FLOOD01851

• County: Jefferson
• Community: Golden
• Stream Name: Clear Creek
• Title: Major Drainageway Planning
• Date: 9/1/1982
• Prepared For: Jefferson County
• Prepared By: UDFCD
• Contract/PO #: &&
• Floodplain - Doc Type: Floodplain Report/Masterplan

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1-2

TABLE I-I

o To increase the channel capacity, approximately 1,300 1 inear feet of
the existing concrete channel walls should be raised to provide 1 foot
of freeboard above the 100-year flood water surface. Provisions should
be made for adequate drainage of the areas behind these flood walls for
both local drainage and a possible severe event in which the walls may
be overtopped.

COST SUMMARY
FOR IMPROVEMENTS IDENTIFIEIJ IN PHASE B REPORT WITHIN EACH JURISDICTION
JEFFERSON
ITEM CITY OF GOLDEN * COUNTY
CONSTRUCTI ON
Channel Improvement Costs $ 669,700 :Ii 55,000 $ 302,000
Floodproofing Costs ($ 115,000)
Channel Crossing Costs $ 710,000 $ 280,000
($ 30,000)
WTP & Maple St. Berm Costs ($ 160,000)
Utility Relocation Costs $ 95,000 $ 10,000 $ 20,000
Flood Emergency Plan ($ 25,000)
Subtotal Construction Costs $1,474,700 $ 345,000 $ 322,000
($ 330,000)
Engineering and Con-
tingencies (30% of $ 442,400 $ 103,500 $ 96,600
(Construction Costs) ($ 99,000)
Fiscal, Legal and Admin-
istrative (10% of $ 191,700 $ 44,900 $ 41,900
Above Total) ($ 42,900)
Property Acquisition Costs $1,514,000
Total Improvement Costs $3,622,800 $ 493.350 $ 460,500
($ 471,900)
MAINTENANCE
Annual Operation/ :Ii 25,950 $ 12,000 $ 73,700
Maintenance Cost

o A flow restrictor should be installed at the entrance structure for the
Farmers Hi ghl ine Canal conduit to 1 imit surcharge of the conduit and
overtopping of the canal channel downstream.

o Downstream from the brewery area, the south channel bank adjacent to
the Coors container facilities should be raised approximately 1 foot to
prevent overflow by the 100-year flood.

Due to the proprietary nature of the Adolph Coors Industries processes, the
details of the analyses at the Coors Complex is not to be disclosed at their
request. The engineering staff at Adolph Coors Industries will weigh the
benefits and costs of the various flood mitigation measures to determine the
course of action which best suits their needs and goals. In the interim,
the consultant recommends the establishment of a Flood Emergency Plan under
which critical facilities would be protected and equipment mobilized for
debris control. etc.

Reach 3 (McIntyre Street to Youngfield Street)
Removal and relocation of a drop structure is recommended at the Coors
Commod ities Transload bridge Just downstream of Mc Intyre Street to prevent
overflows. Construction of a drop structure is recommended at the Denver
Water Department conduit crossing to protect the pipel ines from washout.
Floodplain regulation is recommended for the remainder of Reach 3,

*

Co sts in parentheses in the 1 eft column represent costs for the inter im
plan of improvements for Reach 1 described in detail in the commentaries
for plan and profile sheets 1 and 2. Costs indicated in the right column
are improvement costs within the Coors Industries area, Reach 2, Station
850+00 to Station 885+00. Costs within Jefferson County include improve-
ments at the Coors Container Building area (Station 822+00 to Station
829+00) and at the Coors Commodities Transload area (Station 735+00).