C150052 Feasibility Study

• Contract/PO #: C150052
• Contractor Name: Tunnel Water Company, The
• Contract Type: Loan
• Water District: 3
• County: Larimer
• Bill Number: EIA
• Loan Projects - Doc Type: Feasability Study

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Station 14 + 70 to 15 + 07
Station 19+89 to 19+97

The work includes installing the pipe, constructing temporary bulkheads, filling the annulus with cellular
concrete, contact grouting between the pipe and cellular concrete, conventional void grouting approximately 5'
above the existing support, and construction of shotcrete transitions and aprons. The work wii' include
approximately 200 yards' of celluiar concrete, 170 yards' of conventional grout, and 20 yards' of shotcrete.

1.18 REPAIR CONCRETE liNED SECTIONS WITH 5HOTCRETE AND GROUT

Furnish ail equipment, iabor, and materials to repair approximately 204 lineal feet of existing concrete liner with
shotcrete and grout. The concrete liner occurs in five sections as follows:

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Station 7 + 93 to 8 + 98
Station 14+51 to 14+70
Station 15 + 07 to 15 + 38
Station 16+18to 16+41
Station 17+06to 17+32

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The work includes placing approximately 56 yards' of shotcrete and approximately 215 yards' of conventional
cement void grouting extending 5'above the concrete crown.

1.19 SHOTCRETE AND ROCK BOLTS

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Furnish all equipment, iabor, and materials to install approximately 85 iineal feet of pattern rock bolts and
placing a 3" nominai layer of shotcrete from approximately spring line to spring line in various areas between
Stations 20+00 and 52 + 73. The work includes installing approximately 70 6-foot long rock bolts with
associated nuts, bearing plates, 28 mine straps, and placing approximately 20 yards' of shotcrete.

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1.20 TRASH RACK AND STEEL DOOR

Furnish all equipment, labor, and materials to fabricate and install a trash rack and steel door at the eastern
tunnel portal. The door will be designed to limit unauthorized access, but allow periodic equipment access for
maintenance and inspection. The Contractor shall submit shop drawings detailing the structure.

1.21 REPAIR DEFLECTION WALL

Furnish all equipment, labor, and materials to repair the exiting deflection wall outside the eastern portal. The
work includes placing approximately 20 yards' of shotcrete on the existing concrete walls, placing approximately
60 yards' of grouted riprap, and placing approximately 45 yards' of D50 - 18" riprap in the stilling basin.

1.22 REGRADE AND RESTORE STAGING AREA AND ACCESS ROAD

Furnish all equipment, labor, and materials to regrade and revegetate the access road and the staging area. The
work includes approximately 3.3 acres of land, removing the culvert extension, removing gravei road base from
25% of road, ail silt fences and straw bales, and seeding with the designed seed mix.

END OF SECTION

Section 01010. Page 4 of 4

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