$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)

Underground Construction Estimate 12 March 2004

Near & Far Shaft Layouts 2 Alimak-type Elevators Ref. John Dreyzehner # 847-998-4646 2 Pumps (under crane each 100gpm @ 425’ head) Ref. Bill Willcox, Godwin Pumps #708-889-1560 Cable Trays, Ventilation and Piping to determine Not to Scale

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

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

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

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

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)