Questions_and_Answers_Received_Against_191BWC19B0002.pdf

PDF 63 KB Posted

Attached to
Vado West Floodplain Repair Federal contract opportunity
Solicitation number
191BWC19B0002
Issued by
International Boundary and Water Commission U.S.-Mexico

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Q&A's

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Questions Received Against 191BWC19B0002 – Vado West Floodplain Repair

Q1: Specification 31.36.13 Gabions, Page 4&5, 2.3 Stone Fill, A2. Requires the Los Angeles Abrasion shall not exceed 15% loss of weight after 500 revolutions. This criteria is not found in this local region. All the local region LA Abrasion is within the 20-25% loss of weight after 500 revolutions.

Will IBWC allow the 20-25% loss of weight criteria?

A1: Yes. Technical Specifications Section 31.36.13 2.3 A.2. has been revised in the updated specifications.

Q2: Specification 31.36.19 Reno Mattresses, Page 4&5, 2.3 Stone Fill, A2. Requires the Los Angeles

Abrasion shall not exceed 15% loss of weight after 500 revolutions. This criteria is not found in this local region. All the local region LA Abrasion is within the 20-25% loss of weight after 500 revolutions. Will IBWC allow the 20-25% loss of weight criteria?

A2: Yes. Technical Specifications Section 31.36.19 2.3 A.2. has been revised in the updated specifications.

Q3: There is a problem in section 32.92.19 Vegetation for Erosion Control under Criteria for

Determining Stand Establishment 3.8, “weeds include all non-grass plants”. All of the plants in the floodplain seed mix are non-grass plants, I wanted to bring this to your attention.

A3: Technical Specifications Section 32.92.19 3.8 A.1. has been revised in the updated specifications and A.2. has been added to hopefully clarify our intent. The question brings up an unintended conflict. All items seeded with the floodplain seed mix are excluded from "weeds."

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