ESBD_367667_1723518007725_01-Addendum No. 1.pdf
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- Solicitation number
- CBBEP_2123_MRDCirculationEnhancement
- Issued by
- Refugio County, Bedford City, Texas
About this file
This document is an Addendum No. 1 issued by Yesenia Singleton, PE, Project Engineer for the Mission River Delta Circulation Enhancement project, which is being conducted by the Coastal Bend Bays & Estuaries Program, Inc. (Owner) in Refugio County, Texas. The addendum addresses several questions and clarifications related to the project, including the use of crane mats to protect existing vegetation, the acceptability of an elliptical pipe as a substitute for the specified 13.5" x 22" arched pipe, the purpose of the "Filter Fabric for wrap rock rip rap" bid item, and the details for the soil retention blanket and bollard placement. The contract opportunity was previously announced, with bids due on August 15, 2024, and a pre-bid meeting scheduled for August 1, 2024.
The project involves removing three existing concrete pipe crossings and damaged structures, and installing three new crossings at the same locations, including a single 14" rise x 23" span elliptical pipe, three 18" RCP pipes, and double 6' span x 2' rise box culverts. The work also includes minor excavation, bulk rock for soil stabilization and erosion protection, and Type A, Grade 1-2 base material for trail surface on top of the new pipe crossings. The contract will be awarded by the Coastal Bend Bays & Estuaries Program, Inc.
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Addendum No. 1
Yesenia Singleton, PE Project Engineer
Date: August 12, 2024 Project: Mission River Delta Circulation Enhancement
LJA Project No. C285-22106.Task1 Client: Coastal Bend Bays & Estuaries Program, Inc
Prospective bidders are hereby notified of the following modifications to the contract documents.
These modifications shall become a part of the contract documents. The provisions of the contract documents not specifically affected by the addendum shall remain unchanged.
I. QUESTIONS/CLARIFICATIONS
1. It was mentioned during the pre-bid meeting that all existing vegetation needs to be protected. Do crane mats on the ground count as protecting the vegetation? Will we be able to create a turnaround/staging area at each crossing utilizing the crane mats so that equipment and trucking can come in and out? Yes, board mats can be used to make staging areas at the crossings on top of the vegetation, while the vegetation may be temporarily affected, the board mats main purpose is to prevent rutting the soil. After construction is complete, the area should be returned to pre-construction contours.
2. Bid Item 8, is the (13.5" X 22" arched pipe) equivalent to elliptical pipe an acceptable substitute? Yes
3. Bid item 12 "Filter Fabric for wrap rock rip rap" is not referenced in drawings. Unclear what that is referring to. This will be used to wrap the crushed limestone base material on top of the existing road.
4. Bid item 13 on the bid form refers to "flowable backfill" with a quantity of 10 CY. I don't see this referenced in the drawings as the other materials in the bid form are. This is alternate material in lieu of the 3” crushed limestone base under the piping for the contractor’s constructability.
5. Bid item 19 "reshape/regrade ditch" referring to either side of the new crossings? Yes, minimum excavation on both sides of the ditch to allow water circulation varies from 2’ min to 18’ max, refer to section B-B in each crossing.
6. Bid Item 20, Where is a soil retention blanket required? The soil retention blanket may be needed for soil stabilization and permanent erosion protection on the roadway side slope.
7. Bid Item 21, Where are the bollards to be placed and what are the details for setting them? Four (4) wooden bollards with delineators, size 2 per each crossing, TxDOT standard detail. (See details on next page).
Please acknowledge receipt of this addendum in the appropriate place in your PROPOSAL
FORM.
End of Addendum No. 1
ADDENDUM NO. 1
COASTAL BEND BAYS & ESTUARIES
MISSION RIVER DELTA CIRCULATION ENHANCEMENT
DELINEATOR & OBJECT MARKERLJA ENGINEERING
TEXAS ENGINEERING FIRM F-1386
Addendum No. 1
| Date: August 12, 2024 |
| End of Addendum No. 1 |
| ADDENDUM NO. 1 |
| 02-Delineator Detail-Exhibit.pdf |
| Sheets and Views |
| Exhibit |
| Delineator Detail-Exhibit.pdf |
| Sheets and Views |
| Exhibit |
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