QnA 5 27 2021.pdf

Questions and Answers during Advertisement for OK ERO SEQU T500(1), Horton Slough Trail

May 10, 2021

Questions Answers

1) Is there currently a site-visit scheduled or can we go on our own to inspect the project site?

There is no organized site visit. The site is accessible to interested bidders.

The refuge is open from 5am until 1 hour after sunset.

May 25, 2021

2) On drawing sheet C5, construction access shown for the south side of the slough does not show any access to the existing pedestrian bridge. Drawing sheet S9 calls for both the south abutment removal and the north abutment removal. Please clarify what access the contractor will have to the south abutment of the existing bridge for tools and machinery.

The contractor will have access to the south abutment from the existing paved Horton Slough Trail as described in 108.01 of the SCRs.

Approximate location is shown on Sheet C5.

3) Observation Decks #1 and #3:

The contract requires the removal of the foundation of for Deck #1, but the plans do not describe what this foundation is comprised

of. Can the government clarify what this deck’s foundation consists of and the extents of its removal?

Existing foundation for Deck #1 were not readily visible during CFL’s site visit. It is believed that much of the foundation has been displaced downstream. Removal of any remaining foundations will only be as needed to facilitate installation of the helical pile and riprap. We would entertain shifting the deck slightly to facilitate pile installation should any existing foundations be overly difficult to remove.

4) Observation Decks #1 and #3:

Drawing sheet S19 calls for removing the 6 concrete caissons for Deck #3. Can the government clarify the extent for removal of the Caissons? Are these caissons to be completely removed or will demolition of the tops to below grade sufficient for new foundations be adequate?

Per SCR 203.04, “remove existing bridge substructure, concrete approach slab, and existing riprap as necessary to install helical pile or as directed by the CO.” If there is no conflict with helical pile installation, per Section 203.04.b, remove caissons “to the natural stream bottom.” We would entertain shifting the deck slightly to facilitate pile installation should any existing foundations be overly difficult to remove below the natural stream bottom.

5) Observation Deck #1 For the composite deck:

a) Are the decking boards to be tongue and grooved for no gap between boards or standard edge?

b) If standard Edge, what is the acceptable gap space?

a) Either standard edge or tongue and grooved is acceptable provided the outside edges have a standard edge (not tongue or groove).

b) Provide the minimum gap space recommended by the composite deck manufacturer.

6) Traffic Control:

Drawing Sheet T3 calls for traffic control signs to be placed on wood posts. The majority of the traffic control will be for the parking lot improvements but the duration of this work should not be long enough to justify the necessity for post and sign installation. Would the government allow for temporary traffic control signage to be placed on tripod type equipment that would allow for quick install and removal?

Per SCR 635.07 - Portable sign supports may be used instead of sign posts when approved by the CO.

Observation Decks and Riprap (Q&A 8 – 11)

7) Please confirm that Class 7 riprap is to be used for Observation Deck #1 and #3, as well as at the location of what was once observation deck #4. Class 7 riprap is not product that is readily available.

25101-0700 Placed Riprap, Method A, Class 7 has been revised to 25101-0500 Placed Riprap, Method A, Class 5.

8) The trucking and machinery that will be necessary to haul and place this material in the proposed locations will cause severe damage to the surrounding area and pavements. The project documents do not currently allow for construction access to these areas. Please clarify what contingencies the contractor will need to have in place for this.

Construction access will be provided as approved by the CO.

Contractor will be required to restore any areas damaged during construction. Bidders are encouraged to visit the sites to assess construction staging and access.

9) The helical piles for the observation decks will need to be installed prior to placement of the proposed riprap. Placing class 7 riprap after the installation of the these piles will damage/destroy the pile stems and prevent proper alignment of the observation deck structures.

Protection of helical piles during riprap placement shall be responsibility of the contractor. Contractor should provide means and methods to protect the piles during riprap installation.

10) Please clarify the purpose of the geotextile to be placed under the proposed class 7 riprap. Placement of this size of material will damage the fabric and render it useless.

Geotextile below riprap is required to separate it from the on-site soils, to prevent migration of fine materials into the riprap, and, essentially, to keep the riprap from sinking into the on-site soils. The comment is correct that damage could occur to the fabric during riprap installation.

The contractor should limit the height from which riprap is dropped to reduce the potential for damage.

May 27, 2021

1) Current projected lead time for the fabrication and delivery of the bridges and observation deck is approximately 2 months from the time of submittal approval. Please confirm that contract time will be extended and no liquidated damages will incur for going beyond the construction delivery date of December 17th for reasons outside of contractors control.

The fabrication and delivery was taken into consideration. See Section

108.01 for contract completion date.