Specifications_Arapaho_140F0622Q0127.pdf
PDF 150 KB Posted
- Attached to
- CO-ARAPAHO NWR- ANTELOPE DAM REHAB MATERIALS
- Solicitation number
- 140F0622Q0127
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Other files
| File | Type | Posted |
|---|---|---|
| Sol_140F0622Q0127_Amd_0002.pdf | ||
| Sol_140F0622Q0127_Amd_0001.pdf | ||
| Sol_140F0622Q0127_1.pdf | ||
| Riprap_Specifications.pdf | ||
| Sol_140F0622Q0127.pdf |
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Text version
Specifications for Riprap and Road Materials at Arapaho National
Wildlife Refuge to Reinforce Antelope Dam
Solicitation to deliver 320 tons of Type M Riprap and 200 tons of Colorado Class 6 road grade material to the
Arapaho National Wildlife Refuge, 953 CO Rd 32, Walden, CO 80480. All delivery fees are to be included in pricing. Deliveries are to be stock piled (spot dumped). Weight tickets are required for each delivery. Delivery is requested as soon as possible after award.
Type M Riprap Gradation Requirements identified below, defined by the Urban Drainage and Flood
Control District’s “Drainage Criteria Manual”, Volume 1.
"Rock shall consist of hard, dense, durable quarry stone, angular in shape, well-graded, and resistant to weathering. Rounded stone or boulders will not be accepted as riprap material. The stone shall have a specific gravity of at least 2.5.”
Table MD-7 Classification and Gradation of Ordinary Riprap"
Riprap Designation
% Smaller Than
Given Size by
Weight
Intermediate
Rock
Dimensions
(inches)
D50 (inches)*
Type M
70-100 21
12 50-70 18
35-50 12
2-10 4
*D50 = mean particle size (intermediate dimension) by weight.
Road aggregate Class 6, as defined by CDOT Standard Specification, Division 703.4, Aggregate for Bases, table 703-2, CLASSIFICATION FOR AGGREGATEBASE COURSE below:
Sieve Size
Mass Percent Passing Square Mesh Sieves
LL not greater than 35 LL not greater than 30
Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7
150 mm (6") 100
100 mm (4") 100
75 mm (3") 95-100
60 mm (2 ½") 100
50 mm (2") 95-100 100
37.5 mm (1 ½”) 90-100 100
25 mm (1") 95-100 100 100
19 mm (3/4") 50-90 95-100
4.75 mm (#4) 30-65 30-50 30-70 30-65
2.36 mm (#8) 25-55 20-85
75 m (#200) 3-15 3-15 20 max 3-12 3-15 3-12 5-15
NOTE: Class 3 material shall consist of bank or pit run material.
Specifications for Riprap and Road Materials at Arapaho National
Wildlife Refuge to Reinforce Antelope Dam
Evaluation of quotes will be based on past performance, lead time, and total price.
QUOTES AND QUESTIONS MUST BE EMAILED TO:
jeremy_riva@fws.gov, by the RFQ closing date and time.
mailto:jeremy_riva@fws.gov?subject=RFQ%20for%20140F0622Q127
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