Tenn. Comp. R. & Regs. 1680, 1680-06, ch. 1680-06-01, 1680-6-1-.10, app 9
General Provisions
1. Each side of the trench shall be line drilled at 6" C.C. Maximum.
2. Blast holes shall be drilled 6" minimum from plane of line drill.
3. Blast holes shall be loaded with a maximum of 0.5 pounds of water resistant gelatin at no greater than 60%
strength.
4 Blasting shall be sequenced so as each shot will kick to an open face.
5. Steel blasting mats shall be used to cover each shot.
6. A maximum of 10 holes or 20 linear feet, whichever is less, shall be loaded and shot at any one time.
Provisions for Blasting Near Structures
1. When blasting around or under highway structures, the State will have an inspector inspect the structure before and after the blasting operation is complete, recording the time and findings in diary form. In the event any damage to the structure is observed. all work within the area shall be immediately suspended and shall remain suspended pending investigation by the State as to the extent of damages.
2. A responsible representative of the explosive supplier shall be present on the site at all times the utility or its contractor is performing any blasting operations within the State's right-of-way.
Tenn. Comp. R. & Regs. 1680, 1680-06, ch. 1680-06-01, 1680-6-1-.10, app 9
Authority: T.C.A. § 4-2-2303(2).