Newfie...
The butt section was 25' to the first branch, small end 30" and calculated weight of 8,350 lbs. The next section was 18' long and 18" small end calculating to 3,350 lbs. for a total calculated weight of 11,700 lbs. from 43' of Walnut. My estimate of 10,000 was conservative at best.
Below is a report of your entries: (Woodweb.com)
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Species: Walnut Small End Diameter: 30.00 Large End Diameter: 36.00 Length: 25.00' Quantity: 1.00 Estimated Weight: 8350 Estimated Weight subtotal: 8350
Species: Walnut Small End Diameter: 18.00 Large End Diameter: 30.00 Length: 18.00' Quantity: 1.00 Estimated Weight: 3352 Estimated Weight subtotal: 11702