200709 Falls Creek Report

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Gustavus Electric Company

P.O. Box 102 Gustavus Alaska 99826 (907) 697-2299 fax (907) 697-2355

TO:

Pat Regan - Regional Engineer

Ofce of Energy Projects - FERCDivision of Dam Safety and Inspection

Portland Regional Ofce

101 Southwest Main Street - Suite 905

Portland, Oregon 97204

SUBJECT:

September 2007 Monthly Report for the Falls Creek Hydro-electric Project

FERC # P-11659

DATE SUBMITTED:

10/20/07

DISTRIBUTION LIST:

Project Personnel Position Contact E-mail

Richard Levitt Project Manager [email protected]

Steve Manchester Construction Superintendent [email protected]

Bob Christensen Environmental Compliance [email protected]

Recipients Aency Contact E-mail

Ron Wright FERC [email protected]

Jim Ferguson ADF&G [email protected]

Sean Johnson ADF&G [email protected]

Doug Jenkins USDARUS [email protected]

Richard Enriquez USFWS [email protected]

Tomie Lee NPS [email protected]

Jackie Timothy DNR [email protected]


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Falls Creek Hydroelectric Project (P-11659)

MONTHLY CONSTRUCTION REPORT TO FERC

September 2007

1) Progress of Work - PM

This month work continued on the intake/diversion

structure and the installation/backll of the

HDPE penstock. Further work was done on the

interconnecting powerline. Some progress was made

on erosion and sediment control work along the intake

road.

2) Status of Construction - PM

During the rst week of the month, 2,500 feet of

interconnecting transmission line was installed along

the side of the access road. In conjunction with the

transmission line work, some of the roadsides were

sloped to nal grade and progress was made on rock-

lining uphill side ditches.

The powerhouse road in the area of the clearcut gravel pit was

relocated to the east along the east edge of the pit. This is the

route of the original plan for the road. The road was relocated so

that more area of the gravel pit would be available for material

extraction. More material has been needed as the bedding and

backll for the penstock than was anticipated. The material is also

being used as bedding and backll for the powerline.

HDPE penstock was installed from station 27+00 to station

41+00 this month. An additional 300 feet of 30 HDPE was

installed in excess of what was called for in the original plan.

Thi i b f dditi l t t l l th f th t k d t

Sloping along the lower portions of the access

road where the transmission line is buried.


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No work was done on the tailrace or in the

powerhouse area this month.

There were no inspections of the project this

month by FERC or any resource agencies.

3) Construction Difculties - PM

The additional length of 30 HDPE put the

reducer for connecting the 30 pipe to the

28 pipe in a curve of the pipe rather than a

straight section. This stressed the reducer

more than expected, so the reducer will beencased in concrete.

There were some minor equipment break-

downs this month which necessitated moving

from one phases of the job to another and then

back. Repair parts came quickly and the dif-

culties were minor.

5) Critical Events and Dates - PM

There were no critical events this month.

8) Sources of Major Construction Material - PM

All work done this month used material that has been described in previous reports.

9) Materials Testing and Results - PM

All backll material used this month was veried by the project manager as having been screened to remove

ll 1 i h l t i l C ti f th b kll t t d i th i th il b th d

Too much stress on this reducer damaged the connec-

tion. This joint will now be encased in a concrete block.


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11) Photographs - ECM

Ten photo vantage points have been

established throughout the project area to

document the progress of construction (see

Appendix 1). No visible changes occuredexcept at photo sites 7, 9, and 10. Precise

locations of photos were changed in some

locations to better display the new work.

12) Environmental Compliance Issues - ECM

Bob Christensen was on vacation during the

month of September. ECM duties were lledby Greg Streveler. This months ECM report

will be abbreviated for this reason.

Short-term pulses of high turbidity occured

a few times as a result of phase 2 intake

operations although recorded turbidiitys were

within acceptable parameters. In general,

the construction crew did an excellent jobof controlling sedimentation during phase 2

operations at the intake.

The foot print at the gravel pit expanded a bit

as a result of moving the powerhouse road

to the eastern side of the clearing. Efforts will

be made to work with the Project Manager to

insure that further impacts to important forest

habitats in this area are kept to an absolute

minimum.

13) C li I i N d f I di t

This cofferdam within a cofferdam was useful in control-

ling sedimentation of the creek.


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15) Biotic Monitoring - ECM

Salmon foot counts continued throughout the month. The peak pink salmon numbers observed for the year

came during the rst week of the month at 1,169. The rst cohos (very small numbers) showed up during the

very end of the month.

Some newly placed gravels in the engineered logjam area were lost downstream during higher ows. These

gravels will be replaced next year along with already scheduled gravel bed work and minor modications to the

woody structures next year.

The following sections are not yet applicable to the date of this report:

4) Contract Status6) Reservoir Filling

7) Foundations10) Instrumentation


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APPENDIx 1: SEPTEMBER 2007 PHOTOS FROM vANTAgE POINTS


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APPENDIx 2: qUALITY CONTROL ATTACHMENTS


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200709 Falls Creek Report

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