Supplemental Data SLDW Top Side Inspection v2.pdf

#20212488.001A Page i of iii January 14, 2021 © 2020 Kleinfelder www.kleinfelder.com

Topside Bridge Inspection

SPRING LAKE DAM PEDESTRIAN WALKWAY

OZARK-ST. FRANCIS NATIONAL FOREST

BELLEVILLE, YELL COUNTY, ARKANSAS

KLEINFELDER PROJECT #20212488.001A

January 14, 2021

Copyright 2021 Kleinfelder All Rights Reserved

ONLY THE CLIENT OR ITS DESIGNATED REPRESENTATIVES MAY USE THIS DOCUMENT AND ONLY FOR THE SPECIFIC

PROJECT FOR WHICH THIS REPORT WAS PREPARED.

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#20212488.001A Page ii of iii January 14, 2021 © 2020- Kleinfelder www.kleinfelder.com

A Report Prepared for:

United States Forest Service

Topside Bridge Inspection of the

SPRING LAKE DAM PEDESTRIAN WALKWAY

OZARK-ST. FRANCIS NATIONAL FOREST

BELLEVILLE, YELL COUNTY, ARKANSAS

KLEINFELDER PROJECT #20212488.001A

Inspection Date: 11/18/2020

Inspection Team: Michael Falla, Inspector Tim Merrithew, Inspector Michael Barden, Tender

Report Prepared by:

Michael D. Falla, PLS, Dive Team Leader, NBIS Team Leader

Reviewed by:

Tyler A. Turcotte Project Professional

KLEINFELDER

Central Maine Commerce Center 16 Commerce Drive, Suite 2 Augusta, ME 04330

12/10/2020 Kleinfelder Project No 20212488.001A

#20212488.001A Page iii of iii January 14, 2021 © 2020- Kleinfelder www.kleinfelder.com

TABLE OF CONTENTS

Section Page

1 EXECUTIVE SUMMARY ................................................................................... B-1

2 GENERAL REMARKS & GENERAL CONDITION ............................................ B-2

3 INSPECTION NOTES …………...…………………………...……………………..B-3

4 PICTURES……………..………………………………………………..……………B-7

#20212488.001A B-1 January 14, 2021

SPRING LAKE DAM PEDESTRIAN WALKWAY

OZARK-ST. FRANCIS NATIONAL FOREST

BELLEVILLE, YELL COUNTY, ARKANSAS

KLEINFELDER PROJECT #20212488.001A

1 EXECUTIVE SUMMARY

On November 18th, 2020 the Kleinfelder NBIS Bridge Inspection Team conducted an in-depth, comprehensive visual inspection of the Spring Lake Dam Pedestrian Walkway in the Ozark-St.

Francis National Forest, Belleville, Yell County, Arkansas. The United States Forest Service

(USFS) manages the forest on behalf of the United States Department of Agriculture (USDA).

The Spring Lake Dam Pedestrian Walkway is located on the south end of Spring Lake. The

Pedestrian Walkway is a 15 span pedestrian bridge supported by stone and mortar piers which are attached to the top of the Spring Lake Dam. Because of the bridge pier’s location on the spillway part of the dam, only the upstream side of the piers, upstream exterior beams and underside of the deck were accessible by boat, which was supplied by the Forest Service. The entire topside area of the walkway was visually inspected at National Bridge Inspection Standards

(NBIS) meaning all components were viewed close enough to touch and were sounded with a hammer.

Upstream access to bridge

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2 GENERAL REMARKS & GENERAL CONDITION

The Spring Lake Dam Walkway is oriented east-west. For the purpose of this inspection the spans and piers and were numbered one through fifteen from east to west. The deck consists of three sections (labeled A,B,C from east to west) which are supported by two exterior concrete beams which are embedded into the stone piers. A steel railing is embedded in the stone and motar risers that are supported on each end of the piers. The walkway also supports a small waterline which lays on the upstream side of the deck.

Substructure: The overall substructure is in Fair Condition with no evidence of major movement or settling. Minor mortar cracking and movement noted at stress points caused by the railing risers.

Minor staining and efflorescent appears to be coming from the mortar between the stones.

Typical Span

(Stone & mortar piers, concrete exterior beams, concrete deck, stone & mortar risers with steel hand rail)

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Deck/Superstructure: The overall superstucture is in Poor Condition with concrete scaling, cracking, leaking and delamination noted in most spans. Some spans have severe spalling and holes through the deck. Said areas have steel plates on the walkway to accomodate pedestrians.

A majority of the exterior beams are in good condition, however a few beams show signs of cracking and efflorescent staining.

Pedestrian Railing: The overall railing is in Good Condition with minor surface rust along the entire length.

3 INSPECTION NOTES

East Abutment: Concrete wearing surface has minor scaling and delamination (Picture 3).

Downstream return wing has severe efflorescent staining at mortared joints (Picture 5). Breast wall has severe staining from concrete diaphragm (Picture 4).

Span 1: On the topside of the deck, minor scaling and small areas of delamination. On the underside of the deck leaking and minor staining visible between sections.

Pier 1: Severe scaling and delamination on the top of pier (Picture 6). Slight cracking and efflorescent staining at mortar joints.

Span 2: On the topside of the deck, minor scaling and small areas of delamination. On the

Pier 2: Minor scaling and delamination on the top of pier. Slight cracking and efflorescent staining at mortar joints.

Span 3: On the topside of the deck, minor scaling and small areas of delamination. On the

Pier 3: Slight cracking and efflorescent staining at mortar joints. Severe scaling and delamination on the top of pier.

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Span 4: On the topside of the deck, minor scaling and small areas of delamination. On the

Pier 4: Slight cracking and efflorescent staining at mortar joints. Minor scaling and delamination on top of pier (Picture 9).

Span 5: On the topside of the deck, minor scaling and small areas of delamination. On the underside of the deck leaking and minor staining visible between sections. Full length transverse crack in underside of deck in Section C (Picture 10).

Pier 5: Slight cracking and efflorescent staining at mortar joints. Minor scaling and delamination on top of pier.

Span 6: On the topside of the deck, minor scaling and small areas of delamination. On the

Pier 6: Upstream riser has lift mechanism. (See Picture 11 & 12) Downstream riser severely cracked (Picture 13).

Span 7: On the topside of the deck, minor scaling and small areas of delamination with steel plate

Section B (Picture 14). On the underside of the deck leaking and minor staining visible between sections.

Pier 7: Minor scaling and delamination on top of pier. Slight cracking and efflorescent staining at mortar joints.

Span 8: Heavy scaling and delamination in topside of deck (See Picture 15) Steel plate Section

B (See Picture 16). On the underside of the deck, Section B has severe cracking, leaking and staining.

Pier 8: Slight cracking and efflorescent staining at mortar joints. Minor scaling and delamination

Span 9: Heavy scaling and delamination in topside of deck Section C. Heavy cracking and efflorescent staining of deck Section C (See Picture 18).

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Pier 9: Long vertical crack upstream end of pier propagating from riser-exterior beam interface extending down through five stone courses (See Picture 19). Slight cracking and efflorescent staining at other mortar joints.

Span 10: Upstream and downstream exterior beams have cracking and severe efflorescent leaking and staining (Picture 20 & 21). Section B has severe cracking staining in underside of deck.

Section C has large hole, severe cracking and staining. (See Picture 21 & 22 ) Steel plate over

Section C (See Picture 23).

Pier 10: Slight cracking and efflorescent staining at mortar joints. Minor scaling and delamination

Span 11: On the topside of the deck, minor scaling and small areas of delamination. Section C has severe cracking staining in underside of deck. Steel plate over Section C.

Pier 11: Slight cracking and efflorescent staining at mortar joints. Minor scaling and delamination

Span 12: Heavy scaling and delamination in topside of deck Section A.

Pier 12: East side of the pier has horizontal crack between the second and third stone course

(See Picture 25). Slight cracking and heavy efflorescent staining at mortar joints. Full length horizontal crack upstream end at pier-riser interface.(See Picture 26). Slight cracking and efflorescent staining at other mortar joints.

Span 13: On the topside of the deck, minor scaling and small areas of delamination. On the

Pier 13: East side of the pier has horizontal crack between the sixth and seventh stone course.

Slight cracking and heavy efflorescent staining at mortar joints. Minimal scaling and delamination

Span 14: On the topside of the deck, minor scaling and small areas of delamination. On the

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Pier 14: East side of the pier has horizontal crack between the third, forth and fith stone course.

(See Picture 27). Slight cracking and heavy efflorescent staining at mortar joints. Severe efflorescent staining on downstream end of pier.

Span 15: Has a 6”-8” depth overlay patch over the entire span topside. (See Picture 28 & 29).

Section A is completely failed with the stay in place forms visible (See Picture 30 & 31). Both ends of the upstream exterior beam have heavy cracking and efflorescent leaking and staining (Picture

32).

West Abutment: Concrete wearing surface has heavy scaling and delamination (Picture 35).

Downstream return wing has severe efflorescent staining at mortared joints. Breast wall has severe staining from concrete diaphragm (Picture 33).

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4 PICTURES

Picture 1 Upstream View

Picture 2 Downstream View

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Picture 3 Top of East Abutment

Picture 4 Upstream side East Abutment

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Picture 5 Downstream side East Abutment

Picture 6 Top Pier 1 (note scaling and delamination)

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Picture 7 East side Pier 3 (note typical efflorescent at mortar joints)

Picture 8 West Side Pier 4 (note typical efflorescent staining from concrete diaphragm)

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Picture 9 Top Pier 4 (note heavy scaling and delamination)

Picture 10 Span 5 Full length transverse crack Section C

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Picture 11 Pier 6 Upstream Riser has lift mechanism

Picture 12 Pier 6 Gate hardware upstream end of pier

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Picture 13 Pier 6 (note cracking in downstream end)

Picture 14 Span 7 Steel plate Section B

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Picture 15 Span 8 (note heavy scaling and delamination)

Picture 16 Span 8 steel plate Section B

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Picture 17 Underside Span 8 Section B

Picture 18 Underside Span 9 Section C

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Picture 19 Crack in Upstream end of Pier 9

Picture 20 Severe cracking and efflorescent exterior downstream beam Span 10

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Picture 21 Severe cracking and efflorescent exterior downstream beam Span 10

Picture 22 Span 10 Section B & C have extreme cracking, staining, hole

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Picture 23 Span 10 Section C Steel plate

Picture 24 Span 11 Section C

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Picture 25 East side of Pier 12

Picture 26 Pier 12 (Note horizontal crack at pier – riser)

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Picture 27 East side of Pier 14

Picture 28 Span 15 Looking west full length patch

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Picture 29 Span 15 Looking east full length patch

Picture 30 Span 15 underside of large patch cracking and efflorescent in exterior beams

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Picture 31 Close up of patch Span 15

Picture 32 Span 15 Upstream exterior beam

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Picture 33 West Abutment Breast wall

Picture 34 West Abutment (upstream return wing)

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Picture 35 Top of west abutment heavy scaling

Picture 36 West Approach (looking east)

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Picture 35 Top of west abutment heavy scaling

Picture 36 West Approach (looking east)