1. $150K Chicago/ANL seed funding for Braidwood site investigation
Possible uses:
Underground construction estimate (DONE)
2 bore holes to full depth
Surface building and infrastructure design
Surface detector movement
- detector engineering (ANL)
- engineering of surface transport (FNAL)

2. Underground Construction Estimate
12 March 2004

3. Near & Far Shaft Layouts
2 Alimak-type Elevators
Ref. John Dreyzehner #
2 Pumps (under crane each 425’ head)
Ref. Bill Willcox, Godwin Pumps #
Cable Trays, Ventilation and Piping to determine
Not to Scale

4. Far Shaft and Detector Room Plan
Excavation by Drill & Blast
Support as excavated by rock bolts
Support at convenience (~1 week) by reinforced shotcrete (10cm)
Water Control by weep holes on 5x5 m grid
Not to Scale

5. Far Detector Room Section
Excavation
Drill & Blast
12 x 14 x 15 m long
Support as excavated
Rock Bolts every 1.8 m
5 x 3.0m & 8 x 1.2m
10 cm reinforced shotcrete
Water Control
Weep holes 5x5 m grid in dry
Hydroguard over moist/wet fractured zones ~ 30 m of 30cm strips
Finish-Out
Shell only with embedded rails, drainage, ventilation and utility run supports
Not to Scale

6. Running Tunnel Section
Excavation (supported dimension)
Drill & Blast
8 x 8.5 x 300 m long
Support as Excavated
Rock Bolts every 1.8 m
5 x 2.5 m long 1.5 m spacing
Support Delayed
10 cm reinforced shotcrete everywhere
Water Control
Weep holes 5x5 m grid in dry
Hydroguard over moist/wet fractured zones ~ 300 m of 30cm strips
Finish-Out
Shell only with drainage, ventilation and utility run supports
Not to Scale

7. Near Detector Room Excavation Support Finish-out Drill and Blast
32 x 12 x 14 m
Support
3m bolts on 1.5m center
1.8 m spacing
10cm reinforced shotcrete
Finish-out
30 cm concrete floor
Pipe & cable racks
Ventilation duct
Tunnel
Refuge
Not to Scale

8. Estimate provides detailed cost and schedule for project. Bottom line:
Cost $34.6 M (without contingency)
Time 39 months
Comments:
Estimate does not include permanent surface buildings, but seems
rather complete for underground work (e.g., includes
decommissioning of shafts at end of project).
300m tunnel section adds $9.1 M to cost and 9 months to schedule
Sequential construction of shafts almost doubles construction time.
Design may be modified to reduce cost 10-20%. (CL)
Site investigation can reduce contingency (2 bore holes = contingency
lowered to 25% from recommended 40%. (CL)