2010 Construction and Material Specifications - Ohio Department of ...

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208.21
B. Report of Loss. If a loss or theft of explosives occur, report all
circumstances and details of the loss or theft immediately to the nearest Bureau of
Alcohol, Tobacco and Firearms, as well as to the local law enforcement authorities
and the Engineer.
C. Daily Drilling and Blasting Logs. On a weekly basis, provide a daily log of
the drilling and blasting operations. Update the log at the close of each business
day.
Fill out the Department or blaster’s drilling form to document the following:
burden, spacing, bench height, hole depth and diameter, and subdrill depth.
Document additional information about the drilling such as voids, mud seams, air
pressure loss and lack of cuttings. The driller shall give this form to the blaster
and the Department.
Document on the blasting log the number of blasts, times and dates of blasts,
the blasting locations and patterns, and all of the following information:
1. Station limits of the shot.
2. Plan and section views of drill pattern including free face, burden, blast
hole spacing, blast hole diameters, blast hole angles, lift height, and subdrill depth.
3. Loading diagram showing type and amount of explosive, primers, and
initiators and location and depth of stemming.
4. Initiators sequence of blast holes including delay times and delay
system in each blast hole.
5. Trade names and sizes of all explosives, primers, and initiators to be
employed.
6. Signature of the blaster in charge.
7. Use the blaster’s blasting form or the Blasting Report form in FHWA
Publication FHWA-HI-92-001 Rock Blasting and Overbreak Control. Adapt these
forms to meet the project requirements.
The drilling and blasting logs are for quality control, informational, and
record keeping purposes. Review of the blast log by the Engineer does not relieve
the Contractor of responsibility for the accuracy and adequacy of the drilling and
blasting log.
D. Video Recording of Blasts. Record video of each blast. Index the
recordings in a manner that permits easy and correct identification of each blast.
Submit copies of the blast recordings on a weekly basis. If submitting the video
recordings as electronic data files, furnish them in a video format acceptable to the
Engineer and capable of being viewed on the Department’s computers.
208.21 Method of Measurement. The Department will measure Presplitting
by the number of square yards (square meters) along the slope face of the cut. The
horizontal measurement will begin at the first hole and end at the last hole of the
cut, and the vertical slope measurement will be along the sloped drill hole.
208.22 Basis of Payment. The Department will not make separate payment
for the production blasting operations. Payment for the production blasting is