Department of Transportation Office of Project Development 700 E Broadway Avenue Pierre, South Dakota 57501-2586 605/773-3268 FAX: 605/773-2614

August 23, 2019 ADDENDUM NO. 1

RE: Item #1, September 4, 2019 Letting - P-PH 0046(47)356, PCN 025D, Clay, Lincoln County - Grading, Shoulder Widening, Structures (197'-6" Cont Conc Bridge & 3 RCBCs), & Interim Surfacing

TO WHOM IT MAY CONCERN: The following addenda to the plans shall be inserted and made a part of your proposal for the referenced project. SPECIAL PROVISIONS: NO CHANGE

SDEBS BID PROPOSAL: The electronic bid proposal for this contract has been revised to include the

changes associated with this addendum. Bidders must log in to the SDEBS to retrieve and incorporate these changes into their bid.

Quantities for Bid Items were changed: Bid Item 634E0330 “Temporary Raised Pavement Markers” changed from

3,120 to 14,746 Ft Bid Item 634E0600 ““4” Temporary Pavement Marking Tape Type 1” changed from

144 to 1,728 Ft Bid Items were removed: Bid Item 634E0630 for “Temporary Pavement Marking”

PLANS: Please destroy sheets A1, C2, and C3 and replace with the enclosed sheets, dated 8/19/19.

Sheets A2 & C2: Quantities for Bid Item 634E0330 “Temporary Raised Pavement Markers” changed from 3,120 to 14,746 Ft and Bid Item 634E0600 ““4” Temporary Pavement Marking Tape Type 1” changed from 144 to 1,728 Ft Bid Item 634E0630 for “Temporary Pavement Marking” was removed

Sheet C3: TEMPORARY RAISED PAVEMENT MARKERS note and note spacing was revised.

Sincerely, Sam Weisgram Engineering Supervisor SW/cj CC: Craig Smith, Mitchell Region Engineer Rod Gall, Yankton Area Engineer

Connecting South Dakota and the Nation

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P-PH 0046(47)356

ESTIMATE OF QUANTITIES AND ENVIRONMENTAL COMMITMENTS

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Plotting Date: 08/19/2019 Revised: 08/19/2019 BTR

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SECTION C – ESTIMATE OF QUANTITIES

SEQUENCE OF OPERATIONS The Contractor will follow the following Sequence of Operations unless an alternate Sequence of Operations is submitted in writing two weeks prior to the pre-construction meeting and approved by the Engineer prior to the start of work. 1. The project will be separated into two sections for the purpose of

sequencing.

• Station 11+60 to 75+00 (shoulder widening and grading) will be referred to as Section 1.

• Station 75+00 to Sta. 442+84 (shoulder widening only) will be referred to as Section 2.

2. The two sections will be treated separately, however, the Contractor will be

allowed to work in both sections simultaneously. 3. Shoulder widening operations in Section 2 will be limited to 2 miles in

length. Local traffic will be maintained through these sections with use of flagger stations and pilot car as directed by the Engineer.

4. Mail service and emergency vehicle access will be maintained at all times.

5. When work begins on the project, the Contractor will be responsible for maintaining the entire project. This will include, but is not limited to, all surface maintenance, drainage, weed control and traffic signs.

SEQUENCE OF OPERATIONS cont.:

Section 1 Sequencing

1. Install fixed location signing and traffic control measures (Including Detour Signing. If the Contractor elects to begin the structure work in the winter of 2019-2020 or while spring load limits are in effect on county road detour, the Winter Structure Detour will be used.)

2. Remove and replace Continuous Concrete Bridge at Sta. 25+06. 3. Remove and replace Quad CM Pipe with Box Culvert at Sta. 57+67. 4. Complete shoulder widening operations from Sta. 11+60 to Sta.

22+50. 5. Remove existing surfacing/granular material and complete grading

operations from Sta. 22+50 to Sta. 75+00. 6. Place base course and asphalt concrete 7. Install permanent pavement markings in grading sections. 8. Install all applicable permanent signing. 9. Remove all temporary traffic control devices and open section to

traffic. Section 2 Sequencing

1. Install fixed location signing and traffic control measures. 2. Complete shoulder widening operations. 3. Install stream and traffic diversions for the box culvert replacements at

Sta. 332+90 and Sta. 363+26. 4. Construct box culverts at Sta. 332+90 and Sta. 363+26 5. Install permanent signing and pavement marking. 6. Remove all temporary traffic control devices.

Shoulder widening operation shall be limited to 2 miles in length. Local traffic shall be maintained through these sections with use of flagger stations and pilot car as directed by the Engineer. The Contractor will not be allowed to work on the shoulders on opposite sides of the roadway at the same time and vertical drop-off on both sides of the roadway will not be allowed. At no time during the salvaging, grading and base course laydown operations shall a vertical drop-off be left overnight adjacent to the traveled way. The Contractor shall utilize embankment and/or granular material to ensure there is no vertical drop-off. The slope of the embankment and/or granular material shall not exceed a 3:1 within 20’ of the traveled way. The Contractor shall provide the 3:1 inslope adjacent to the traveled way, both during periods of inactivity and at night. No separate payment will be made for providing the 3:1 inslopes Prior to opening a lane of traffic, drop-offs on the shoulder shall be marked with signs and delineated with drums, 42” cones, or vertical panels at a maximum of 100’ spacing. Drums or 42” cones will only be allowed when they will meet the minimum height requirements in the MUTCD of 28” above the driving surface. When the vertical drop-off prevents the minimum 28” height requirement, vertical panels shall be placed on the edge of the driving surface. The Contractor shall have sufficient quantity of vertical panels on site to mark drop-offs in the event of an emergency, or weather delays the resumption of work. Payment for signs shall be at the contract unit price for Traffic Control per square foot. The cost for the drums, 42” cones and vertical panels shall be incidental to the contract lump sum price for Traffic Control, Miscellaneous. The Contractor will restore traffic to one lane each direction at the end of the day, prior to nightfall. Prior to opening the roadway to traffic the Contractor shall clean the roadway surface each day.

MAINTENANCE OF TRAFFIC Existing STOP signs that are temporarily removed will be reset prior to the end of each day’s work. A stop sign on portable supports must be used whenever a permanent ground mounted stop sign is removed. Cost for this work will be incidental to the contract unit price per square foot for Traffic Control Signs. Throughout the project, the Contractor must maintain local traffic, access to businesses and residences at all times. Adequate passage and ramping will be provided. The Contractor will keep businesses and residents informed of construction sequences in areas which have a direct effect on their access. 500 tons of Base Course have been provided for traffic control purposes to maintain traffic during construction. When directed by the Engineer, the Base Course will be salvaged and reused during various phases of construction. Cost for removal, disposal and/or reuse of this material will be incidental to the contract unit price per ton for Base Course. A mobile work operation will be allowed provided the pavement marking can be completed satisfactorily by a continuously moving work operation. A mobile work operation will require approval by the Engineer. Cost for a mobile workspace will be incidental to the contract lump sum price for Traffic Control, Miscellaneous. All existing regulatory and warning signs shall be maintained until final permanent signing is placed. Signs removed for construction operations shall be placed on temporary supports until the time when they can be reinstalled except within the pilot car zone while flaggers are present. Payment for this work shall be included in Traffic Control. Miscellaneous. All temporary speed limit signs will have a minimum mounting height of 5 feet in rural locations, even when mounted on portable supports. Portable sign supports will not be located on sidewalks, bicycle facilities, or other areas designated for pedestrian or bicycle traffic. Sufficient traffic control devices have been included in these plans to sign one work space of each type. If the contractor elects to work on additional sites simultaneously, the cost for additional traffic control devices shall be incidental to contract price per square foot for Traffic Control Signs. BRIDGE & BOX CULVERT TRAFFIC CONTROL There is a total of 3 locations where reinforced concrete box culverts (RCBC) and 1 location where a continuous concrete bridge will be installed on the project. For work at Sta. 332+90 (Str. No. 42-039-290) and Sta. 363+26 (Str. No. 42-045-290) the RCBCs will be built using staged construction to maintain traffic through all phases. The use of inslope shoring may be required next to the roadway due to depth of cut. The cost of this treatment will be incidental to the various contract items for the RCBC. For work at Sta. 26+05 (Str. No. 14-102-000) and Sta. 56+67 (Str. No. 14-107-000) the roadway will be closed to traffic.

P-PH 0046(47)356 C2 C15

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Revised 8-19-19 JRS

PIPE CULVERT INSTALLATION TRAFFIC CONTROL Pipe culvert installations in shoulder widening areas will be installed one-half of the roadway at a time and local traffic will be maintained either with stop signs or flaggers as directed by the Engineer. These areas will have base course placed at a thickness as directed by the Engineer after installation to maintain local traffic. Pipe culvert installations inside areas where the roadway is closed (Section 1), the culverts may be installed in one phase with the road closed. INCIDENTS An incident is an emergency road user occurrence or unplanned event that impedes the flow of traffic such as an accident, hazardous materials spill or similar event. The Contractor will set up a meeting prior to start of work to plan and coordinate the response to an incident. The Contractor will invite the Department of Transportation, the South Dakota Highway Patrol and local emergency response entities to the meeting. The Contractor will be required to flag traffic, relocate signs, and adjust traffic control devices as required to warn approaching motorists of the incident and resulting queued traffic. The Contractor will provide adequate personnel to accomplish the necessary traffic control work in the event of an incident. Flagging for incidents will be paid for at contract unit price per hour. No additional payment will be made for the other work. Costs for necessary signing will be incidental to the contract unit price per square foot for Traffic Control Signs. TEMPORARY RAISED PAVEMENT MARKERS Temporary Raised Pavement Markers will be used as temporary pavement marking at the locations shown in the table below. The temporary raised pavement markers will be attached to the roadway surface with a bituminous adhesive capable of being removed from the roadway. Cost for furnishing, installing, maintaining (including cleaning and replacing, if necessary), removing markers and bituminous adhesive will be included in the contract unit price per foot for Temporary Raised Pavement Markers.

Location Length (Ft) Table of Asphalt Concrete Pavement Removal (Sheet B7): after final surfacing 626 Box Culvert traffic control – Sta 332+90 460 Box Culvert traffic control – Sta 363+26 460 Pipe replacement traffic control as per Standard Plate 634.25: 12 locations 13200 __________ Total: 14746

REMOVE PAVEMENT MARKING Existing pavement marking that conflicts with the desired traffic patterns detailed in traffic control layouts in the plans will be removed by the Contractor unless otherwise shown. Removal of pavement marking will be paid for at the contract unit price per foot for Remove Pavement Marking, 4” or Equivalent. SHEETING FOR TRAFFIC CONTROL SIGNS All fluorescent orange background material on traffic control signs, all temporary delineators, and all temporary STOP (R1-1), YIELD (R1-2), DO NOT ENTER (R5-1), and WRONG WAY (R5-1a) signs shall conform to the requirements of ASTM D4956 Type IX or XI. All other traffic control signs and background colors shall conform to the requirements of ASTM D4956 Type IV. TEMPORARY WIDENING – BOX CULVERT TRAFFIC DIVERSION The temporary widening typical section for the construction of the box culverts at Sta. 322+90 and Sta. 363+26 will consist of 2 lanes with a top surfaced width of 12’ per lane or greater and a 4:1 inslope. Surfacing will consist of 6” (2 – 3” lifts) of Base Course and a 3” lift of Asphalt Concrete Composite. An estimated 8022 cubic yards of Contractor Furnished Borrow Excavation will be needed to construct one side of the temporary widening at both sites (4011 per site). The material will be obtained by the Contractor. This material will need to be removed and replaced on the other side of the roadway for construction of the second half of the box culverts. The cost to furnish, install, remove and replaced on the other sides and disposing of the material will be included in the contract unit price per cubic yard for Contractor Furnished Borrow Excavation. Plans quantity will be the basis of payment unless changes are ordered by the Engineer An estimated 2333 tons of Base Course and 1295 tons of Asphalt Concrete Composite will be needed to construct all the temporary widening for construction of the box culverts at Sta. 332+90 and Sta. 363+26. The cost to remove and dispose of the material will be incidental to unit price per ton for the respective contract items. TRAFFIC CONTROL MOVABLE CONCRETE BARRIER Traffic Control Barriers will be supplied by the Department, for use on this project. The Department maintains ownership of the barriers. The Traffic Control Barriers are located at the Sioux Falls Area Office at 5316 W 60th St N, Sioux Falls. To arrange pick up, contact Sioux Falls Area Engineering Supervisor at the Sioux Falls Area Office at (605)367-5680 ext. 2103. The cost for pick-up, setting, moving to other side, hauling and stockpiling the concrete barriers back to the Sioux Fall Area Office is included in the contract unit price per each for Traffic Control Temporary Concrete Barrier. CONCRETE BARRIER END PROTECTION Documentation on the crash cushion, which includes the drawing details of the crash cushion, details for the transition to the traffic control barrier, and details for the concrete anchoring pad, will be provided to the Project Engineer at the pre-construction meeting. The crash cushion will be attached to the traffic control barrier with a transition that meets test level 3 requirements of NCHRP 350 or MASH. The Contractor will certify that the crash cushion was installed according to the manufacturer’s installation instructions.

CONCRETE BARRIER END PROTECTION cont.: All costs for furnishing and installing the crash cushion including the anchoring pad, anchors for connection to the pad, transitions to the concrete barrier, material, labor, equipment, and incidental items will be paid for at the contract unit price per each for Temporary Concrete Barrier End Protection. The Contractor shall have replacement hardware available so that, in the event that an attenuator is hit and made unusable, the attenuator can be made functional within 24 hours. The cost of replacement is included in the contract unit price per each for Temporary Concrete Barrier End Module Set or Repair Kit. No payment will be made for the Concrete Barrier End Module Set or Repair Kit in the event that no repairs are necessary. Upon completion of the project, crash attenuators shall remain the property of the Contractor. BARRIER MOUNTED LINEAR DELINEATION SYSTEM PANELS In the event the linear delineation system (LDS) panels need replacement, the following notes will apply for the replacement of the LDS. A linear delineation system panel shall be attached to each barrier section. The color shall be the same as the nearest pavement marking, white along outside edgelines or yellow for the left side on one way traffic sections. The LDS shall be 34 inches long and 6 inches in height and be constructed of aluminum formed into a shape to provide retroreflective properties across a wide range of angles. It shall be sheeted with sheeting meeting the requirements of ASTM D4956 Type XI. The panels shall be evenly spaced, with the top of the panel 4 inches below the top of the barrier. Installation shall be as per the manufacturer’s recommendations. This will allow for easy removal for replacement of damaged panels or to replace with an alternate color. The Contractor shall furnish and install one panel along each side of the barrier if any panels are missing from the barriers. Replacement of damaged linear delineation system panels shall be furnished and replaced by the Contractor. All costs associated with furnishing, installing, and replacing if needed the LDS shall be incidental to the contract unit price per each for Linear Delineation System Panel, Barrier Mounted. All LDS panels shall remain attached to the barrier sections and shall become the property of the State of South Dakota upon completion of the project. The Contractor shall verify the number of LDS panels that will need to be installed or replaced on the Traffic Control Movable Concrete Barriers. The contract amount of LDS panels is an estimate and the full contract amount may not be needed. Maintaining the linear delineation system, including moving LDS panels from one side of the barrier to the other side of the barrier to match the applicable color of the nearest pavement marking shall be incidental to the contract lump sum price for Traffic Control, Miscellaneous. Cost for replacing LDS panels will be included in the contract unit price per each for Linear Delineation System Panel, Barrier Mounted.

EXISTING MAILBOXES AND NEWSPAPER CONTAINERS The Contractor will be required to relocate on temporary supports existing mailboxes and newspaper containers affected by the project as necessary in order to provide continuous mail service to the local residents and businesses throughout the project. It is anticipated that the Contractor will be required to relocate these mailboxes at least twice during construction. All mailboxes will be located at a location acceptable to the Postmaster. The Engineer will approve the material used for temporary supports. Cost of this work will be incidental to various contract items.

P-PH 0046(47)356 C3 C15

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Revised 8-19-19 JRS