A003_61520-00039_Duval Coulee_2022_Inspection Full Report.pdf

BRIDGE INSPECTION AND APPRAISAL REPORT

DUVAL COULEE

Bridge Number: 61520-00039

Charles M. Russell National Wildlife Refuge

Region 6

U.S. Fish & Wildlife Service

Type of Inspection: Routine

Date of Inspection: 7/27/2022

Prepared By: Short Elliott Hendrickson, Inc

Prepared For: National Wildlife Refuge System Infrastructure Management Division Falls Church, VA

Date of Report: 9/15/2022

Type of Report: Full

PrintDate: 10/14/2022

61520-00039 9/15/2022 Rpt V4.2.1

Bridge Identification, Use, & Summary of Findings

225 Date of Report 9/15/2022

090 Inspection Date 7/27/2022

Inspector Organization Short Elliott Hendrickson, Inc

Lead Inspector Paul J. Jordan, P.E.

The summary condition of the bridge is VERY GOOD.

The bridge rail sections are lapped incorrectly at the northwest and northeast corners of the bridge. There are (4) bolts missing at all splices of the 'W' beam rail at the bridge rails. There is up to 3" of gravel on top of the deck. The grouted riprap under the bridge is broken up and is being undermined and several boulders have fallen into the channel. Tall vegetation growing at the corners of the bridge reduces visibility.

226 Type Use The bridge provides FWS and public access to the northwest region of the refuge and carries Road 101 which is designated a Self-guided Nature Tour.

213 Public Use Y 030 Year of ADT 22

029 Average Daily Traffic 000200212 In-Use Y

209 Type Construction/Materials Prestressed concrete triple tees on concrete abutments.

108 Wearing Surface Monolithic Concrete

107 Deck Str Type Other

106 Year Rebuilt 0000

052 Deck Width 026.0

051 Bridge Roadway Width 022.5

049 Structure Length 000032

048 Max Span Length 0031

045 Number of Main Spans 001

043 Structure Type Prestressed Concrete Tee Beam

027 Year Built 2006

265 Asset Number 10025069

204 Bridge Number 61520-00039

203 Bridge Name DUVAL COULEE

009 Location SECT 34 T22N R24E

007 Facility Carried ROAD 101

006 Feature Intersected DUVAL COULEE

003 County 71 (Phillips County)

001 State 308 (Montana)

201 Region 6202 Station Charles M. Russell National Wildlife Refuge

Summary of Findings

Bridge Use

Bridge Features

Bridge Identification & Location ft, xxx.x ft, xxx.x xxx ft, xxxxxx ft, xxxx xxxxxx yy

PrintDate: 10/14/2022

Recommended Work & Estimated Costs Estimated Remaining Life (Item 219, Years): >10 (At current load limits without major repairs or rehabilitation)

ReplacementMaint/Repair/ Rehab

Priority Assessment

Recommendation (See Footnote 1)Item

Urgent Item j.

i.

h.

g.

f.

e.

d.

c.

b.

a.

Future Year Cost:

$19,547

Current Year Cost:

$17,729

Proj Total for Year of Est:

$12,000

Subtotal: $12,000

G.A.S.

Construction Management:

Preliminary Design

Planning/ Design/ Const. Mgmt:

Construction Contingency:

Construction Estimate:

$12,000

$17,7293Place riprap in bottom of channel under bridge to support the remainder of the existing riprap and inhibit loss of more riprap. Grouted Riprap: 40 Cubic Yards at $300/cubic yard = $12,000.

PrintDate: 10/14/2022

ReplacementMaint/Repair/ Rehab

Priority Assessment

Recommendation (See Footnote 1)Item

Urgent Item j.

i.

h.

g.

f.

e.

d.

c.

b.

a.

Future Year Cost:

$664

Current Year Cost:

$603

Proj Total for Year of Est:

$370

Subtotal: $370

G.A.S.

Construction Management:

Preliminary Design

Planning/ Design/ Const. Mgmt:

Construction Contingency:

Construction Estimate:

$370

$6035Cut vegetation on shoulders near bridge to improve visibility.

Labor: 8 Hours at $40/hour = $320, Adjustment for Location:

$50.

Urgent Item j.

i.

h.

g.

f.

e.

d.

c.

b.

a.

Future Year Cost:

$352

Current Year Cost:

$320

Proj Total for Year of Est:

$290

Subtotal: $290

G.A.S.

Construction Management:

Preliminary Design

Planning/ Design/ Const. Mgmt:

Construction Contingency:

Construction Estimate:

$290

$3205Clean dirt and gravel from deck surface to reduce abrasion.

Labor: 6 Hours at $40/hour = $240, Adjustment for Location:

$50.

PrintDate: 10/14/2022

ReplacementMaint/Repair/ Rehab

Priority Assessment

Recommendation (See Footnote 1)Item

Urgent Item j.

i.

h.

g.

f.

e.

d.

c.

b.

a.

Future Year Cost:

$742

Current Year Cost:

$673

Proj Total for Year of Est:

$340

Subtotal: $340

G.A.S.

Construction Management:

Preliminary Design

Planning/ Design/ Const. Mgmt:

Construction Contingency:

Construction Estimate:

$340

$6736Reassemble bridge and approach rail where incorrectly lapped in direction of traffic flow and install (4) bolts where missing in (3) splices on each side. Material: $50, Labor: 8 Hours at $30/hour=$240, Adjustment for Location: $50.

Footnotes:

1/Recommended work are items noted by the inspection team on the date of inspection. Urgent items are those which pose a current threat to the strength or stability of the bridge, or involve a significant safety concern. Items are listed in their order of importance. Item 1 considered most important. Adjustments for location include geographical region and remoteness of the bridge adjustment. For multi-use structures such as water control structures or dam spillways, repair or reconstruction estimates, if applicable, are for the bridge component only.

2/Item c., when needed, is used for items up to $100,000 in construction value, except replacements, and includes a mark-up of approximately 18% assuming MMS program accomplishment. If the item is accomplished by other than MMS, the mark-up should be adjusted accordingly.

3/Items d. and e., when needed, are used for replacements, and work items over $100,000 in construction value, and use a sliding scale based on the construction estimate. If the item is accomplished by MMS, the mark-up should be adjusted accordingly.

4/Priority assessment value is a reflection of the criticality of a recommendation, with a value of 1, 2, or 3 representing a high priority safety hazard that requires immediate attention, and a 7 representing a non-urgent repair with little-or-no safety ramifications.

$19,325Totals

PrintDate: 10/14/2022

40.0

T3-3

T3S2

T3

HS20 36.0

303 Sign Recommendation Remarks

302 Sign Status 'Weight Limit 15 Tons' signs are in place at both approaches. 'One Lane Bridge' signs are in place at both approaches.

Object markers are in place.

301 Sign Recommendations No load posting required. Install object markers at all corners of the bridge.

TRIPLE TEEElement

The load rating from 2008 is still considered valid. No significant changes in the condition of the bridge which would affect the rating were observed during the 2022 inspection. The load capacity and weight limit posting recommendations remain as shown above.

306 Rating Verified By Paul Jordan, 7/27/2022305 Rating Prepared By Jason Triplett, 7/17/2008

304 Load Rating Remarks TRIPLE TEE: Prestressed concrete triple tee with no topping, asphalt or fill, 10" deep stems, 6" thick deck, 6'-4 1/2" wide tees, spanning 31'-3". Details of prestressed reinforcing are not known. The rating is empirical based on the condition of the structure.

Project leaders (and others) should be aware that the posting recommendations are for the absolute maximum load levels to which a structure may safely be subjected for limited passages of the loads. Should the need arise to subject the bridge to sustained loading at or near this level, the Project Leader should contact the Regional Engineer for guidance regarding an appropriate safe load capacity.

Load posting recommendations are based on Operating rating values. See note regarding posting recommendations, below.

Op = Operating RatingIn = Inventory Rating

Important Note Regarding Posting Recommendations

Load Ratings (Tons)

Sign Recommendations

Sign Recommendations & Load Ratings

In In In In InOp Op Op Op Op

310 Element 1 320 Element 2 330 Element 3 340 Element 4 350 Element 5

PrintDate: 10/14/2022

Additional Information & Comments

211 Description of Bridge The bridge was constructed in 2006 and consists of one span of simply supported, prestressed concrete triple tee girders with no additional topping slab. The span is supported on the concrete abutments.

255 Comparison to Previous Inspection There are no significant changes in the condition of the bridge since the previous inspection. Scour continues to damage the grouted riprap under the bridge with several boulders missing.

256 Next Inspection Recommendations The next inspection for this bridge is recommended as a routine inspection with a full report in two years.

257 Additional Comments

PrintDate: 10/14/2022

Condition Ratings (Items 218, 58, 59, 60) Code Condition Description

N Not applicable

9 Excellent

8 Very Good No problems noted.

7 Good Some minor problems noted.

6 Satisfactory Structural elements show some minor deterioration.

5 Fair All primary structural elements are sound but may have minor section loss, cracking, spalling, or scour.

4 Poor Advanced section loss, deterioration, spalling, or scour.

3 Serious 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 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 bridge until corrective action is taken.

1 Imminent Failure Major deterioration or section loss present in critical structural components or obvious vertical or horizontal movement affecting structure stability. Bridge is closed to traffic but corrective action may put back in light service.

0 Failed Out of service; beyond corrective action.

PrintDate: 10/14/2022

218 Approaches Item Condition

Rating Remarks

218 Approaches 7

218.01 Approach Slab N

218.02 Relief Joints N

218.03 Approach Guardrail 7

218.04 Surfacing 7

218.05 Embankment N

218.06 Signs 7

218.07 Vegetation 6

Short sections of 'W' beam rail on one timber post blocked out with buffered end sections.

Gravel - Areas of washboard. 2" deep potholes within 15' of bridge.

'Weight Limit 15 Tons' signs at both approaches. West Load Limit sign is bent. 'One Lane Bridge' signs at both approaches. Object markers, black and yellow, at corners of bridge are in accordance with MUTCD - Damaged at southeast by shotgun blasts.

Tall vegetation growing at all four corners of bridge.

PrintDate: 10/14/2022

058 Deck

Rating Remarks

058 Deck 8

058.01 Deck Structure 8

058.02 Expansion Joints N

058.03 Wearing Surface 8

058.04 Rideability N

058.05 Curbs N

058.06 Parapets/Railings 7

058.07 Drains/Drainage N

058.08 Cleanliness 6

058.09 Utilities N

058.10 Lighting N

Top flanges of prestressed triple tee girders.

Double nested galvanized "W" beam rail on steel wide flange posts, blocked out with timber - Lapped incorrectly on both sides, (4) bolts missing at each splice, (3) locations, on each side.

0"-2" gravel across deck with ridges of gravel up to 4" deep at edges.

PrintDate: 10/14/2022

059 Superstructure

Rating Remarks

059 Superstructure 8

059.01 Bearing Devices 8

059.02 Girders 8

059.02A Diaphragms N

059.02B Bracing N

059.03 Floor Beams N

059.04 Stringers N

059.05 Trusses N

059.05A Portals N

059.05B Bracing N

Tee stems bear on 1/2" thick elastomeric pads, center stem of each triple tee bolted and angles bolted to tops of concrete abutments. Anchor bolts to abutments have light to moderate corrosion.

Prestressed concrete triple tees with grouted joints between flanges.

Signs of leakage and light rust staining on undersides of joints.

Insignificant cracks in grout in joints on deck surface. Continuous plates embedded in bottom of beam flanges. Light corrosion on steel plates.

PrintDate: 10/14/2022

059 Superstructure (cont)

Rating Remarks

059.06 Paint N

059.07 Splices and Connections N

059.08 Rivets & Bolts N

059.09 Welds N

059.10 Corrosion N

059.11 Timber Decay N

059.12 Deflection N

059.13 Vibration Under Load N

059.14 Collision Damage N

PrintDate: 10/14/2022

RemarksCondition Rating

Item

060 Substructure

060 Substructure 8

060.01 Wings 8

060.02 Backwalls/Bulkheads 7

060.03 Bearing Seats 8

060.04 Breastwalls/Columns 8

060.05 Weep Holes N

060.06 Footings/Sills N

060.07 Piles/Bracing N

060.08 Erosion/Scour 5

060.09 Settlement N

Concrete, swept back.

Light cracks in backwall ends at concrete ledge.

Concrete.

Concrete.

Grouted riprap is undermined by scour and is breaking up but structure is protected.

ABUTMENTS

PrintDate: 10/14/2022

RemarksCondition Rating

Item

060 Substructure (cont)

060.10 Bearing Seats N

060.11 Caps N

060.12 Columns/Walls N

060.13 Piles/Bracing N

060.14 Footings/Sills N

060.15 Erosion/Scour N

060.16 Settlement N

PIERS

PrintDate: 10/14/2022

Condition Ratings (Item 61 Channel) Code Description

N Not applicable. Bridge is not over a waterway.

9 There are no noticable or noteworth deficiencies which affect the condition of the channel.

8 Banks are protected or well vegetated. River control devides such as spur dikes and embankment protection are not required or are in a stable condition.

7 Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift.

6 Bank is beginning to slump. River control devices and embankment protection have widespread minor damage.

There is minor stream bed movement evident. Debris is restricting the channel slightly.

5 Bank protection is being eroded. River control devices and/or embankment have major damage. Large deposits of debris are in the channnel.

4 Bank and embankment protection is severely undermined. River control devices have severe damage. Large deposits of debris are in the channel.

3 Bank protection has failed. River control devices have been destroyed. Stream bed aggradation, degradation or lateral movement has changed the channel to now threaten the bridge and/or approach roadway.

2 The channel has changed to the extent the bridge is near a state of collapse.

1 Bridge closed because of channel failure. Corrective action may put back in light service.

0 Bridge closed because of channel failure. Replacement necessary.

PrintDate: 10/14/2022

061 Channel and Channel Protection

Rating Remarks

061 Channel & Channel Protection

061.01 Scour/Erosion 5

061.02 Channel Protection 4

061.03 Spur Dikes/Jetties N

061.04 Waterway

Obstructions

N

061.05 Adequacy of Opening 6

061.06 Normal Velocity 6

060.17 Average Opening N

060.18 Stream Bed Material 7

061.05 Adequacy of Opening Barely

Sufficient

061.06 Normal Velocity High

The west bank downstream is vertical. Scour has undermined the grouted riprap on both sides of the channel. There is also a 2 foot scour hole directly under the bridge. Channel degraded 1' to 2' between 2016 and 2018 inspection and 1 1/2' between 2018 and 2020 inspections.

Scour hole beneath grouted riprap at end of southwest wingwall.

Grouted boulder-sized riprap on geotextile fabric in front of both abutments, extends 15' upstream and downstream - Some boulders missing, grout is broken up and undermined, geotextile fabric exposed in several locations. Riprap slumped into channel at bottom of both slopes, worst is along west bank. Old timber abutments that were encased by grouted riprap are visible again. Geotextile fabric is exposed on west bank for 75' downstream. Undermining of grouted riprap on both sides of channel has caused some riprap to wash downstream.

Mud spatter on the underside of the bridge indicates waterway opening may be insufficient.

Scour depression in channel under bridge approximately 2' deeper than normal channel, caused by high velocity flow. Channel degraded 1' to 2' between 2016 and 2018 inspection and 1 1/2' between 2018 and 2020 inspection.

Silt.

PrintDate: 10/14/2022

Condition Ratings (Item 62 Culverts) Code Description

N Not applicable. Structure is not a culvert.

9 No deficiencies.

8 No noticable or noteworty deficiencies which affect the condition of the culvert. Insignificant scrape marks caused by drift.

7 Shrinkage cracks, light scaling, and insignificant spalling which does not expose reinforcing steel. Insignificant damage caused by drift with no misalignment and not requiring corrective action. Some minor scouring has occurred near curtain walls, wingwalls, or pipes. Metal culverts have a smooth symmetrical curvature with superficial corrosion and no pitting.

6 Deterioration or initial disintegration, minor chloride contamination, cracking with some leaching, or spalls on concrete walls, wingwalls, or pipes. Metal curverts have a smooth curvature, non-symmetrical shape, significant corrosion or moderate pitting.

5 Moderate to major deterioration or disintegration, extensive cracking and leaching, or spalls on concrete or masonry walls and erosion at curtain walls, wingwalls, or pipes. Metal culverts have significant distortion and deflection in one section, significant corrosion or deep pitting.

4 Large spalls, heavy scaling, wide cracks, considerable efflorescence, or opened construction joint permitting loss of backfill. Considerable settlement or misalignment. Considerable scouring or erosion at curtain walls, wingwalls or pipes. Metal culverts have significant distortion and deflection throughout, extensive corrosion or deep pitting.

3 Any condition described in Code 4 but which is excessive in scope. Severe movement or differential settlement of the segments, or loss of fill. Holes may exist in walls or slabs. Integral wingwalls nearly severed from culvert.

Severe scour or erosion at curtain walls, wingwalls or pipes. Metal culverts have extreme distortion and deflection in one section, extensive corrosion, or deep pitting with scattered perforations.

2 Integral wingwalls collapsed, severe settlement of roadway due to loss of fill. Section of culvert may have failed and can no longer support embankment. Complete undermining at curtain walls and pipes. Corrective action required to maintain traffic. Metal culverts have extreme distortion and deflection throughout with extensive perforations due to corrosion.

1 Bridge closed. Corrective action may put back in light service.

0 Bridge closed. Replacement necessary.

PrintDate: 10/14/2022

062 Culverts

Rating Remarks

062 Culvert(s) N

062.01 Embankment

062.02 Surfacing

062.03 Shoulders

062.04 Headwalls

062.05 Wingwalls

062.06 Barrel

062.07 Footings

062.08 Design Opening

062.09 Opening Remaining

062.10 Debris/Silt

062.11 Erosion/Scour

062.12 Grade Percent

PrintDate: 10/14/2022

036 Traffic Safety Features Item Assessment Remarks

036A Bridge Rail 1 Double nested galvanized "W" beam rail on steel wide flange posts blocked out with timber.

036B Transitions 0

036C Approach Rail 0

036D End Treatment 0

Attached, not gradually stiffened. Long span between last bridge rail post and first approach rail post.

Buffered end sections, not anchored or protected.

Galvanized "W" beam transitions immediately to end sections - Too short, lapped incorrectly at northwest and northeast corners.

0 Does not meet current FWS new rail guidelines 1 Meets current FWS guidelines N Not applicable or a safety feature is not required

Traffic Safety Features Legend:

113 Scour Critical Bridges Item Assessment Remarks

113 Scour Critical Bridges 4 Stable; Action Required. Bridge foundations determined to be stable for assessed or calculated scour conditions; field review indicates action is required to protect exposed foundations (see HEC 23). The west bank downstream is vertical. Scour has undermined the grouted riprap on both sides of the channel. There is also a 2 foot scour beneath the bridge. Scour Screening recommends conducting a HEC-18 Scour Evaluation.

041 Bridge Posting Item Assessment Remarks

041 Bridge Posting P Posted for load (may include other restrictions such as temporary bridges which are load posted). Posted 'Weight Limit 15 Tons' at both approaches. Load posting is not required.

PrintDate: 10/14/2022 ft

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Structure Number/Name: 61520-00039/DUVAL COULEE STRUCTURE

View down centerline of bridge roadway looking east

Elevation looking upstream

Elevation looking downstream

Load posting sign at east approach

Load posting sign at west approach

Vegetation encroaching into roadway at southwest corner, similar at other corners

Gunshot damage to southeast object marker; note vegetation obscuring object marker

Potholes in south wheel-line in east approach

Gravel on bridge deck

Bridge rail lapped incorrectly on south side, similar at north; note missing bolts

Intermediate posts omitted from approach rails, northeast rail shown

Cracks in grout at joints between flanges of prestressed girder sections

Rust staining in joints between girders, first and second girders from south shown

Displaced riprap in downstream channel, with exposed geotextile and sloughing banks

Scour and erosion at the southwest wingwall

Vertical banks in downstream channel

Undermined grouted riprap at west abutment of north side

General view of underside of bridge

Upstream channel looking north

Looking east

Downstream channel looking south

Looking west