PROJECT ANNOUNCEMENT · 2020-07-01 · State of Tennessee Real Estate Asset Management (STREAM)...

State of Tennessee Real Estate Asset Management (STREAM)William R. Snodgrass Tennessee Tower, 24th Floor • 312 Rosa L. Parks Blvd. • Nashville, TN 37243

DSP-0402OCI of 1 Revised: 12/2018

PROJECT ANNOUNCEMENT

Post Date: 07.01.2020Submittal Deadline: 07.31.2020

Project Title: Martha Sundquist State Forest Bridge ReplacementsFacility Name: Division of ForestryCity: Statewide County: StatewideSBC Project No.: Agency: DEPARTMENT OF AGRICULTUREMaximum Allowable Construction Cost (MACC): $458,112.00Development Manager: Pour, MelodieAgency Representative: Maholland, Andrea

Project Description:Replacement of three stream crossing structures and all required related work.

Additional information about the project can be found in the project’s program document included as a part of this announcement.

Special Design or Submission Requirements: N/A

Note: All information previously made available to consultants, by the State, and all information supplied by consultants to the State, relating to the subject project, will be made available to any potential respondents. Potential respondents desiring to review these documents can submit a request to [email protected].

Anticipated SBC Approval Date: 08.13.2020Anticipated ESC Designer Selection Date: 08.24.2020Anticipated Designer NTP Date: 12.18.2020Anticipated Project Bid Date: 12.17.2021

mailto:[email protected]

Martha Sundquist State Forest Bridge ReplacementsPhase 3: Program DocumentSBC# 529/000-08-2012

August 30, 2019

Martha Sundquist State ForestBridge Replacements

SBC Project #: 529/000-08-2012Task Authorization #: 21-026-N

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Quality informationPrepared by Checked by Approved by

Miranda Mangahas John Crosslin, PE Brian Hall, PE, CPESC

Revision HistoryRevision Revision date Details Authorized Name Position

Distribution List# Hard Copies PDF Required Association / Company Name



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Prepared for:

Tennessee Department of General ServicesReal Estate Asset Management (STREAM)Tennessee Tower, 24th Floor312 Rosa Parks AvenueNashville, Tennessee 37243

Prepared by:

AECOM1000 Corporate Centre DriveSuite 250Franklin TN, 37067aecom.com615-771-2480

Copyright © 2019 by AECOM

All rights reserved. No part of this copyrighted work may be reproduced, distributed, or transmitted in any form or by any means without the prior written permission of AECOM.



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Table of Contents1. Executive Summary ..................................................................................................................................... 5

1.1 Site Description ................................................................................................................................. 51.2 Methodology ..................................................................................................................................... 7

2. Detailed Program Information ....................................................................................................................... 72.1 Bridge 1 – Over Moss Creek .............................................................................................................. 82.1.1 Existing Conditions ............................................................................................................................ 82.1.2 Recommendations ............................................................................................................................ 82.2 Bridge 2 – Over Sowbed Gap Creek .................................................................................................. 82.2.1 Existing Conditions ............................................................................................................................ 82.2.2 Recommendations ............................................................................................................................ 92.3 Bridge 3 – Over Branch Creek ........................................................................................................... 92.3.1 Existing Conditions ............................................................................................................................ 92.3.2 Recommendations ............................................................................................................................ 9

3. Opinion of Probable Construction Costs ...................................................................................................... 104. Conclusions and Summary ......................................................................................................................... 10Appendix A – Photograph Log .............................................................................................................................. A-1Appendix B – Opinion of Probable Construction Costs (OPCC) ............................................................................. B-1Appendix C – TDOT Bridge Condition Coding Forms ............................................................................................ C-1

FiguresFigure 1: Overview Map .......................................................................................................................................... 6Figure 2: Bridge Replacement Location Map............................................................................................................ 6Figure 3: Proposed Replacement Structure Type ..................................................................................................... 7



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1. Executive SummaryThrough the State of Tennessee Real Estate Asset Management (STREAM), AECOM has beencontracted to analyze the Martha Sundquist State Forest (SF) regarding replacement of threeexisting stream crossing structures. A site visit and kick-off meeting were conducted on July 9,2019 to verify existing conditions and confirm information related to the Statement of Need. Stateof Tennessee Division of Forestry employees Darren Bailey, Shawn Hendrickson, JohnHenderson, and Jordan Self were on hand to discuss the desired bridge replacements. Thecrossing structures and respective streams are as follows:

· Bridge 1 – Over Moss Creek

· Bridge 2 – Over Sowbed Creek

· Bridge 3 – Over Branch Creek

Sections 2 provides details of the program information regarding to each bridge. Section 3provides a short narrative of the Opinion of Probable Construction Costs (OPCC), however adetailed outline is attached in Appendix C.

1.1 Site Description

This tract of land was purchased in 2001 from International Paper Company (formerly ChampionInternational Corporation), who owned the property since about 1930. The tract of land isapproximately 2001 acres in size. Prior to that it belonged to the Lambs Gulf Company and is nowthe property known as the “Gulf”. It is the only forest that resides in the Blue Ridge province. It islocated in eastern Tennessee, in Cocke County near the North Carolina-Tennessee border. It is70 miles east of Knoxville. The Martha Sundquist SF “Gulf Tract” is surrounded by the CherokeeNational Forest on three sides and consists of one drainage system. The Forest is composed ofmature mountain and cove hardwoods. A harvest rotation schedule was developed and followedclosely by the previous owners and large streamside management zones, some as large as 80acres, have been established. This tract is considered a wildlife management area and hasspecial provisions for bear hunting. It will be used primarily for recreation, hunting, fishing, timberproduction, and demonstration. An overview map of the Martha Sundquist SF is provided in Figure1. Figure 2 shows the locations of the bridges to be replaced.



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Figure 1. Overview Map

Figure 2. Bridge Replacement Location Map

Bridge 1 Bridge 2

Bridge 3



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1.2 Methodology

Four primary steps were taken to analyze each location and propose replacement stream crossing structures. The steps are as follows:

1. Preliminary Site Investigation

a. Review the provided TDOT Bridge Condition Coding Form for each structure dating April 2, 2018 (see Appendix A).

2. Site Visit

a. Confirm aspects of the sites to be analyzed and note any additional requests.

b. Determine existing conditions including inventory, measurements, and utilization.

c. Photograph aspects of sites to be reviewed and referenced in report (see Appendix B).

3. Develop Corrective Recommendations

a. Provide corrective recommendations for replacement of each stream crossing structure.

b. Develop an Opinion of Probable Construction Costs (OPCC) to implement corrective recommendations (see Appendix C).

4. Report Findings

2. Detailed Program InformationFor each stream crossing structure, the extent of replacement will require super-structure and foundation replacement. On the July 9, 2019 site visit, the Tennessee Division of Forestry indicated that their desired replacement structures for all three stream crossings would utilize steel “box culvert” style pre-fabricated structures as manufactured by Big R Bridge (see Figure 3). Sections 2.1 through 2.3 provide an outline of existing conditions followed by the respective recommendations for each bridge replacement.

Figure 3. Proposed Replacement Structure Type

Span

Cover

Ground Line



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2.1 Bridge 1 – Over Moss Creek

2.1.1 Existing Conditions

· Existing length = 17’-6”

· Existing width = 13’-4”

· The distance from the stream bottom to the top of deck on the upstream side is 6’-11”

· The distance from the stream bottom to the top of deck on the downstream side is 7’-6”

· The existing deck is 1’-9” thick

· If the bridge is widened, it is desirable to widen to the North.

· In April of 2019, the bridge deck boards were replaced due to poor condition.

· The TN Division of Forestry suggested that re-grading the roadway to make the bridgedeck higher might help to increase the hydraulic opening if the steel arch structures areused.

2.1.2 Recommendations

The minimum dimensions for the proposed structure are as follows:

· Cover = 1’-6”

· Height of structure above stream bottom = 6’-11”. The structure height may need to beadjusted to accommodate the permissible dimensions of the desired structure type.

· Span length = 20’-6”A hydraulic model of the existing and proposed bridges was produced in order to determine thehydraulic capacity of the structures. Approximate elevations were determined based on publicLIDAR data provided by the state of Tennessee, bridge dimensions were taken from bridgeinspection reports, and rough channel dimensions from field visit measurements. The modelindicates that the proposed bridge will pass a 500-year storm event of 576 cfs with 0.8’ offreeboard.

2.2 Bridge 2 – Over Sowbed Gap Creek






· The existing deck is 1’-6” thick

· There are plans to replace the deck boards in the near future due to their poor existingcondition.

· It might be desirable to lengthen the proposed structure by approximately 3 ft toaccommodate road curvature.



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· Cover = 1’-6”


· Span length = 18’-3”A hydraulic model of the existing and proposed bridges was produced in order to determine thehydraulic capacity of the structures. Approximate elevations were determined based on publicLIDAR data provided by the state of Tennessee, bridge dimensions were taken from bridgeinspection reports, and rough channel dimensions from field visit measurements. The modelindicates that the proposed bridge will pass a 25-year storm event of 566 cfs with 1.0’ offreeboard.

2.3 Bridge 3 – Over Branch Creek






· The existing deck is 1’-8” thick.

· If the bridge is widened, it is desirable to widen to the North.

· There are plans to replace the deck boards in the near future due to their poor existingcondition.

· The existing structure utilizes wood wing walls to shorten the bridge by approximately12 ft. Because of this, it might be desirable to lengthen the proposed bridges toeliminate the usage of wingwalls.



· Cover = 1’-6”


· Span length = 18’-10A hydraulic model of the existing and proposed bridges was produced in order to determine thehydraulic capacity of the structures. Approximate elevations were determined based on publicLIDAR data provided by the state of Tennessee, bridge dimensions were taken from bridgeinspection reports, and rough channel dimensions from field visit measurements. The modelindicates that the proposed bridge will pass a 100-year storm event of 658 cfs with 0.1’ offreeboard.



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3. Opinion of Probable Construction CostsThe total Opinion of Probable Construction Cost for the proposed replacement stream crossingstructures is $218,093. This figure includes estimates for general conditions, permitting, insuranceand escalation, as well as construction and design contingencies. See Appendix C for a completebreakdown of the OPCC.

4. Conclusions and SummaryThree stream crossing structures within the Martha Sundquist State Forest are in poor conditionas determined by a TDOT bridge inspection from April 2, 2018. The proposed Bridge ReplacementProject resolves this issue by providing specifications for pre-fabricated “box culvert” stylestructures to replace the existing structures.



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Appendix A – Photograph Log

Martha Sundquist State Forest Bridge Replacements

SBC Project #: 529/000-08-2012

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All photographs were taken on July 9, 2019 unless noted otherwise.

Photograph 1

Note: Bridge 1: Timber Deck with Minor Debris

Photograph 2 Note: Bridge 1: Looking Upstream


SBC Project #: 529/000-08-2012

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Photograph 3 Note: Bridge 1: Looking Downstream

Photograph 4

Note: Bridge 1: West Approach


SBC Project #: 529/000-08-2012

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Photograph 5

Note: Bridge 1: North Elevation

Photograph 6

Note: Bridge 1: North Elevation


SBC Project #: 529/000-08-2012

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Photograph 7

Note: Bridge 1: West Abutment

Photograph 8 Note: Bridge 1: East Abutment with Damage to Timber


SBC Project #: 529/000-08-2012

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Photograph 9

Note: Bridge 1: Stream Under Bridge

Photograph 10

Note: Bridge 2: Timber Deck with Heavy Gravel and Vegetation on Surface


SBC Project #: 529/000-08-2012

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Photograph 11

Note: Bridge 2: Timber Deck with Split Planks, Holes, and Heavy Debris

Photograph 12 Note: Bridge 2: Hole in Timber Deck


SBC Project #: 529/000-08-2012

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Photograph 14 Note: Bridge 2: Looking Downstream


SBC Project #: 529/000-08-2012

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Photograph 15

Note: Bridge 2: North Elevation, East Timber Abutment, and Stream Under Bridge

Photograph 16

Note: Bridge 3: Timber Deck with Gravel and Vegetation on Surface


SBC Project #: 529/000-08-2012

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Photograph 17 Note: Bridge 3: Timber Deck



SBC Project #: 529/000-08-2012

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Photograph 19

Note: Bridge 3: Looking Upstream

Photograph 20

Note: Bridge 3: Looking Downstream


SBC Project #: 529/000-08-2012

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Photograph 21

Note: Bridge 3: Downstream Embankments

Photograph 22

Note: Bridge 3: Stream Under Bridge looking from Upstream East Embankment


SBC Project #: 529/000-08-2012

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Photograph 23

Note: Bridge 3: Stream Under Bridge looking from Upstream West Embankment

Photograph 24

Note: Downstream Wingwall on West Timber Abutment


SBC Project #: 529/000-08-2012

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Photograph 25

Note: Bridge 3: Upstream Wingwall on East Abutment with Damage to Timber



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Appendix B – Opinion of Probable Construction Costs (OPCC)



Estimate AmountDivision 1 General Requirements 14,603$Division 2 Existing Conditions 45,000$Division 3 Concrete 16,305$Division 5 Metals 83,000$Division 31 Earthwork 53,250$

212,158$21,216$

2,122$8,486$

42,432$21,216$12,729$

108,200$

320,358$

Martha Sundquist State Forest

Opinion of Probable Construction Costs - Division Summary

Divisional Breakdown

Subtotal Direct Cost of Work

Subtotal Soft Costs

Total Construction Cost

General Conditions (10%)Permitting (1%)Insurance (4%)Construction Contingency (20%)Design Contingency (10%)Escalation (6%-2020)

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Bridge Replacements

No costs have been included related to phasing, temporary camper access, etc.

Division Description Quantity Unit Unit Price Subtotal TOTAL

Bridge Replacements

Bridge 1 – Over Moss Creek $66,295

1 Temporary Seeding and Straw 1 AC $1,500 $1,5005 Arch Rib 1 LS $26,500 $26,5003 Concrete 6 CY $850 $5,1003 Rebar 268 LB $1.25 $335

31 Earthwork 1 LS $15,000 $15,0002 Removal of Existing Structure 1 LS $15,000 $15,000

31 Granular Backfill 52 TON $55 $2,860

Subtotal $66,295

Bridge 2 – Over Sowbed Gap Creek $65,800




Subtotal $65,800

Bridge 3 – Over Branch Creek $69,960




Subtotal $69,960

Additional Construction Costs $10,103

1 Mobilization (5%) 1 EA $10,103 $10,103

Subtotal $10,103

$212,158

based upon the assumption that the road will be closed during construction.Programmatic Level - Detailed Opinion of Probable Construction Costs in 2019 Dollars

Martha Sundquist State Forest

Project Total

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AECOM C-1

Appendix C – TDOT Bridge Condition Coding Forms

PROJECT ANNOUNCEMENT · 2020-07-01 · State of Tennessee Real Estate Asset Management (STREAM)...

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