NCPC File #: 6541 Harry S Truman Building (DoS Headquarters) Perimeter Security Improvements
2201 C Street, NW
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United States Department of State
Final Site and Building Plans Project Information
Commission meeting date: September 8, 2016 NCPC review authority: Federal Projects in the District 40 U.S.C. § 8722(b)(1) and (d) Applicant request: Final approval of site and building plans Delegated / consent / open / executive session: Open NCPC Review Officer: Lee NCPC File number: 6541
Project summary: The United States Department of State (DOS) has submitted final site and building plans for the perimeter security improvements at the Harry S Truman (HST) Building, located at 2201 C Street, NW. The Commission reviewed and approved the preliminary site and building plans at its October 1, 2015 meeting, the current submission addresses previous comments and develops further the stormwater management and landscape plan, refines the pocket park design and includes materials selection for hardscape, streetscape and the exterior of the D Street pavilion. The applicant has continued the extensive coordination process with different government agencies and the end result is an improved project that will set an example of sustainability while improving the public space and addressing strict perimeter security requirements.
The HST Building is the 2.5 million square-foot headquarters of the DOS, located on an 11.8-acre site. The site is bounded by 21st Street to the east, C Street to the south, 23rd Street to the west, D Street, the E Street Expressway ramp and Virginia Avenue to the north. The HST building was constructed in two separate phases, almost twenty years apart. The original portion, referred to as the “Marshall Wing,” was built in 1941 to serve the War Department and encompasses the northeast quadrant of the HST Building.A significant L-shaped building expansion was completed in 1960. The expansion, referred to as the “New State,” occupies the remainder of the four-square-block site and wraps around the original building. The HST building is eligible for the National Register of Historic Places and is a contributing element to the Northwest Rectangle Historic District. The American Pharmacist Association and the National Academy of Sciences are located directly to the south; the Old Naval Observatory is located to the west; the Federal Reserve Martin Building is located to the east; the Pan American Health Organization and the Retired Foreign Services Officers Club are located to the north. The site is located within close proximity to George Washington University Campus, and adjacent to the National Mall.
2 Project Information
Project summary continued:
As an Interagency Security Committee (ISC) Level V building, the HST building requires an increased level of protection. The plan’s objectives are to secure the building, protect employees and visitors, and improve the streetscape by creating an attractive environment for pedestrians. The project entails relocating employee and visitor screening from the interior of the building to new security pavilions at four of the building entrances; providing guard booths for vehicular security screening; increasing the sidewalk width; developing a protective barrier system; relocating the existing truck inspection facility; realigning curbs to address vehicular standoff distances and significant landscape improvements, including low impact development (LID) features. The proposed perimeter security will replace temporary security barriers with permanent security measures to enhance the aesthetic appearance and pedestrian environment consistent with the civic character of the context.
The construction of the perimeter security improvements will be implemented in two phases. NCPC is reviewing final plans for Phase I of the project, which consists of a 5,100 square-foot security pavilion along D Street, and perimeter site improvements along D, 21st, C, 22nd and 23rd Streets. Phase II, which will be submitted at a future date, includes additional security pavilions along 23rd, C, and 21st Streets, and restoration of adjacent lobbies to their original condition.
3 Site Location
4 Historic District Boundaries and Contributing Elements
5 Existing Conditions
6 Existing Conditions
7 Existing Conditions – D Street Entrance
8 Proposed Phasing Plan
9 Proposed Site Plan
10 LID Scheme Plan
11 Preliminary Submission LID Section – Tree Root Path
“Ensure sufficient planting space for proposed and mature trees by evaluating the placement of security element foundations within planting areas in an effort to maintain healthy root systems.” 12 Final Submission LID Section – Tree Root Path
13 Bio retention and LID Precedent Photos
14 21st Street Plan and Elevation
15 21st Street Enlarged Plan
“Promote pedestrian flow by aligning bollards consistently with architectural elements to minimize disruption of pedestrian circulation and achieve a graceful transition between different security and architectural elements.”
16 21st Street Enlarged Plan
Preliminary Submission - Jogger’s Entrance / 21st Street Final Submission - Jogger’s Entrance / 21st Street
“Provide additional seating to enhance the pedestrian experience, including outside of the jogger’s entrance.”
17 21st Street Section – Diplomacy Center Entrance
18 21st Street Section – Flowering Trees and Rail
19 Preliminary Submission - 21st Street Diplomacy Center Entrance
“Further develop the design for the proposed benches, bollards and railings to ensure a seamless integration of streetscape and security elements.” 20 Final Submission 21st Street Diplomacy Center Entrance
21 21st Street Axonometric
22 C Street Plan and Elevation
23 C Street Section – Guard Entrance
24 C Street and 21st Street – Guard Booth Perspective
25 23rd Street Plan and Elevation
26 23rd Street – Typical Plan Enlargement
27 23rd Street – Sections
23rd Section – Rail and Bench 23rd Section – Bump out wall and bench
28 23rd Street – Streetscape Axonometric
29 D Street – Plan and Elevations
30 D Street – Pocket Park
Benches Benches Bicycle Rack
D Street Stone-clad Stone Veneer Wall Wall
Preliminary Submission Final Submission Pocket Park Enlarged Plan – D and 23rd Street Intersection Pocket Park Enlarged Plan – D and 23rd Street Intersection
“Explore a more interesting and intimate seating arrangement, and consider relocating the bicycle rack in order to make the corner more visible and inviting, and Explore an alternative security treatment around the northwest planting area to avoid redundant layers of solid walls that obstruct visibility.” 31 D Street – Pocket Park
32 Preliminary Submission - D Street – Pocket Park
33 Final Submission - D Street – Pocket Park
34 D Street Section - Pocket Park
35 D Street Section – Truck Inspection Area
36 D Street Entrance Demolition
37 D Street Pavilion Floor Plan
38 D Street Pavilion Elevations and Sections
39 D Street Pavilion Perspective - Preliminary
40 D Street Pavilion Perspective - Final
41 Guard Booths
42 Security Elements Diagram
43 Typical Bollard Layout
44 Typical Bollard and Rail Layout
45 Typical Wall Layout
46 Existing Amenities - Benches
47 Proposed Amenities - Benches
48 Existing Amenities – Bike Racks
49 Proposed Amenities – Bike Racks
50 Proposed Amenities – Pocket Park
51 Planting Diagram – Trees to remain and remove
52 Planting Diagram – Proposed Trees
53 Tree Context Diagram – Existing
54 Tree Context Diagram – Existing and Proposed
elms Swamp white oaks
Willow oaks
55 Planting Images – Trees
56 Planting Images – Trees
57 Planting Images – Shrubs and Groundcovers
58