12806_12811_Eckert_Bridges_Utility_Vault_Detail_-_ADDENDUM_TWO.pdf
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- Attached to
- Eckert Road Bridges 2147 and 2148– Boise River and Ridenbaugh Canal, Eckert Road and Boise Avenue Roundabout
- Solicitation number
- CT227-01
- Issued by
- Ada County, Idaho
About this file
This is an addendum document providing detailed construction specifications for a cast-in-place utility vault (609-025A) associated with the Eckert Road Bridges project managed by Ada County Highway District (ACHD) in Boise, Idaho. The utility vault is a reinforced concrete structure with specific dimensional requirements including a plan view measuring 4.0' by 5.0' with a depth of 4.5' to 5.5', designed to accommodate six 8-inch diameter holes for conduit connections. The vault specifications require #4 reinforcement bars with maximum 1.0-foot center-to-center spacing, minimum 3-inch concrete cover, a pedestrian-rated locking access lid cast to match surrounding slopes, and all outside edges chamfered or tooled at 3/4 inch. Metal reinforcement and welding must comply with American Welding Society D1.1 standards, and all work shall conform to Section 609 of the standard specifications for minor structures.
The vault lid, access lid, frame, hinges, and locking mechanism are specified as incidental to the concrete cost, with outside dimensions of the lid matching the vault exterior dimensions. All metal components and hardware are to be included within the cast-in-place concrete pricing with no separate bid line items. This addendum serves as a technical clarification document within the larger Eckert Road Bridges 2147 and 2148 project, which involves bridge reconstruction over the Boise River and Ridenbaugh Canal with a substantial completion deadline of June 21, 2028, and liquidated damages of $12,000 per calendar day for schedule delays.
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Text version
N.T.S.
DETAIL: UTILITY VAULT - 609-025A
PLAN VIEW
5.0'
4.0'
#4 BARS @
1.0' MAX. SPACING #4 BARS @
1.0' MAX. SPACING
B
6 EACH 8" DIA.
HOLES FOR
CONDUIT
CONNECTION
6 EACH 8" DIA.
HOLES FOR
CONDUIT
CONNECTION
LID DETAIL
CAST IN PLACE
PEDESTRIAN RATED
LOCKING ACCESS
CENTERED IN LID
SECTION B-B
0.5'
TYP
SEE LID DETAIL,
THIS SHEET
#4 BARS @
1.0' MAX.
SPACING
6 EACH
8" DIA.
HOLES FOR
CONDUIT
CONNECTION
5.5'
.3
UTILITY VAULT BOX NOTES:
B
1. CAST-IN-PLACE UTILITY VAULT SHALL
CONFORM TO SECTION 609 - MINOR
STRUCTURES.
2. ALL METAL REINFORCEMENT SHALL BE NO. 4
BARS WITH A MAXIMUM SPACING OF 1' CENTER
TO CENTER AND HAVE A MINIMUM CONCRETE
COVER OF 3".
3. ALL OUTSIDE EDGES TO HAVE 3/4" CHAMFER
OR TOOLED EDGES.
4. ALL WELDING SHALL MEET THE REQUIREMENTS
OF AMERICAN WELDING SOCIETY D1.1.
5. LID, ACCESS LID AND FRAME, HINGES, AND
LOCKING MECHANISM ARE CONSIDERED
INCIDENTAL TO THE COST OF CONCRETE FOR
THE VAULT.
6. OUTSIDE DIMENSIONS OF LID SHALL MATCH
OUTSIDE DIMENSION OF THE VAULT. CAST
THE LID TO MATCH THE SLOPES OF THE
MOMENT SLAB/SIDEWALK.
.5
M
IN
0.5'
6 EACH
8" DIA.
HOLES FOR
CONDUIT
CONNECTION
0.67'
0.67'
0.67'
0.67'
File details come from the government source that posted it. Updated .