Question And Answers-1

Questions and Answers Solicitation: W912HN-10-R-0027 RECOVERY--Z--Project Number 11148201, Bank Stabilization Rediversion Canal Highway 35, St. Stephen Powerhouse, St. Stephen, Berkeley County, South Carolina

Question: 1) What temporary or permanent pollution control structures are required?

Answer: Contractor is required to provide plan for all pollution control structures as described in 01 57 20 and 01 57 23. Please clarify any specific questions.

Question: 2) What electrical power is required? What if we do not intend on having a ' job trailer' or is one required?

Answer: No electrical power is required except that which is needed by the contractor for their trailer.

Question: 3) What design/engineering service or scope is required?

Answer: Contractor must provide all services required for submittals and requirements of the specifications for construction and environmental protection. Please clarify any specific questions.

Question: 4) Are there pesticides required, so much is mentioned on pesticides in the bid documents?

Answer: No..

Question: 5) What landscaping is required to protect?

Answer: All landscape onsite must be protected or restored.

Question: 6) What 0 & M manuals and repair spare parts and shop drawings are being required?

Answer: None. Specifications are being revised to delete this.

Question: 7) Do you have a sample of a Warranty Management Plan?

Answer: Not applicable, specification is being revised to delete this.

Question: 8) How does the government propose to place and secure the - 35' length of geotextile 15' below water level @ elev. 60.00 or will the plant be shutdown during this operation?

Answer: Contractor provides the construction methodology for all aspects of the project. Powerhouse will not be shut down for construction.

Question: 9) Is there any roofing, HVAC indicated in the solicitation documents in this scope of work?

Answer: No, specifications are being revised to delete this.

Question: 10) Will the actual (onsite) geotextile fabric or silt fencing required to be tested for tensile strength or any other field test by an independent lab outside what the manufacturer already performs?

Answer: No, only the required manufacturer certification required

Question: 11) Will the 2009-10 canal survey be made available indicating a severe scour hole adjacent to the bridge piling? Is there any work to be performed at this scour hole?

Answer: Those are not design issues no pertinent to construction contract please only bid only what is shown on the drawings.

Question: 12) Were 'wave' action characteristics during draw down or water hammer effects considered?

Answer: Design issue. This should not affect construction methodology, Bid what is shown on the drawings.

Question: 13) Is the specified rip rap gradation a unique custom sizing or will the Corps provide for standard SCDOT Class B or C by established and SCDOT approved methods?

Answer: Contractor is required to meet the gradation in the specification.

Question: 14) Are certified weigh scales required at the jobsite?

Answer: NO.

Question: 15) Are there special certification requirements of the contractor's key personnel?

Answer: Personnel requirements are in the Specifications. SECTION 01 45 00.00 10

QUALITY CONTROL.

Question: 16) Will the government post the attendees of the site visit in a modification/addendum?

Answer: Yes, they have been posted at www.fbo.gov.

Question: 17) What compaction testing will be required at cut excavations on sloped keyed areas?

Answer: None

Question: 18.) Please clarify rip rap Table 1 in section 35 31 19, page 7. Is 100% lighter than 117lb or 292lbs? And the same for 50% and 15% ranges, etc.

Answer: According to standard USACE practice, the specification provides for two limiting gradation curves (maximum and minimum) and any stone gradation that lies within these limits is acceptable.

Question: 19.) What will be the requirements for the CLIN 0001AB “Bank Preparation”? It appears that more erosion may have occurred from the time that the cross sections were surveyed and now. Will the contractor be expected to fill in any “holes” or washed out places with sand or earth material as described in the specs, or will these area be filled with rip rap material at the unit price. We are unsure as to how the bank can be graded with earth material or sand below the water level.

Answer: There is no backfill with sand or earth below the water level. Area will be filled with stone. Specification 35 31 19 section 3.1 will be revised.

Question: 20.) I need to know what size paper the engineer drew up the plans on so I can get the Plans done to scale.

Answer: 24” x 36”

Question: 21.) On the bid form item number 0001 Base Item-HWY 35 North FOB: Destination and item number 0002 Option-HWY 35 South FOB: Destination. What do these two bid items intended for, there is no unit of measure. Could you please clarify what is be included under these two items.

Answer: CLIN 0001 and CLIN 0002 are informational CLINS only. There is no requirement for anything to be “included” under these two individual items.

Question: 22.) Do the slopes have to be graded to a 2:1 down to the bottom elevation of the rip rap before the rip rap is placed. Or can the rip rap be put in place on the existing ground to form the 2:1 slope. Could you please clarify.

Answer: Please clarify more specifically your question.

Question: 23.) The detail on the drawings show the filter fabric going to elevation 60, which is in 14 feet of water. The specs also indicate that the fabric has to be sewn together. Could you please clarify what is acceptable to the core because the only way to put the fabric in per the drawings and specs would be to sew it together on top of the hill, key the top in, and have a diver on-site to pull the fabric down to elevation 60 and tack it in place.

Answer: Construction Methodology is up to the Contractor.

Question: 24.) The stated duration of the contract is 120 days. Is this for the base bid only?

Answer: 120 is the entire duration of the contract for base bid and option if exercised.

Question: 25.) Access to the North side (Base bid) is to the West side of the bridge. How will contractor get equipment to the East side that is too big to go under the bridge?

Answer: From Highway 45 access to the patrol road and the along the patrol road.

Question: 26.) If the option for the South side work is accepted, where is the access point for the East and West sides? (there is no access to the work site on this end of the bridge)?

Answer: East side : From Highway 45 access to the patrol road and the along the patrol road. West side: via Russellville boat landing under Railroad bridge.

Question: 27.) If the option for the South side work is accepted, would workers be allowed to park their vehicles along the shoulder of Highway 35 and walk to the work site? If not will Company vehicles be allowed to use the service road to transport them?

Answer: No . Access from Highway 45 and patrol road.

Question: 28.) What is the existing canal waterline elevation?

Answer: Varies based on lake level. See http://waterdata.usgs.gov/sc/nwis/uv/?site_no=02172000&PARAmeter_cd=00065,00060,00062 for lake levels.

Question: 29.) Is the existing riprap to be reused or wasted in stockpiles at Powerhouse?

Answer: As indicated on Plans, existing riprap is to stockpiled near the fish hatchery near the powerhouse.

Question: 30.) Is all excess excavation to be wasted at the stockpile location at Powerhouse?

Answer: As indicated on Plans, excess excavtion is to stockpiled near the fish hatchery near the powerhouse.

Question: 31.) Is depth of riprap below 5.5’ wide keyin area variable based on existing bank elevation and proposed 2:1 slope of new riprap?

Answer: Elevation of the toe varies. Please see provided cross sections.

Question: 32.) The plans do not show the access points to the project area. How is the site to be accessed?

Answer: Please see question and answers #25, 26, and 27.

Question: 33.) The plans do not show the location of the fish hatchery where the existing riprap and excess soil is to be stockpiled. Is an overview map showing the location, size of stockpile area and acceptable haul route to the fish hatchery available? If no map is available, can a detailed written description be provided?

Answer: THE CONTRACTOR SHALL STOCKPILE THE EXISTING RIPRAP AND EXCESS SOIL REMOVED FROM THE 2:1 CUT SLOPE AT A SITE ADJACENT TO THE FISH HATCHERY (APPROXIMATELY 700 FT NORTH OF THE POWERHOUSE) AS DIRECTED BY THE CONTRACTING OFFICER. THE POWERHOUSE IS APPROXIMATELY 2.7 MILES DOWNSTREAM OF THE PROJECT SITE. THE CONTRACTOR SHALL SUBMIT A HAUL ROUTE FOR APPROVAL BY THE CONTRACTING OFFICER. THE CONTRACTOR SHALL INSTALL SILT FENCE AT THIS STOCKPILE AS DIRECTED BY THE CONTRACTING OFFICER.

Question: 34.) Is it anticipated that the entire area shown for new riprap installation currently has existing riprap on it that needs to be removed? What is the depth of the existing riprap? Is filter fabric underneath the existing riprap to be removed?

Answer: THE EXISTING RIPRAP IS INTERMITTENT. THE DEPTH IS UNKNOWN, BUT NO EXCAVATION WILL TAKE PLACE BELOW ELEVATION 60.0

ANY EXISTING FILTER FABRIC ENCOUNTERED WHILE EXCAVATING THE 2:1 SLOPE SHALL BE REMOVED.

Question: 35.) At what elevation is the water level typically in the rediversion canal?

Answer: Please see question and answer #28.

Question: 36.) Will any erosion control measures be required in the rediversion canal, such as a turbidity curtain?

Answer: NO