Div01 Section 01 11 00 spec.pdf

SECTION 01 11 00

SUMMARY OF WORK

08/15

PART 1 GENERAL

1.1 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Utility Outage Requests

Utility Connection Requests

Borrow Permits

Excavation Permits

Welding Permits

Burning Permits

Salvage Plan; G

1.2 WORK COVERED BY CONTRACT DOCUMENTS

1.2.1 Project Description

This project is for levee construction along the South San Francisco Bay Shoreline, consisting of ~1.7 miles of flood risk management levees. The project area is between New Chicago Marsh and the Alviso pond complex -former salt harvesting ponds. Reach 1 is bounded by Alviso Marina Park and the crossing of Union Pacific Rail Road (UPRR); and Reaches 2 and 3 are bounded by UPPR and Artesian Slough. The engineered levees have a crest elevation of ranging from 15 to 17 feet, a minimum crest width of 16 feet, and 3H:1V side slopes. The access road, on top of the levee, will be surfaced with a minimum of 8 inches of Cal Trans Class 2 Aggregate Base.

Structural features included in the contract include two water control structures and pedestrian boardwalks. The water control structure in Reach 1 is to be relocated and replaced in kind; the control structure in Reach 2 will be replaced with a 16 feet tall reinforced concrete structure, with flared wingwalls that match the levee slope. This structure includes a 48 inch reinforced concrete pipe (RCP) that runs from the Pond A18, through the levee, and discharges into the marsh. The boardwalk is to be replace-in-kind, with access from the marsh to the top of the levee. The bay mud limits the levee construction rate for Reach 1, to allow construction pore pressures to dissipate. Construction for Reach 1 is likely to be performed across the duration of the period of performance to allow consolidation of the bay mud. The location and description: Reach 1

~4,200 feet of levee, Reach 2-3 ~4,600 feet of levee.

The existing material to be excavated is not suitable to be used for the engineered levee; all fill will have to be imported from a borrow site.

Approximately 106,000 loose cubic yards of levee fill is provided by the government in a stockpile in Pond A12 adjacent to Reach 1. However, some of this volume will be unusable for levee fill due to subsidence, and the top layer will not be usable due to vegetation root infiltration. Please see the Attachment 1.c - Shoreline Levee Fill -Fill Reports.zip for more details. Additional levee fill will need to be secured and delivered to the site by the Contractor. Levee fill will need to meet both geotechnical and environmental contaminant specifications.

The site has limited access. Ingress/egress is anticipated to be from Hope Street and Grand Boulevard. Material from excavation will be stockpiled in Pond A12. The designated stockpile area has limits 500 feet from the centerline for Reach 1, and an average one-way haul distance of 2 miles for Reach 2/3 when considering haul distances before and after the grade crossing is constructed.

1.2.2 Location

The work location is started from the Alviso Marina. The work area, staging area, haul route, and borrow area are shown on the project drawings. The Site may be accessed from Hope Street, and Grand Blvd. and Los Esteros Rd.in Alviso, California. The exact locations will be shown by the Contracting Officer.

1.3 EXISTING WORK

In addition to FAR 52.236-9 Protection of Existing Vegetation, Structures, Equipment, Utilities, and Improvements:

a. Remove or alter existing work in such a manner as to prevent injury or damage to any portions of the existing work which remain.

b. Repair or replace portions of existing work which have been altered during construction operations to match existing or adjoining work, as approved by the Contracting Officer. At the completion of operations, existing work must be in a condition equal to or better than that which existed before new work started.

c. The Contractor shall reconstruct, repair, restore, or replace any park amenities, bird islands, or recreational amenities that are destroyed, altered, damaged, disposed of, or demolished by Contractor during construction, including but not limited to the observation platform, trails, paths, roads, picnic table, picnic areas, signs, or any other structure or infrastructures adjacent to or in the Temporary Work Area Easement(TWAE) area or that the contractor use during the construction.

1.4 LOCATION OF UNDERGROUND UTILITIES

Obtain digging permits prior to start of excavation, and comply with local government requirements for locating and marking underground utilities.

Contact local utility locating service a minimum of 48 hours prior to excavating, to mark utilities, and within sufficient time required if work occurs on a Monday or after a Holiday. Verify existing utility locations indicated on contract drawings, within area of work.

1.4.1 Notification Prior to Excavation

Notify the Contracting Officer at least 5 days prior to starting excavation work.

1.5 STAGING AREAS

Staging Area #1 (APN 015-03-019) shall be used for a 36' by 60' governmental trailer with other necessary items and recommended for the contractor's trailer(s) Plan Sheet G-007 of Reach 1. Refer Section 01 14 00, Section 01 50 00 and Section 01 50 01 for limitations and expectations.

Staging Area #2 has a 2 foot cap of clean soil placed on top of the approximate 10 feet of remediated soil, such that no additional testing or PPE would be necessary for work on these areas. Refer Section 01 14 00 and Section 01 50 00 for limitations, preparation and construction details.

Staging Area #3 is the Grand Boulevard Site, 675 Los Esteros Road (Plan Sheet V-29 in Reach 2-3) is located within a corrective action area. Refer Section 01 14 00 and Section 01 50 00 for work restrictions, limitations, and expectations in these areas.

At the end of construction, these areas shall be restored to its preconstruction conditions.

1.6 Haul Roads and access roads

The existing haul roads and access roads shall be restored to its preconstruction conditions at the end of construction.If the haul roads and access roads are built during the construction, they shall removed and restored to their preconstruction conditions or better conditions at the end of construction as mentioned in Section 1.3 above.

Haul trucks entering the construction site from the Alviso Marina County Park access point shall access the site via State Route 237 to the Lafayette Street/Great America Parkway, the Gold Street Connector to Gold Street, to Elizabeth Street, to Hope Street. Haul trucks entering the construction site from the USFWS Refuge Visitor Center access point shall access the site via State Route 237 to Zanker Road/Los Esteros Road to Grand Blvd. Trucks can exit from either the same or different access point from which they entered, following the entrance route described in reverse.

Contractor shall be responsible for obtaining haul permits from local government.

l3eteek9 Highlight

PART 2 PRODUCTS

Not used.

PART 3 EXECUTION

Not used.

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