FY15 CottonwoodCampgroundTrailBridgeSite1 InspRpt_0002.pdf

Cottonwood Campground Trail Bridge- Site 1 Lander Field Office FAMS Location #: L2016083 Inspection Date: 8/25/2015

1 | P a g e

IDENTIFICATION PHOTOGRAPH

Looking Ahead On Line

General Bridge Description:

Cottonwood Campground Trail Bridge- Site 1 is located within the Cottonwood Campground on the access trail to Campsite #1. Abutment 1 is located on the right side looking downstream and Abutment 2 is on the left.

There is no separate wearing surface for this bridge. The traffic bears directly on the deck planks. There are 15– 3x12” Transverse deck planks. The railing consists of 4” to 6” diameter timber logs that are used for the rails and posts. Each beam consists of a pair of 3x12” members, on edge, back-to-back, one pair on each side of the deck spaced at 3’-9½”, center-to-center.

The bearing devices consist of two 6x6” treated sills on top of the concrete abutment at Abutment 2 and one 6x6” treated sill on top of the concrete abutment at Abutment 1. The concrete abutments were set on a native foundation consisting of a combination of soil and cobbles. The backwall consists of rock and mortar at Abutment 1 and timber at Abutment 2.

The wingwalls consist of sawn timber members at three locations and rock and mortar at the other location.

2 | P a g e

STRUCTURE INVENTORY AND APPRAISAL SHEET

Sufficiency Rating:

*Cottonwood Campground Trail Bridges are non-vehicular. Not all fields have 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, 5-Poor, etc). Items 67, 68, and 69 are automatically calculated by FHWA and do not need to be populated.

IDENTIFICATION

1.State 568- WY 8.Struc. # NA 2.Hwy District 7.Facility

Carried Site 1 Trail

3.County Code

013- Fremont

9.Location 60 mi SE of Lander, WY

6.Feature Intersected E. Cottonwood Creek 5A.On/Under 5B.Rte Sign.

5C.Lvl. Serv. 5D.Rte. # 5E.Directional Suffix

98A.Border State Code

98B.Border % Responsible

99.Border Bridge #

4.Place Code 00000 11.Mile Post 0.0 mi 16.Latitude 42.36312° 17.Longitude -107.68482°

STRUCTURE TYPE AND MATERIALS

46.# Approach Spans

0 45.# of Spans Main Unit

43A.Structure Material 7- Timber 43B.Structure Type of Design 02- Girder 44A.Approach Material 0- No approach spans 44B.Approach Type of Design 00- No approach spans 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

42A.Type of Service on 3- Pedestrian 42B.Type of Service under 5- Waterway 28A.Lanes on 28B.Lanes Under 19.Detour Length 29.ADT 109.Truck ADT % 30.Year of ADT

GEOMETRIC DATA

48.Length Max Span

13 ft. 49.Structure Length 15.67 ft.

50A.Curb/Sidewalk Width Left

0 ft. 50B. Curb/Sidewalk Width Right

0 ft.

51.Width curb-curb 3.8 ft. 52.Width Out-Out 5.3 ft.

47.Route Total Horizontal Clearance 3.8 ft.

32.Approach Roadway Width (w/ Shoulders) 3 ft.

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

NAVIGATION DATA

38.Navigation Control 39.Vertical Clearance

40.Horizontal Clearance

111.Pier Protection

116.Lift Bridge Vertical Clearance

INSPECTION

91.Frequency 48 mos. 90.Insp. Date 0815 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

13B.Subroute #

13A.LRS Inventory Route 100.Defense Highway

101.Parallel Structure

N

102.Direction of Traffic

103.Temporary Structure

104.Highway System

112.NBIS

Length

Y- But non-vehicular

105.Federal Lands Hwy

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 6 60.Sub 6 62.Culvert N 61.Channel/Channel Protection 7

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 7- Ped 70.Posting 41.Posting Status A- Open, no restrictions

APPRAISAL

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

N 36D.Approach Rail Ends

N

71.Waterway Adequacy

7 72.Approach Alignment

113.Scour Critical 6- Undetermined

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

3 | P a g e

CRITICAL FINDINGS

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

FOLLOW-UP PLAN

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

STRUCTURE EVALUATION SUMMARY

The structure is in fair overall condition. No repairs or maintenance needs were identified at this time except to periodically clean the soil and debris from the top faces of the stringers between the deck planks.

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.

4 | P a g e

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 G Notes (w/item reference):

58.1‐ Some checks and normal weathering in the timber deck. No decay was found.

58.6‐ The railing has some splits and checks but no soft wood was found. The downstream railing is loose. The post spacing is 15 ft. which is inadequate for horizontal loads.

2. EXPANSION JOINTS N

3. WEARING SURFACE N

4. RIDEABILITY G

5. CURBS, SIDEWALK AND MEDIAN N

6. PARAPETS AND/OR RAILINGS F

7. DRAINS AND DRAINAGE N

8. UTILITIES N

9. DEFLECTION AND/OR VIBRATION G

10. OTHER

59 Superstructure Condition 6 – Satisfactory

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

59.1 – The timber sill beams at A2 are uneven which creates an uneven bearing surface for the girders.

59.2 – Some soft wood was found at the top faces between the deck planks where soil accumulates, primarily on the u/s beam.

59.7‐ The paint on the exterior faces of the stringers is in fair condition. The paint on the ends of the deck planks is in poor condition. The paint on the deck members is essentially gone.

2. GIRDERS OR BEAMS G

3. ARCHES OR SLABS N

4. FLOOR BEAMS AND STRINGERS N

5. TRUSSES N

6. DIAPHRAGMS AND BRACING N

7. PAINT F

8. CONNECTIONS/WELDS G

9. DEFLECTION AND/OR VIBRATION G

10. ALIGNMENT G

11. OTHER

60 Substructure Condition 6 – Satisfactory

Abutments Notes (w/item reference):

60.3 – The concrete bearing seat is uneven at A2 which creates an uneven bearing seat for the timber sill beam and the timber girders.

60.6 – The mortar and rock wingwall on the d/s side of A2 is in good condition.

1. BREASTWALLS OR COLUMNS N

2. PILE BENTS N

3. CAPS AND/OR BEARING SEATS F

4. BACKWALLS AND/OR BULKHEADS G

5. FOUNDATIONS G

6. WINGWALLS G

7. WEEP HOLES N

8. EXPANSION JOINTS N

5 | P a g e

Substructure Condition, con’t.

9. EROSION AND/OR SCOUR F 60.9 – There is some slight scour occurring beneath Abutment 1 on the u/s side.

10. SETTLEMENT OR DEFLECTION G

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 7 – Good

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

61.5 – 5’‐7” was measured from the top of the deck planks to the stream thalweg.

This is an increase of 5” from 2011, but the large cobbles in the streambed affect the measurement.

61.6‐ Sand, gravel, cobbles & boulders

2. EROSION AND/OR SCOUR F

3. CHANNEL PROTECTION F

4. WATERWAY OBSTRUCTIONS G

5. ADEQUACY OF OPENING G

6. STREAMBED COMPOSITION G

7. OTHER

62 Culverts 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 7

72 Approach Roadway Alignment 8

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

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

6 | P a g e

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 Revise 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 Cottonwood Campground Trail Bridges are non-vehicular and are not required to be load rated.

Detailed Notes/Deficiency Descriptions:

See deficiency table on pages 4 & 5.

7 | P a g e

RECOMMENDED WORK AND ESTIMATED COSTS

ESTIMATED REMAINING LIFE (YEARS)? 15 Years (At current load limits without major repairs or rehabilitation.)

IMPROVEMENTS RECOMMENDED? No

PURPOSE OF RECOMMENDED IMPROVEMENT?

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

PRIORITY OF IMPROVEMENT?

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.

TOTAL ESTIMATED COSTS:

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

8 | P a g e

ADDITIONAL PHOTOGRAPHS

Caption 1: Elevation view looking u/s. Caption 2: The concrete cap at A2 is uneven which creates point loads on the timber sill beam. No deficiencies were found due to the uneven loading.

Caption 3: Looking at the timber sill beam at A1. There is heavy debris accumulation at A1. The approach to A1 is downhill which increases the amount of soil that gets deposited at A1.

Caption 4: Minor scour was found at the u/s corner of A1.