Beside the information attached we sent the Union Pacific Railroad a set of the plans.

If there is more information we can provide, please contact us.

Sincerely,

DUTRA DREDGING COMPANY

Robert D. Johnston
President

RDJ/lgd

-42' NAVIGATION IMPROVEMENTS, OAKLAND INNER/OUTER HARBOR
INSTALLATION OF 20" DIP SEWER LINE
PERMIT TO CONSTRUCT, UNION PACIFIC RAILROAD YARD
CONSTRUCTION DOCUMENTS

TABLE OF CONTENTS

EXECUTIVE SUMMARY

As part of the Oakland Harbor Deepening Project, Dutra Dredging Company must relocate and install a new 20" DIP sewer force main. The sewer line work consists of installing the new main from a valve box on the Alameda Bank, across the Oakland Estuary, beneath a rail line in the UPRR Oakland Intermodal Yard, and to an existing valve box on that property. The new line will replace the existing 16" line currently in use.

Work that will occur on UPRR's property includes:

• Jacking and boring a 42" X Liz" seamless steel casing beneath one track
• Installing shoring on the land and water side for the casing
• Installing the cast iron pipe adjacent to the track
• Installing a new valve box
• Tying in to the existing valve box
• Excavation, backfilling and compaction associated with the above items

Work on UPRR property will be contained within a 40' wide (North-South) by 140' long (east- west) area as shown on the attached Figure 1. A cross section of the work is shown on Figure 2. Within this area, the sequence of work will be as follows:

We expect to have the following equipment on site at different times during construction:

• Caterpillar 225 (or smaller ) excavator
• Caterpillar IT I 8B Loader/Forklift
• Hand and Roller Compactors
• Dump trucks on and off site to haul and place bedding rock
• Concrete trucks and pumps (one day)
• Various flat bed trucks and pickups
• Small crawler crane (for pile driving operations only)

This submittal encompasses all of the information and documentation we feel the UPRR needs in order to complete the permit to construct. Attached are the following documents:

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Figure 1       Oakland Bank

               NOTE:  FOR A MORE DETAILED PLAN SEE SHEET 9


   [This document is a plan drawing of the Navy Sewer Line crossing under the
   Union Pacific Railroad track.  It identifies sections AA and BB along the
   sewer line, and it shows secton EE as a cross section approximately
   perpendicular to the railroad line.]

   [It has the following additional notes:]

        PILE/PLATE
        SUPPORT        [This note is near the South East corner of the work.]
        (MINIMUM 10'
        RAIL)


        NO                       [This note is on the North side of the RR
        SHEETPILE NEEDED HERE    track]
        (MINIMUM 10'
        RAIL)







Figure 2       Oakland Bank Profile
Section E-E


   [This document is a cross section drawing of the Navy Sewer Line crossing
   under the Union Pacific Railroad track.  It appears to be the section EE on
   Figure 1 that is running approximately perpendicular to the railroad line.]








Union Pacific Railroad Co.
General
Shoring
Requirements

    [This document appears to contain information that must be supplied showing
    compliance with the railroad's shoring requirements, called out on sheet 8
    of 20 in the contract plans for the Oakland Harbor Project, requiring the
    contractor to obtain a permit from UPRR.  This document has the following
    note:]

       Plans of shoring to be submitted to General Director-Design for
       approval prior to excavating.  For excavations which encroach into
       railroad live load surcharge zone, shoring plans to be accompanied by a
       copy of the design calculations, and both to be stamped by a registered
       professional engineer.

       Shoring is subject to approval of General Director-Design who reserves
       the option of imposing more stringent requiremetns as conditions
       warrant.

       All dimentions measured at right angle to track.


    [There is a cross-hatched symbol that shows slope material adjacent to the
    railroad and this symbol is identified as follows:]

       Shoring for excavation to be designed for railroad live load surcharge
       in addition to soil pressure.










                            OPERATION PLAN









                    OAKLAND -42' NAVIGATIONAL IMPROVEMENTS

               INSTALLATION OF 20" DUCTILE IRON PIPE SEWER LINE

The following is a description of the procedures involved with the installation
of the new 20" diameter sewer line, required testing, connection of the new
sewer line, the disconnection of the existing 16" line, and the removal and
disposal of the existing 16" sewer line to the extent shown on the plans and
stated in the specifications.

Railroad Crossing

The railroad tracks in the Union Pacific Intermodal Yard on the Oakland
Bank, in the vicinity of the new sewer line location (E 1,476,755.961, N
476,656.096), will be protected on both sides as required. On the north side
of the tracks, a sheet pile wall will be driven at least 10 feet off the tracks to
protect and support the railroad tracks from the trenching that will be
required in that area. On the south side of the railroad tracks a H-pile and
steel sheet lagging wall will be installed as necessary, at least 10 feet off the
railroad tracks to protect the tracks from any jetty rock removal and
trenching that is needed to install the new sewer line.

The design and shop drawings for the sheet pile wall and H-pile walls are
attached.

A complete and thorough check for any and all utilities that are in the work
area will be accomplished prior to any work being performed. All utility
companies involved will be notified and informed as to the limits of the work
area.

The first phase of work will be to install the sheet piles and H-piles. To
accomplish this a truck crane or crawler crane of adequate size will be
brought in along with the appropriate impact hammer, piledriving leads,
driving head, and any material for a driving template that is required. The


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asphalt concrete in the area of the sheet pile wall and also any areas that
require trenching, will be saw cut and removed. The work area on the
Oakland Bank is approximately 140' by 75', and 250' by 135' on the
Alameda Bank. Work will commence on the Oakland Bank first. After the
pile locations have been surveyed in, the H-piles will then be driven first.
After completion of the H-pile driving, the sheet piles on the north side of the
tracks will then be driven to the required depth.

At the completion of the pile driving, the boring and jacking subcontractor
will come in and open up the jacking trench. After the trench is opened up,
the jacking subcontractor will install the 42" steel casing under the railroad
tracks. At this point, Dutra Dredging Co. will begin work on both banks,
opening up the required trenching for the installation of the new 20" sewer
line, and associative valve boxes and required thrust blocks. The landside
piping and all new valve boxes, thrust blocks, and valves will be installed to
the extent possible at this time.

Underwater Trench

Concurrent with the landside work, The Derrick Barge #24, or other
available dredge, will begin dredging the underwater portion of the pipeline.
The trench for the new 20" sewer line is at a 50' offset to the east of the
existing 16" line. The landside limits of the existing 16" line will be marked
prior to excavation of the new trench. The location of the existing 16" line
and the limits of the new trench will be plotted into the Hypack Positioning
system on the dredge to show the dredging template for the trench while
also maintaining a safe distance from the existing sewer line. The dredging
will commence on or about the 4th of June so that approximately four loads
of material will go to the ocean disposal site for the plankton study. The
remaining sand removed from the trench excavation will be stockpiled,
space permitting, for backfill after the pipe is installed. The trench will be
excavated from elevation -38 to elevation -57, within the limits of the
channel boundaries, with side slopes large enough to maintain the integrity
of the trench. Once the channel limits of the trench have been excavated,
the slopes up to the Jetty limits will be excavated. On both banks, the


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landside equipment will begin to remove the rock from the jetty and begin
excavating the trench down the slope to the approximate elevation of -10
MLLW.

During the dredging phase, the trench will be surveyed on a daily basis to
ensure that the trench is remaining open and staying true to grade.

The new 20" pipe is scheduled to be delivered to Alameda the week of July
1 st. The pipe will be delivered to the construction area on the Alameda
Bank, off loaded with a crane, and stockpiled in the construction area.
When the trench excavation is nearing completion, the pipe will then be
assembled on rollers, on the Alameda Bank.

There are two methods of installation under consideration at this point. The
first and most common method of installation for this type of pipe is to pull
the pipe. Once the trench has been completed, a final survey will be
performed to check the trench for both alignment and grade. A factory
supplied pulling head will then be attached to the pipe. A winch, stationed
on the Oakland side of the estuary, will then run its wire through the trench
to the Oakland Bank and be secured to the pulling head. The pipe will then
be pulled from the Alameda bank, into the trench, and will end up at the toe
of both jetties. At this point the pulling head will be removed. The trench
will then be surveyed again, over its entire length, to ensure that the pipe is
in the proper location and at the proper elevation.

A Notice to Mariners will be issued prior to the pipe being pulled across the
estuary. The estuary will be off limits to vessel traffic during the pulling
operation until the pipe is securely in place on the bottom. The pulling
operation will take place at off peak hours so as to minimize any effect on
vessel traffic through the area.

The pipe running down the slopes through the 42" pipe casings will then be
installed from land with a crane. The final connections at the toes of the
jetty will be made underwater with the use of divers.


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A second method of installation under consideration will be to lay the pipe
off a barge from one bank to the other. The pipe would be assembled on
the deck of the barge, set in the water and sloped down to the trench as the
barge moved from the Oakland Bank to the Alameda Bank. This method of
installation would be a continuous process until all the pipe had been
installed. The final connections at the toes of the slope would again be
made with divers.

After all the pipe has been installed, joints completed, and the thrust blocks
have been in place for at least five days, the pipe will be prepared for the
pressure test. The pipe will be filled with water to expel all the air and tested
to 150 percent of the working pressure for a period of one hour. The
hydrostatic pressure and leakage tests will be performed by an independent
testing laboratory familiar with this type of test. The Contracting Officer will
be informed prior to the test so that he may witness the tests if so desired.
Complete test results will be forwarded to the Contracting Officer upon
receipt from the testing laboratory. Only water from the top portions of the
pipe will be drained out after the tests. The water will remain in the lower
limits of the pipe until after its hookup with the system.

Backfilling Trench

After completion of a successful pressure and leakage tests, the pipeline will
be backfilled, starting with the underwater portion first. The Derrick Barge
#24, or other available derrick barge, will begin filling in the trench with the
dredged material, or new sand as required, up to elevation -52.5 MLLW
(+4", -0"). Once the sand level elevation has been verified by a
hydrographic survey, the derrick barge will begin setting the bedding stone.
Both the bedding stone and the armor stone will be purchased from the San
Rafael Rock Quarry and delivered to the job site via barges. The bedding
stone will be placed either by tremie or by a chute to minimize segregation.
The bedding stone will be placed to its full layer thickness (elevation -52.5
MLLW to -51.5 MLLW, +6", -3") in one operation. The final elevation of the
bedding stone will again be verified by a hydrographic survey. Finally, the
armor stone will be set by the derrick barge using a clamshell bucket or skip


                                       4




box. The final elevation of the armor stone will be elevation -49 MLLW (+/-
6") and will also be verified by a hydrographic survey. This will complete the
backfilling of the underwater portion of the pipeline.

Prior to any backfilling on land, plastic marking tape will be installed on all
pipe that is on land and on the side slopes of the channel down to the toe of
the jetties. The tape will be installed directly above the pipe at a depth of
18" below finished grade in all areas where it is practible to do so.

The bedding stone will have been placed in the bottom of the trenches prior
to any pipe installation on land. The sand layer will then be placed on top of
the pipe and compacted with a vibratory smooth-wheel drum or base plate
compactor. A one foot layer of bedding stone will be placed on top of the
sand. A second layer of sand (1'-6") will then be placed on top of the
bedding stone and again will be compacted. A final layer of earth backfill
will be placed on top and compacted by hand operated machines to at least
90% maximum dry density. In areas where any blacktop or gravel was
removed, it will be replaced in kind.

Where the pipe casing runs through the jetty, the casing will be set on a
sand base for leveling, and sand will also be put inside the casing to fill in
around the 20" pipe. The jetty stones will be replaced where they were
removed for the work.

Final Connection of Sewer Line

With the sewer line completely in place, including all new valve boxes, gate
valves, etc., the line will be ready for a hookup to the existing 16" line on
both banks. Prior to disconnecting the existing 16" line, the sewer line will
need to be adequately flushed. This action will be coordinated between the
Government and the U.S. Navy.

The trench in the areas of the existing valve box tie-ins on both banks will be
lined with plastic. This will contain any water that leaks out during
disconnection of the existing pipe from draining into the soil. A pump truck


                                       5




will also be in the immediate vicinity during the disconnection to immediately
remove any water that does leak out of the existing 16" pipe.

According to the specifications, there will be a three-hour time period in
which to connect both ends of the new line into the system. The time will
commence at midnight on Friday and end at 3:00 A.M. on Saturday with the
new 22" sewer line being operational. Crews will be working on both banks
to make the connections into the existing system. Communication with the
respective sewer treatment facilities affected by the connection process,
would be maintained at all times throughout the project. If for some reason
the connection cannot be made in time, the old system will be hooked back
up until the problem can be solved. If the connection can be made, but
more time is needed, pump trucks will be called in or other arrangements
will be made according to the affected treatment plants requirements.

Once the final connections have been made and the new line is operational,
the final backfilling in the areas of the connections to the existing system will
be accomplished. The sheet piles and H-piles will then be removed and the
areas on both banks will be cleaned up.

Removal of Existing 16'l Line

The existing 16" sewer line will be removed to the extent shown on the
plans. The material will be dredged from on top of the line to the limits of
the channel as shown on the plans. The pipeline will then be jetted by
divers and the line will be disconnected from the portion that remains. The
pipe that remains will be capped off and filled with concrete as required.
The pipe that is to be removed will be jetted off by divers and pulled out in
sections.









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