D.—No. 6c

RAILWAY BRIDGES.

21

The material in this boring being mixed shingle and gravel (shingle of medium size) was very compact and uniform, and with i or f inch tubes might have been bored to full depth. After repeated ■withdrawals, the tube was driven to the depth of 14 feet, the remaining depth being easily penetrated ■with " gad " only. No. 6. Is situated on Canterbury shore near edge of boring, and was, as may be seen from schedule, composed of sand and shingle and gravel, loosely compacted and easily penetrated. The tube (3-16 inch) was driven to the depth of 14 feet, the remaining distance being tried with "gad" only. No. 7. Is represented by shallow borings placed as you directed, with flag staves fixed in them, and having 5 feet of cast iron tube inserted to retain flag staves.

Enclosure No. 3 to No. 25. SCHEDULE of Borings at Waitaki River, being test of Foundations for Railway Bridge.

i pq 6 Date. Stratification. Chisel. Chisel. Shell. Iron Tube. Depth of Strata. Depth of Bore. Total Depth of Bore. Eemarks. 1871. May 10 3 inch diani. f wrot. ft. in. ft. in. 4> 0 ft. in. No. 1 Shingle and sand Star On line of borings laid off on 27th April, and near peg 9400. „ 11 Gravel ... Sand ... Coarse sand ... Fine Shingle and sand )) J> M }) G 0 0 3 0 3 0 3 2 3 2 0 0 3 0 3 0 3 2 3 2 6 1 0 2 2 1 6 2 10 3 6 1 6 1 6 0 8i 0 61 0 5| 0 2 n H jj ]) tj M „ 13 „ 15 „ 22 „ 24 11 ,, ... »■• n u M H June 16 ,, 11 ... ... 12 noon, shingle and sand ... 5 p.m., „ „ Gravel and sand Shiuglo and sand n jj M )> » }} io'"o 3 6 j) S) ,, 17 1) ii 3 "o ,, h ... ... 11 a.m., came on rod 12 p.m., rock ... 2 p.m., „ ... 5 p.m., „ ... n i) a it H n M j» l'iof :27 "4| No. 2 May 22 Sand ... Shinglo ... Gravel and sand N )> 1 6 3 0 1 6 3 0 0 4 1 G 4 0 3 9 0 6 3 19 2 7 Situated on Bccond island from south, or Otago shore, summer level, and at peg 10, south on 800 chain curve. )) )> „ 24 „ 30 j, ,, •■• ••• Shingle and sand Shingle and gravel Gravel and sand Shingle and sand ... With }) H II || )) j> I 10 4 0 3 9 0 6 )) jj June 1 „ 13 i) j) n gad only jj 6 "5 2l'"o Situated main terrace at peg 30 on 800 chain curve, North, or Canterbury shore. No. 3 May 23 ,, „ ... Sand ... Fine shingle and sand n i wrot. 6 0 1 C 6 0 1 G 4 6 9 0 4 G 4 0 H jj „ 25 June 15 „ 18 tt it » ••• •*• I) jj With gad H jj H 22 0 29"'G ,, „ ., ... ... No. 4 .. 2 „ 3 „ 13 June 3 „ 6 „ 7 >. 8 » I3 jj a a ••■ ••• Shingle and sand Heavy shingle Shingle and sand Made an attempt to bore withou Shingle, sand, and gravel Shinglo and gravel With t succe gad SB 7 0 1 9 8 9 7 0 1 9 ] 8 9 8 9 3 3 2 0 6 9 h'"g Situated on spit in middle of river on line of borings, and is second boring on that line. Situated on large island, next to Canterbury shore, on line of borings, and is third on that line. No. 5 8'"9 With gad 12 "0 20 9 ,, ,, ... ... No. 6 June 13 )> it Sand and gravel Sand and iooBe shingle Cemented Shingle Shingle and sand 3 0 10 0 0 6 7 6 3 0 10 0 0 6 7 G Situated on North, or Canterbury eide of line of borings,being fourth on that line. *) 1) 2l'"o >> )J No. 7 May 19 Shallow borings for flag staves Shingle No. 10, South „ No. 20, , „ No. 0, „ „ No. 10, North „ No. 20. , „ No. 10, South, on 1,000 chain curve. „ No. 20, „ at 10 chains, pegs cstiron across 4 0 4 0 4 0 4 0 4 0 4 0 river. 4 0 4 0 4 0 4 0 4 0 4 0 Placed to indicate line of curvo in flood time. H II ., 20 11 }t a >, 27 >> 1} H 4 0 4 0 28 0 Tnoa. Foeb: :stee, Eecord Clerk. 27th Jum !, 1871.