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SR-128 Pavement Settlement and Drainage Repair DO (EA 04-0V830)

Active

State & Local

Contract Overview

Solicitation details, issuing organization, response deadlines, documents, and interested companies for this government contract opportunity.

AI Contract Overview

The California Department of Transportation Caltrans District 4 is proposing a project to repair pavement settlement and drainage failures on State Route 128 in Sonoma County, specifically at post miles 16.07 and 16.16 south of Maacama Creek Bridge near Calistoga. At post mile 16.07, the scope includes replacing westbound and eastbound drainage inlets with GT4 and G2 models and installing a 24-inch corrugated steel pipe culvert with a TEE dissipator. To prevent further slipout, a soldier pile wall with concrete lagging, approximately 80 feet long and up to 10 feet high, will be constructed. This section also requires the reconstruction of the embankment, installation of permanent erosion control, and the excavation and repaving of the roadway including new striping and pavement delineation. At post mile 16.16, repairs focus on stabilizing an undermined section using cement slurry backfill and the removal of loose debris. The slope will be excavated one foot below failure plane boundaries and reinforced with Class 8 RSP fabric per Standard Specification Section 72-2.02C, followed by Class VI 3/8-ton RSP Type A placement. Technical requirements specify a 3-point bearing for rocks and a 4-inch shotcrete layer applied one inch at a time. The project is classified as exempt under PRC 21084 and 14 CCR 15301 Class 1, with no anticipated environmental impacts. The primary point of contact is Juliane Smith, Senior Environmental Scientist.

General Info

Repair pavement and drainage on SR-128 near Calistoga with culvert, soldier pile wall, slope stabilization, and shotcrete.

Agency

California → Caltrans, District 4 - Bay Area/Oakland

NAICS

237310 - Highway, Street, and Bridge ConstructionView NAICS

Place of Performance

Set-Aside

NONE

Documents

(1)

Caltrans SR-128 Pavement Settlement and Drainage Repair Notice of Exemption

PDF•notice-of-exemption

AI Contract Breakdown

Uniform Contract Format

Timeline

PostedJul 27

forecast

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Organization & Contact Information

AgencyCalifornia → Caltrans, District 4 - Bay Area/Oakland

Contacts1 person available

OfficeN/A

Organization / Agency

California → Caltrans, District 4 - Bay Area/Oakland

Office AddressN/A

Contacts

Juliane SmithSenior Environmental Scientist (NEPA/CEQA Specialist)

contact@example.gov

+1 (555) 000-0000

Full Description

The California Department of Transportation (Caltrans) proposes repairing pavement settlement and drainage failures at post mile (PM) 16.07 and 16.16 on State Route (SR-) 128 in Sonoma County, south of Maacama Creek Bridge near Calistoga. At PM 16.07 the drainage system will be repaired by replacing the westbound DI with a GT4 DI and the eastbound DI with a G2 DI. A short reach of 24-inch corrugated steel pipe (CSP) culvert with a TEE dissipator will be constructed to discharge runoff onto the existing rock slope protection (RSP) pad. The alignment of the drainage culverts will remain unchanged. Loose material, debris, and vegetation on the failed slope will be removed. A soldier pile wall with concrete lagging will be constructed to prevent further progression of the slipout. The proposed wall is estimated to be approximately 80 feet long and will retain a maximum height of 10 feet. The embankment will be reconstructed and permanent erosion control installed. The roadway and structure will be excavated and reconstructed. The roadway will be repaved and any striping/pavement delineation replaced. At PM 16.16 The existing undermined section below the concrete pad will be repaired using cement slurry to backfill the cavity. Loose debris within the washout area will be removed and the slope will be excavated an additional one foot below the failure plane boundaries. RSP fabric Class 8 will be placed over the excavated areas in conformance with Standard Specification Section 72-2.02C. Class VI 3/8-ton RSP (Type A Placement) will then be placed over the RSP fabric. Rock voids will be filled with excavated material per District Landscape Architect recommendations. A 3-point bearing for rocks must be achieved. The top of the RSP will be filled with shotcrete for a 4-inch shotcrete layer. Shotcrete must be added one inch at a time.