M 41-10 Page 8-75 Monument Cases 8-138-13 Monument Cases
8-13.1 Description
This Work consists of furnishing, placing and adjusting monument cases and covers, in accordance with the Standard Plans and these Specifications and in conformity with the lines and locations shown in the Plans or as staked.
8-13.2 Materials
Materials shall meet the requirements of the following sections: Commercial Concrete 6-02 Crushed Surfacing Base Course 9-03.9(3) Monument Cases and Covers 9-22.1
8-13.3 Construction Requirements
8-13.3(1) Monument Case and Cover
The concrete base shall be placed on a well compacted foundation. The placing of the monument case and base shall be performed in a manner that will not disturb the monument. The monument case shall be installed by the Contractor after the final course of HMA has been placed. After the monument case has been in place for a minimum of 3 days, the Roadway surface shall be patched in accordance with Section 5-04.3(7) . When the monument case and cover are placed in cement concrete pavement, the concrete base will not be required. The monument will be furnished and set by the Engineer.
8-13.3(2) Adjust Monument Case and Cover
8-13.3(2)A Removing and Lowering Monument Case and Cover
The existing monument cases and covers shall be lowered prior to planing and adjusted to the finished grade after the HMA overlay is complete. The Contractor shall reference the location of each monument case to be adjusted. The Contractor may use location devices, offsets, or any locating method approved by the Engineer. Monument cases and covers shall be lowered sufficiently to allow the planer to maintain a continuous profile and grade. Whenever lowered or removed, existing cases and covers shall be thoroughly cleaned for re-installation at the new elevation. The Contractor shall exercise care in removing the existing monument cases and covers so as not to disturb the monument or damage the case. The Contractor shall backfill and compact all voids resulting from lowering and adjusting the monument cases and covers. Backfill material shall be Crushed Surfacing Base Course (CSBC). The basis for acceptance of CSBC shall be visual inspection by the Engineer’s representative. The use of monument case riser rings will not be permitted. Debris from lowering and adjusting the monument cases and covers shall be removed from the project. Page 8-76 M 41-10
8-13 Monument Cases8-13.3(2)B Reinstalling Monument Case and Cover
The adjusted or reinstalled monument case and cover shall be reset to 1/4-inch above the finished pavement as indicated in the plans and in accordance with the following additional requirements:
1.The HMA shall be cut and removed to a neat circle, the diameter of which shall be equal to the outside diameter of the monument case plus 2-feet. The base materials shall be removed, the monument case set, and Commercial Concrete Class 3000 placed in the void between the case and the HMA, up to the finished pavement surface.
2.Prior to opening to traffic, the concrete shall have attained a minimum compressive strength of 2000 psi determined by WSDOT FOP for C 805. The concrete shall be cured by one of the following methods:
1.Covered with wet burlap for 24 hours.
2.Covered with white polyethylene sheeting for 24 hours.
3.Sprayed with liquid curing compound.
8-13.4 Measurement
Measurement of monument case and cover will be by the unit for each monument case and cover furnished and set. Measurement for adjust monument case and cover will be by the unit for each monument case and cover adjusted.
8-13.5 Payment
Payment will be made for the following Bid item when included in the Proposal: “Monument Case and Cover”, per each. “Adjust Monument Case and Cover”, per each.
Source: Washington Standard Specifications for Road, Bridge, and Municipal Construction, 2024 Edition. Pages 825–826 of 1,151.