USS Olympia
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USS Olympia Length 344 feet Beam 53 feet Draft Today 17 feet fwd 20.5 feet aft Displacement PowerPoint PPT Presentation


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USS Olympia Length 344 feet Beam 53 feet Draft Today 17 feet fwd 20.5 feet aft Displacement In service 5,600 tons Today 4,780 tons Stability Today GM0.67’ 29 tons/inch immersion Crew 400 enlisted 40 officers Today 5 Speed 22 + knots Coal capacity

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USS Olympia Length 344 feet Beam 53 feet Draft Today 17 feet fwd 20.5 feet aft Displacement

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Uss olympia length 344 feet beam 53 feet draft today 17 feet fwd 20 5 feet aft displacement

USS Olympia

Length

344 feet

Beam

53 feet

Draft Today

17 feet fwd

20.5 feet aft

Displacement

In service 5,600 tons

Today 4,780 tons

Stability Today

GM0.67’

29 tons/inch immersion

Crew

400 enlisted

40 officers

Today 5

Speed

22 + knots

Coal capacity

1100 tons

Today Empty

Cruising range

2,500 miles

Armaments

(4)8” guns (mock-ups)

(8) 5” guns

(6) on loan, NHHC

(10) 6-pounder guns

Originally equipment

6 Auxiliary sails


Over 15 years of study

Over 15 years of Study

  • Robert C. Stewart: Historic American Engineering Record: USS Olympia, HAER PA 428

  • NAVSEA, Inclining: simple stability test

  • Don Birkholtz Jr: drafted Cruiser Olympia; Historic Structure Report

  • Dr. Cooling: Olympia: Herald of Empire

  • ATC Environmental, comprehensive lead and asbestos evaluations and recommendations

  • Robert Jamieson, PE: single compartment floodability standard. Digitized over 300 construction drawings

  • Charles C. Deroko, oversaw bulkhead repairs, conducted hull survey, specifications for interim repairs.

  • Lawrence Burr, Us Cruisers 1883-1904


Uss olympia length 344 feet beam 53 feet draft today 17 feet fwd 20 5 feet aft displacement

Removed Inappropriate Displays


Uss olympia length 344 feet beam 53 feet draft today 17 feet fwd 20 5 feet aft displacement

  • Notable Preservation Projects

    • Museum’s boat shop replicated historic pilothouse later installed on the restored forward bridge deck

  • Restored multiple areas of ship and reopened to public, including Engine and Boiler rooms


Uss olympia length 344 feet beam 53 feet draft today 17 feet fwd 20 5 feet aft displacement

The Technical Challenges:

Leaking exterior decks

Watertight integrity of hull

Extensive dredging requirements


Uss olympia length 344 feet beam 53 feet draft today 17 feet fwd 20 5 feet aft displacement

  • Exterior Deck

  • Multiple leaks

  • Structurally compromised

  • Wood deck dates from before the 1920’s

  • Concrete layer added by US Navy, 1945

  • Polyurethane membrane added by Museum in 2003 to provide watertight integrity


Uss olympia length 344 feet beam 53 feet draft today 17 feet fwd 20 5 feet aft displacement

Olympia was last hauled in 1945. There are 72 patched holes in her hull to date. Chronic deck leaks contribute to decay of ship’s hull and interior.


Removal of olympia from penn s landing basin to effect repairs

Removal of Olympia from Penn’s Landing basin to effect repairs


Required for olympia removal dredging 28 000 cu yds of material

Required for Olympia removal:Dredging 28,000 cu/yds of material


Uss olympia length 344 feet beam 53 feet draft today 17 feet fwd 20 5 feet aft displacement

  • Stabilization efforts

    • Removed over 30 tons of asbestos and other contaminates

    • Repaired bulkheads to establish single compartment floodability standard

    • Installed remote-monitored alarm system with 54 damage control sensors

    • Restored watertight integrity to inner bottom tank tops

    • Effected interim repairs to damaged areas of the hull in way of wind and waterline


Uss olympia length 344 feet beam 53 feet draft today 17 feet fwd 20 5 feet aft displacement

Interim Repairs

Completed:

Internal repairs of

exterior hull over 15% of

waterline area included 32

Welded steel cofferdams


Cost summary

Cost Summary

Fabrication and Installation of a 700’ X 3’ doubler Belt around the waterline of the USS Olympia

  • Materials and Consumables: $161,000.00

  • Mobilization / Demobilization $40, 000.00

  • Day Rate $15,000.00/day

    • @ 200 days $3,000,000.00

      Note this is a rough estimate, there are potential savings in equipment rental, material costs. As well as improved production rate based on process improvement.

15


Uss olympia length 344 feet beam 53 feet draft today 17 feet fwd 20 5 feet aft displacement

  • Other options considered:

  • Secure ship in place with cofferdam and cement

  • Install double sheet pile wall around the ship and submarine

  • Dewater area

  • Effect repairs to exposed hull

  • Cement or backfill as needed

  • Note:

  • Without dredging and relocation of the Submarine Becuna, cofferdam would have to incorporate both Olympia and Becuna

  • Cement in this quantity is

  • non-reversible


Uss olympia length 344 feet beam 53 feet draft today 17 feet fwd 20 5 feet aft displacement

Cost $2.1 Million ++


Hull survey to determined realistic out of water repair costs

Hull Survey to determined realistic out of water repair costs


Uss olympia length 344 feet beam 53 feet draft today 17 feet fwd 20 5 feet aft displacement

The Road Forward:Most engineering and planning work is completed

  • Conducted stability tests and floodable length studies with US Navy and private contractors

  • Completed hull condition survey including over 1400 UT readings

  • Drafted tow and repair specifications

  • Reviewed docking plan with potential contractors

    Still required

  • Reballasting study, required for extended tow

  • Still water bending moment study,


Uss olympia length 344 feet beam 53 feet draft today 17 feet fwd 20 5 feet aft displacement

With proper preparations Olympia can be carefully towed to a local repair facility and properly supported she is capable of withstanding the spot loading of the dry dock blocking

Summary of Findings: Olympia IS repairable


Phase i hull work

Phase IHull Work

Dredging: 6 weeks

Tow Prep/Block and Prep Dock: 2 months

Tow to dry dock #2 or #3 PNBC

Haul Out: 3 months

Hydroblast hull

Install 4’X ½” belt at waterline (700 linear ft)

Visual and UT inspection of entire wetted surface (minimum 3000 shots)

Install additional plating where required up to 10%

Sand sweep

3 coats type 235 primer (or alternative high build coating)

Additional high build primer at waterline and on keel

Launch

Return tow


Phase ii redecking

Phase IIRedecking

Build Waterproof containment over exterior decks

Install interior containment to preserve historic fabric

Remove and preserve historic fittings, including stacks, masts and ventilators

Remove 7” of exterior coatings, including 70 tons of concrete and 3” original decking

Repair and recoat steel substructure

Install prefabricated Teak Deck Systems panels

Reinstall historic fittings


Cost of olympia preservation 000

Cost of Olympia Preservation($000)

PHASE I- Hull stabilization

Dredging $ 1,000

Prep, tow, hull work, reballasting (for local tow)$ 4,800

Total$ 5,800

PHASE II- Redecking

Exterior containment and deck removal$ 750

Interior containment and fitting removal$ 400

Steel work$ 400

Rehab and reinstallation of fittings $ 350

Teak Deck System estimate$ 1,500

Total $ 3,400

Envelope Rehabilitation Project Total $9.2 million


Interim repairs to delay inevitable dry docking and redecking

interim repairs to delay inevitable dry docking and redecking


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