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CA PFH 112-1(3) South Fork Smith River Road - George E Tyron Bridge Replacement

Solicitation Number: DTFH68-13-R-00010
Agency: Department of Transportation
Office: Federal Highway Administration (FHWA)
Location: Central Federal Lands Highway Division
  • Print
:
DTFH68-13-R-00010
:
Award
:
September 12, 2013
:
DTFH68-13-C-00029
:
$34,700
:
Flatiron West Inc
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Added: Jul 01, 2013 5:39 pm
This project is for the replacement of the George E. Tryon Bridge located in Del Norte County, along County Road 427 (Forest Highway 112 (FH 112)), also known as South Fork Smith River Road in northwestern California. County Road 427 begins at the intersection with US-199 near Hiouchi, California. The George E. Tryon Bridge is located at milepost 0.4 at the crossing of the South Fork of the Smith River. The bridge is also locally known as the Second Bridge and has the Caltrans Bridge Designation of 01C0005.

The selected construction manager (CM) will act as a construction advisor during the pre-construction phase and as the general contractor (GC) during construction. It is anticipated that the successful proposal will be awarded with a contract for the pre-construction services around mid-September.

The selected CM will perform design milestone and constructability reviews, cost estimates, construction phasing and schedules, budget recommendations, coordinate designs with the Engineer(s), assist in coordination with 3rd parties (utilities, permitting agencies, adjacent municipalities, etc.), submit alternative technical concepts, prepare early bid packages, assist in determining the best options for the owner based on the project budget, develop and maintain a sense of urgency for the Project, and develop an overall project schedule (encompassing the individual schedules for design, permitting, utilities, right-of-way, etc.). Upon completion of design, FHWA can exercise the contract option and award the construction portion of the contract based on a fair and reasonable negotiated price.


The overall project length is approximately 0.2 miles and includes the bridge, a 500 foot long approach on the north end of the bridge and a 200 foot long approach on the south end of the bridge. Additional approach road construction of 200 feet is estimated for Douglas Park Drive. Traffic must be maintained on the routes throughout construction. The existing bridge will be removed as part of the project.


The existing historic 206-foot long, two-lane, steel, spandrel deck arch bridge was constructed in 1948 and spans the South Fork of the Smith River. The main arch span is 140-foot long. Due to the historic nature of this bridge, the County would like the replacement structure to share geometric similarities with the existing bridge. A concrete arch bridge located on the existing alignment has been selected as the preferred alternative.


It is estimated that the deck of the arch bridge would be approximately 226-feet long and 36-feet 4-inches wide, founded on existing rock. The bridge consists of a 140-foot main concrete arch span with dual ribs and one 38-foot approach span on each end of the arch. Girder spans on the arch are anticipated to be 30 feet long. Retaining walls would be required on both ends of the bridge. The temporary structure needed to maintain one traffic lane throughout construction is estimated at 305-feet long and 16-feet wide founded on temporary spread footings.


Existing roadway alignments at both approaches limit options for both the permanent replacement structure and the temporary structure. Staging areas at the bridge site are limited and access from below the bridge is difficult as the bridge is located on very steep rocky, river banks of a 60-foot deep environmentally sensitive gorge. The South Fork of the Smith River is a designated Wild and Scenic River, which may result in certain restrictions to construction access. Land adjacent to the bridge site is a combination of California State Parks, US Forest Service, and private.


Construction of any substructure elements within the river banks is difficult and will likely require the use of specialized excavating equipment, along with drilling and blasting to facilitate rock excavation and removal. Rock anchors will be required to stabilize the rock mass within the skewbacks beneath the foundation for the arch bridge.


The existing bridge that will be demolished and disposed by the construction contractor has coated steel-superstructure elements that most likely contain lead paint. All applicable safety regulations will need to be met during the demolition process and disposal of elements containing lead paint.


This bridge is located in an extremely sensitive cultural and natural setting. A partial list of threatened and endangered species includes Northern Spotted Owl, Marbled Murrelet, and Coho Salmon. There are potentially historic features and environmentally sensitive areas on adjacent land at both bridge approaches that must also be considered during the construction. The presence of these environmental resources may result in limited operating periods, noise limitations, and other applicable mitigation measures.


ENGINEER'S ESTIMATE:
Estimated Construction Cost Range is from $7M to $11M.


CONSTRUCTION SCHEDULE:
Construction is currently programmed for 2015.


MISCELLANEOUS:
This is an extremely complicated project that will require a very experienced bridge contractor due to the following issues:


• Unique and difficult arch bridge construction on near vertical river banks.
• Potential limitations on construction access from the river due to environmental constraints.
• Limited staging areas at both approaches.
• Extremely sensitive cultural and natural issues associated with this bridge site.
• Multiple agency coordination with the Federal Highway Administration, California State Parks, Del Norte County, and other federal resource agencies.
• Potential handling and disposing of lead paint contaminated bridge members.
• Maintaining traffic flow during construction in a constrained area.

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Solicitation 1

Type:
Solicitation
Posted Date:
July 16, 2013
Description: DTFH68-13-R-00010 South Fork Smith River Road

Appendix A Supporting Documentation

Type:
Other (Draft RFPs/RFIs, Responses to Questions, etc..)
Label:
Appendix A Supporting Documentation
Posted Date:
July 18, 2013
APPENDIX_A.pdf (64,716.81 Kb)
Description: Appendix A - Supporting Documentation

Appendix A - Continued

Type:
Other (Draft RFPs/RFIs, Responses to Questions, etc..)
Label:
Appendix A - Continued
Posted Date:
July 18, 2013
Description: Appendix A Continued

Pre-proposal Meeting Minutes/Sign In Sheet

Type:
Other (Draft RFPs/RFIs, Responses to Questions, etc..)
Label:
Pre-proposal Meeting Minutes/Sign In Sheet
Posted Date:
July 24, 2013
Description: CA PFH 112-1(3) Pre-proposal Meeting Notes_Sign In_7.23.13

Questions and Answers_8.1.13

Type:
Other (Draft RFPs/RFIs, Responses to Questions, etc..)
Label:
Questions and Answers_8.1.13
Posted Date:
August 1, 2013
Description: Questions and Answers_8.1.13

Questions and Answers

Type:
Other (Draft RFPs/RFIs, Responses to Questions, etc..)
Label:
Questions and Answers
Posted Date:
August 6, 2013
Description: Questions and Answers_8.6.13

Questions and Answers

Type:
Other (Draft RFPs/RFIs, Responses to Questions, etc..)
Label:
Questions and Answers
Posted Date:
August 6, 2013
Description: QUESTIONS AND ANSWERS_Additional Clarification for previous question_8.6.13
:
12300 West Dakota Avenue
Lakewood, Colorado 80228
:
Jason J Longshore
Phone: 7209633354