TECHNICAL MEMORANDUM
Rock Creek Post Flooding Pictures
PREPARED FOR:
UDFCD
Town of Superior
COPY TO:
PREPARED BY:
CH2M HILL
DATE:
September 20, 2013
PROJECT NUMBER:
418389
The photos shown below were taken on September 19, 2013. These images show the improved section of
Rock Creek between Rock Creek Parkway and West Flatirons Crossing Drive adjacent to the Town of
Superior Wastewater Treatment Plant.
Pedestrian Bridge
Both Photos Looking Upstream at the Pedestrian Bridge
Upstream Concrete Log Drop with Flow Splitter Structure
Left: Looking at the flow split towards the overbank area
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Right: Looking upstream of the flow splitter
COPYRIGHT 2013 BY CH2M HILL, INC.  COMPANY CONFIDENTIAL
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ROCK CREEK POST FLOODING PICTURES
Log Drops
Photos showing two different log drops
Overbank Area
Left: Overbank flow back into Rock Creek Mainstem
Right: Looking upstream towards the flow splitter
Trees and Debris in the Overbank
Left: Tree knocked over during flood event
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Right: Large debris in overbank
COPYRIGHT 2013 BY CH2M HILL, INC.  COMPANY CONFIDENTIAL
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ROCK CREEK POST FLOODING PICTURES
Downstream Overbank Area at Concrete Wall
Left: Looking upstream
Right: Looking downstream
Downstream Concrete Log Drop
Left: Looking downstream towards Concrete Log Drop
Right: Looking upstream
Summary:

All log drop and concrete log drop structures are intact

No damage at the pedestrian bridge

Erosion upstream of the log drop/flow splitter structure and downstream of the flow splitter into
the overbank

Cobbles deposited immediately downstream of the upstream concrete log drop, raising the channel
invert

Erosion at the concrete wall in the downstream overbank area

Bank erosion near the downstream concrete log drop structure
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COPYRIGHT 2016 BY CH2M HILL, INC. • COMPANY CONFIDENTIAL
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