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Bidjugde
JOB
West Yuma Mesa Storm Drainage Discharge System Improvement
BID DATE
12/12/14 - 1:30
AGENCY
Yuma County
ESTIMATE
$575,000
SCOPE
The work covered by these Supplementary General Conditions and Special Provisions includes construction of the following major items:  12th Avenue Spillway o Excavate a flood retention basin with riprap lined inlet channel o Construct a concrete lined spillway outlet to the USBR East Main Canal o Construct storm drain from 12th Avenue into the basin o Construct drain line from the basin to the canal o Construct guard rail and barrier  6.5 Street (14th Avenue) Spillway o Excavate a flood retention basin with diversion berm o Construct a concrete lined spillway outlet to the USBR East Main Canal o Construct storm drain from 13th and 14th Avenue into the basin o Construct drain line from the basin to the canal o Construct guard rail and barrier  Sunset Mesa Retention Basin o Construct a concrete weir wall on the existing concrete lined spillway outlet to the USBR East Main Canal o Construct a concrete apron on the existing concrete lined spillway inlet  Vista Del Valle Detention Basin o Excavate to lower the bottom of the existing detention basin o Place fill to raise the embankment at low areas o Remove and reconstruct a larger concrete lined spillway outlet to the USBR East Main Canal o Construct a concrete extension to the existing inlet spillway o Construct a retaining wall at the existing inlet spillway o Extend the scupper inlet spillway at the southeast corner of the basin o Place ABC on the access roadway and ramp o Install guard rail o Install fencing and barrier

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