally in S. E. J of Section 13 



English " " N.J • " 4 



Finlow Peak 



English Mountain, N. E. J of N. E. | of Section 7 



Eureka Lake (dam), principally in Sections 17 and 20 



Meadow Lake, principally in E. \ of Section 22 and N. W. J of Section 23 



5,360 feet. 



5,450 



a 



6,410 



a 



6,460 



a 



6,510 



tc 



6,590 



u 



6,690 



it 



7,290 



a 



7,430 



u 



5,670 



u 



5,870 



ti 



6,060 



ti 



6,140 



a 



7,020 



ti 



7,980 



u 



6,480 



(,c 



*7 f\Af\ 



u 



Faucherie Mountain, near Section Corner ~ 



14 13 



•li 



7,170 



u 



The big dam at Bowman's is just north of the half-mile stake between Sections 5 and 8. 



