2017-04-20_GENERAL DOCUMENTS - M1992069

• Permit No: M1992069
• IBM Index Class Name: General Documents
• Doc Date: 4/20/2017
• Doc Name: Returned Mail
• From: USPS
• To: DRMS
• Email Name: PSH
• Media Type: D
• Archive: No

Year/ Description of Conditions/Events
Time Frame
2013 (September) • Flooding causes flow to overtop the Cache La Poudre bank, flood
the F Street agricultural field and breach the Boyd-Freeman Ditch
embankment and the pipeline.
o A section of pipeline is breached and washed out.
o Repairs to the pipeline were made by and paid for by the
BIC, including on the east side of the pipeline embankment
(Al side). The cost of the repairs was approximately
$80,000.
o The location of the damage and repairs was the same general
location as where the major pipeline breach later occurred in
2014.
o No headcut formed on the F Street agricultural field in 2013.
2014(June) • Flooding causes flow to overtop the Cache La Poudre bank, flood
the F Street agricultural field and breach a section of the Boyd-
Freeman Ditch pipeline and its embankment.
o Major deposition of eroded material occurs on the east side
(Al side) of the pipeline breach.
o Major erosion/headcutting occurred on the F Street
agricultural field.
o The headcut advanced from the breach through the F Street
agricultural field and to within approximately 150 feet east
of the concrete path located cast(on outside bend)of the
river.
2015 • The City/BIC contracted with Olsson Associates to develop a design
for temporary repairs associated with the breached pipe
embankment. The temporary repairs include the following:
o Riprap armor across the width of the breach which remains
open.
o Installation of a new siphon for the pipeline below the grade
of the breach invert.
o Installation of sheet pile across the width of the breach.
o (Note: The temporary repairs described above will be
removed after repairs and regrading of the F Street property
occurs and the pipeline is restored to its historic grades).
• In addition to the temporary repairs at the embankment breach
location, the City also installed sheet piling on the eastern side of the
concrete bike path to protect against future headcutting advancing to
the west of the bike path.
• Total cost for both projects(breach repair and installation of sheet
piling at bike path): approximately$900,000.
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