AG-0489-S-10-0428_amend3.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

1. CONTRACT ID CODE PAGE OF PAGES

1 3

2. AMENDMENT/MODIFICATION NO. 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQ. NO. 5. PROJECT NO. (If applicable)

Three (3) June 3, 2010

6. ISSUED BY CODE 7. ADMINISTERED BY (If other than Item 6) CODE

US Forest Service EROC Northwest 16400 Champion Way Sandy, OR 97055

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State, and ZIP Code) (X) 9A. AMENDMENT OF SOLICITATION NO.

AG-0489-S-10-0428 RECOVERY

Whistle Stop Placer River Trail Bridge & Access

9B. DATED (SEE ITEM 11)

04/29/2010

10A. MODIFICATION OF CONTRACT/ORDER NO.

10B. DATED (SEE ITEM 13)

CODE FACILITY CODE

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

The above numbered solicitation is amended as set forth in item 14. The hour and date specified for receipt of Offers is extended, is not extended.

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods:

(a) By completing Items 8 and 15, and returning or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS,

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

(X) A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN

THE CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return 1 copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.

Amendment Three – Provides clarification on questions / answers regarding the project.

The solicitation close remains June 11, 2010 at 2:00 pm

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

PT.

15A. NAME AND TITLE OF SIGNER (Type or print) 16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

TONYA RYMER

15B. CONTRACTOR/OFFEROR 15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 16C. DATE SIGNED

6/03/2010 (Signature of person authorized to sign) (Signature of Contracting Officer)

NSN 7540-01-152-8070

Previous edition unusable

30-105 STANDARD FORM 30 (REV. 10-83)

Prescribed by GSA

FAR (48 CFR) 53.243

Question 1

Answer: You are correct. We do not need project cost estimates at the design review stages. We would like to know of any anticipated increases or decreases in contract costs at the earliest opportunity, however. For example, market fluctuations in the price of steel.

: The 35%, 95%, and Final Design (C.5. G-I) steps each include line items for updated cost estimates but this project is issued as a Fixed Price offer. We are not sure how to reconcile these things.

Question 2

Answer: Continuous includes timber decking laid perpendicular to the travel way. Tread to meet FSTAG requirements for Trail Class 4 (Tread and Traffic Flow attribute)

: Decking is specified “shall be continuous” (C.2.A.13), but it is also tentatively specified as timber (C.2.A.15). Can you provide guidance about “shall be continuous” – it could be construed to rule out timber decking laid perpendicular to the travel-way, which is common decking practice.

Question 3

Answer: Survey data, in ASCII, Autocad Civil 3D, and/or other available formats will be made available after contract award.

: Section C.3/A indicates that the Government has completed a site survey; can any site survey data be made available beyond what is included in the solicitation?

Question 4

Answer: Length will be determined by contractor design. Estimate based on height of bridge and required grade.

: Can you specify the length of the 6’ approach trail work (or any other details) included as an Option?

Question 5

Answer: June through September, although June and late September may be too snowy in a given year.

Construction in 2011 is acceptable.

: Can you specify a reasonable building season in that location?

Question 6

Answer: No.

: Bids. Can bids be sent via email in .pdf format?

Question 7

Answer: A reasonable engineering approach with logical assumptions calculated by a bridge design engineer experienced in this type of bridge design will be considered. Consider 30 psf weight for wet snow and the fact that wet snow can freeze and thus will not blow away easily. It is logical to assume snow depth will not greatly exceed railing height, although we have seen instances when wet snow froze, and was higher than the rail height and did not dislodge easily.

: Can we use a 4’ standing height of snow for calculating wind loads on this bridge structure? The solicitation specifies 200 psf snow load on the bridge deck, which would translate into depths of 12’-20’, but 1/we believe this is excessive, given that snow will not accumulate on the deck to sufficient depth to create even the AASHTO-pedestrian load of 90 psf without calving off the side of the deck and 2/in a high-wind event, it is not plausible that a wall of snow would remain standing above 4’ height.

Question 8

Answer: Yes, the FS anticipates earthen approach ramps and we anticipate them to be lengthy due to the accessibility requirement and height of the bridge. Gentle curves and design features to blend in as much as possible with the natural surroundings are desirable. The bridge location was chosen where the banks are highest in the area to get these approach ramps out of the active flood plain. Annual flooding is not anticipated. The contract requires a Hydraulic and Scour Analysis which we anticipate will include information for design of the approach ramps.

: Does the Forest Service desire/allow earthen approach ramps? These would present several challenges (allowing passage of water during high flood periods, impact on the ground, horizontal force against the bridge abutments), and we can handle them all, but we’re not clear on this point.

Question 9

Answer: Yes, the FS will consider alternative designs for the approach spans. Design criteria is that the approach meet FSTAG Trail Class 4 requirements, and other criteria listed in Section C.1 Description of Work.

: Would the Forest Service consider approach spans to the bridge (this would mean a bridge with a 280’ span and (say) 70’ of approach spans? With suspension bridge mainline cables already in place, approach spans could be hung on either shore, eliminating the need for earthen ramps.

Question 10

Answer: Yes. Bridge centerline may be adjusted to best fit the design in the natural topography. Side channels, strait stable stream reach, and unstable banks upstream and downstream helped determine the location of the bridge indicated on the drawings, so adjustments are anticipated to be minor.

: Do we have leeway to incorporate the hills noted above into our design with an adjusted bridge centerline?

Question 11

Answer: The 25 ft requirement is to allow ice bergs from the glacier to float under the bridge without damaging the superstructure. This height was selected to match the railroad bridge, which has been in place for many years. The 25 ft requirement may be lessened at the ends of the bridge, but not for a large percentage of the crossing length. The contractor’s Hydraulic and Scour Analysis may provide information supporting more or less clearance at the ends of the bridge.

: Does the bridge need to maintain 25’ clearance above the river for the entire span?

Question 12

Answer: Most likely not.

: We would like to know if the Forest Service would consider letting us put a trail from the Seward Highway up the east side of Placer River to connect with the roads that go to the gravel pit and to the proposed bridge site.

Question 13

Answer: Don Worthley is the Forest contact at the Alaska Railroad. My understanding, however, is that only ARR vehicles can be on the tracks.

: We have had some difficulty trying to get to the right individual at the Alaska Railroad to see if they will allow us to run rail gear on our equipment from the Seward Highway railroad siding to the Whistle Stop on both the East and West side of the river.

Question 14

Answer: If proper construction of the bridge can be accomplished in the winter months, and mobilization methods do not damage the land, this is a viable alternative.

: if the railroad, because of all it’s normal activities, would not be timely for the construction of the bridge, we would like to consider mobilization and demobilization of the bridge site on both east and west side to be done on the river in winter months.

Alaska Rail Information

For a lump sum charge of $10,000, ARRC will provide the successful Placer River Bridge Contractor rail transportation for up to ten (10) persons per day to and from the project site at Spencer Glacier for the duration of the ARRC passenger season that ends September 12th. This service will apply only to contractor employees and sub-contractor employees performing construction services at the project site.

All persons intending to travel under must be manifested a minimum of 3 days prior to the intended travel date.

Three trains will stop daily:

Traveling To the Project Site:

Glacier Discovery: Arrives Spencer daily at 1:45 PM (13:45)

Leaving the Project Site:

Glacier Discovery: Departs Spencer daily at 4:40 PM (16:40) Coastal Classic: Departs Spencer daily at approx. 8:00 PM (20:00)