Amendment_03_Old_Courthouse_Preservation_Plan_Matrix_2022_08_03_03.pdf

PMIS/PKG NO. 242900/253127 APPENDIX T:

HISTORIC PRESERVATION PLAN MATRIX

APPENDIX T:

HISTORIC PRESERVATION PLAN MATRIX

Special Protection Heating, Ventilation & Air Conditioning (Cont'd) SP‐01: Exterior Site Features (1/61) SP‐02: East and West Courtroom Built‐in Furniture (2/61) SP‐03: Existing Lighting (3/61) SP‐04: Interior Floors (4/61) SP‐05: Original Masonry Construction (5/61) SP‐06 Interior Finishes, Doors, Hardware & Trim (6/61) SP‐07: Cast Iron and Wrought Iron Elements (7/61) SP‐08: Plasterwork & Wood lath (8/61) SP‐09: Archeology & Artifacts (9/61) SP‐10: Miscellaneous Loose Item in the Building Remaining During Construction (10/61)

Exterior Chases and Penetrations

Windows Interior Chases & Penetrations Examples

Accessibility Upgrades‐Plan and Interior Alterations

Fire Protection System

Electrical Upgrades

Heating, Ventilation & Air Conditioning HVAC‐01: Radiator & Window AC unit Removal (28/61) HVAC‐02: Plaster Repair at Radiators (29/61) HVAC‐03: Floor Repair at Radiators (29/61) HVAC‐04: New Fan Coils in West Corridor #103 (30/61) HVAC‐05: New Fan Coil in North Stairway West Side #108 (31/61) HVAC‐06: New Fan Coil in North Stairway East Side #108 (32/61) HVAC‐07: New Fan Coils in East Corridor #116 (33/61)

Historic Preservation Plan Matrix Index ‐ Old Courthouse Accessibility Improvements Phase 2 8/3/22

HVAC‐08: New Fan Coils in South Transept East #120 (34/61) HVAC‐09: New Fan Coil in South Stairway West Side #121 (35/61) HVAC‐10: New Fan Coil in South Stairway East Side #121 (36/61) HVAC‐11: New Fan Coils in South Transept West #125 (37/61) HVAC‐12: New Fan Coils in Staff Bathrooms #201 & #206 (38/61) HVAC‐13: New Fan Coils in New Staff Access. Bthrm & 2nd Flr Lobby #209 & #209B (39/61) HVAC‐14: New Fan Coils in North Stairway 2nd Floor East Side #211 (40/61) HVAC‐15: New Fan Coil in North Corridor 2nd Floor #214 (41/61) HVAC‐16: New Fan Coils in North Transept 2nd Floor East Side #217 & #217C (42/61) HVAC‐17: New Fan Coils in S. Transept 2nd Flr Both Sides #225, #226, #228 & #229 (43/61) HVAC‐18: New Fan Coils in South Stairway 2nd Floor East Side #227 (44/61) HVAC‐19: New Fan Coil in East Corridor 3rd Floor #318 (45/61) HVAC‐20: All New Horizontal Blower & Fan Coils (46/61) HVAC‐21: New Exterior Chillers in Southwest Courtyard (47/61)

IC‐01: South Wing 1870 Chimney Flue (15/61) IC‐02: Penetrations Located at 3 corners of the building at Attic Level (16/61) IC‐03: North Wing Chase Example #1 (17/61) IC‐04: North Wing Chase Example #2 (17/61) IC‐05: East Wing Chase Room #035 NW Ceiling (18/61) IC‐06 East Wing Chase Room #035 East Wall (18/61) IC‐07: Chases thru North & South Galleries (19/61)

FP‐01: Existing Standpipe Cabinets (20/61) FP‐02: New Fire Suppression Exterior Connections (21/61) FP‐03: New Fire Suppression Line & Indicator Post (22/61) FP‐04: New Fire Pump Room & Access (23/61) FP‐05: New Fire Suppression in Rotunda & Dome (24/61) FP‐06: Ceiling Removal for Fire Suppression & HVAC (25/61) FP‐07: New Fire Suppression in West Courtroom #207 (26/61) FP‐08: New Fire Suppression in East Courtroom #220 (27/61)

W‐01: Preservation of Historic 19th Century Windows (48/61) W‐02: Preservation of 1910‐12 Window Frames & New Sash Installation (49/61) W‐03: Installation of Horizontal Retractable Screens (50/61) W‐04: Installation of Pigeon Control (50/61) W‐05: Exterior Window Paint Colors (50/61)

PA‐01: Plan Alterations to Elevator & Lobby Areas Rms. #107, #209 & #209B (51/61) PA‐02: Plan Alterations to North Wing Room 2nd Floor Rooms #212 & #215 (52/61) PA‐03: Plan Alterations to East Wing 2nd Floor Rooms #223 & #223A (53/61) PA‐04: Installation of 2nd Floor Ramps & Courtroom Door Hold Opens (54/61) PA‐05: Installation of 2nd Floor Rotunda Guardrail Room #200 (55/61) PA‐06: North & South Exterior Door Alterations (56/61)

E‐01: New Electrical Service ‐ Ameren Vault & Direction Bore to West Wing Bsmnt (57/61) E‐02: New Electrical Service ‐ Gaining Access to Direction Bore the "Intercept Pit" (58/61) E‐03: New Electrical Service ‐ Conduit from Switch Box to Generator & Fire Pump (59/61) E‐04: Upgraded Generator (60/61) E‐05: New Interior Light Fixtures (61/61)

EC‐01: Alterations to Window #B‐041 (11/61) EC‐02: Alterations to Windows #B‐042, #B‐043 & #B‐045 adj masonry penetrations (12/61) EC‐04: Alterations to Window #3‐013 (13/61) EC‐04: Other Proposed Exterior Penetrations ‐ See FP for additional (14/61)

Old Courthouse Accessibility Improvements Phase 2 Historic Preservation Plan Matrix

Refer to Construction Documents for Scope NPS archeology/historic consult req'd w/ C.O.

Gateway Arch National Park ‐ National Park Service Page 1 of 61 ‐ 8/3/2022

Item No.

Item Description Images Reason for Impact Quantity of Potential Impact Design Decisions

(Proposed Mitigation) NPS Construction Notes

Special Protection The work will primarily be in the west courtyards but could potentially affect any of the described components.

Measures must be taken to protect these site features. If protection cannot be assured then temporary relocation must be considered.

See Sheet S‐208 for material and equipment loading restrictions on the site and in the building are: 1) limited 50 psf against exterior walls and moat walls 2) no material is to be brought up the exterior ramps 3) weight limits are specified in various locations of the building but limited to the west and north wings and the NW quadrant of the 1st floor rotunda connecting these spaces 4) No building material can be brought up the north cast iron stairs, weight limitations on the other 2 stairs or overlook stairs has not yet been determined and to be clarified for contractor by structural engineer.

The eastern side of the OCH is restricted from staging and equipment.

A 10'‐0" x 54'‐0" portion of the brick sidewalk will need to be removed and replaced at the NW section for an underground electrical Ameren vault. The vault top is concrete & cannot deviate from specs, cannot be set lower to accomodate thickness of brick or be colored or stamped a brick pattern per Ameren.

Exterior Site Features: Several site features will need special protection during construction, including:

1). Dred & Harriet Scott Statue by sculptor Harry Weber, installed near the east entrance in 2012.

2). Corinthian column capital & base from the Federal Customs House, built 1852‐1857, which once stood at 3rd & Olive Streets, located in the Northeast Courtyard.

3). Ionic column & base salvaged during riverfront demolition in 1939‐1942, located in the Northwest Courtyard.

4). The building is surrounded by a cast iron fence replicated in 1955 from an 1868 photograph. The fence parts are difficult to reproduce and the entire fence, including gates, posts, and granite base should be treated as though they are original portions of the building's grounds. The turtle motif references the turtles that once lived in the original fountain taken care of by James Quigley.

5.) The herringbone brick patterned sidewalk dating to the 1950's. The current sidewalk replicates the original sidewalk removed in 1885 for a granitoid sidewalk that remained in place until the 1950's.

6). At the bottom of the east stairs, embedded in the brick sidewalk, is a plaque memorializing Joseph Pulitzer's purchase of his first newspaper, the St. Louis Dispatch in 1878 at auction through the Probate Court located in the east wing, first floor south side. The steps were used for auctions since they were in close vicinity to the court.

7). In the SE courtyard there is a sundial, an original feature of the courthouse landscape and located here since 1858.

8). Also in the SE courtyard is a replica fountain and pool based on early photographs. This fountain was replicated in 1958.

9.) The courtyards have electrical floodlights, underground services and an irrigation system that need to be protected.

10). The moat walls, foundation walls and accessibility ramps.

Northern moat walls have not been stabilized, see structural drawings for building perimeter live load limitations.

11). The granite steps at all four building entrances, they were installed in 1954 replacing limestone steps.

12). Portico railings.

13.) All excavations must be reviewed by MWAC, see Item #SP‐ 09.

SP‐01

The site will be controlled by the contractor and the Northwest courtyard will be directional bored for a new electrical service to the west wing basement. Electric from the west wing to the south and a new water service for the fire protection system will disturb soil at the SW courtyard. New HVAC equipment on a turned down slab will be installed in the SW courtyard.

Heavy equipment will be utilized for this work.

Work areas are specified in the CD's, reference structural for weight limitation adjacent to the unreinforced moat walls. Heavy equipment on the 1950's brick sidewalks may also cause damage and would need to be protected or removed and replaced following completion of work. The building itself must be protected from equipment and vibrations. All precautions must be taken to ensure the building and people are safe.

Photos at Left:

Top: Dred & Harriet Scott statue located at the east entrance south side.

2nd: Corinthian column capital & base from the Federal Customs House at the NE courtyard.

3rd: Ionic column & base from riverfront at center of NW courtyard.

4th: Detail of 1955 era cast iron fence.

5th: Sundial in the SE Courtyard.

6th: Fountain in the SE Courtyard.

7th: View of brick sidewalk area where the Ameren vault will replace brick. (10' x 54').

Drawings at Right:

Top: Sheet A‐100 Site plan calls out some items to be protected. The location of the Dred and Harriet Scott statue and the Pulitzer plaque are on the east side, not west.

2nd: Sheet G‐026, areas shown dashed are site staging areas allowed, adhere to structural constraints at moats on S‐208.

3rd, 4th & 5th (bottom): Portions of site plan from Sheet C‐100 show the proposed vault locations in yellow, Ameren (north) and water (south). A proposed fuel tank at front of moat is found on MP‐100 and portion shown here.

Refer to Construction Documents for Scope NPS archeology/historic consult req'd w/ C.O.

Gateway Arch National Park ‐ National Park Service Page 2 of 61 ‐ 8/3/2022

Item No.

Item Description Images Reason for Impact Quantity of Potential Impact Design Decisions

(Proposed Mitigation) NPS Construction Notes

The site will be controlled by the contractor during construction. Installation of HVAC and fire protection systems will take place in both courtrooms. During this work the utmost care should be taken of the historic built‐in furniture and platforms which will remain in place.

Photos at Left:

Top: 1940s view of the West Courtroom (Rm.

#207) following the north transept fire and stabilization and prior to the ceiling restoration in 1955. Photo by Busch and Latta.

2nd: Current photo of the West Oval Courtroom on the 2nd floor (Room #207).

3rd: Current close‐up view of the 1870 judge's bench area to be protected in the West Courtroom (Room #207).

4th: Photo taken in 1914 of the East Courtroom (Room #220) by R.W. Sanders.

5th: View of the East Courtroom (Rm. #220) Bailiff's stand dating to 1870 to be protected.

7th: View of the 1870s era Judge's bench in the East Courtroom (Room #220) 8th: 1899 plan of the West Courtroom, the judge's bench was located on the north side of the room from 1870 to 1903. In 1903 it was moved to the south side of the room. It's original location was on the west wall from the 1860's to 1870.

Bottom: 1899 plan of the East Courtroom, the judge's bench was located on the east side of the room from 1870 to 1903. In 1903 it was moved back to its original location on the north wall where it had been from the 1850's to 1870.

The work needed in the two courtrooms could potentially affect any of the described built‐ in components.Plaster, architectural features and the marble floor are covered in more detail in other Items #SP‐08, #SP‐ 06 and #SP‐04, these features are also required to be protected from damage.

All protections must be put in place to ensure the Courtroom built‐ins are not damaged in any way. Temporary relocation is not an option for these resources, so careful planning and the installation of protective measures must be considered.

Reference Material:

Tech Notes Temporary Protection #1: Temporary Protection of Historic Stairways During Rehabiliation Work must be applied to the specifications and followed.

Tech Notes Temporary Protection #2: Specifying Temporary Protection of Historic Interiors During Construction and Repair must be applied to the specifications and followed.SP‐02

East & West Courtroom Built‐in Furniture: There are important period significant built‐in courtroom furniture pieces dating to 1870 that will be kept in place in the 2nd floor courtrooms during the proposed renovation work. A 2006 Historic Furnishings Report details the historical and recent alterations that have occurred in these rooms. The following built‐in furniture will require protection:

West Courtroom No. 4, Room #207:

1870 era Judge's Bench with Clerk's Desk & Rail;

1883 era Curved Courtroom Bar;

1870 era Bailiff Stand East Courtroom No. 13, Room #220:

1870 era Judge's Bench, Clerk's Desk and Rail;

1870 era Bailiff Stand;

Judge's platform and jury platform renovated in 1955.

Images below from 2006 Historic Furnishings Report:

Top Left: West Courtroom layout in the 1860's following the 1855‐1860 remodel.

Top Right: East Courtroom original layout in the 1850s‐1870.

Bottom Left: West Courtroom 1955 to present.

Bottom Right: East Courtroom 1903 to present.

Refer to Construction Documents for Scope NPS archeology/historic consult req'd w/ C.O.

Gateway Arch National Park ‐ National Park Service Page 3 of 61 ‐ 8/3/2022

Item No.

Item Description Images Reason for Impact Quantity of Potential Impact Design Decisions

(Proposed Mitigation) NPS Construction Notes

The work could potentially affect any of the of described components.

SP‐03

Existing Lighting: Many of the lighting fixtures in the building are either from the period of signicance, are early replacements or are expensive reproductions of period items. These include chandeliers (gasoliers) in the public corridors, stairwells and in the restored courtrooms, and wall sconces at the upper levels of the rotunda.

In some areas these light fixtures will need to be removed and stored during construction.

See Appendix B of the Historic Preservation Plan for more information about the Old Courthouse special light fixtures.

Photos at right:

Top: Early chandelier installed in the building in the 1940's, there are 2 of these. One in the North Stair Hall #108 and in the South Stair #121 on the first floor. They are not reproductions but they are not originally from the Old Courthouse.

2nd: Early sconces from the building, rewired in the 1940's.Eight of these are located above the upper balconies at th 5th floor within the dome and sixteen more on the walls at the 4th floor (lookout level) of the rotunda.

3rd: The larger reproduction chandeliers located on the first floor in the public corridors and rotunda.

4th: The smaller reproduction chandeliers located on the 2nd and 3rd floors public corridors and rotunda.

5th: West Courtroom reproduction sconces and Judge's bench desk lamps installed in 1958.

Bottom: East Courtroom Judge's bench standards.

Each of the fixtures will be carefully removed and disassembled, packed and labeled to assure reinstallation in the same locations. The components may need to be cleaned (outside of the contract) at an off‐site location. Once removed, the contractor is to verify code compliant condition of existing wiring, inform NPS if wiring is in poor condition. The sconces in the upper rotunda will remain in place and protected during construction unless it is determined they are not safe from damage.

The globes on lighting fixtures in the historic courtrooms, on the judge's benches in both east and west courtrooms, and the wall sconces in the West Courtroom, will need to be removed, marked and stored in a similar manner to the rotunda sconces.

Consideration for the fixtures may require the same treatment for protection.

All early gas piping from 19th century lighting or other evidence of early utilities prior to 1940, the end of the Period of Significance, shall be protected unless directed to be removed. These elements are part of the history of the building and are interpreted as such.

Some existing electrical wiring may be using early gas pipes from gas fixtures for conduit.

The site will be controlled by the contractor during construction. Installation of HVAC and fire protection systems will take place throughout the corridors and in the rotunda. This will necessitate the removal of most of the ceilings in the corridors of the building as well as the ceiling of the inner ring of the Rotunda at the first floor. There are several of the reproduction and early chandeliers in these locations that will need to be removed, stored and re‐installed.

There are other historic or period reproduction fixtures with globes that will need to be protected from construction damage. During construction these fixtures will need to be either protected in place or removed for protection. Some of these light fixtures are noted to remain in place in the construction drawings but it must be determined by the contractor whether the responsibilty to protect these fixtures may require removal and storage instead.

Refer to Construction Documents for Scope NPS archeology/historic consult req'd w/ C.O.

Gateway Arch National Park ‐ National Park Service Page 4 of 61 ‐ 8/3/2022

Item No.

Item Description Images Reason for Impact Quantity of Potential Impact Design Decisions

(Proposed Mitigation) NPS Construction Notes

Since much of the floors are original or from the POS, care must be taken with the way materials and heavy objects are moved. Floors might survive better if plywood or another material was on top of them for protection. Consider allowing only pneumatic tires even though the floors will have a protective covering during construction.

In areas where upper layers of flooring are being called out for removal, care must be taken removing these layers and the NPS must be notified of any issues removing layers directly over the original flooring. Original flooring types at the bottom layer are called out in the CD's.

Where new walls are to be installed over existing original flooring, the method of adhering the bottom plate to the floor must be approved by NPS. No fasteners or non‐removable or staining adhesive may be used that would permanently damage the historic floor.

Reference Material:

Tech Notes Temporary Protection #1: Temporary Protection of Historic Stairways During Rehabiliation Work

Tech Notes Temporary Protection #2: Specifying Temporary Protection of Historic Interiors During Construction and Repair

SP‐04

The site will be controlled by the contractor during construction. Installation of a hydraulic elevator will involve drilling equipment in the building, HVAC, fire protection and plumbing materials and installation will take place in the building, galleries, corridors and in the rotunda. This will necessitate the removal of most of the heavy plaster ceilings in the building attached with metal lathe. There will be a lot of traffic, tools, materials, carts, etc.

on the floors.

Photos at Left Top: View of limestone flagging in the rotunda.

Stone also runs through the corridors. 2nd: Close up view of Rotunda floor (limestone flagging) 3rd:

Removed limestone slab for leveling. 4th: Close up view of stone flagging at the East Wing 1st floor Corridor (2" Barretts) and Stairwell displaying fossils.

5th: Black and white stone tiles found in the South Wing East Gallery installed by Simon Clarke in 1860 under William Rumbold.

6th: Red and white Missouri Iron Mountain marble tiles in West Courtroom installed in 1856. 7th:

Variegated McPherson marble tiles, 1 1/2" thick, installed in 1855.

8th: Encaustic Tile in the South Wing, West Gallery, Rm. #124. 9th: Wood flooring is found at all lupper levels of the Rotunda, the North wing Galleries 1st and 2nd floors (under layers of flooring), the 3rd floor Hallway North wing (exposed) and the West wing Galleries (under flooring and partially exposed). Photo of 3rd floor north wing.

Photos Below:

Left: Terrazzo floor in 2nd floor bathrooms Right: Herringbone brick floors in the West and South Basements and in Room #120.

A large percentage of the floors throughout the building are original or from the Period of Significance. In just a few relatively limited areas original floors and floor systems were replaced with concrete in the 1940s and 1950s. There may be early concrete floors dating to the POS at the North Transept Corridor (#106) and the North Transept East Rooms (#112B, #112C & #112D) that were installed with the upgraded heating system and book elevator in 1907‐09. Assumed post‐period of significant concrete floors are shown below in yellow:

Top: First floor plan 2nd: Second floor plan 3rd: Third floor plan

Interior Floors: The Old Courthouse has a variety of floor finishes, most dating to the original construction of the building.

These are either exposed or under layers of additional flooring added over the years. Flooring materials include:

• Limestone slab floors or flagging (corridors north and south stairwells and rotunda).

• South Wing east first floor gallery (Rm #122): Cut and polished marble tile checkerboard floors in black and white installed in 1860 by Simon Clarke.

• West Wing 2nd floor (Rm #207): Cut and polished stone tile checkerboard floors in red and white from Iron Mountain Missouri installed in 1856 and described in original contract as white and flesh colors.

• East Wing 1st Floor Corridor (Rm #116): Flagging in stone known as Barrett's, 2" thick and sizes 18"‐24" and set in cement averaging 1 1/2" thick.

• East Wing Rooms and 2nd floor East Wing Corridor: Cut and polished stone tile checkerboard floors in tan/grey squares in most of the East Wing. This was installed in 1855 by Empire Stone Company and described as 1 1/2" thick variegated McPherson marble tiles and presumed at all rooms under layers of carpet or exposed except for the 1st floor Corridor and stair.

• An encaustic tile floor in the Southwest Courtroom/Gallery (Rm #124 & south wing 2nd floor). Original date is unknown but this entire floor in Room #124 was removed and one section re‐ installed in 2016, the rest is new replacement. The same encaustic tile is under layers of flooring at the 2nd floor of the South Wing.

• Original tapered tongue and groove wood strip flooring on the second, third, fourth and fifth rotunda balconies dating to 1869.

• Tongue and groove wood flooring within the North Wing galleries and 3rd floor hallway and the West Wing first floors galleries, all of which is original construction.

* Herringbone brick flooring in basements and Room #120.

* Terrazzo flooring in 2nd floor staff bathrooms installed in the 1940's.

Below: 1909 era detail for floor in Room #117 noting asbestolith.

Refer to Construction Documents for Scope NPS archeology/historic consult req'd w/ C.O.

Gateway Arch National Park ‐ National Park Service Page 5 of 61 ‐ 8/3/2022

Item No.

Item Description Images Reason for Impact Quantity of Potential Impact Design Decisions

(Proposed Mitigation) NPS Construction Notes

08The site will be controlled by the contractor during construction. Installation of a hydraulic elevator will involve drilling equipment in the building, HVAC materials and install, fire protection systems materials and install, electrical and plumbing upgrades will take place in the building, galleries, corridors and in the rotunda. This will necessitate the removal of some brick barrel vaulting and the repair of other areas and penetrations through walls, etc. Heavy work such as removing plaster ceilings in the building as well as well as heavy piping and wall removal could cause too much weight in one area or blunt impacts. There will be a lot of traffic, tools, materials, carts, etc. on the archaic and inherently brittle and limited structure.

Images to Far Left:

Top Left: Photo of groin vaulted plastered brick ceiling in Room #225 indicating it was the original exposed ceiling for this room and Rooms #226, #228 & #229.

Top Right: Plan showing complex groin vaulting in the ceiling of Rms #225 & #226. The mirror image of this occurs across the hall at Rooms #228 & #229.

Bottom: Section thru the south transept Rooms #228/#229 and #225/#226 and 1st floor Rooms #120 & #125.

Images at Left:

Top: Section drawing from the 2017 Materials Testing Report showing the construction of the brick barrel vaults sitting on cast iron beams.

2nd: Drawing in "Foster's Book of Measurements" drawn just after construction of similar detail in the building.

3rd: Photograph of typical barrel vaults 4th: Basement floor plan showing groin vaulting layout for ceiling above drawing by NPS 3/16/1942.

5th: Photo of typical brick groin vaulting in a basement without plaster finish.

6th: Photo of plastered groin vaults in East Wing basement ceiling.

7th: View of groin vaulting brickwork with existing damage for piping chase.

Original masonry construction:

• Brick barrel vaults

• Brick groin vaults

• Cut ashlar limestone walls that were once exterior walls at the North Stair Hall (Rm. #108, #211 & #307) and the South Stair Hall (Rm. #121 & #227). These walls have ghost markings from earlier walls and stairs that were removed that are pointed out in some Interpretive programs.

• Masonry bearing walls, especially these walls that still have plaster. The plaster contains early information on paint colors, frescos, stenciling and wallpaper that has been painted over the years and has not been fully studied or documented.

Most of the floor systems in the building are early soft brick barrel vaults running in one direction, are in compression, and bearing on masonry walls or a combination of masonry walls and very early cast iron beams with limited load bearing capacity and brittle structural characteristics that can fracture under stress. There are also groin vaults, intersecting barrel vaults running in two directions bearing on masonry walls. Other floor systems include stone slabs on hollow cast iron box beams located in the stair halls.

The entire building will be effected by this work. While many existing holes through masonry floors will be abandoned and repaired, some chases are anticipated to be enlarged. A final quantity has not yet been fully determined and some areas are not easily accessible.

All masonry repair work to repair prior damage and follow up repair from new work must follow these guidelines:

* The Secretary of the Interior Standards outlined in Preservation Brief #2 Repointing Mortar Joints in Historic Masonry Buildings

* The 1989 Historic Structure Preservation Guide (excerpt on brick replacement is included in bottom of cell to the right).

Image Below: Example of ouline of previous stair removed in the North Stair #108 at east side to be preserved for interpretation.

Many other locations are throughout the building.

SP‐05

Refer to Construction Documents for Scope NPS archeology/historic consult req'd w/ C.O.

Gateway Arch National Park ‐ National Park Service Page 6 of 61 ‐ 8/3/2022

Item No.

Item Description Images Reason for Impact Quantity of Potential Impact Design Decisions

(Proposed Mitigation) NPS Construction Notes

Interior Finishes, doors, hardware & trim: The Old Courthouse contains doors, hardware and trim from multiple eras of original construction and later renovations, many of which are from the Period of Significance determined for this building (1839‐1940).

Every door and piece of hardware tells a story or has yet to tell a story about the building and how it evolved over time. Even doors and hardware from after the period of significance. For instance the 1940s National Park Service renovation items, are still examples of a place and a time and would be difficult to replace if lost or broken and are important for the aesthetic consistency of the spaces.

Many doors and trim are faux painted, a popular atistic technique done by painters in the early to mid 19th century.

Some trim on both doors and windows are signed by the painter and dating to as early as 1881. Damage to any of these items or finishes would be irreplaceable and permanent.

The Rotunda consists of a variety of detailed wood and cast iron columns, wood railings, moulding profiles and murals to be protected from injury or deterioration from humidity, heat or cold temeratures. Also, at the 1st floor level, there are stone benches that will remain in place and must be protected from damage.

The building will be going through an extensive renovation and the contractor will have possession of the building during this time. Equipment, materials, supplies, tools and workers will be moving around in the building. Lifts will be utilized through doorways and across floors.

Images at left:

Top: Pinless hinges patent diagram. These do not have removable pins. Doors that may need to be removed with pinless hinges could detach the wood blocking from the masonry walls, enlarge the holes for the srews or strip the wood that embeds the screws if removed. Removal of these doors may not be allowed unless approved by

NPS.

2nd: Photo example of an early pinless hinge at the Old Courthouse 3rd: Signed frame on early window head trim, possibly dating to original construction of the West Wing 1839‐1843. Signatures from various faux painting work are on many doors and windows with early trim. This one is signed "T.K. Lutz '81" and is located in what was the courtroom for the original Dred Scott case in the West Wing 1st floor.

4th: Typical door and frame matching "Foster's Book of Measurements" dated 1863, see far left, bottom left drawing.

5th: Early hinge with pins, date unkown.

6th: Another example of a pair of doors and frame to be protected, typical in the building.

7th: Entry door to the East Courtroom No. 13 on the 2nd floor. The leather doors, glass transom add another layer of protection necessary. These finishes are original to the building and part of the historic fabric dating to within the Period of Significance (POS) and cannot be replaced.

The potential of adverse effects pertaining to this topic applies to the entire building, since so many of the original doors, and so much of the original hardware and trim survive.

Images at far left:

Top left: Drawings of interior window and trim in "Foster's Book of Measurements" dated 1863, page 52.

Top right: Photo of one of the windows in Room #104, half of the early Circuit Courtroom where 2 trials for Dred Scott and family's freedom were heard.

These windows may be original to the west wing construction.

Bottom left: Drawing of interior door in "Foster's Book..." dated 1863, page 51.

Bottom right: Drawing of a rotunda column pilaster in "Foster's Book..." dated 1863, page 26.

The contractor will be required to protect all woodwork and hardware in the building. Methods of protection will need to be clarified in the Historic Preservation Treatment Plan (HPTP) defined in Specification Section 013591 for acceptance by

NPS.

In the case of the old one‐piece hinges (pinless hinges), removing doors from their frames will not be possible, so doors, hardware and trim will have to be protected in place (see the upper two images on the left for examples of the one‐ piece hinges)

Reference Material:

Tech Notes Temporary Protection #2: Specifying Temporary Protection of Historic Interiors During Construction and Repair must be applied to the specifications and followed.

SP‐06

Refer to Construction Documents for Scope NPS archeology/historic consult req'd w/ C.O.

Gateway Arch National Park ‐ National Park Service Page 7 of 61 ‐ 8/3/2022

Item No.

Item Description Images Reason for Impact Quantity of Potential Impact Design Decisions

(Proposed Mitigation) NPS Construction Notes

SP‐07

Decorative, Structural and Utilitarian Cast Iron and Wrought Iron Elements: The stairways leading between floors throughout the building are made of decorative cast iron. Each portion of these stairways ‐ steps, risers, ballusters, platforms, railings ‐ was a separate cast iron piece created in a custom casting especially for the Old Courthouse during the 1850s.

Early cast iron beams supporting brick vaults make up many of the the floor systems in the Old Courthouse. Floors relying on cast iron beams are particularly susceptible to damage from concentrated loading and/or impact. Refer to Matrix Item #SP‐ 05 for more information on these floors. Early wrought iron roof framing remnants embedded in the walls within the attics need to remain in place.

Images Below:

Upper Left: Typical brick barrel vault floor structure on cast iron beams throughout the Old Courthouse. The floor beams in each wing differ slightly in shape and structural makeup.

Upper Right: One of multiple c.i. beam profiles, each one will be studied for bearing capacity and reversible clamp attachments that will not damage the beam for new hvac units and piping in the drop ceiling spaces. Drawing from 2017 McMullan Structural Testing of the Old Courthouse.

Bottom: Trivers Arch detail 13/A‐602 dated 7/1/22 referencing structural detail for fan coils attachment to above floor structure above.

The contractor will have possession of the building during the renovation, and these one of a kind cast iron stairways, columns, beams, girders, w.i. roof framing remnants, etc. will need to be protected during construction.

Sheet S‐208 states "Do not use decorative cast iron stairs to transport building materials to Level 2". It is assumed this is due to weight limitiations of the north stairs and the reality that cast iron easily fractures under stress. The same evaulations will be done on the rest of the stairs and appropriate restrictions identified. Also, moving heavy or bulky items from floor to floor, level to level via these stairways could also cause visible damage in the form of wear, dents or broken or missing decorative elements. The wooden railings could easily be gouged or cracked.

Photos at Left: Top: South Wing cast iron stairs in Rooms #121 & #227 dating to 1857 and fabricated by J.G. McPheeters of Excelsior Iron Works. 2nd:

North Wing cast iron stairs in Rooms #108 & #211 dating to 1857 and fabricated by J.G. McPheeters of Excelsior Iron Works. 3rd: East cast iron circular stairs circa 1855. 4th: West wing cast iron stairs to 4th floor, one of 2, East wing has a similar staircase. 5th: 1 of 2 sets of stairs concealed in closets at the east and west sides of 4th floor Rotunda. 6th: Wrought iron upper and lower ribs in the dome by Phoenix Iron Company, Chester County Pennsylvania (Inner ribs and outer rib T‐ chords) Photos Below: Left: Example of decorative cast iron column capital detailing in the East Wing basement installed to remove a wall in the basement for the County Collector to utilize the space in 1870. Right: Remnant of wrought iron roof framing in attics

All stairways within the building with the exception of North basement stairs are cast iron.

These include:

East Wing: 1st to 3rd level circular stair and 3rd to 4th level to the east 4th floor overlook on the East side of the Rotunda.

South Wing: 1st to basement dating to 1913 and 1st to 2nd dating to 1857.

West Wing: 3rd to 4th level stair which bisects the entry into the West wing attic and allows access to the 4th floor overlook on the west side of the Rotunda.

North Wing: 1st to 3rd level stairs dating to 1857.

Rotunda and Dome: Two sets of stairs go from the 4th level to the 5th level, one is located in the Northeast closet and the other opposite this one at the Southwest closet. A metal railing wraps around the 5th level.

These stairs connect with a half circle early catwalk of the same era in between the upper and inner dome ribs and lead to a single stair to the roof hatch on the widow's walk surrounding the lantern.

A) An NPS mechanical lift in the North Wing cannot be used to move heavy items between the first and third levels. A method of moving items while protecting the stairs, floors, walls and trim throughout the building is required. The structural engineer has determined allowable load paths through the building on Sheet S‐206 but it is not complete.

B) All existing decorative and structural cast and wrought iron beams in the ceilings and dome are to be protected. All are early progressive examples and are historically important cultural resources.

C) There are very few cast iron beamed buildings in existence due to the small window of time they were manufactured and structural capacity is limited due to tendency to fracture under stress.

D) No fasteners that could possibly damage the cast iron may be utilized. Alternatives such as clamping will be an option. In any case, methods of fastening that are reversible is the goal.

Reference Tech Notes:

Temporary Protection #1:

Temporary Protection of Historic Stairways During Rehabiliation Work AND: Temporary Protection #2:

Specifying Temporary Protection of Historic Interiors During Construction and Repair

Refer to Construction Documents for Scope NPS archeology/historic consult req'd w/ C.O.

Gateway Arch National Park ‐ National Park Service Page 8 of 61 ‐ 8/3/2022

Item No.

Item Description Images Reason for Impact Quantity of Potential Impact Design Decisions

(Proposed Mitigation) NPS Construction Notes

SP‐08

Period Significant plaster, Reproduction Plaster, wood lath or pre‐1940 lath & early wood framing: It can be assumed plaster dating from before the 1940's may contains layers of early stenciling and paint scemes throughout the history of the Old Courthouse so therefore should be protected as much as possible. During the 1940's, following a significant fire in the building, the NPS removed much of the original wood lath, plaster and wood framing to remove the damaged material, initiate an effort to remove all concealed flammable material and install the new radiator piping and conduit. Many ceilings were replaced with metal lath and very hard plaster supported by steel clamps on the cast iron beams with hangers and a C‐ channel grid. New walls installed at this time were steel open web studs with metal lath and the same very hard plaster. Some of this plaster contains asbestos. Four recent test reports are availabe from 2002, 2014, 2019 and 2020.

In the Old Courthouse, metal lath does not necessarily indicate post Period of Significance work. Early alteration drawings from as early as 1909 note metal lath. Therefore, careful attention must be made and referral to early drawings will be necessary to date walls proposed for openings if they have not already been identified in the construction drawings or the Historic Preservation Plan as questions or possibly modifications arise in the field.

Ghost markings on the walls are records of early removed historic stairs and earlier walls. These visual indications of earlier features are to be preserved.

The site will be controlled by the contractor during construction. Installation of a hydraulic elevator will involve drilling equipment in the building, HVAC materials and install, fire protection systems materials and install, electrical and plumbing upgrades will take place in the building, galleries, corridors and in the rotunda. The piping for the existing steam radiators, installed in the 1940's are located above the ceiling lowered at that time.

This will necessitate the removal of most of the 1940's heavy plaster ceilings in the building which are attached, at the perimeter, to historic plastered walls. Some plaster contains asbestos and lead paint. There will also be holes drilled throughout the building for piping.

Images at left:

Top: Wood framing in the dome's interstitial space.

2nd: Plaster with early graffiti is to be protected and no writing or etching will be allowed on the walls.

3rd: Wood lath plaster vs. metal lath. Metal lath plaster was used in the building as early as 1909 so some may date to the Period of Significance, 1839‐ 1940.

4th: Section thru the South transept, timber framing supports the 2nd floor.

5th: 2nd floor wood framing in the south transept corridor seen above Corridor Rm. #119.

6th: Blow up of timbers to be protected above Rms. #120, #120B & #125.

7th: Untouched plaster with historical information above #120 & #120B. This same condition exists in other Rooms, this will be damaged if ceilings are removed all the way to the walls.

8th: Timbers above Rms. #120 & #120B 9th: Stacked timber framing above the ceiling of the 1st floor of the Rotunda blocks passage of new work between the structural bays.

10th: The ceilings of 2nd and 3rd floor Rotunda and the North Corridor (#110) is attached directly to wood framing, fire suppression piping must be exposed and run in a concealed or non‐obvious location below the ceiling or avoided.

The potential of adverse effects pertaining to this topic applies to the entire building, since work will occur in all these spaces.

Images Far Left:

Left: Location where a 1941 hose cabinet was removed in 2009 at the western end of the East wing corridor (#116).

Right: Fragments of plaster from this location with early paint schemes and stenciling.

1.) No hot work or cutting will be allowed in spaces that cannot be properly protected such as interstitial spaces. Any hot work or cutting will require approval.

2.) All period significant plaster will be protected and options for fastening, penetrating or adhering to period significant plaster will be rejected if another option to preserve the plaster or reduce the damage is available. All plaster on masonry walls is most likely from the Period of Significance (pre‐ 1940) and contains decorative paint information. Existing historic murals and graffiti are to be left intact and unmarred by the new work with protections put in place.

3.) Existing 1940's brackets and possibly C‐channel grids attached to the cast iron beams will be left in place and re‐used where possible. Earlier historical remnants such as wood wedges and strapping and where plenum spaces still contain plaster in an earlier condition will be preserved in place. Methods such as leaving a perimeter of the 1940's ceiling so as not to disturb the historic plaster may be considered.

4.) Historic grafitti and early evidence of walls and staircases are to be preserved and no marring or writing on the walls is allowed.

Tech Notes Temporary Protection #2: Specifying Temporary Protection of Historic Interiors During Construction and Repair must be applied.

Refer to Construction Documents for Scope NPS archeology/historic consult req'd w/ C.O.

Gateway Arch National Park ‐ National Park Service Page 9 of 61 ‐ 8/3/2022

Item No.

Item Description Images Reason for Impact Quantity of Potential Impact Design Decisions

(Proposed Mitigation) NPS Construction Notes

The contractor must proceed carefully at these locations and allow archeologists to determine when overight is necessary. See items E‐01 thru E‐04, FP‐02 and FP‐ 03 for more information on specific items referenced in this section Images below:

Top: Drawing in NPS archives dating to 1899 showing the stairs that were once located at the south Stair Hall (#121) to the SW courtyard. In the highlighted site plan to the left, this stair was located at the area shown in orange.

Bottom: Photo of the cast iron stair at the North Stair Hall (#108) to the NW courtyard. No photos exist of the SW stairs but they were stone.

Archeology & Artifacts: No soil disturbances can occur without informing NPS archeologist for possible monitoring and in some cases there may be architectural oversight. This will be an ongoing dialog during construction to protect the cultural resource and required by federal preservation laws. All efforts to avoid soil disturbances and historically important building elements known were implemented into the project and approved through the Section 106 process. Exterior excavations are planned in the NW and SW courtyards and interior west and south basements, locations were gps scanned in October of 2020.

The proposed interior work will require that the remains of historic public toilet stalls in Room #009 in the west wing basement, renovated in 1910, be excavated for an intercept pit for the new electrical service. The earliest facilities here date to 1844 and used cast iron vessels until 1856 when the first sewer connection was made. Excavations are also required in the west basement and crosshall (#012 to #014) and the south basement (#048, #49 and #050) for drains and the north transept for an elevator pit under Room #107. Current known excavation locations include but may not be limited to:

1. Ameren vault at northwest sidewalk & directional bore to west wing basement. The Ameren vault will measure 10'x54', a direction bore of 15" in diameter to begin here. 2. Exploratory pit against fence and north moat of west wing. This is required to determine the depth of directional bore prior to entering for 2' min. under the foudation. 3. Intercept pit under the concrete floor in Room #009. This is the end of the 12‐14" diameter directional bore from the Ameren vault, it will be approx. 8'x12'.

4. Chiller pad construction: The slab and 30" turned down footing will require excavation. 5. Chiller railing piers: These are spec'd at 3'‐0" deep. 6. Trenching from the chiller pad to subterranean entrance into South Wing basement Rms #049 and #048. The work will bring backup and normal power to the fire pump and possibly other electrical needs. Existing concrete window wells will need to be protected, date unknown. 7.

Underground fuel tank at west end of south moat west wing.

8. New fire protection 8" water line and vault. The new vault will be approximately 6'‐5" x 7'' at the SW sidewalk. 9. New fire protection water line trench with post indicator valve. This will connect the vault to South Wing room #048. 10. Elevator pit excavation in North Transept Room #107. GPS scans found a strong diagonal feature running near or through the SE corner of the anticipated elevator location, refer to 2020 report.

The Old Courthouse needs a fire suppression system, modern HVAC, electric and plumbing upgrades along with accessibility to include an elevator to the 2nd floor. Excavations and directional borings in the western courtyards, west and south basements and the north transept will be necessary.

Images at left: Top: Location at the NW sidewalk for the new Ameren vault. 2nd: Extensive GPS scans and conductivity and magnetic susceptibility surveys were completed by MWAC in Oct. 2020.

3rd: Air knife project in Sept. 2020 to identify depth of the west wing foundation. 4th: View of Room #009 in west wing basement where intercept pit and Ameren switch box will be located. 5th: Detail dated 11/16/1894 showing iron vessel and earlier public toilet partition.

Bottom: Location at the SW sidewalk for the new 8" fire protection water line vault.

Images at right:

Top: Merged drawings with overlays in yellow showing proposed directional bores and approximate excavation locations on the site and in the building, Sheets C‐100, E‐200, A‐200 & A‐

201. From Top: 1. Ameren vault . 2. NW courtyard bore with exploratory trench pit at fence and north side of west wing north moat wall, both to verify depth of foundations for bore. 3. Excavation in west basement Room #009 for interceptor pit for new switch box. 4. To right, proposed elevator location excavation in Room #107. 5. Excavation for drain (#012 to #014) 6. New generator pad extension. 7. To left, location of new fuel tank. 8.

Chiller pad construction & railing piers in SW courtyard, the orange area may contain remains of 19th century staircase. 9. Exterior trench to Rms.

#048 & #049 south basement. 10. To right, excavations for drains in south bsmnt. 11. New fire line and fire line vault.

Middle: Enlarged plan of elevator area Sheet AD‐ 202.

Bottom: Detail 3/A‐111 showing depth of chiller pads and perimeter railing structure proposed.

SP‐09

Refer to Construction Documents for Scope NPS archeology/historic consult req'd w/ C.O.

Gateway Arch National Park ‐ National Park Service Page 10 of 61 ‐ 8/3/2022

Item No.

Item Description Images Reason for Impact Quantity of Potential Impact Design Decisions

(Proposed Mitigation) NPS Construction Notes

There are multiple items that may be left in the building. If they are able to be moved, they will be located in areas most convenient for the contractor.

All items to remain will be protected in place. If they are moveable and protection is better in another location, they can be moved accordingly.

In relation to the Joe Jones mural, it is requested that when the ceiling in Room #236 and partial walls in Room #231 are removed, the connection to the west wall be left intact until it is confirmed that the mural no longer exists.

SP‐10

Miscellaneous Loose Items to be left in the Building & Protected: There are various items that will be left in the building throughout the renovation and are required to be protected.

* The reproduction Bar/ Courtroom railing in the West Gallery, South Wing Room #124.

* The Bally Building in the North Wing 3rd floor east side, installed sometime after 1999 (Rm. #312). This structure will eventually be removed and re‐used at another park.

* A large safe that has been in the North Basement hallway (#019) since before NPS acquired the building. It dates to the Period of Significance (POS). It says "SHERIFF'S OFFICE" on it, the City of St. Louis Sherriff's office was located in the North Wing.

* Coal Chute remnants in the South Basement (Rm. #038). The door between #038 and #041 still has coal deposits that once fueled the old boiler.

* Wrought Iron roof framing remnants in the walls of the attic spaces

* Iron railing sections from the south sides of the east and west porticos.

* Wood door hung on wall in South Basement Rm. #040.

* A Joe Jones mural may still partially exist on the east wall of Room #236 under layers of paint and could extend above the lowered ceiling into the attic. The artist taught at the Old Courthouse with the St.