Attachment 5 - Reference Photo Montgomery Dam Gates 9 and 10 Install.pdf

MONTGOMERY DAM GATES 9 AND 10 INSTALL SYSNOPSYS

Work Synopsys The U.S. Army Corps of Engineers, Pittsburgh District, has a project that involves the installation of new dam lift gates and a new control system at Montgomery Locks and Dam, Ohio River, PA.

This contract is a continuation of the three previous gate replacement contracts. The contract generally includes installation of the last two dam gates, new control/camera systems and other repairs to the dam. The major features of the requirements are identified below:

The contract specifically includes:

a. Removal of existing dam Lift Gates 9 and 10 and associated components;

b. Pier 9, Pier 10, and Pier 11 machinery house modifications;

c. Pier 9, Pier 10, and Pier 11 track and sill modifications and miscellaneous concrete repairs;

d. Installation of new Government-Furnished dam Lift Gates 9 and 10,

e. Including associated lift chains and drive sprockets; repair and lubrication of the gate lifting equipment;

f. Installation of new roofs on all machinery houses;

g. Installation of new gate control and camera systems;

h. Clean and paint of the existing emergency bulkhead units;

i. Perform Gate Track No. 3 repairs.

The work is to be performed using the existing bulkheads stored at the project site. Installation of the new Lift Gates involves heavy lifting of the main gate leaf, end trucks, and associated components from a floating crane. All work will be performed form the contractors floating plant located downstream of the gates being replaced.

Disposal of lift gates and associated parts, concrete rubble, and electrical equipment will be required. Ferrous and all other construction waste material will be disposed of at commercially permitted facilities licensed to accept waste or recyclable materials as applicable.

Construction work will occur in close proximity to waterway traffic and operating lock and dam gates. The existing lock chambers are currently operated 24 hours a day, 7 days a week.

Pittsburgh District

Montgomery Locks and Dam

Entrance to Montgomery Locks and Dam Parking area

Looking Downstream at Middle Wall Dam Bridge looking at Machinery House under Construction

Overview of Locks Land Chamber Miter Gate

Walkway along Dam Bridge Abutment Weir

Dam BridgeDam Elevation (Typical Existing Gates to be Removed)

Removal of Existing Dam Lift Gates 9 and 10 and associated components

Machinery House 11 Inside Machinery House 11

Machinery House Typical Machinery and Electric Panels

Removal of Existing Dam Lift Gates 9 and 10 and associated components

Removal of existing dam Lift Gates 9 and 10 and associated components

Machinery House 10 Inside Machinery House 9

Removal of existing Dam Lift Gates 9 and 10 and associated components

Machinery House 9 (side view) Inside Machinery House 9

Removal of existing Dam Lift Gates 9 and 10 and associated components

Floor Grating inside Machinery House 10 Access thru Grating to Platform below Machinery House 10

Pier 9, Pier 10 and Pier 11 Machinery House Modifications

New Machinery House New Machinery House under Construction

Inside a New Machinery House Mezzanine Inside a New Machinery House

Inside a New Machinery House

Pier 9, Pier 10, and Pier 11 Track and Sill Modifications and Miscellaneous Concrete Repairs

Typical Concrete Work Typical Concrete Work

Pier 9, Pier 10, and Pier 11 Track and Sill Modifications and Miscellaneous Concrete Repairs

Typical Concrete Work Typical Pier Elevation

Installation of New Government-Furnished Dam Lift Gates 9 and 10

Top of Dam Gate Side of Dam Gate

Installation of New Government-Furnished Dam Lift Gates 9 and 10

Gate placed in Dam Pier Track Slot End Truck Assembly on Dam Gate

Associated Lift Chains and Drive Sprockets; Repair and Lubrication of the Gate Lifting Equipment

Lift Gate Machinery and Lifting Chain, there are 2 lifting machines in machinery house 10, and 1 lifting machines in machinery houses 9 and 11.

Lifting Chain

Looking Down thru Machinery Slot Lift Chain

Lifting Chain Lifting Chain attached to Machine

Installation of New Roofs on All Machinery Houses

Typical Roof for Machinery Houses

Installation of New Gate Control and Camera Systems

Control Panels inside Machinery House Control Panels inside Machinery House

Conduits entering Machinery House from Bridge Conduits entering Machinery House

Conduits to Machinery Conduits into Panels

Conduits entering Machinery House from Access Platform Lighting on Front of Machinery House

Conduits entering Machinery House from Access Platform Conduits entering Machinery House from Access Platform

Clean and Paint of the Existing Emergency Bulkhead Units

The cleaning of the bulkhead units will take place on the abutment side of the dam. There is limited access to the area from Highland Ave (pickup truck). You will have to drive across railroad tracks. You will not be able to get a vehicle all the way to the cleaning area.

Dirt road from Highland Ave Dirt road from Highland Ave after crossing railroad tracks

Bulkhead appears on right side of picture

Bulkheads cleaning area on abutment side of dam

Bulkheads cleaning area on abutment side of dam

Bulkhead Placed in Cleaning Area Bulkhead Steel Members

Bulkhead Steel Members Bulkhead Before Cleaning

PERFORM GATE TRACK NO. 3 REPAIRS

The Track Rail repair will take place on the left side of pier 3. This work needs to be done before Gate 3 can be put in service.

1. See drawing S-3278 for notes referring to field removal, shop repairs and field replacement of rail. This drawing also gives a suggested weld repair sequence.

2. The photos show the approximate location of repair work. For exact location of track repair work see drawing S-3277.