Goat_Canyon_Response_to_Questions_4-13-2016.pdf

Goat Canyon Sediment Clean Out and Removal of Deposition Material - C1547026

California State Parks- Formal Responses to Bidder Questions

Q1) When this was done in the past, did the contractor use a barge with dredge or were divers used. Im assuming the catch basin are always full of water.

(Submitted 4/5/16 by Steven Ackart, Tidal Marine Construction Inc.)

Response:

The upper basin surface is typically dry when the contract begins, although subsurface material typically retains moisture. The lower basin retains more water and may not dry significantly. If water is present and this precludes excavation of the required volume, it is the Contractor’s responsibility to pump the water in order to facilitate excavation. In the past, we have de-watered the basin with a 3” trash pump discharged to a vegetated area downstream. We estimate 20,000 yards of material to be in the upper basin alone however this is just an estimate based on casual observation and it is the Contractor’s responsibility to verify all volumes. . The excavation portion of this project is required to be completed by the end of October, to avoid weather-related impacts. In the past, contractors used front loaders or other heavy equipment to excavate the basins. No barges or divers have been used.

Q2) Is the mandatory pre-bid site visit going to happen rain or shine? If not at what time will you call it off?

(Submitted 4/5/16 by Justin Welham, United Storm Water)

Some rain is forecasted for Friday but the pre-bid meeting will be held rain or shine.

Q3) Do the pre-excavation and post-excavation surveys need to be performed by a third party registered surveyor?

Surveys shall be performed by a third party registered engineering surveyor. Survey files shall be submitted electronically to the CSP Representative in PDF and AutoCAD file formats.

Q4) What is the per 100 cubic foot cost of water to be charged the contractor?

Water rates vary depending on usage. Average cost per hundred cubic feet (HCF) in 2015 was

$19.51 (range: $12.70 to $22.30).

Q5) What is the surveyed cubic yardage of the pile of soil on the processing pad?

Approximately 74,000 cubic yards is present on the processing pad. The stockpile was surveyed in 2014.

(#3-5 Submitted 4/8/16 by Joe Ellis, Marathon Construction Corp.)

Q6) Can we review the analytical that was performed? That way I can provide rates for non-haz and/or cal-haz/non-RCRA to the bidders – if indeed it is in that category. I imagine that it might be clean material and just MSW for disposal.

Response:

The 2014 sediment analysis from the USEPA will be uploaded to Fi$cal. Previous years’ analyses should be used as guidelines only, as the material may vary year to year. This year’s material in the basins has not been tested. It is the responsibility of the Contractor to test this year’s material if that information is needed for disposal.

(Submitted 4/8/16 by Stacy Loveland, Republic Services)

Q5) Does the facility have a concrete bottom across both basins?

Response:

No, the basins are earth bottom however excavation shall not be deeper than design grade. The spill way on the upstream end of the upper basin has a concrete bottom and sides, the road through the middle of the basins has a concrete bottom, and the outflow structure has a concrete bottom. All concrete must be protected from damage by heavy equipment (e.g., metal tracks shall not be used on concrete).

Q6) If it is found that less than 20,000 yards of sediment is present in the basins, should we plan on a second mobilization after rains bring sufficient sediment to capture 20,000 yards?

It is the preference of the State that all excavation is completed immediately, and before significant rainfall. After significant rainfall, it is extremely difficult to work in the sediment basins and therefore we prefer that all excavation is complete prior to significant rainfall. 20,000 yards is an estimate of what we expect to find in the basins at the start of the project. If it is found that less than 20,000 yards of material is in the basins, then the savings realized from excavating less than 20,000 yards shall be applied to the export of material, and the unit rates for excavation and export will be used accordingly. If it is found that more 20,000 yards is in the basin, the Contractor shall only excavate 20,000 yards.

Q7) What type of equipment is typically used for excavation?

In the past, the basins have been excavated with large scrapers, and also excavator and haul truck. Basin infrastructure must be protected- some vulnerable infrastructure includes: Concrete bottom of spillway, middle road, and outflow; metal bollards on concrete spillway; story poles indicating sediment depth are located within the basins.

Q8) Is there enough room to stockpile 20,000 yards on the processing pad?

Yes. Last year 20,000 yards was placed on the processing pad, screened, and hauled off site.

Expect limited working space.

(#5-8 Submitted 4/11/2016 by Luis Rios, Mark Wunch GC)

Q9) Is the project significantly different from last year’s project?

Response:

No. The project varies from last year’s project primarily in the break-down of bid options for export. Some of the Details in the Scope of Work have been slightly altered from previous years to clarify intent of project.

(#9 Submitted 4/12/2016 by Luis Rios, Mark Wunch GC)