FY17_SanVicenteCreekBridge2_InspRpt.pdf

San Vicente Creek Bridge 2 Central Coast Field Office FAMS Location #: L2016060 Inspection Date: 10/3/2016

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IDENTIFICATION PHOTOGRAPH

Looking Back On Line

General Bridge Description:

San Vicente Creek Bridge 2 is located in the Coast Dairies area. To get to the bridge turn off of Highway 1 onto Davenport Ave. Then take a right onto Old Coast Road and the first left onto San Vicente Creek Road. Take the road east for 0.5 miles to the first locked gate. This represents the start of the BLM road. San Vicente Creek Bridge 1 is located 0.5 miles from the locked gate. After driving over San Vicente Creek Bridge 1, take a left where there is a second locked gate. San Vicente Creek Bridge 2 is located 0.7 miles past the second locked gate at mile post 1.3.

The creek flows from the north to the south. Abutment 1 is located on the east side (left side looking downstream) and Abutment 2 is located on the west side. The superstructure consists of a railcar superstructure with two exterior W16x40 steel girders. The railcar has four varying depth girders that go from a depth of 14-5/8” near the abutments to a depth of 20-3/8” at mid-span. The bridge has a deck consisting of transverse 4x12” timber planks with a tubular steel frame around the perimeter with one cross bracing member at mid-span. The timber deck is not directly attached to the superstructure. The overall deck width is 12’, but there are small timber curb members that limit the road width to 10’. The substructure consists of cast place concrete abutments with a concrete footing.

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STRUCTURE INVENTORY AND APPRAISAL SHEET

Sufficiency Rating:

*Note: The bridge is not reported to the NBI since it is closed. All fields do not need to be populated.

Note: Use the NBI Coding Guide for reference. Enter all measurement in English Units. When applicable, describe NBI code that is entered (e.g. 01-Slab, 1-Highway, 4-Poor, etc). Items 67, 68, and 69 are automatically calculated by FHWA and do not need to be populated.

IDENTIFICATION

1.State 069 – CA 8.Struc. # NA 2.Hwy District 00 7.Facility

Carried San Vicente Creek Rd

3.County Code

087-Santa Cruz

9.Location 1.8 mi N of Davenport, CA

6.Feature Intersected San Vicente Creek 5A.On/Under 1 – On 5B.Rte Sign. 6 – Federal 5C.Lvl. Serv. 1-mainline 5D.Rte. # 5E.Directional Suffix

1 98A.Border State Code

98B.Border % Responsible

99.Border Bridge #

4.Place Code 00000 11.Mile Post 1.3 mi.

16.Latitude 37.03442° 17.Longitude -122.17974°

STRUCTURE TYPE AND MATERIALS

46.# Approach Spans

0 45.# of Spans Main Unit

43A.Structure Material 3 – Steel 43B.Structure Type of Design 02 – Girder 44A.Approach Material 0 – None 44B.Approach Type of Design 00 – None 107.Deck Type 8 – Timber 108A.Wearing Surface 0 – None 108B.Type of Membrane 0 – None 108C.Deck Protection 0 – None

AGE AND SERVICE

27.Year Built Unknown 106.Year

Reconstructed Unknown

42A.Type of Service on 1 – Highway 42B.Type of Service under 5 – Waterway 28A.Lanes on 01 28B.Lanes Under 00 19.Detour Length 5 mi. 29.ADT 5 109.Truck ADT % 30.Year of ADT 2015

GEOMETRIC DATA

48.Length Max Span

37.8 ft. 49.Structure Length 39.9 ft.

50A.Curb/Sidewalk Width Left

0.33 ft. 50B. Curb/Sidewalk Width Right

0.33 ft.

51.Width curb-curb 10 ft. 52.Width Out-Out 12 ft.

47.Route Total Horizontal Clearance 10 ft.

32.Approach Roadway Width (w/ Shoulders) 8 ft.

33.Median 0 – None 34.Skew 00 35.Structure Flared 0 – No 10.Route Min. Vertical Clearance 99.99 53.Min. Vertical Clearance Over Bridge 99.99 54A.Min. Vertical Underclearance Reference N 54B.Min. Vertical Underclearance 0000 55A.Min. Lateral Underclearance Reference N 55B.Min. Lateral Underclearance Right 000 56.Min. Lateral Underclearance Left 000

NAVIGATION DATA

38.Navigation Control 0 – No 39.Vertical Clearance

0000 40.Horizontal Clearance

111.Pier Protection

116.Lift Bridge Vertical Clearance

INSPECTION

91.Frequency 12 mos. 90.Insp. Date 1016 92A.Fracture Critical Frequency

N 93A.Fracture Critical Date

92B.Under Water Frequency

N 93B.Under Water Date

92C.Special Inspection Freq.

N 93C.Special Inspection Date

CLASSIFICATION

12.Base Hwy Network

0 13B.Subroute #

13A.LRS Inventory Route 100.Defense Highway

0 101.Parallel Structure

N

102.Direction of Traffic

3 – 1 lane for 2 way

103.Temporary Structure

104.Highway System

0 112.NBIS

Length

Y

105.Federal Lands Hwy

0 110. National Truck Network

20.Toll Facility

3 – Free 26.Functional Class

09 – Local rural

37.Historical Significance 5 – Not eligible 22.Owner 68 – BLM 21.Maintenance Responsibility 68 – BLM

CONDITION

58.Deck 6 59.Super 2 60.Sub 4 62.Culvert N 61.Channel/Channel Protection 4

LOAD RATING AND POSTING

65.Inventory Rating Method

5- No rating performed

63.Operating Rating Method

5- No rating performed

66.Inventory Rating

64.Operating Rating

31.Design Load 0-Unknown 70.Posting 0 41.Posting Status K - Closed

APPRAISAL

36A.Bridge Rail 0 36B.Transition N 36C.Approach Rail

N 36D.Approach Rail Ends

N

71.Waterway Adequacy

6 72.Approach Alignment

113.Scour Critical 6

PROPOSED IMPROVEMENTS

94.Bridge Cost 95.Roadway Cost

76.Length of Improvement

96.Total Cost 114.Future

ADT

97.Year of Cost Estimate

115.Year of Future ADT

75A.Type of Work 75B.Work Done By

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CRITICAL FINDINGS

Were any Critical Findings identified?: No If Yes, provide detailed explanation:

Now that the bridge has been closed the critical finding from the last inspection has been resolved.

FOLLOW-UP PLAN

If a Critical Finding was identified, what is the recommended Follow-Up Plan?:

STRUCTURE EVALUATION SUMMARY

San Vicente Creek Bridge 2 is in critical condition and required immediate closure. The bridge cannot be rehabilitated considering the scour under Abutment 1 and the advanced corrosion of the railcar superstructure. If the Field Office determines that a bridge is needed in this location, then a new bridge will need to be constructed. The estimated cost of demolishing the existing bridge and constructing a new bridge is $595,300. This includes an allocation of 12% to account for BLM administrative costs, 15% survey and design fees and 2% available for overhead. A breakdown of the cost is included at the end of this report. The full cost estimate is available upon request.

The NOC provides bridge inspection services upon request for bridges under the jurisdiction of the Bureau of Land Management (BLM). The bridge inspections services provided are in compliance with the National Bridge Inspection Standards (NBIS). As a minimum, any BLM owned, public vehicular structures having an overall length of 20 feet or greater should be inspected in accordance with the NBIS. Tunnels, trail bridges, major culverts and other significant structures may be inspected upon request.

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FIELD INSPECTION REPORT

CONDITION RATING CODES FOR ITEMS 58 - 62

N NOT APPLICABLE

9 EXCELLENT CONDITION

8 VERY GOOD CONDITION - no problems noted.

7 GOOD CONDITION - some minor problems.

6 SATISFACTORY CONDITION - structural elements show some minor deterioration.

5 FAIR CONDITION - all primary structural elements are sound but may have minor section loss, cracking, spalling, or scour.

4 POOR CONDITION - advanced section loss, deterioration, spalling, or scour.

3 SERIOUS CONDITION - loss of section, deterioration, spalling, or scour have seriously affected primary structural components. Local failures are possible.

Fatigue cracks in steel or shear cracks in concrete may be present.

2 CRITICAL CONDITION - advanced deterioration of primary structural elements.

Fatigue cracks in steel or shear cracks in concrete may be present or scour may have removed substructure support. Unless closely monitored it may be necessary to close the structure until corrective action can be taken.

1 IMMINENT FAILURE CONDITION - major deterioration or section loss present in critical structural components or obvious vertical or horizontal movement affecting structure stability. Structure is closed to traffic but corrective action may return structure to light service.

0 FAILED CONDITION - out of service; beyond corrective action.

CONDITION RATING CODE EQUIVALENTS FOR SUB-ELEMENTS

G = GOOD (CODES 7 - 9)

F = FAIR (CODES 5 - 6)

P = POOR (CODES 0 - 4)

58 Deck Condition 6 – Satisfactory

1. DECK SLAB F Notes (w/item reference):

58.1 – Hammer sounding yielded some minor decay in the deck. There is no apparent connection between the deck boards and the superstructure.

58.5 – The curbs are only a few inches tall and would not be able to deflect a tire.

2. EXPANSION JOINTS N

3. WEARING SURFACE N

4. RIDEABILITY F

5. CURBS, SIDEWALK AND MEDIAN P

6. PARAPETS AND/OR RAILINGS N

7. DRAINS AND DRAINAGE N

8. UTILITIES N

9. DEFLECTION AND/OR VIBRATION F

10. OTHER

59 Superstructure Condition 2 – Critical

1. BEARING DEVICES P Notes (w/item reference):

59.1 – There is no apparent connection between the steel bearing plate and the concrete stem wall. Bearing seats are covered in soil.

59.2 – Substantial corrosion throughout the superstructure with spots of 100% section loss. G1 and G4 are in fair condition, but these girders are located outside the roadway width so they see little to no load. There are no diaphragms so the girders are assumed to deflect independently with virtually all of the live load being carried by the heavily corroded railcar superstructure.

2. GIRDERS OR BEAMS P

3. ARCHES OR SLABS N

4. FLOOR BEAMS AND STRINGERS N

5. TRUSSES N

6. DIAPHRAGMS AND BRACING N

7. PAINT N

8. CONNECTIONS/WELDS P

9. DEFLECTION AND/OR VIBRATION F

10. ALIGNMENT F

11. OTHER

60 Substructure Condition 4 – Poor

Abutments Notes (w/item reference):

60.5 – The Abutment 1 footing has been undermined by 4’ and the foundation is compromised.

1. BREASTWALLS OR COLUMNS G

2. PILE BENTS N

3. CAPS AND/OR BEARING SEATS F

4. BACKWALLS AND/OR BULKHEADS F

5. FOUNDATIONS P

6. WINGWALLS N

7. WEEP HOLES N

8. EXPANSION JOINTS N

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Substructure Condition, con’t.

9. EROSION AND/OR SCOUR P 60.9 – The A1 footing has been undermined and large boulders and concrete blocks have been washed away. There is 4’ of lateral undermining under the A1 footing for a 4’ length.

60.11‐ Large rip‐rap at both at A1 is still allowing scour to occur.

10. SETTLEMENT OR DEFLECTION F

11. SLOPE PROTECTION F

12. OTHER

Piers Notes (w/item reference): NA

13. WALLS AND/OR COLUMNS

14. PILE BENTS

15. CAPS AND/OR BEARING SEATS

16. FOUNDATIONS

17. EROSION AND/OR SCOUR

18. SETTLEMENT OR DEFLECTION

19. OTHER

61 Channel and Channel Protection Condition 4‐ Poor

1. ALIGNMENT P Notes (w/item reference):

61.1 – The channel turns sharply u/s.

61.2 – The stream has washed out large boulders and concrete blocks which indicated that the stream has a very high velocity during floods.

61.4 – There is a down tree about 20’ u/s of the bridge.

2. EROSION AND/OR SCOUR P

3. CHANNEL PROTECTION P

4. WATERWAY OBSTRUCTIONS P

5. ADEQUACY OF OPENING G

6. STREAMBED COMPOSITION G

7. OTHER

62 Culverts N – NA

1. BARREL(S) Notes (w/item reference):

2. FOOTINGS

3. HEADWALLS

4. WINGWALLS

5. DEBRIS AND/OR SILT

6. EROSION AND/OR SCOUR

7. SETTLEMENT AND/OR

DEFLECTION

8. ADEQUACY OF COVER

9. PARAPETS AND/OR RAILINGS

10. ROADWAY SURFACE

11. RIDEABILITY

12. OTHER

ASSESSMENT

71 Waterway Adequacy 6

72 Approach Roadway Alignment 3

113 Scour Critical Bridges (0‐9, T, U, N) 6

36A Safety Features – Railing (0‐Doesn’t meet Standards, 1‐Meets Standards, N‐NA) 0

36B Safety Features – Transitions Railing (0‐Doesn’t meet Standards, 1‐Meets Standards, N‐NA) N

36C Safety Features – Approach Railing (0‐Doesn’t meet Standards, 1‐Meets Standards, N‐NA) N

36D Safety Features – Terminal Railing (0‐Doesn’t meet Standards, 1‐Meets Standards, N‐NA) N

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STRUCTURE LOAD RATING

Design Rating Inventory Rating (RF) Operating Rating (RF)

HL-93

Legal Rating Rating (RF) Type 3 Type 3S2 Type 3-3 Notional Rating Load (NRL)

Design Loading Level:

Place X next to appropriate load rating description:

Original Design Load Valid Original Design Load Not Valid Original Load Rating Calculation Valid Original Load Rating Calculation Revised Date of Load Rating Calculation:

Load Rating Controlled By:

*Note* - If the Rating Factor (RF) for the HL-93 loading is > 1.00, then the legal loads (3, 3S2, 3-3) do not need to be calculated.

Load Rating Remarks:

The bridge has been closed. No load rating has been performed.

Detailed Notes/Deficiency Descriptions:

The hydraulic clearance between the upstream girder and the thalweg is 11.75 ft.

The best estimate for the construction year of the bridge is 1970. This means that the bridge is at least 45 years old and that the railcar superstructure is likely much older than that. Typically, railcars only become bridges after they have been discarded from the railroad company due to damage or age. Structural integrity of the abandoned steel is questionable.

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RECOMMENDED WORK AND ESTIMATED COSTS

ESTIMATED REMAINING LIFE (YEARS)? 0 years (At current load limits without major repairs or rehabilitation.)

IMPROVEMENTS RECOMMENDED? Yes

PURPOSE OF RECOMMENDED IMPROVEMENT? 3

1 - Maintenance 2 - Rehabilitation and/or Reconstruction 3 – Construction

PRIORITY OF IMPROVEMENT? A

A - Structure is closed, in imminent danger of collapse, presents a critical safety hazard, or meets all three of the following criteria:

1) Has a severe structural inadequacy; 2) Has a high traffic volume; 3) Is of vital importance to the community or area.

B - Structure is critically deficient or presents a safety hazard, but can remain in service at reduced loads with frequent inspections.

C - Structure is deficient, functionally obsolete, or requires a high degree of maintenance.

D - Structure is generally in good condition. Preventative maintenance may be required.

E - Structure is under construction or reconstruction.

REF.

NO.

ITEM

NO.

RECOMMENDATIONS

ESTIMATED COSTS

MAINT.

REHAB.

CONSTR.

Replace Bridge

$572,000

TOTAL ESTIMATED COSTS:

$572,000

Costs estimated above are for labor and materials only, and do not reflect additional costs associated with a construction contract, including equipment mobilization, traffic control, contract administration, roadway related construction, and overhead.

COST ESTIMATES

Cost developed by John Treacy at the NOC.

Remove existing bridge (40'L x 12'W) superstructure consisting of: timber deck (curb, transverse boards) over 4 each railcar beams x 40' and 2 each (W 16x40) x 40' steel beams;

substructure consisting of: CIP concrete abutments and footing. Replacement bridge (45'L x 16'W) with superstructure consisting of pre-stressed concrete box girders with bridge rail;

substructure consisting of CIP concrete abutments. Miscellaneous items: minor structure excavation/backfill, clear & grub, riprap, aggregate surfacing, site restoration.

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ADDITIONAL PHOTOGRAPHS

Caption 1: Bridge approach. Closure signs are posted on both sides of the bridge.

Caption 2: A landslide 100’ west of the bridge restricts traffic as well. The slope failure occurred since the last inspection.

Caption 3: Looking at A1. Heavy flows have washed out some of the concrete and boulder slope protection.

A close up on the void is shown in Photo 4.

Caption 4: Looking at the exposed concrete footing at A1. 4’ of undermining was measured under the concrete footing.

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Caption 5: Heavy corrosion of the steel railcar superstructure.

Caption 6: Close up on the steel section loss on the railcar superstructure.

Caption 7: Bottom flange of the railcar exhibits 100% section loss due to corrosion.

Caption 8: Elevation view looking downstream. Large down tree upstream of the bridge could lead to waterway obstructions.

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Caption 9: General view of A2. Footing is exposed, but the abutment resides outside the main channel.

Caption 10: General view of the bearing area at A2.

The bearing is covered in soil which increases the corrosion rate.

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UNITED STATES DEPARTMENT OF THE INTERIOR

BUREAU OF LAND MANAGEMENT

CONTRACT ESTIMATE SUMMARY

Contract/Project Name Estimator Date

San Vicente Creek Bridge #2

JJT 11/25/2015

Project Location

Contract Number

Near Davenport, CA - Santa Cruz County - approx. 15 miles North of Santa Cruz NA

Project Description

Remove existing bridge (40'L x 12'W) superstructure consisting of: timber deck (curb, transverse boards) over 4 each railcar beams x 40' and 2 each (W 16x40) x 40' steel beams; substructure consisiting of: CIP concrete abutments and footing.

Replacement bridge (45'L x 16'W) with superstructure consisting of prestressed concrete box girders with bridge rail;

substructure consisitng of CIP concrete abutments. Miscellaneous items: minor structure excavation/backfill, clear & grub, riprap, aggregate surfacing, site restoration.

Item

Spec.

Bid No. Description Unit Quantity Unit Price

Cost Amount

1 Mobilization/Demobilization LS 1.00 $27,780.00 $27,780.00

2 Clearing & Grubbing LS 1.00 $6,951.00 $6,951.00

3 Remove & Dispose of Existing Bridge LS 1.00 $36,798.00 $36,798.00

4 Structure Excavation CY 1237.00 $32.00 $39,584.00

5 Structure Backfill (use excavated material) CY 1237.00 $47.00 $58,139.00

6 Structural Concrete CY 101.00 $1,522.00 $153,722.00

7 Pre-stressed Concrete Box Girders w/ W-Beam Bridge Rail LS 1.00 $101,044.00 $101,044.00

8 Riprap CY 180.00 $89.00 $16,020.00

9 Aggregate Surfacing, 6" Thick Ton 54.00 $65.50 $3,537.00

Total Estimated Construction Cost $443,575.00

BLM Administrative Costs LS 12% $443,575.00 $53,229.00

Engineering & Design Fees LS 15% $443,575.00 $66,536.25

Miscellaneous Costs - Reports & Investigations LS 2% $443,575.00 $8,871.50

Total Estimated Project Cost $572,211.75

Five Year Planning Costs based on annual inflation rate of 2%

Current Year Project Cost (2015) $572,211.75

Inflation Adjusted Project Cost (2016) $583,655.99

Inflation Adjusted Project Cost (2017) $595,329.10

Inflation Adjusted Project Cost (2018) $607,235.69

Inflation Adjusted Project Cost (2019) $619,380.40

Inflation Adjusted Project Cost (2020) $631,768.01