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U.S. Environmental Protection Agency, Region IX - page 7 / 97

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ATTACHMENT 1

Photograph Log for EPA’s 02/05/10 Site Visit to AZ DOT SR 179 Improvement Project –

Oak Creek Bridge to Chapel Road, Yavapai and Coconino Counties, Arizona All photographs were taken with a digital camera by Rebecca Glyn or Ellen Blake, CWA Compliance Office, EPA Region IX.

Oak Creek Bridge Site:

IMGP0002 – Title shot

IMGP0003 – Taken from top of Garland (east) slope of Oak Creek, looking west toward Tlaquepaque (west) slope, Oak Creek’s confined channel, and vehicular bridge. Note that steel girders have been removed from Garland slope after they were compromised during Jan 1520th, 2010 storm. Gator eels installed at toe of slope.

IMGP0004, 05 – Taken from top of Garland slope of Oak Creek, looking west toward Oak Creek channel and vehicular and pedestrian/utility bridges. Note imported materials used to build coffer dam in creek bed.

IMGP0006 – From north side of pedestrian bridge, looking north toward west braid of Oak Creek, upstream of bridges. Note sediment basin between creek and access road used for occasional filtering of sedimentladen water collected in coffer dam. Filter fabric is sagging from north side of basin, creating escape route for fine sediment. Onsite contractors noted that this sediment basin has never overtopped.

IMGP0007 – From northwest corner of project site at top of access road, looking east toward Garland slope and pedestrian bridge. Note sediment from access road deposited on rock bank adjacent to creek.

IMGP0008 – From under pedestrian bridge, west side of creek bed, facing Garland slope. Note imported boulders and gravel in creek bed work area.

IMGP0009 – Same as 8. Closer view of Garland slope.

IMGP0010, 11, 12 – From west side of creek facing east creek bank, north of pedestrian bridge. Sediment in vegetation is likely deposited from upstream sources.

IMGP0013 – From west side of creek channel, facing east. Close up of east pedestrian bridge abutment.

IMGP0014 – From west side of creek channel within coffer dam, facing Garland (east) slope. Krails installed after January 1922nd storm event.

IMGP0015 – From west side of creek channel, below vehicular bridge, facing south toward downstream direction of Oak Creek. Coffer dam along left edge of photo was installed prior to January 1922nd storm event.

IMGP0016 – From west side of creek channel, below vehicular bridge, facing north toward upstream direction of Oak Creek.

IMGP0017, 18 – From west side of creek channel, facing east to Garland slope. Krails were installed alongside pedestrian bridge abutment as temporary slope stabilization measure after January 1922nd storm event.

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