24-13_-_Information_Letter_No._2.pdf

STATE OF CALIFORNIA – CALIFORNIA NATURAL RESOURCES AGENCY GAVIN NEWSOM, Governor

DEPARTMENT OF WATER RESOURCES

P.O. BOX 942836

SACRAMENTO, CA 94236-0001

TO ALL HOLDERS OF

BIDDING DOCUMENTS ON

FULL PIPE PENETRATION REPLACEMENT

DEFERRED MAINTENANCE PROGRAM

DAVIS – SITES 545 AND 549

STATE PLAN OF FLOOD CONTROL FACILITIES

DIVISION OF FLOOD MANAGEMENT

YOLO COUNTY

CALIFORNIA

SPECIFICATION NO. 24-13

CONTRACT NO. C51674

INFORMATION LETTER NO. 2

The following questions have been received for clarification. The Department of Water Resources (DWR) answers are given immediately following the questions.

Question No. 1 The Builder’s Risk Coverage Requirements do not specify whether

“All Risks” Coverage is required. Please clarify if Flood and Earthquake coverage are required.

Answer: Builder’s risk insurance is not required for this contract.

Question No. 2 What is the construction project duration? __________ Working

Days? Or ___________ Calendar Days??

Answer: The Contractor shall complete the work before the expiration of

July 31, 2025. Please refer to Section 01110 – Summary of Work paragraph 1.04 Time and Completion and refer to paragraph 1.07 Restrictions/Outages. The Days referenced in the specification are Calander days, unless otherwise indicated per Document 00700 – Abbreviations and Definitions, paragraph 2 Definitions.

Docusign Envelope ID: 52AB79EF-D733-426C-A381-98293537C8B7

1/28/2025

Specification No. 24-13 Information Letter No. 2

Question No. 3 Please confirm whether it is the Department's responsibility or the

Contractor's responsibility to provide Quality Control testing representatives/facilities and inspectors for material placement throughout the project.

Answer: The Contractor is responsible for all Quality Control testing and inspection throughout the project. Please refer to Section 02305 - Earthwork Testing, Section 02720 - Aggregate Base, Section 03150 – Waterstop, Section 03300 – Cast-In-Place Concrete, Section 03315 – Controlled Low Strength Material (CLSM), Section 09970 - Coatings for specific material testing requirements.

Question No. 4 Specification Section 03300 2.06 B.1 states, "The temperature of concrete placed shall have a temperature of not more than 65 degrees F and not less than 40 degrees F when measured at the point of placement per ASTM C1064. Other concrete placed shall have a temperature of not more than 80 degrees F."

Please confirm whether the required maximum concrete temperature at placement is 65 degrees F or 80 degrees F.

Answer: The temperature of concrete at point of placement shall not exceed

85 degrees F when measured per ASTM C1064. Refer to Addendum No.1, Section 03300 - Cast-in-Place Concrete, paragraph 2.06 B.1.

Question No. 5 Section 02305, 3.01.B.3.a.(3) – Says at least one sand cone for each nuclear density test. On previous DWR projects, the frequency of sand cone testing is minimum one per day and one test per 10 Nuclear Method tests. Please confirm the frequency of Sand Cone testing (ASTM D 1556).

Answer: At least one sand cone density testing is required per Section

02305 – Earthwork Testing, paragraph 3.01 B.3.a (3).

Question No. 6 Would it be acceptable to use pre-cast concrete boxes for the risers?

Answer: No, precast concrete boxes are not acceptable for riser unit.

Specification No. 24-13 Information Letter No. 2

Question No. 7 Could you please confirm whether the excavated soil should be reused or disposed of?

Answer: Please refer to Section 02300 – Excavation, paragraph 2.01 A

Suitable material and paragraph 2.01 B Unsuitable material from onsite excavation.

Please send any additional questions to doe_specs@water.ca.gov.

Sincerely, Lakshika Logantha, Senior Engineer Public Works Contracting Branch Division of Engineering Department of Water Resources mailto:doe_specs@water.ca.gov