Kevin T. Lesko

1
The Homestake Underground Laboratory

• Kevin T. Lesko
• for the Homestake Collaboration
• 2 August 2005

2
Homestake Laboratory Status and Plans

• Proposed Site for the Revised NSF DUSEL
  Solicitation Process
• With Henderson Mine in Colorado, these are the
  two sites being investigated in the US for a Deep
  Underground Scientific and Engineering Laboratory
  
• The State of South Dakota, working with the
  science communities is proposing an early
  access option for Homestake funded from State
  control resources
• Significant Progress by the State on a number of
  important issues, including Title,
  Indemnification, Reclamation of the Site for
  science

3
Major Issues for DUSEL (regardless of site) and
Progress at Homestake

• Title to the Property
• Depth
• Access
• Safety
• Defining the Science Programs
• Supporting the Science and Education Programs

4
Early Implementation Plan

• To preserve Homestake for DUSEL addresses water,
  title, access initially to 4850 and ultimately to
  8000
• Funded Initially by South Dakota
• includes 4850 Lab access
• 5 years of basic operations of the site
• Plans need to be tailored for the science
  programs
• Plan was established and vetted last year to
• obtains title and access to the facility
• deal with the water (upper water immediately
  2/3 of the 700 g/min), ensure lower water is
  stopped below 4850
• refurbish lifts and shafts (Ross and Yates)
• establish an interim facility at 4850 and above
  start science early!
• establish a plan for growth into a national
  facility

5
Title

• Barrick and South Dakota agreed to the transfer
  of the property in January 2004, in Feb. 2005
  this was expanded to include the 4850 early lab
  
• SDSTA, Barrick and the State Government
  (Governors office) are in the final stages of
  the process to implement the transfer and to
  amend the Agreement in Principle to suit the
  4850 lab
• Governors Office is enthusiastic anxious to
  pursue state funding sources as soon as the
  Agreement is completed
• Process should reach closure according the
  original schedule - title expected to be secured
  by October 2005

6
Permitting EPA

• Water discharge permits have been obtained,
  extension of the current permits obtained by
  Barrick and transfered to SDSTA
• Mine closure plan vetted by EPA several years
  ago, including site inspections

7
Water

• Not uncommon to have water of this magnitude in a
  mine, 2/3 from the surface
• Cycles of Flooding and dewatering are not
  uncommon
• Water quality not likely to significantly degrade
  the infrastructure (pH neutral water)
• Important to preserve the 4850 level
• Implementation plan deals with this

8
Water

• Pumps shut off in May 2003
• 6800 level was crossed Nov 2004 month behind
  expectations
• 6200 has not yet been crossed
• Expected to cross 4850 late 2007-early 2008, if
  nothing is done in the mean time

9
Depth

• Access to 4850 foot level by 2007 as defined in
  the Early Implementation Plan
• Access to 8000 foot level and deeper as part of
  DUSEL effort within NSF 2009

10
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11
Access

• Using Existing Conveyances that will be inspected
  and restored as part of the Early Implementation
  Plan

Yates Ore Hoist By Nordberg Mfg. Co. Two
1,500 hp DC Motors Skip Payload 20,000 lb.

Surface to 4850 - Ross and Yates Shafts Each
cage 54 wide 12 foot deep 6 - 7 Ton
payload larger dimension loads can be slung
below cage Skips have 10 Ton capacity 4850 to
depth - 6 Winze, 4 Winze similar capacities
and dimensions
12
Fiber Optic Cable 24 pr, 62.5 micron, Tbase 10
12 Airline _at_ 90-100 psi
North Cage
South Cage
North Skip
South Skip
Each Cage Compartment 5-3-1/2 (F-F) x 13-4
Ea. Skip Comp. 4-10 (F-F) x 5 9
Yates Shaft Plan Approx. 27-8 x 15
13
Safety

• Foremost Concern for DUSEL
• Excellent Safety Record at Homestake
• Dedicated effort to integrate safety from the
  start both for the operations and science sides

14
Who Can Use it?
Earth Science, Biology and Engineering
Near Term Surface to 4850 hydrology, geology,
geochemistry Rock deformation studies using
drifts and shafts Studies of the cratonic crust
through 20 km3 Searches for life and exotic
biology including initial microbial
investigations Investigations of flow path
delineation in heterogeneous geological settings
ground water studies/models Characterizations
of facture mapping, stress measurements and
ground water chemistry Thermal-mechanical-hydrolo
gical couplings across many orders of magnitude
in scale Longer Term Systematic searches for
and characterizations of life Long term and
large scale characterizations and expts. Carbon
Sequestration
15
Who Can Use it?
Physics Uses
Near Term Cosmic Rays Studies Low Level
Counting Prototyping, Materials Production
for Double Beta Decay Dark Matter Next
Generation Dark Matter Next Generation Double
Beta Decay Nuclear Astrophysics Begin work on
Proton Decay Long Baseline Longer
Term Continued operation of DM, DBD Solar
Neutrinos CP violation Long Baseline PDK Supern
ovae monitors
16
Timeline for Homestake

• ? February 28, 2005 Submission of Homestake S-2
  Response to the NSF? May 15, 2005 4850-level
  Laboratory Implementation Plan submitted to the
  SDSTA June 15, 2005 Implementation Plan
  accepted by SDSTA, State of South Dakota and
  Barrick in progress and nearing completion
  (final review) September/October, 2005
  Request for Letters of Interest July 15, 2005
  Funds for the 4850 level laboratory access are
  secured State is poised to proceed as soon as
  title is obtained ? August 25, 2005 DENR Water
  discharge permits received by the SDSTA? August
  2005 Review of S-2 submission. 1st round of
  workshops gathering experimental requirements and
  criteria for the science and education and
  outreach programs Workshops in September/October
  2005 October 1, 2005 Transfer of the Homestake
  site from Barrick to SDSTA completed Spring
  2006 Begin work on site rehabilitation and the
  4850 level laboratory access January/February
  2006 2nd round of workshops defining engineering
  plans for Science, E O 2nd half 2006 4850
  level ready for construction of new chambers,
  occupancy existing chambers Early 2007
  Complete modifications to existing space and
  begin experiments

17
More details to become available as DUSEL
progress this Fall

• Active participation by all users is strongly
  encouraged
• Letters of Interest
• Helping to develop plans for DUSEL and Homestake
• neutrino.lbl.gov/Homestake
• www.dusel.org
• homestake.sdsmt.edu/Resources.htm
• ktlesko_at_lbl.gov