McNichols Civic Center Building City & County of Denver Proposed New Terrace and South Facade Rehabilitation Denver, Colorado

Transcription

1 McNichols Civic Center Building City & County of Denver Proposed New Terrace and South Facade Rehabilitation Denver, Colorado Denver Landmark Preservation Commission Infill Mass & Scale Submittal 04 September 2018

2 Excerpt from Civic Center Design Guidelines: Allow the use of new contemporary materials complementing the Park s original materials and compatible with the neoclassical design. Acceptable primary materials for 3-dimensional features such as walls, columns or structure are: Turkey Creek sandstone, granite, Civic Center concrete, steel, bronze, copper or painted aluminum, or glass used in conjunction with other primary materials. Acceptable materials for paving are Civic Center concrete, granite, brick insets and crusher fines. Table of Contents

3 Goals of the Project Further activate the McNichols Civic Center Building to reinforce the civic nature and importance of Civic Center. Enhance the building s mission of serving as an arts and community events center in Denver. Reinforce the building s need to be universally accessible to all users. Provide a stronger connection to Civic Center Park. Respect and honor the architecture of the former Carnegie Library in all rehabilitation initiatives. Project Goals

4 Design Statement The McNichols Civic Center building was constructed in 1908 as Denver s central Carnegie Library. It served in this capacity until the mid 1950s when the Temple Buell library building was built across 14th Avenue from Civic Center Park. The McNichols building featured stone and brick masonry and stood as the only structure in Civic Center Park when the park was originally constructed. In the mid 1950s, as part of the building s transformation into the offices of the Denver Water Board, the building sustained several losses. The south facade was heavily modified with infilled original window openings, replacement windows, removal of original stone masonry and removal of skylights. In 2009, the Civic Center Design Guidelines were written and adopted by the City and County of Denver as a supplement to Denver s Civic Center Master Plan adopted in The Design Guidelines encouraged that the McNichols Building be rehabilitated to serve as an active public facility, supporting Park activities and as a catalyst for civic endeavors. In 2014, the McNichols Phase II improvements were completed to create a community arts and events venue that addressed this recommendation. Work of Phase I and Phase II, previously approved by the DLPC included window replacement, entry courtyard, interior improvements, and exterior restoration of the frieze. The guidelines further encourage Allow(ing) modifications to the south facade of the McNichols Building to improve its physical and visual connection to Civic Center. This proposal addresses this recommendation as further development of the active community building that McNichols has become. footage. The second floor is an exterior terrace that provides for additional event space accessed from the grand event space. Parking will be minimized on the south side of the building to service and delivery spaces. The proposed design also addresses the previous modifications to the south facade. The original window openings and replacement windows will be re-opened with replica original windows similar to those installed in the rest of the building. The stone band at the second level will be re-established. The third floor windows will be operable with glass railings at the interior to allow for an indoor-outdoor experience. The former southern skylight over the stacks will be re-established in size and configuration and utilizing modern glazing materials for light control. The masonry chimneys on either side of the stacks will be extended to their original height. The design team held meetings with various public groups to discuss the proposed terrace and south facade design. The proposed project was presented to Historic Denver, History Colorado, the Civic Center Conservancy and the Golden Triangle Creative District. Overall, the design was well received and the feedback from the public has been incorporated into the design. Careful consideration has been given to a design that is connected to the park, yet subordinate to the original building. Security concerns were addressed by the inclusion of glass gates that can secure the stairs without visually cutting the space off from the park. Inspired by the great civic architecture of Civic Center, it is recognizably a product of our own times, but without being jarring or disruptive in relation to the original composition and materiality of the McNichols building. The proposed terrace is located on the south facade and is accessed below from the first floor and on the exterior from the second floor. The terrace is constructed of masonry and glass and provides approximately 1,400 square feet. Stairs lead down on each side of the terrace towards the park. The terrace extends to the property line on the south and aligns with the former stacks portion of the building. The lower level will contain utilities, trash and recycling facilities as well as usable meeting space added onto the first floor square Design Statement

5 Compliance with Civic Center Design Guidelines V. General Park Guidelines b. Connectivity and Park Composition b.1. Activity Nodes Guidelines: 1. Encourage park activity within Civic Center at key activity nodes (includes McNichols Building) 2. Provide physical infrastructure improvements within Civic Center to support and encourage activity. Ensure new improvements are compatible with Park s architectural and historical significance 5. Encourage public gatherings supporting the civic role of Civic Center and reinforcing its importance as Denver s primary public gathering space. f. Materials Guidelines: 1. Continue the Beaux Arts tradition by using materials compatible with the Park s neoclassical design. 2. Allow the use of new contemporary materials complementing the Park s original materials and compatible with the neoclassical design Acceptable primary materials for 3-dimensional features such as walls, columns or structure are: Turkey Creek sandstone, granite, civic center concrete, steel, bronze, copper of painted aluminum, or glass used in conjunction with other primary materials. Acceptable materials for paving are Civic Center concrete, granite, brick insets and crusher fines.. VI. McNichols Civic Center Building (Carnegie Library) 1909 by Albert Ross, Architect b. Standards: 1. Rehabilitation shall be the primary approach 2. Preserve and rehabilitate the exterior of the building using accepted preservation practices. 4. If changes are made to the area immediately south of the McNichols Building, replace the parking lot with a new park use. Encourage a new use that serves the Park and is compatible with the Park s and the McNichols Building s historic character. c. Guidelines: 1. Encourage the adaptive reuse of the McNichols Building to reestablish its role as a civic building with uses that support and enliven Civic Center. Encourage new uses that create an active facility. Encourage the additional of accessible routes, ensuring the design is compatible with the historic character of the building and the Park. 2. Allow modifications to the south facade of the McNichols Building to improve its physical and visual connection to Civic Center Allow fenestration modifications to the south facade that respect the pattern, dimension, and scale of the original windows and doors. Allow modifications for a new transitional feature to the south facade in the Primary Area of Influence. Vertical scale should not exceed the architectural scale. The Primary Area of Influence for the transitional feature is the area between the east-west walk and the building s south facade (approximately 40 feet in width) and extends the length of the building. 4. For new elements, use materials compatible with the building s neoclassical design and its original materials. Acceptable primary materials for 3-dimensional features, such as walls, columns or structures are: Turkey creek sandstone or substitute, compatible granite, and Civic Center concrete. Acceptable secondary materials or bronze, steel or painted steel when used with a primary material, and glass in conjunction with other primary materials. Design Guidelines Compliance

6 DENVER LANDMARKS SUBMITTAL

7 DENVER LANDMARKS SUBMITTAL

8 DENVER LANDMARKS SUBMITTAL

9 DENVER LANDMARKS SUBMITTAL

10 DENVER LANDMARKS SUBMITTAL

11 DENVER LANDMARKS SUBMITTAL

12 DENVER LANDMARKS SUBMITTAL

13 DENVER LANDMARKS SUBMITTAL

14 Service Elevator 219 Machine Room 008 Storage 006 Storage 007 Stor. 005 Corridor 002 Hatched area denotes unoccupiable space Mechanical Room 004 IT 003 Tunnel to the City & County Building Electrical Room Basement Floor Plan - No new work anticipated 1/16" = 1'-0" 0' 8' 16' 32' N DENVER LANDMARKS SUBMITTAL

15 Line of roof above. Elevator 158 Office 123 Office 156 Office 157 Entry 155 Meeting Room 141 Side Room 142 REF. Administration 140 DN Kitchen 138 Elevator 154 Office 122 RR 143 RR 151 (E) Trash area to be removed. RR 153 RR 152 Remove (E) walls & pilasters Remove (E) windows, typ. south wall (E) vents to be removed. (E) Parking spaces to be removed N 1 Level 1 Demo Plan 1/16" = 1'-0" 0' 8' 16' 32' DENVER LANDMARKS SUBMITTAL

16 Line of roof above. Elevator 158 Office 123 Office 156 Office 157 Entry 155 Meeting Room 141 Side Room 142 REF. Administration 140 DN Kitchen 138 Elevator 154 Office 122 RR 143 RR 151 RR 153 RR 152 Service area and parking (3 spaces) Relocated signage New concrete flatwork Trash/Recycling 149 Storage/Extra 144 Storage 147 New concrete flatwork Proposed Addition N 1 Level 1 Floor Plan 1/16" = 1'-0" 0' 8' 16' 32' DENVER LANDMARKS SUBMITTAL

17 DN 7 DN DN FD FD 1 Remove (E) walls & pilasters 6' - 10" 6' - 10" Remove (E) windows, typ. south wall N 1 Level 2 Demo Plan 1/16" = 1'-0" 0' 8' 16' 32' DENVER LANDMARKS SUBMITTAL

18 Belvedere Elevator 136 Foyer 135 DN (E) Steam Pipes DN Bride's Room 126 Main Room 128 DN RR 125 FD FD Elevator 134 RR 124 Patio 133 Assembly - Unconcentrated 15 sf / occ 95 occupants Allowable extents of south transitional element, per Design Guidelines Proposed Addition N 1 Level 2 Floor Plan 1/16" = 1'-0" 0' 8' 16' 32' DENVER LANDMARKS SUBMITTAL

19 Elevator Foyer 162 DN DN Main Room 159 DN FD FD Elevator 164 RR 161 RR 160 Reconstructed skylights above Remove (E) infill and provide new french doors and guard rails between pilasters N 1 Level 3 Floor Plan 1/16" = 1'-0" 0' 8' 16' 32' DENVER LANDMARKS SUBMITTAL

20 Skylight Reconstructed stacks chimneys to recreate historic height 7' - 6" 41' - 8 1/2" 5' - 5 5/16" Canopy 13' - 6" 4' - 6" CIVIC CENTER SIDEWALK 104' - 4" SIDEWALK 103' - 61/2" LEVEL 1 100' - 0" 9' - 8" Allowable extents of south transitional element, per Design Guidelines 7' - 8" 7' - 10" 7' - 10" 7' - 10" 4' - 4" 4' - 4" 4' - 4" 3' - 0" 1 East Elevation 1/16" = 1'-0" 0' 8' 16' 32' DENVER LANDMARKS SUBMITTAL

21 Skylight Reconstructed stacks chimneys to recreate historic height 47' /8" 7' - 6" 4' - 6" 13' - 6" 3' - 0" 10' - 5 1/2" Canopy Terrace 6' /2" 9' - 8" 3' - 9" LEVEL 3 133' - 6" LEVEL 2 114' - 0" SIDEWALK 103' - 6 1/2" LEVEL 1 100' - 0" 1 West Elevation 1/16" = 1'-0" 0' 8' 16' 32' DENVER LANDMARKS SUBMITTAL

22 Remove (E) cap. Salvage for reuse. Remove (E) roofing in preparation for new skylight. Remove (E) nonhistoric windows Remove (E) infilled walls 6' - 10" 6' - 10" 2' - 0" LEVEL 3 133' - 6" 12' - 6" 10' - 6" 12' - 6" 10' - 6" LEVEL 2 114' - 0" CIVIC CENTER SIDEWALK 104' - 4" Demo (E) 6' - 10" 6' - 10" Demo (E) LEVEL 1 100' - 0" 1 South Elevation - Demo 1/16" = 1'-0" 0' 8' 16' 32' DENVER LANDMARKS SUBMITTAL

23 3' - 9" 2 9' - 8" Alternate South Elevation 1/16" = 1'-0" LEVEL 2 114' - 0" CIVIC CENTER SIDEWALK 104' - 4" Restored windows. Typ. ea side New windows Skylight 4' - 5" 4' - 5" 4' - 5" 4' - 5" 4' - 5" 4' - 5" 4' - 5" 4' - 5" 4' - 5" 4' - 5" 4' - 5" 4' - 5" 2' - 5" EQ 55' - 6" EQ 7' - 6" 4' - 6" 13' - 6" 3' - 0" 3' - 9" 9' - 9" 4' - 4" 1' - 4 1/8" 8' - 3" 8' - 1" 8' - 1" 2' - 0" 8' - 3" LEVEL 3 133' - 6" 9' - 8" 5' - 6" 6' - 6" Gate 2' - 0" 3' - 13/4" Masonry 3' - 9" 8' /2" 9' - 9" 6' - 03/4" 8' /2" 5' - 6" 4' - 4" 5' - 6" 4' - 4" 5' - 6" 4' - 4" 5' - 6" 4' - 4" 5' - 6" 1' - 0" 1' - 0" 1' - 0" 1' - 0" 1' - 0" 3' - 13/4" Glazing Masonry Gate 13' - 6" LEVEL 2 114' - 0" CIVIC CENTER SIDEWALK 104' - 4" LEVEL 1 100' - 0" 2 This Sheet 6 92' - 7 1/2" 1 South Elevation 1/16" = 1'-0" 0' 8' 16' 32' DENVER LANDMARKS SUBMITTAL

24 A BC D EF G New skylights to restore historicity T.O. ROOF 162' - 10" Canopy rack mounts secure glazing on canopy. C 1' - 1" L 6' - 61/2". (E) Columns New glass canopy 10" 1" 2 This Sheet 9 (E) Sidewalk LEVEL 3 133' - 6" New Level 1 area below terrace Extents of South Element per Design Guidelines LEVEL 2 114' - 0" LEVEL 1 100' - 0" 12' - 6" 6' - 0" 10" 5' - 8" V.I.F. Canopy welded to circular steel framework. Canopy framework mounted to steel plate and bolted to terrace floor. 10' - 7 1/2" Sub-Basement Tunnel SUB BASEMENT 82' - 0" 2 Canopy Preliminary Detail 1/4" = 1'-0" 1 North-South Section 1/16" = 1'-0" 0' 8' 16' 32' DENVER LANDMARKS SUBMITTAL

25 25 Proposed Addition DENVER LANDMARKS SUBMITTAL

26 DENVER LANDMARKS SUBMITTAL

27 DENVER LANDMARKS SUBMITTAL

28

29

30