Exhibit_A1_Quadriga_Assessment_2023_final.pdf

C O N D I T I O N A S S E S S M E N T O F “ T H E P R O G R E S S O F T H E S T A T E ” /

Q U A D R I G A A T T H E M I N N E S O T A S T A T E C A P I T O L

D E C E M B E R 2 1 , 2 0 2 3

PREPARED BY

MACDONALD & MACK ARCHITECTS

MIDWEST ART CONSERVATION CENTER

MATTSON MACDONALD YOUNG STRUCTURAL ENGINEERS

MacDonald & Mack Architects

Midwest Art Conservation Center

Mattson Macdonald Young Structural Engineers 1

CONDITION ASSESSEMENT OF

“THE PROGRESS OF THE STATE” / QUADRIGA

AT THE MINNESOTA STATE CAPITOL

TABLE OF CONTENTS

TABLE OF CONTENTS

INTRODUCTION

Study Summary Methodology Project Participants Acknowledgements

HISTORY

TIMELINE

DESCRIPTION

CONDITION ASSESSMENT, RECOMMENDATIONS

NEXT STEPS

Prioritization, Phasing, and Costs

APPENDICES

Appendix A: Annotated photographs of conditions

Appendix B: Scaffolding quote

Appendix C: Preliminary structural memo

2 MacDonald & Mack Architects

Mattson Macdonald Young Structural Engineers

Mattson Macdonald Young Structural Engineers 3

INTRODUCTION

STUDY SUMMARY

This Condition Assessment of the “Progress of the State” statue, commonly known as the Quadriga, was commissioned by the Department of Real Estate and Construction Services to make more informed decisions about the care and maintenance of the statue.

The primary purposes of this study are to:

• survey and evaluate the physical condition of the Quadriga and its surrounds in order to identify areas of concern; and

• recommend conservation priorities that will remedy condition concerns.

LOCATION

State Capitol; 75 Reverend Martin Luther King Jr Boulevard; St. Paul, MN 55155

HISTORIC DESIGNATION

The State Capitol is listed on the National Register of Historic Places.

Stewardship of the Capitol Complex is overseen by the Capitol Area Architectural and Planning Board.

METHODOLOGY

Investigations were conducted May 23, 2023 to assess the condition of the statue and its surround. All investigations were non-invasive and limited to the areas visible to investigators without lift or scaffolding.

PROJECT TEAM

MacDonald & Mack Architects, Midwest Art Conservation Center, and Mattson Macdonald Young Structural Engineers completed this study.

Angela Wolf Scott served as Principal Architect. Megan Emery served as Lead Conservator. Courtney Murray served as Conservator and Safety Officer. Megan Randall served as Conservator. Ken Green served as Structural Engineer.

ACKNOWLEDGEMENTS

The description of the history of the statue was written by Linda Cameron for MNopedia.

4 MacDonald & Mack Architects

Mattson Macdonald Young Structural Engineers 5

HISTORY

Quadriga: “The Progress of the State” by Linda A. Cameron https://www.mnopedia.org/thing/quadriga-progress-state

A gilded quadriga sculpture group titled "The Progress of the State" stands like a sentinel over the front façade of the Minnesota State Capitol. Architect Cass Gilbert commissioned Daniel Chester French, best known for the Lincoln Memorial in Washington, D.C., to do the work. He sculpted the chariot and human figures, and animal sculptor Edward Clark Potter created the horses. The quadriga (Latin for "four-horse chariot") has greeted capitol visitors since its installation in December 1906.

Gilbert drew inspiration for the third Minnesota State Capitol from the "White City" of the World's Columbian Exposition, held in Chicago in 1893. His earliest drawings for the building included a quadriga sculpture group over the front entrance. Gilbert had seen a quadriga created by French for the Exposition and commissioned him to produce a similar sculpture for the capitol at a cost of $35,000.

To stay within his limited budget, French created a steel frame covered with hammered copper sheets instead of casting the pieces in bronze.

The quadriga measures twenty-one feet long, thirteen feet deep and stands twenty-five feet tall at its highest point. The estimated total weight of the group is four tons—two for the figures and two for the steel-framed base. Five pounds of tissue-thin, twenty-three-and-one-half-karat gold leaf applied over the copper gives the artwork its golden patina.

Titled "The Progress of the State," the sculpture group features a chariot pulled by four horses that represent the forces of nature: earth, wind, fire, and water. Two female figures holding the bridles control the forces of nature. They are "Agriculture" and "Industry" and together symbolize "Civilization." The charioteer is "Prosperity." He holds a staff bearing the name "Minnesota" in his left hand and cradles a horn of plenty filled with Minnesota produce in his right arm. The pineapples emerging from the hub of the chariot wheels are a symbol of hospitality. The forward motion of the group suggests the future progress of the state of Minnesota.

6 MacDonald & Mack Architects

Mattson Macdonald Young Structural Engineers

The "golden horses" are a highlight for the thousands of students and other visitors who tour the capitol each year. When the artwork was new, however, Channing Seabury, vice president of the Board of Capitol Commissioners, thought the completed sculpture too bright and not in keeping with the design of the building. He advised Gilbert to tone it down. Gilbert originally specified a "dull gold" finish for the quadriga. French had intended the sculpture to have a wax coating containing a dark stain applied over the gold leaf to enhance the three-dimensionality of the piece and subdue the golden finish.

Whether for economic reasons or simply an oversight, workers never applied the wax shading.

Minnesota's challenging climate has taken its toll on the quadriga over the years. The sculpture group underwent regilding in 1949 and again in 1979. In 1994, a thorough assessment of the figures by conservators revealed a substantial amount of structural damage. The state legislature provided $636,000 for a full restoration. On August 23, a crane removed each piece of the quadriga from the capitol roof and loaded them onto a flatbed truck bound for Fine Objects Conservation, Inc., in Westport, Connecticut. Conservator Linda Merck- Gould oversaw the work.

The year-long restoration involved replacing the corroded steel supports inside each statue, repairing the copper sheeting, installing a new support system below the sculpture group, and applying a fresh layer of gold leaf. Following French's original instructions, the restorers applied the wax coating containing a dark stain over the gold leaf to the recessed areas of each figure. The restored quadriga returned to its perch on June 21 the following year.

During the total renovation of the Minnesota State Capitol, conservators brought the figure of the charioteer down again on September 23, 2014. Jensen Conservation Services Company in Omaha, Nebraska, restored the figure and workers reinstalled it on August 29, 2015. Each year, conservators examine the condition of the quadriga and make minor repairs or replace sections of the gold leaf as needed.

Mattson Macdonald Young Structural Engineers 7

TIMELINE

The following information does not represent a complete conservation history. The data was gathered from reports provided to the design team by the client and MNOPEDIA, the Minnesota Historical Society’s online database for MN History.

1903 Contract signed to commission Daniel Chester French to design and sculpt Quadriga. French sculpted the figures, while Edward Clark Potter did the horses.

(MNOPEDIA)

1906 Quadriga is installed on the capitol roof. After installation, the vice president of the Board of Capitol Commissioners, complained that the sculpture was too bright. Cass Gilbert, architect of the capitol, who had commissioned the sculpture, was advised to tone it down to a dull gold finish. French had apparently intended for a pigmented wax coating to be applied to enhance the three dimensionality of the sculpture, which had not been done. It is assumed it was added at this time. (MNOPEDIA)

1949 Regilded for the first time since installation.

(MNOPEDIA)

1979 Repair work and regilding. (MNOPEDIA)

1994 Removed and transported to Fine Objects Conservation, Inc, Westport, CT, for structural work which reportedly included replacement of corroded steel supports inside each figure, repair of copper sheet, installation of support system below sculpture, and regilding. (MNOPEDIA)

1995 Quadriga reinstalled after reinforcement & conservation; Fine Objects Conservation, Inc.

(MNOPEDIA)

2010 Maintenance treatment carried out by Jenson Conservation Services, in-situ. Maintenance included selectively reducing coatings around areas of copper corrosion, cleaning bare metal, and reapplication of coatings. (Report provided by client)

2014-15 Quadriga removed and conserved; Jensen Conservation Services, Inc. 2016: Full conservation

8 MacDonald & Mack Architects

Mattson Macdonald Young Structural Engineers treatment carried out by Jenson Conservation Services.

Treatment included abrasive cleaning with glass beads, structural stabilization where needed, application of a Sherwin Williams Industrial paint system including DTM Wash Primer and Macropoxy 646 tinted yellow, gilding with 23 carat gold and Charbonnel Mixtion a Dorer gold size, toning of highlights with craft store acrylic paint, and application of a protective wax coating using SC Johnson Paste Wax. The base (referred to as the shroud in past reports) was coated with a Macropoxy primer, followed by a Sherwin Williams Corothane I-Aliphatic Urethane paint system. (Report provided by client)

2016 Quadriga reinstalled; Jensen Conservation Services, Inc. (MNOPEDIA; report provided by client)

2019 Assessment and/or maintenance performed. (No report was provided)

2023 Quadriga assessment; Midwest Art Conservation Center and MacDonald & Mack Architects

Mattson Macdonald Young Structural Engineers 9

DESCRIPTION

Progress of the State, commonly referred to as the Quadriga, is a monumental sculpture installed on the South Capitol Drum Terrace.

Quadriga depicts a two-wheel chariot pulled by four horses with three classical human figures. A male figure stands on top of the chariot holding a horn of plenty in his right hand and the staff of Minnesota in his left, while two female figures are present on each side of the chariot, between a pair of horses: one female represents agriculture, the other industry.

The sculpture was constructed from sheets of copper sheet, hammered and worked around a steel armature. The entire sculpture was gilt with gold leaf and, according to records, made less bright through the application of a pigmented wax coating. The sculpture is mounted to a large steel base which gets anchored to the rooftop. Reinforcement rods are present between the sculptural elements to provide additional stability to the installation.

The structural base is made up of a grid of structural steel members enclosed with a painted metal cover with perforated metal at the lower perimeter for venting. The sculpture sits on a portion of the balcony beyond the marble balustrade, directly above the main entrance to the Capitol. The deck on which the sculpture sits is paved with tile, except for the immediate footprint of the structural steel armature base. The footprint of the sculpture is a raised plinth, clad in painted metal, with drainage trenches on either side.

10 MacDonald & Mack Architects

Mattson Macdonald Young Structural Engineers 11

CONDITION ASSESSMENT

The Quadriga and surrounding area was reviewed May 23, 2023.

The overall condition of the sculpture, base, and surrounding area is good. There are several areas that should be addressed, including the bird screen under the chariot, the structural elements, and the base.

General condition issues seen throughout the sculpture include small, localized areas of exposed and corroded copper; cracks/open seams in the copper sheet; abrasion and gilding loss; lifting paint and paint loss; and deterioration of the wax coating. A layer of dirt, grime, insect debris, and bird guano are present overall. The following is a detailed condition description and recommendations.

SCULPTURE (see Appendix A for annotated photographs)

Horse, Proper Left

• The anchor attached to the proper right haunch, connecting the horse to the male figure, has a split bracket, possibly from tension/metal fatigue. The top two screws of that bracket have an unknown purpose. Those two screws are stripped, and one has lost its gilding. The connection does not feel loose at this time but should be examined by a structural engineer.

• Spots of green copper corrosion are present on the proper left testicle, as well as the inner thigh/groin area.

• Seam lines in the metal have opened along the back proper left hoof; front proper left hoof; and proper left ankle.

• A small puncture with a radiating crack pattern is present on the proper right back leg.

• Four open pinholes are present along the belly seam with associated runoff staining and wear of the gilding.

• Scattered areas of abrasion and loss are present throughout the gilt surface, revealing either the yellow or white primer layer. Abrasion is most prominent along raised and upper facing surfaces.

• Craquelure of the paint is visible through the gilding.

12 MacDonald & Mack Architects

Mattson Macdonald Young Structural Engineers

• The wax coating has broken down overall with loss, blanching, and visible brush marks. Grime has accumulated within the wax.

Woman, Proper Left

• There is no visible corrosion and all points of attachment look good.

• Gilding is most heavily abraded on upper facing surfaces and along seam lines.

• On the back of the dress the acrylic wash added for dimensionality has flaking areas of loss. The wax layer has accumulated dirt and grime.

• On the base, there are cracks and areas of loss in the paint adjacent to the figure’s feet.

Horse, Middle Proper Left

• Small openings are present along several of the body seam lines. Lifted hoofs have weep holes in the front center with adjacent splitting of the metal seam: all split seams appear to be stable. The front proper right hoof also has a split in the metal through the back of the hoof. The front proper right shoulder and top of leg has a crack along the seam.

• Spots of green copper corrosion are present on the proper left testicle, as well as the inner thigh/groin area.

• The gilding has scattered areas of abrasion and loss, the depth of abrasion reveals either the yellow or white primer layer.

Abrasion is most prominent along raised and upper facing surfaces.

• The connection rods have extensive losses in the gilding revealing the white primer.

• Staining from water run-off is present overall.

• The wax coating has deteriorated overall with blanching and visible brush marks. Grime has accumulated within the wax.

• On the base, the paint has cracked adjacent to the proper left back hoof and the proper right hoof.

Mattson Macdonald Young Structural Engineers 13

Chariot

• The “L” brackets at the axel connection are corroded (they appear to be steel).

• The pigeon cage appears to have scratched the surrounding surfaces during installation. The cage is coated metal mesh but has losses throughout the coating and appears to be steel.

• On the underside of the shaft, there is a line of whitish corrosion.

• The armature and interior surfaces of the chariot have peeling, lifting paint with an overspray texture. There is a separate metal layer from the gilded surface. There is iron corrosion on the underside of the substructure: the steel is not properly coated, and it appears it was not removed or addressed during the 2016 treatment.

• The center seam on the top of the shaft has slight wear with point corrosion along the length, associated with a weld or solder join.

• The copper sheet that connects the top of the chariot to the shaft is stable and secure, but a weak point that should be examined by a structural engineer.

• The fruit garland on the front of the chariot has a small area of paint loss exposing bare metal: the metal has rust colored corrosion. On the back of the chariot, the garland has an epoxy fill that appears to be on top of the gilding. The fill is untoned or has lost its gilding.

• On the proper left side, the seam of the wheel rim has opened in several locations, especially along the bottom edge and the overlapped seam at top center. Small holes are present along the pineapple seam at the top center.

• On the proper right side, there are holes along the outer rim of the wheel. The primer is lifting on top of the pineapple.

• On the top of the chariot, along the front edge are large cracks in the paint layers with active lifting, flaking and loss.

The paint is very brittle and appears poorly bound.

14 MacDonald & Mack Architects

Mattson Macdonald Young Structural Engineers

• Scattered areas of abrasion and loss are present throughout the gilding. Abrasion is most prominent along raised and upper facing surfaces.

• Staining from water run-off is present overall.

• The wax coating is broken down overall with evident brush marks and areas of complete loss. Grime has accumulated within the wax.

Male Charioteer

• Connection plates that secure the figure atop the chariot have corroded and missing bolts: two are corroded, two are missing nuts, and two appear to be missing entirely.

• There are gaps, likely original at the base of the figure’s feet.

The garment, gathered near the base on the proper left, has a split in the copper sheet that is stable and without corrosion.

• The square mount that anchors the man’s staff has two screws that sit above the countersunk mount: they appear secure.

• Areas of abrasion are present in the gilding and the wax coating has deteriorated.

Horse, Middle Proper Right

• Spots of green copper corrosion are present on the proper right thigh and testicles.

• Paint on the base has cracked at the interface of the proper front hoof.

• Gilding has scattered areas of abrasion and loss throughout.

• The wax coating has deteriorated with blanched and visible brush marks. Grime has accumulated within the wax.

Woman, Proper Right

• There is no visible corrosion and all points of attachment look good.

• Seam lines of garments are open along the back.

Mattson Macdonald Young Structural Engineers 15

• The gilding is most heavily abraded on upper facing surfaces, along seam lines, and on stability rods. On the proper right shoulder, there is a section of mobile solder with flaking primer and gilding loss.

• The back of the dress has a thick layer of dirty wax with brush strokes. The acrylic wash added for dimension has areas of flaking and loss.

Horse, Proper Right

• There are spots of green copper corrosion on the proper right side of the groin.

• There are splits in the seams on the backs of the proper left and proper right back hooves, as well as the front proper right hoof. There is exposed bare metal on the front proper right hoof that has not corroded. There is also bare metal at the reinforcing rod at the back proper left haunch.

• There is a bolt loose on the proper left side of the horse near the front shoulder.

• The gilding has scattered areas of abrasion and loss, the depth of abrasion reveals either the yellow or white primer layer.

Abrasion is most prominent along raised and upper facing surfaces.

• The wax coating has broken down overall with evident brush marks and areas of complete loss. Grime has accumulated within the wax.

Sculpture Conditions Analysis

With little to no maintenance since the 2016 treatment, the sculpture remains in good condition with expected signs of wear and abrasion.

The wax coating was effective at both dulling the bright surface finish and protecting the gilt surface. However, at this time the coating is no longer effective and visually distracting with a whitish (blanched), dirty appearance.

Abrasion and losses within the gilt surface are to be expected due to exposure to extreme weather conditions. At this time, losses are small, scattered throughout, and not visually distracting. Maintaining the wax coating will help reduce loss and wear to the gilt surface.

16 MacDonald & Mack Architects

Mattson Macdonald Young Structural Engineers

Painted acrylic shadows between the gilding and wax layers, have worn unevenly with some flaking. This is likely the result of the quality of the craft store acrylic used and long-term exposure to weather.

The openings/separations along copper seams are considered acceptable at this time as they allow for proper drainage of trapped moisture and are structurally stable. Their size and condition should be monitored annually: treatment may be recommended if corrosion begins to form, or they become larger in size.

Localized treatment can only be carried out on portions of the sculpture that are accessible from the platform. Scaffolding is required for any overall maintenance procedure or treatment.

Sculpture Recommendations

The wax coating should be maintained to reduce the rate of deterioration to the gilt surface. Scaffolding is required to fully apply the wax coating.

The sculpture should be examined annually, and minor condition issues (such as spot corrosion and flaking paint) addressed as they present themselves.

Mattson Macdonald Young Structural Engineers 17

STRUCTURAL ELEMENTS

The statues contain steel armatures to support and reinforce them. The armature includes a web of steel beams under the base, steel angles within the chariot, straps and rods visible around and between the elements of the statues, as well as structural steel members that are not visible inside the statues.

The straps at the rear of the Quadriga connect the chariot to the balcony ledge. They are anchored at the balcony with bolts that were loose at the time of inspection. Review structural memo in the appendix for a more complete discussion of the bolts. These bolts will likely need to be replaced.

There were several instances of loose screws anchoring the rods to the statues and brackets that do not sit tight to the statues. Review structural memo in the appendix for a more complete discussion of the bolts and anchors. These screws will likely need to be replaced with screws of proper length and metal.

The coating on the armature inside the chariot is peeling.

We recommend recoating the structural elements.

These elements provide the sculpture with structural support and need to be maintained rust-free and inspected regularly.

We recommend a more complete assessment be conducted when there is access to the Quadriga via scaffolding.

BIRD SCREEN

The hollow void under the chariot houses the armature for the central portion of the sculpture.

The underside of the chariot and the axel and open but covered with metal mesh to prevent pests from entering the void space.

The metal mesh has scratched the gold leaf and there is some risk of corrosion due to contact between dissimilar metals.

18 MacDonald & Mack Architects

Mattson Macdonald Young Structural Engineers

We recommend replacing the metal mesh with a type of mesh that will not react with the surrounding materials or damage the finish of the statue.

BASE

The base of the Quadriga is a cover to the network of structural steel beams that form the lower portion of the armature.

The white paint on the base is peeling.

There are some small holes in the base cladding.

We recommend recoating the base and maintaining the base and coating in a watertight condition to protect the structural elements of the Quadriga.

Openings that admit water to the steel armature of the base may need to be patched to protect the structural steel from corrosion.

Mattson Macdonald Young Structural Engineers 19

NEXT STEPS

The conservation of the Quadriga requires materials and labor that will not be available before cold weather this year. The following are our recommendations for next steps:

January 2024 Finalize schedule for conservation work and order materials.

End of May 2024 Install scaffolding (assume two weeks)

Mid-June 2024 Commence conservation work.

Structural engineer finalizes assessment.

Mid-July 2024 Conservation work complete.

Scaffolding removed (assume one week)

APPENDIX A:

MIDWEST ART CONSERVATION CENTER

ANNOTATED PHOTOGRAPHS

Progress of the State Conservation Assessment 2023

This image was found online as a representation of the whole sculpture. It does not represent current condition state. All other images in this document were taken by MACC conservators on May 23, 2023.

The following images represent a snapshot of current condition issues with brief description. More images can be provided by MACC for future condition reference.

Condition:

• Structural concerns include loose bolts.

• Distorted/Splitting anchor points.

• Rust/corrosion on armature and exposed metal.

• Spot corrosion on copper.

• Rust/corrosion on steel supports.

• Cracks, open seams in copper sheet.

• Small punctures within copper sheet.

• Cracks, open seams in copper sheet.

• Mobile solder join.

• Flaking/lifting paint on top of chariot.

• Abrasion, loss of gilding.

• Deterioration of wax coating.

• Deterioration of wax coating and acrylic highlights.

• Staining/deterioration of wax from water runoff.

• Flaking/lifting paint on base.

APPENDIX B:

SCAFFOLD SERVICES

SCAFFOLDING QUOTE & INFORMATION

12651

2274 Capp Road - St. Paul, MN 55114

651-646-4600 651-649-4399 fax

Swingstage~Scaffold~Shoring

Enclosures~Training www.scafserv.com

$4,500.00 plus applicable taxes

$23,520.00 - cost for work if performed in 2024

$24,416.00 - cost for work if performed in 2025

$400.00

$2,000.00 estimated amount plus tax - applicable if required/requested

Sincerely, By:

Title:

Cell #

Email jeff.waibel@scafserv.us Date:

Job Number

P.O.#:

Salesman

Scaffold Service (SSI) is pleased to provide you with this quote for the following project:

Project Name: MN State Capitol Quadriga Project Address: 75 Rev. Dr. Martin Luther King Jr. Blvd.

City/State/Zip: St. Paul, MN 55155

We will supply, erect and dismantle scaffolding for access to the Quadriga Statue at the a MN State Capitol for inspection and repair as requested. THIS PRICING BASED ON STATUE BEING FLOWN DOWN TO GROUND PRIOR TO INSTALL. Scaffold is assumed to be based on solid foundation of some sort (i.e. concrete, pavement or similar) and will be built on either side of the statue with trusses spanning between them to support additional structure extending up to the taller portions as needed.

Completed scaffold will provide 2 hand access to entire statue area not reachable from ground or short ladder. All working levels will be fully planked and guard railed per OSHA requirements.

Pricing based on assumption that scaffold will be built at location SSI's truck may park at with out a need to pack equipment between truck and build area.

During installation and dismantle phases, precautions will be taken to protect the statue. Prior to installation, a pre-install meeting will be requested to ensure all parties are comfortable with precautions. Any specific COI requests and/or liability verbiage will need too be addressed prior to execution of agreement to provide scaffolding for this project is fully executed.

Labor pricing provided separately for work if performed in 2024 or 2025 per request. Engineering price provided as alternate in event it's required/requested.

The customer is responsible for all applicable permits, and for providing parking spaces for the SSI truck(s) while onsite during the erecting and dismantling phases.

Jeff Waibel

Thank you for considering Scaffold Service for this project and we look forward to working with you.

Accepted:

Scaffold Service (SSI) MacDonald & Mack Architects

Jeff Waibel plus applicable taxes

June 27, 2023

Job Number

Revised 6/27/23

Angela Wolf Scott MacDonald & Mack Architects 3101 E. Franklin Ave.

Minneapolis, MN 55406

Customer Responsibilities:

Rental: per 28 days, Labor*: plus applicable taxes

Trucking: plus applicable taxes

Engineering:

651-248-1920

Account Executive

12651

TERMS AND CONDITIONS

* Quote is valid for 30 days from the date above

* The above prices DO NOT include any applicable city or state Sales Tax unless otherwise stated

* Rent starts the first day of erection and ends the last day of dismantle.

Arrangements can be made for earlier or later start times, please ask you sales representative.

* SSI is not responsible for any damages to trees, lawns, landscaping, or concrete.

* No retainages shall apply to SSI. We provide a service to get people to their work. We don’t install anything permanent to a structure.

45044 page 2

The customer will be charged for any delays SSI experiences while at the job site in addition to the amount proposed in this contract.

Weather conditions and wind factors may cause a delay. SSI will determine if it is advisable to erect or dismantle scaffolding if weather or wind conditions apply. Competent person and/or SSI safety director to make determination.

Customer is responsible for charges as a result of any damaged or lost equipment, including equipment not returned to SSI. Charges may include, but are not limited to: replacement at list price, cleaning charges, etc.

Insurance - Lessee shall keep the equipment insured against all risks of loss or damage from every cause whatsoever for not less than the full replacement value thereof, and shall carry comprehensive public liability and property damage insurance with contractual liability, but lessee’s failure to have such insurance shall not lessen lessee’s obligations herein. Lessee must provide lessor a copy of the above-mentioned insurance certificate referencing the job site name prior to the job beginning.

Cancellation of a signed contract is subject to a 15% surcharge of the entire contract value, including but not limited to the anticipated rental term.

Terms - Invoices for rental are due 30 days from the invoice date. Late payments will be charged a 1-1/2% service charge per month.

Lessee agrees to pay lessor all costs and expenses, including collection charges and attorney’s fees, in enforcing the terms of this

There must be a clear and unobstructed pathway to the site. The customer is responsible for removing any obstruction. This includes, but is not limited to obstructions caused by the weather, such as ice and snow.

Customer is responsible for providing a level and stable foundation (i.e. level and compacted ground conditions).

If applicable, it is the sole responsibility of the customer to validate the structural integrity of all surfaces that will be built upon (i.e.

engineers approval).

This proposal is bid in accordance with the requirements as outlined in OSHA section 1926 for the erection and dismantling of scaffold.

Any deviation from this standard will result in additional charges.

Customer is responsible for any engineering costs associated with the above referenced project.

Any estimates given to you regarding the extent of the job may change based upon further on-site evaluations by SSI personnel or any alteration from the original information we were given.

SSI requires a minimum of 24-48 hours between receipt of a signed contract and the time we are expected to begin the erection.

Scaffold Service is not responsible for permits necessary for this project. Customer is required to arrange any parking or parking permits for SSI vehicles.

The above rental rates are contingent upon equipment availability.

Proposal is based on equipment availability at time of rental.

The labor will be billed in two parts. The first billing will be issued upon completion of the erection portion of the job. The second billing will be issued after the equipment is dismantled and returned to SSI.

All trucking will be billed at the rate quoted above UNLESS the customer elects to dismantle the equipment themselves. If SSI has to return to the jobsite to pick up the materials only, Return trucking will be billed out at $105.00 per hour in lieu of the quoted rate.

Regular labor hours are Monday- Friday 7:00 am-3:30 pm, Rental based on 7 day week and 28 day month.

APPENDIX C:

PRELIMINARY STRUCTURAL MEMO

2023-12-20 - Quadriga - Preliminary Structural Condition Assessment.docx Page 1 of 6

December 20, 2023

Angela Wolf Scott MacDonald & Mack Architects 3101 East Franklin Avenue Minneapolis, Minnesota 55406

Re: Quadriga at the Minnesota State Capital Phase I

MMY Project No: 23286.00

Dear Angela:

We were asked to perform a preliminary review of the existing conditions of the Quadriga Sculpture, at the Minnesota State Capital, St Paul, Minnesota. This is part of a larger restoration project for the sculpture and additional work is anticipated in Spring of 2024. We visited the site on October 25th, 2023 in order to form an opinion of the existing condition and extents of repair and reinforcement would be required. The following is a summary of my observations and opinions:

Purpose and Scope It is our understanding that the Quadriga will be undergoing restoration in 2024 and a preliminary understanding of potential structural deterioration and areas of concern is desired prior to that work commencing. This report will be incorporated into a larger document covering additional aspects of the sculpture.

Observations that were performed are considered a cursory "walk-through". The performance of the structural system and framing elements was judged by visual observation only. This work should not be considered a detailed investigation of all elements. Structural analysis and calculations were performed at our discretion when observed conditions raised questions concerning the adequacy of specific building elements.

Qualifications of the Personnel Kenneth J Green P.E. is the author of this report, the lead investigator and the Structural Engineer of Record (SER). Ken has over 30 years of experience in the field of structural engineering and has performed condition reviews of numerous buildings and structures similar to the subject building.

Methods of Investigation The method of investigation was by casual observation and was limited to those structural elements that were exposed to view. No attempt was made to perform an exhaustive investigation of all structural elements. No finish material was removed or damaged to expose the

Minnesota State Capital Quadriga December 20, 2023

2023-12-20 - Quadriga - Preliminary Structural Condition Assessment.docx Page 2 of 6 underlying structural elements.

Measurements of the building and various building elements were taken during the observation only to aid in our research and investigation when we deemed this to be necessary. If dimensions are provided in the report or on sketches should be considered approximate and not used without field verification.

Structure Description The Quadriga is a chariot pulled by four horses with three human figures. The statue has an internal armature structure supporting the hammered copper cladding. The quadriga is approximately twenty-one feet long x thirteen feet deep in plan and about twenty-five feet tall at its highest point. A gridwork of steel framing supports the sculpture above the roof structure. It was originally constructed in 1906 and undergoes restoration about every twenty years. The most recent restoration was performed 2014 to 2016, with the sculpture being removed from the roof and included some structural stabilization.

Observations and Opinions The structural evaluation for the assessment was made by visual observation. The observations were made at accessible areas. Observations were utilized to make an initial assessment of the building condition and to look for evidence of damage, deterioration, and movement.

Overall, the sculpture was judged to be in good condition given its age. Specific areas of concern are noted below:

The sculpture is hammered copper with multiple brackets connecting the pieces to each other.

There is a hidden armature inside the copper cladding, with a limited portion visible from beneath the chariot. The sculpture sits on a painted metal base with a steel framework below. The framework below could not be observed and future work should include removing some of the perforated metal panels around the base to allow for review.

Some of the screws and bolts have lost their gilding and have some corrosion. It is unclear what the original screw and bolt material is. A majority of these appear to be connecting gilded pieces to the sculpture. Steel and copper will cause corrosion when connected together; a connector with a proper coating or material to minimize galvanic corrosion should be used.

There is some pitting and cracks observed in the copper. This is likely where the sheets of copper came together to form the sculpture. These should be monitored for changes, noting there will be seasonal changes based on thermal expansion.

2023-12-20 - Quadriga - Preliminary Structural Condition Assessment.docx Page 3 of 6

Proper Left Horse A bracket on the Proper Left Horse is separated and has screws that are not fully engaged. The bracket is made of multiple pieces, but shows some corrosion causing some rust jacking between two plates. An upper screw that connects the brace to the bracket plates is not fully engaged. This may be because the screw was too long for the location.

Center Left Horse The center left horse has a bracket that does not fit tight to the body of the horse. This is the opposite end of the brace connecting to the proper left horse.

Photo 1 - Proper Left Horse

Photo 2 - Center left horse

2023-12-20 - Quadriga - Preliminary Structural Condition Assessment.docx Page 4 of 6

Proper Right Horse The proper right horse has a similar bracket as noted on the proper left horse, made of multiple plates. The bracket does not sit tight to the body of the horse. Screw heads are stripped and have some corrosion.

Bracing Brackets At the building side of the sculpture are two steel brackets supporting angle braces to the sculpture. The brackets are anchored into the roof structure with what appears to be epoxy anchors.

On the proper right side bracket, the nuts are loose and not supporting the loads. The bolts will need to be tightened and will likely require replacement if not able to be correctly fastened.

Photo 3 Proper Right Horse

Photo 4 - Rear Brackets

Photo 5 - Proper right side bracket

2023-12-20 - Quadriga - Preliminary Structural Condition Assessment.docx Page 5 of 6

On the proper left bracket, the bolts were cut flush with the nuts; however, the nuts were damaged in the process. This and the epoxy will make repair and replacement of these bolts difficult.

The bolts connecting the braces to the brackets are short and do not fully engage the nuts. Proper length bolts should be used, with the bolts fully engaging the nuts as a minimum.

Support Framing The support framing is mostly hidden from view. Some steel angles were visible through the bird screen below the chariot and appeared in good condition with little corrosion visible. There is a flat metal panel at the base of the sculpture obscuring view of the framing extending upward into the chariot.

There are perforated metal panels around the base of the sculpture that appear to be removable. When scaffolding is erected around the sculpture, these panels should be removed to allow observation of the condition. Currently there is no evidence of structural distress for the support framing and there appears to be sufficient drainage to prevent excessive water accumulation below the sculpture.

Summary Overall the sculpture is in good condition. The major structural concerns are replacement of some of the connection hardware for corrosion or to use the proper length fasteners. Further review of the hidden areas and upper connections should be performed when there is scaffolding allowing for safe access.

Photo 6 - Proper left bracket

Photo 7 - Bolts from below bracket

2023-12-20 - Quadriga - Preliminary Structural Condition Assessment.docx Page 6 of 6

Limiting Conditions The opinions and recommendations contained in this report are based on a cursory observation of the building. No attempt was made to perform an exhaustive investigation of all conditions and building elements. It is possible that conditions exist that cannot be discovered or judged as a result of this limited nature of investigation. The work provided in the preparation of the report concerns the structural system only and is not intended to address mechanical, electrical or plumbing systems, fire protection or handicap accessibility. The owner is encouraged to discuss these items with a building official and other design professionals for guidance and recommendations.

If you have any questions concerning the above, please do not hesitate to contact me.

Sincerely, Mattson Macdonald Young, Inc.

Kenneth J. Green, P.E.

Mattson Macdonald Young Inc.

I hereby certify that this plan, specification or report was prepared by me or under my direct supervision and that I am a duly licensed Professional Engineer under the laws of the State of Minnesota.

Kenneth J. Green, P.E.

Date: 12/20/2023 MN Reg. No. 26449 .