FLOOD00189

• County: Denver
• Community: Denver, Lakewood
• Stream Name: Weir Gulch Tributaries
• Title: Major Drainageway Planning
• Date: 7/1/1978
• Prepared For: Denver County
• Prepared By: UDFCD
• Contract/PO #: &&
• Floodplain - Doc Type: Floodplain Report/Masterplan

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CHAPTER VI
CONCLUSION AND RECDr1folE'![)ATlON

concrete box. It is also recommended that the existing 42 inc~ culvert
east of Stuart Street is replaced with an 8 feet by 10 feet concrete hox.
The rep 1 aceITEn t of a 6 feet by 8 feet box cul vert with an S feet by
10 feet box culvert and the replacement of a 48 inch diameter pipe with
a 54 inch diameter pipe is an expensive and controversial proposal.
During the final design phase the contributing area south of 1st
Avenue and east of Sheridan Blvd. should be analysed in detail for its
contrib:ltion to the runoff into the existing 1st Avenue drainageway.
Intercepting runoff from tlis area with inlets along 1st Avenue could
reduce the peak flow along the 1st Avenue drainageway and make the
replacement of culverts unnecessary. However, a larger conduit within
1st Avenue may be required.

A. GEtIERAL
Th2 Phase B Report is based on the recommendations given in Phase A
of this study and comments received from representatives of the oarticipating
entities. Larger diameter pipes buried at greater depth, greater detention
ponds, more drop structures in open channels, more closed conduits,
greater right of way requirements, and inflation adjusted prices resulted
in hiqher estimated construction costs than shown in the Phase A Report.
Recommended priorities for implementation of the improvements are discussed
in the following paragraphs. For a successful solution to t'le drainage
problems, close coordination bet~/een the Cities of Denver and Lakewood
is absolutely necessary.

B. 1ST AVENUE TRIBUTARY
The construction of the detention oonds is recommended as first priority
for the area west of Sheridan Blvd. The detention ponds will reduce the
amount of flooding to be expected in the depression of Sheridan Blvd. at
1st Avenue. The replacement of undersized culverts and construction of
the connecting open channel and conduits could follow later.
To reduce ponding at the depression of Sheridan Blvd. and 1st Avenue,
the installation of additional catch basins at this location is recommended
as a high priority. Installing a 54 inch diameter conduit to close
the open channel just east of Sheridan '31vd. and in the vicinity of \~olf
Street could follow later. To provide sufficient capacity for the 100-year
design flow it is necessary to replace the 48 inch diameter culvert east of
Wolf Street with a 54 inch diameter pipe. The 6 feet hy 8 feet concrete
box crossing Stuart Street should also be replacer: by an 8 feet hy 10 feet

C. DAICOTA AVENUE TRI BUTARY
For the reach west of Harl an Street the constructi on of detenti on
pondS with the outlet conduit south and west of Villa Italia Shopping
Center should be a first measure.
In the reach from Sheridan Blvd. to Harlan Street, the grading
between Eaton and Depew Street should receive first priority to reduce
flooding of adjacent properties. Construction of channel and drop
structures coul d follow.
The installation of catch basins, connected to the existing pipe,
in the vicinity of Alaska Avenue and Yates Street combined with an improved
inlet structure immediately west of Sheridan Blvd. \~ould reduce the amount
of fl oodi ng bet\1een l'Jei r Gul ch and Sheri dan r,l vd.
Construction of the proposed additional conduit would follow as a
second priority.

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