Data center profile · Sterling (Dulles), Loudoun County, Virginia

Digital Dulles

Digital Realty's grid-powered, multi-tenant campus near Dulles Airport in Loudoun County, Virginia: 96 MW per building, operating since 2023 and now adding a seven-building expansion that the county is debating

Operating, expanding. The first building opened in 2023; Buildings 5 to 9 hold air permits. Digital Realty bought Blackstone's stake in Building 9 in June 2026; the seven-building Phase 3 survives under 2025 grandfathering that supervisors failed to rescind Oct. 6, 2026.
The site, Satellite image, Aug. 4, 2025
96 MW
IT capacity per building
Digital Realty filing for Building 9; campus-wide MW not disclosed
Up to 1 GW
campus potential (press)
press account: 14 buildings, six substations; 900 MW cited in 2023
780 MW
permitted backup diesel generators
260 units at 3 MW each; backup only, not supply
June 2026
Digital Realty bought out Blackstone's Building 9 interest
no dollar figure for Building 9 alone; the filing's total covers Manassas buildings too
OperatorDigital Realty (developer and manager); Blackstone joint venture holds Buildings 5, 6 and 8
CustomerMulti-tenant; Building 9 is 100% leased for 15 years to an unnamed investment-grade hyperscaler
Planned IT capacity1.0 GW at full build-out (our estimate)
First building in serviceIn service since 2023
Next stepDigital Realty expects two of the three buyout buildings to stabilize in the first half of 2027 and the third in the first half of 2028; the filing does not say which is Building 9
From orbit

The site from above

Satellite overview1
Satellite image, Aug. 4, 2025.
From orbit

The site

Satellite views of the same ground on Jan. 12, 2022 and Aug. 4, 2025. Drag to compare.

after
before
◀ Satellite image, Jan. 12, 2022Satellite image, Aug. 4, 2025 ▶
From orbit

The latest view

Latest clear view, Oct. 8, 2026. It comes from a lower-resolution satellite (10 m pixels), so buildings show as blocks of color, not detail. What we count on the Oct. 8, 2026 image:

The latest view
Lower-resolution satellite image, Oct. 8, 2026
Power

Power and the grid

Energized, size not disclosed

Sources on record, size not disclosed
Backup generators (emergency use, not a power supply)

Getting on the grid

Who supplies what, what it costs, and what is still not public.

  1. March 23, 2023
    First air permit for backup generators
    Virginia DEQ permits 120 large generators for Buildings 5 to 9. State agency · Oct. 2025
  2. Oct. 10, 2025
    Generator fleet doubled
    The consolidated state permit adds 140 units, taking the fleet to 260 generators and 780 MW of backup nameplate. see Permits
  3. Jan. 6, 2026
    Substation expansion before the Army Corps
    A permit modification asks to relocate and expand two substations and widen a transmission easement; comments closed Feb. 5, 2026 and no decision is on record. see Permits
  4. Not set
    Utility service agreement: not public
    No Dominion service or interconnection agreement for this campus appears in any public filing. News report · Oct. 2026

What is next door

campus0.65 km · 345 kV+ substation0.89 km · 345 kV+ line4.10 km · gas pipelinecampus0.65 km · 345 kV+ substation0.89 km · 345 kV+ line4.10 km · gas pipeline

Distances from mapped lines and plants. OpenStreetMap · Oct. 2026

Permits

Permits checklist

1 pending · 4 granted

Risks

What could slow it down

Money

Money on record

$236.5M
land price, 424 acres
airports authority board approved Sept. 18, 2018 State agency · Sept. 2018
$77M
gross proceeds from contributing three Dulles projects to the JV
Apr. 2025 SEC filing · June 2026
$1.23B cash + stock
Digital Realty price for Blackstone's 64% stakes
Dulles 9 and the Manassas JV together, closed June 30, 2026 SEC filing · June 2026
3.6%
annual rent escalator on the three buyout leases (Dulles 9 and Manassas together)
15-year terms, blended Aa3/AA- tenant credit across the three leases SEC filing · June 2026
$74.8M
Land purchase for Building 5, recorded Dec. 2024
Digital WL 2834 LLC to Digital Carver Dulles 5 LLC (county deed records) County deed records · Dec. 2024
Land assembly

No arm's-length land purchase by the campus company is in county records. 7 related-party transfers are shown greyed. Parcel counts come from the deed; acreage is not recorded.

+2 more
Timeline

What happened, and what is due

SitePaper trailConstructionPowerPermitsMoneyLegalUpcoming
  1. July 12, 2018
    Site Digital Realty signs a $236.5M deal to buy 424 acres of airport land State agency · Sept. 2018
  2. Sept. 18, 2018
    Permits Airports authority board approves the land sale State agency · Sept. 2018
  3. July 10, 2020
    Permits Army Corps publishes notice of the first wetlands permit for an 11-building campus State agency · July 2020
  4. March 23, 2023
    Permits Virginia issues the first air permit for backup generators at Buildings 5 to 9 State agency · Oct. 2025
  5. Dec. 7, 2023
    Money Digital Realty and Blackstone announce a joint venture for four campuses (about $7B) SEC filing · Dec. 2023
  6. March 18, 2025
    Permits Loudoun ends by-right data centers (7-2) but grandfathers pending applications (5-4) Local government · Sept. 2025
  7. Oct. 10, 2025
    Power Air permit expanded to 260 backup generators, 780 MW nameplate State agency · Oct. 2025
  8. Jan. 6, 2026
    Permits Army Corps notices a modification for two more buildings and larger substations State agency · Jan. 2026
  9. June 2026
    Money Digital Realty closes its purchase of Blackstone's stakes in the Dulles 9 and Brickyard joint ventures SEC filing · June 2026
  10. Sept. 15, 2026
    Permits Supervisors vote 7-1-1 to draft a 12-month pause on new legislative data-center applications; grandfathered projects like this one are not covered (press) News report · Sept. 2026
  11. Oct. 6, 2026
    Permits Supervisors table a bid to rescind grandfathering for 15 legacy projects including Phase 3 (press) News report · Oct. 2026
  12. Oct. 2026
    Permits Final county vote on the 12-month pause is scheduled News report · Sept. 2026
  13. June 2027
    Construction Building 9 expected to stabilize in the first half of 2027 or 2028 SEC filing · June 2026
Construction activity

Building activity by quarter

Since Jan. 2022: 44 FAA filings (April 2022 to Oct. 2026): tallest permanent commercial use building 60 ft (filed Aug. 2026) and tallest crane 347 ft (Dec. 2024); 70 satellite captures.

FAA filings
Satellite
’22
’23
’24
’25
’26
Dot size: records in the quarter, largest = 8. Two-digit years mark each first quarter.
The buildings

Specs

433 acres
original site, bought from the airports authority in 2018
State agency · July 2020
11 to 14 buildings
11 in the 2020 permit; developer now cites 14 (press)
News report · Oct. 2026
11.7M sq ft
campus total as billed (press); 7.8M sq ft after Phase 3 per county documents (press)
News report · Oct. 2026
648,500 sq ft
one operating building (IAD44)
Company · Oct. 2026
5 + 7 buildings
Buildings 5 to 9 permitted for generators; Phase 3 adds seven more (press)
News report · Oct. 2026
Other data centers within 40 km (254)
This campus (footprint)
48 ac
IAD101 Manassas Data Center
48 ac
LC Campus United States - Northern VA
46 ac
8190 Bethlehem Data Center
42 ac
Bethlehem Technology Park DC18 Data Ce
41 ac
IAD100 Manassas Data Center
41 ac
Who is involved

Owners, partners and builders

Owners
  • Digital Realty Trust: developer, manager and owner
  • Digital Western Lands, LLC: site owner and permit applicant
  • Blackstone: 80% partner in the joint venture at formation; sold out of Building 9 in June 2026, still holds Buildings 5, 6 and 8
Tenants
  • Building 9: one unnamed investment-grade hyperscale customer
  • Campus is marketed as multi-tenant; other tenants are not named in any source
Government
  • Metropolitan Washington Airports Authority: land seller (2018)
  • Loudoun County Board of Supervisors: land-use authority
  • Army Corps of Engineers (Norfolk) and Virginia DEQ: permitting
Power
  • Dominion Energy Virginia: electric utility
Still unknown

Open questions

Where this comes from

370 records from 41 documents

Drawn from state agency records, news reports, securities filings, public and commercial datasets, local government records, company statements and satellite captures, each kept with its date and source. The bar shows documents by type.

State agency 20News report 10SEC filing 6Dataset 3Local government 2Company 1Satellite 0
Evidence

Every quote behind this page

Grade key: A = the primary record itself (permit, filing, exhibit) · B = a dated official statement · C = news reporting. Map distances are our own measurements on OpenStreetMap and carry no grade. Allegations in lawsuits are marked as such in the quotes.

Power (31)
  • IT capacity: not stated
    “ABSENCE (checked): no campus-wide delivered or contracted IT MW is disclosed in any Digital Realty SEC filing opened (8-K Dec 2023, 8-K Jun 2026, 10-Q Q2 2026, 10-K Ex-21). DLR discloses development at market level only, so delivered campus IT”
    SEC filing · Oct. 2026 · grade A
  • Utility service: not stated
    “the orientation and footprint of the substations and transmission easement are dictated by utility provider requirements”
    State agency · Oct. 2026 · grade A
  • On-site generation: not stated
    “is authorized to construct and operate emergency and non-emergency engine gen-sets”
    State agency · Oct. 2026 · grade A
  • IT capacity: 96 MW
    “Blackstone's 50% interest in the Digital Dulles campus in Sterling, each with 96 megawatts of IT capacity”
    SEC filing · June 2026 · grade A
  • IT capacity: 96 MW
    “Blackstone 50% interest in the Digital Dulles campus in Sterling, each with 96 megawatts of IT capacity”
    SEC filing · June 2026 · grade A
  • Digital Realty / Blackstone joint venture portfolio context (NOT a Digital Dulles campus figure): the FY2025 10-K states the JV campuses are planned to support 10 data centers with approximately 500 MW of potential IT lo
    “The campuses are planned to support the construction of 10 data centers with approximately 500 megawatts of potential IT load capacity”
    SEC filing · Feb. 2026 · grade A
  • Power plan: grid via on-site substations (Dominion); diesel backup only; no on-site prime generation
    “construction of two additional data center buildings, relocation and expansion of two substations, expansion of an overhead electrical transmission easement”
    State agency · Feb. 2026 · grade A
  • The pending USACE modification (two more buildings; Substations #02 and #06 upsized per utility requirements; 119.3 acres additional tree clearing) shows the campus layout has outgrown the 2020 JPA's 11-building plan; Co
    “The Corps is continuing to evaluate the applicant avoidance and minimization measures and requested additional information on December 1, 2025”
    State agency · Feb. 2026 · grade A
  • Construction stage: operating expanding
    “construction of two additional data center buildings, relocation and expansion of two substations, expansion of an overhead electrical transmission easement”
    State agency · Jan. 2026 · grade A
  • Interconnection status: Operating and expanding in Dominion Energy territory, Loudoun County VA; the campus's federal permit modification noticed Jan 6, 2026 covers relocation and expansion of two substations and expansi
    “The applicant requests authorization to modify Corps Individual Permit NAO-2006-07410 for the Digital Dulles data center campus in Loudoun County, Virginia.”
    State agency · Jan. 2026 · grade A
  • large load interconnection request: Modification application noticed Jan. 6, 2026; comment period closed Feb. 5, 2026; issuance not confirmed at capture
    “Under the proposed modification, total impacts would be approximately 8.91 acres of wetlands and 441 linear feet of stream channel, including palustrine open water (POW).”
    State agency · Jan. 2026 · grade A
  • The Blackstone JV spans four campuses (Frankfurt, Paris, Northern Virginia) with ~500 MW potential IT capacity and ~$7B estimated development cost across 10 data centers - JV portfolio totals, NOT Digital Dulles figures; nev
    “The campuses are expected to support the construction of 10 data centers with approximately 500 megawatts of potential IT load capacity”
    SEC filing · Dec. 2023 · grade A
  • Announced: July 10, 2020
    “The applicant proposes to construct a large scale, phased, data center campus and substations at the subject location. The project is called Digital Dulles”
    State agency · July 2020 · grade A
  • Acres: 424 acres
    “Staff recommends that the Strategic Development Committee approve and recommend that the Board approve the Airports Authority sale of 424 acres to Digital Realty Trust, LP for $236.5M”
    State agency · Sept. 2018 · grade A
  • Land seller: Metropolitan Washington Airports Authority (MWAA)
    “RESOLVED, That the Board of Directors approve the Airports Authority sale of the Western Lands at Dulles International to Digital Realty Trust, LP for $236.5 million”
    State agency · Sept. 2018 · grade A
  • Nearest power line of 345 kV or more: 0.89 km
    Measured on OpenStreetMap map data.
    OpenStreetMap · Oct. 2026
  • Nearest substation of 345 kV or more: 0.65 km
    Measured on OpenStreetMap map data.
    OpenStreetMap · Oct. 2026
  • Nearest gas pipeline: 4.1 km
    Measured on OpenStreetMap map data.
    OpenStreetMap · Oct. 2026
  • Air registration: Digital Western Lands LLC holds an ICIS-Air record at 43704 Efficiency Drive, Sterling: Operating, 80% Synthetic Minor classification
    “DIGITAL WESTERN LANDS LLC | 43704 EFFICIENCY DRIVE | STERLING | Operating | 80% Synthetic Minor”
    State agency · Oct. 2026 · grade B
  • Jurisdiction: Loudoun County holds land-use authority: data centers were by-right (administrative approval) until Mar 18, 2025, and require a Board-approved special exception after that date; this campus's pending applic
    “The amendments make data centers a conditional use that now requires an approved special exception application by the Board of Supervisors. This eliminates data centers as a by-right use in the county”
    Local government · March 2025 · grade B
  • Stated campus size: 1,000 MW
    “Digital Realty has said the campus could total 14 buildings and up to 1GW of capacity via six substations”
    News report · Oct. 2026 · grade C
  • Buildings: 14
    “Digital Dulles could total 14 buildings and up to 1GW of capacity via six substations”
    News report · Oct. 2026 · grade C
  • Stated campus size: 1,000 MW
    “Digital Dulles could total 14 buildings and up to 1GW of capacity via six substations”
    News report · Oct. 2026 · grade C
  • Utility: Dominion Energy Virginia
    “relocation and expansion of two substations, expansion of an overhead electrical transmission easement”
    News report · Oct. 2026 · grade C
  • Phase3 buildings: 7
    “The largest is Digital Realty Digital Dulles Phase 3, a seven-building expansion near Dulles International Airport that would bring the existing campus to 7.8M SF”
    News report · Oct. 2026 · grade C
  • Sq ft after phase3: 7800000 sq ft
    “a seven-building expansion near Dulles International Airport that would bring the existing campus to 7.8M SF”
    News report · Oct. 2026 · grade C
  • Digital Western Lands LLC applied to the USACE Norfolk District to modify permit NAO-2006-07410 for the Digital Dulles campus: two additional data center buildings, relocation and expansion of two substations, and an exp
    “requesting to modify an existing permit to allow for the construction of two additional data center buildings, relocation and expansion of two substations”
    News report · Oct. 2026 · grade C
  • Grid operator: PJM
    “regional grid operator PJM directed utilities to prepare to cut power to data centers”
    News report · Sept. 2026 · grade C
  • Dominion Energy reported ~40 GW of data center capacity in various contracting stages as of Dec 2024 (26 GW substation-engineering LOAs, 5 GW construction LOAs, 9 GW ESAs) - utility-wide context for why no single campus
    “it has approximately 40GW in various stages of contracting as of December 2024”
    News report · Feb. 2025 · grade C
  • Stated campus size: 900 MW
    “CEO Andrew Power mentioned during an earnings call that there is potential for up to 900 megawatts of buildable capacity at Digital Dulles”
    News report · Nov. 2023 · grade C
  • Site area: 433 acres
    “The ‘Digital Dulles’ project would see the erection of several data centers and substations on the 433-acre property”
    News report · July 2019 · grade C
Money and contracts (37)
  • Hyperscale lease - Building 9: termination not disclosed
    “FINDING: the 8-K, Ex-99.1 and 10-Q state the lease term, escalators and tenant credit quality but disclose NO termination, cancellation or early-exit clause, and do not name the tenant”
    SEC filing · Oct. 2026 · grade A
  • Financing: Development funded in part through the Blackstone JV from 2024 (DLR 20% at formation; Dulles projects contributed Apr 2025 for ~$77M gross proceeds); DLR bought out the Dulles 9 and Brickyard JVs on Jun 30, 20
    “On June 30, 2026, the Company completed the acquisition of 64% blended partnership interests in the Digital Carver Dulles 9 JV, LLC and Digital Carver Brickyard JV, LLC joint ventures”
    SEC filing · June 2026 · grade A
  • JV contribution: contribution 77000000 USD gross proceeds
    “cash provided by the contribution of development projects at the Digital Dulles campus to the joint venture with Blackstone in April 2025, for gross proceeds of approximately $77 million”
    SEC filing · June 2026 · grade A
  • JV interest purchase agreement: closing
    “After closing, each of the joint ventures became a wholly owned subsidiary of the Operating Partnership”
    SEC filing · June 2026 · grade A
  • DLR recognized $201M of promote income at the buyout closing (incentive fees on the JV's total return) plus $14M promote expense under its 2025 Carried Interest Plan - the JV's Dulles/Brickyard assets had appreciated eno
    “the Company recognized $201 million of promote income, within Fee income and other and $14 million of promote expense”
    SEC filing · June 2026 · grade A
  • Tenants: Multi-tenant colocation campus; Building 9 is leased to a single unnamed investment-grade hyperscale customer
    “The portfolio comprises two data centers in Manassas and one on the Digital Dulles campus in Sterling, each with 96 megawatts of IT capacity, that are 100% leased to three distinct investment grade hyperscale customers”
    SEC filing · June 2026 · grade A
  • Tenant status: Building 9: 100% leased, 15-year term, 3.6% annual escalators, tenant credit blended Aa3/AA- across the three buyout leases; expansion (Phase 3) tenants unnamed in all sources
    “supported by 15-year leases with a blended average Aa3/AA- credit-rating and 3.6% annual rent escalators”
    SEC filing · June 2026 · grade A
  • JV interest purchase agreement: scope
    “the company entered into an agreement to purchase from affiliates of Blackstone Inc. all of Blackstone blended 64% interests in the Digital Carver Dulles 9 and Digital Carver Brickyard joint ventures”
    SEC filing · June 2026 · grade A
  • JV interest purchase agreement: consideration 1231000000 USD cash
    “for consideration consisting of $1,231 million in cash and a number of shares of the company non-voting common stock calculated by dividing $2,346,087,437.83 by the last reported sale price”
    SEC filing · June 2026 · grade A
  • JV interest purchase agreement: asset terms 7800000000 USD gross value at 100% share
    “at a gross value of $7.8 billion (including assumed debt and estimated remaining capital expenditures to complete the ongoing development), reflecting an estimated initial stabilized capitalization rate of over 6.5%”
    SEC filing · June 2026 · grade A
  • Hyperscale lease - Building 9: lease term 15 years
    “supported by 15-year leases with a blended average Aa3/AA- credit-rating and 3.6% annual rent escalators, that are expected to enhance the company growth”
    SEC filing · June 2026 · grade A
  • Hyperscale lease - Building 9: lease escalator 3.6 % per year
    “15-year leases with a blended average AA- customer credit rating and 3.6% annual rent escalators”
    SEC filing · June 2026 · grade A
  • Jv contribution 2025: 77 USD millions
    “In April 2025, we contributed an additional three development projects at the Digital Dulles campus to our joint venture with Blackstone. We received approximately $77 million of gross proceeds”
    SEC filing · Feb. 2026 · grade A
  • Water watershed: Broad Run watershed (Stallion Branch tributaries); authorized impacts 7.31 acres wetlands + 420 lf streams; pending modification adds 1.20 acres + 21 lf (totals 8.91 acres / 441 lf)
    “Under the proposed modification, total impacts would be approximately 8.91 acres of wetlands and 441 linear feet of stream channel”
    State agency · Feb. 2026 · grade A
  • Wetland/stream mitigation commitment: mitigation 2.28 wetland credits + 26 stream credits
    “the applicant proposes to purchase 2.28 wetland mitigation credits and 26 stream mitigation credits from an approved mitigation bank or from the Virginia Aquatic Resources Trust Fund”
    State agency · Feb. 2026 · grade A
  • Developer: Digital Realty (Digital Realty Trust, Inc. / Digital Realty Trust, L.P.)
    “Digital Realty and Blackstone Inc, and affiliated funds (together, Blackstone) entered into an agreement to establish a joint venture”
    SEC filing · Dec. 2023 · grade A
  • Operator: Digital Realty
    “will manage the development of the campuses and day-to-day operations of the joint venture, for which it will receive customary fees”
    SEC filing · Dec. 2023 · grade A
  • Joint venture formation agreement: scope 7000000000 USD est. total development cost (four campuses)
    “The four hyperscale data center campuses have a total estimated development cost of approximately $7 billion over the course of the next several years”
    SEC filing · Dec. 2023 · grade A
  • Joint venture formation agreement: ownership
    “Blackstone is expected to make initial capital contributions of approximately $700 million in the aggregate to acquire an 80% ownership interest in the joint venture. Digital Realty will contribute the properties to the joint venture, maintain a 20% interest”
    SEC filing · Dec. 2023 · grade A
  • Joint venture formation agreement: management
    “Digital Realty will contribute the properties to the joint venture, maintain a 20% interest in the joint venture and will manage the development of the campuses and day-to-day operations of the joint venture, for which it will receive customary fees”
    SEC filing · Dec. 2023 · grade A
  • Joint venture formation agreement: rofo
    “Digital Realty will grant Blackstone a right of first offer to make a similar investment in the development of additional data center capacity in Northern Virginia”
    SEC filing · Dec. 2023 · grade A
  • Joint venture formation agreement: closing condition
    “The joint venture is expected to close in two stages over the course of the first half of 2024. The closing of the joint venture is subject to certain regulatory and other approvals, as well as other customary closing conditions”
    SEC filing · Dec. 2023 · grade A
  • Land price: 236500000 USD
    “the Airports Authority and Digital Realty Trust, LP executed a Purchase and Sale Agreement for the Western Lands, dated July 12, 2018, with a purchase price of $236.5 million”
    State agency · Sept. 2018 · grade A
  • Land purchase and sale agreement: execution 236500000 USD
    “the Airports Authority and Digital Realty Trust, LP executed a Purchase and Sale Agreement for the Western Lands, dated July 12, 2018, with a purchase price of $236.5 million”
    State agency · Sept. 2018 · grade A
  • Land purchase and sale agreement: closing condition
    “Pursuant to the Purchase and Sale Agreement, closing on the property is contingent upon Board of Directors approval of the sale”
    State agency · Sept. 2018 · grade A
  • Land sale approval: execution 424 acres
    “RESOLVED, That the Board of Directors approve the Airports Authority sale of the Western Lands at Dulles International to Digital Realty Trust, LP for $236.5 million”
    State agency · Sept. 2018 · grade A
  • Land purchase (recorded deed): contract value USD
    “Recorded: April 4, 2025 · Grantor: DIGITAL WL 2834 LLC · Grantee: DIGITAL REALTY TRUST LP · Parcel number: 093-36-5404-002 · Address: 43705 EFFICIENCY DR · City: STERLING”
    County deed records · April 2025 · grade B
  • Land purchase (recorded deed): contract value USD
    “Recorded: April 4, 2025 · Grantor: DIGITAL WL 2834 LLC · Grantee: DIGITAL REALTY TRUST LP · Parcel number: 093-36-5404-005 · Address: 43714 EFFICIENCY DR · City: STERLING”
    County deed records · April 2025 · grade B
  • Land purchase (recorded deed): contract value USD
    “Recorded: April 4, 2025 · Grantor: DIGITAL WL 2834 LLC · Grantee: DIGITAL REALTY TRUST LP · Parcel number: 093-36-5404-004 · Address: 43715 EFFICIENCY DR · City: STERLING”
    County deed records · April 2025 · grade B
  • Land purchase (recorded deed): contract value USD
    “Recorded: April 4, 2025 · Grantor: DIGITAL REALTY TRUST LP · Grantee: DIGITAL CARVER DULLES 6 LLC · Parcel number: 093-36-5404-002 · Address: 43705 EFFICIENCY DR · City: STERLING”
    County deed records · April 2025 · grade B
  • Land purchase (recorded deed): contract value USD
    “Recorded: April 4, 2025 · Grantor: DIGITAL REALTY TRUST LP · Grantee: DIGITAL CARVER DULLES 8 LLC · Parcel number: 093-36-5404-004 · Address: 43715 EFFICIENCY DR · City: STERLING”
    County deed records · April 2025 · grade B
  • Land purchase (recorded deed): contract value USD
    “Recorded: April 4, 2025 · Grantor: DIGITAL REALTY TRUST LP · Grantee: DIGITAL CARVER DULLES 9 LLC · Parcel number: 093-36-5404-005 · Address: 43714 EFFICIENCY DR · City: STERLING”
    County deed records · April 2025 · grade B
  • Land purchase (recorded deed): contract value 74774106 USD
    “Recorded: Dec. 3, 2024 · Price: $74,774,106 · Grantor: DIGITAL WL 2834 LLC · Grantee: DIGITAL CARVER DULLES 5 LLC · Parcel number: 092-19-2834-000 · Address: 43704 EFFICIENCY DR · City: STERLING”
    County deed records · Dec. 2024 · grade B
  • Incentives: not stated
    “The second phase of the Data Center Standards & Locations project focuses on policy guidance and use-specific zoning standards for data centers and utility substations”
    Local government · Oct. 2026 · grade C
  • Electric service agreement (Dominion): esa status
    “Via its Digital Western Lands, LLC affiliate, Digital Realty has submitted an application with the U.S. Army Corps of Engineers Norfolk District to expand its Dulles Digital campus off Old Ox Road”
    News report · Oct. 2026 · grade C
  • Square feet: 11700000 sq ft
    “Originally set to total some 7.5 million sq ft across 425 acres, but since upped to 11.7 million sq ft”
    News report · Oct. 2026 · grade C
  • Square feet: 7460000 sq ft
    “One 524,000 square foot data center Six 645,000 square foot data centers Four 766,000 square foot data centers That works out to 7.46 million square feet of data centers”
    News report · July 2020 · grade C
Permits and government (75)
  • Aliases: Dulles Digital (USACE permit styling); Digital Western Lands campus; Western Lands (land name)
    “The applicant requests authorization to modify Corps Individual Permit NAO-2006-07410 for the Digital Dulles data center campus”
    State agency · Feb. 2026 · grade A
  • Section 404 permit modification: modification requested - public notice; comments closed Feb 5, 2026; decision pending
    “The proposed modification includes additional wetland and stream impacts associated with reconfiguration of previously approved site layouts, construction of two additional data center buildings, relocation and expansion of two substations”
    State agency · Feb. 2026 · grade A
  • Section 404 Individual Permit: Issued (existing permit; campus built and operating under it)
    “The applicant requests authorization to modify Corps Individual Permit NAO-2006-07410 for the Digital Dulles data center campus in Loudoun County, Virginia.”
    State agency · Jan. 2026 · grade A
  • permit type=large load interconnection request; the grid-relevant federal permit: Modification application noticed Jan. 6, 2026; comment period closed Feb. 5, 2026; issuance not confirmed at capture
    “Under the proposed modification, total impacts would be approximately 8.91 acres of wetlands and 441 linear feet of stream channel, including palustrine open water (POW).”
    State agency · Jan. 2026 · grade A
  • Buildings permitted air: 5
    “located at Buildings 5, 6, 7, 8, and 9 43695, 43704, 43705, 43714, and 43715 Efficiency Dr.”
    State agency · Oct. 2025 · grade A
  • Gensets nonemergency permitted: 260 units
    “(140) diesel-fired non-emergency engine gen-sets, consisting of Cummins Model C3000D6e (QSK95-G12 engine), Caterpillar Model 3516E, and/or Rehlko KD3000 (KD83V16 engine)”
    State agency · Oct. 2025 · grade A
  • Generator set nameplate capacity permitted: 780000 ekW
    “Maximum Rated Capacity (each) 3,000 ekW”
    State agency · Oct. 2025 · grade A
  • Gensets emergency permitted: 13 units
    “Five (5) diesel-fired emergency engine gen-sets, Cummins Model 1000DQFAD (QST30-G5 engine) and/or Caterpillar Model C32”
    State agency · Oct. 2025 · grade A
  • Construction stage: Operating + under continuous construction: first building delivered 2023; Buildings 5-9 genset-permitted 2023-2025; Building 9 (JV) still in development; USACE modification pending for two further bui
    “This permit supersedes your permit approval dated October 31, 2024”
    State agency · Oct. 2025 · grade A
  • Air permit: issued (original)
    “mNSR permit dated March 23, 2023, based on the permit application dated December 15, 2020”
    State agency · Oct. 2025 · grade A
  • Air permit: amended
    “This permit supersedes your permit approval dated October 31, 2024”
    State agency · Oct. 2025 · grade A
  • Air permit: issued (current consolidated permit)
    “is authorized to construct and operate emergency and non-emergency engine gen-sets located at Buildings 5, 6, 7, 8, and 9”
    State agency · Oct. 2025 · grade A
  • Air permit condition: operating limits - Condition 10
    “Each emergency diesel engine gen-set shall not operate more than 500 hours per year for all purposes (as provided in Condition 6) combined”
    State agency · Oct. 2025 · grade A
  • Air permit condition: operating limits - Conditions 6, 8, 9, 14
    “The emergency diesel engine gen-sets shall only be operated for the following purposes: a failure of the electrical grid; an Independent System Operator (ISO) declared emergency”
    State agency · Oct. 2025 · grade A
  • VA DEQ permits this campus's main backup fleet as NON-EMERGENCY engines (260 x 3,000 ekW, SCR+DOC, fuel-throughput caps instead of hour caps), with a small emergency PBB fleet capped at 500 hr/yr - the standard Virginia
    “(140) diesel-fired non-emergency engine gen-sets”
    State agency · Oct. 2025 · grade A
  • Loudoun County Board of Supervisors: Adopt CPAM-2024-0001 and ZOAM-2024-0001, Data Center Standards and Locations Phase 1
    “At the Board Business Meeting on March 18, 2025, the Board adopted (7-2: Kershner and Umstattd opposed) CPAM-2024-0001 and ZOAM-2024-0001, Data Center Standards and Locations Phase 1”
    Local government · Sept. 2025 · grade A
  • Loudoun County Board of Supervisors: Grandfathering Resolution for data center applications already under review
    “At the Board Business Meeting on March 18, 2025, the Board adopted (7-2: Kershner and Umstattd opposed) CPAM-2024-0001 and ZOAM-2024-0001, Data Center Standards and Locations Phase 1, and the Grandfathering Resolution (5-4: Briskman, Glass, TeKrony, and Saines opposed)”
    Local government · Sept. 2025 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “Map and spreadsheet uploaded. No prior ASN”
    FAA · May 2025 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “Hoisting Units to Roof of new IAD Building off of Old Ox Rd and Digital Dulles Drive.”
    FAA · May 2025 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “Use mobile cranes to erect the structural steel for a 2 story data center”
    FAA · April 2025 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “Use mobile cranes to erect the structural steel for a 2 story data center”
    FAA · April 2025 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “Use mobile cranes to erect the structural steel for a 2 story data center”
    FAA · April 2025 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “Use mobile cranes to erect the structural steel for a 2 story data center”
    FAA · April 2025 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “Hoisting Units to Roof of new IAD Building off of Old Ox Rd and Digital Dulles Drive.”
    FAA · April 2025 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “Hoist tilt walls piping and mechanical equipment”
    FAA · Feb. 2025 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “Hoist tilt walls piping and mechanical equipment”
    FAA · Feb. 2025 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “Hoist tilt walls piping and mechanical equipment”
    FAA · Feb. 2025 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “Hoist tilt walls piping and mechanical equipment”
    FAA · Feb. 2025 · grade A
  • FAA OE/AAA: Reminder
    “DLR Dulles IAD59 Building 8. Map and spreadsheet uploaded. Crane road filing upcoming separately”
    FAA · Jan. 2025 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “ASN 2024-AEA-13345-OE: Mobile Crane SE crnr 43700 blk Efficiency Dr, Mobile crane, 347 ft AGL, 637 ft AMSL, 38.95950833,-77.48988333, Determined - No Hazard, submitted 2024-12-04”
    FAA · Dec. 2024 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “ASN 2024-AEA-13346-OE: Mobile Crane NE crnr 43700 blk Efficiency Dr, Mobile crane, 347 ft AGL, 639 ft AMSL, 38.96273056,-77.49143889, Determined - No Hazard, submitted 2024-12-04”
    FAA · Dec. 2024 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “ASN 2024-AEA-13347-OE: Mobile Crane NW crnr 43700 blk Efficiency Dr, Mobile crane, 347 ft AGL, 641 ft AMSL, 38.96226389,-77.49291667, Determined - No Hazard, submitted 2024-12-04”
    FAA · Dec. 2024 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “ASN 2024-AEA-13348-OE: Mobile Crane SW crnr 43700 blk Efficiency Dr, Mobile crane, 347 ft AGL, 637 ft AMSL, 38.95904167,-77.49145, Determined - No Hazard, submitted 2024-12-04”
    FAA · Dec. 2024 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “ASN 2024-AEA-7578-OE: BZI Crane, Mobile crane, 180 ft AGL, 476 ft AMSL, 38.96362778,-77.49264167, Determined - No Hazard, submitted 2024-07-11”
    FAA · July 2024 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “ASN 2024-AEA-7579-OE: BZI Crane, Mobile crane, 180 ft AGL, 476 ft AMSL, 38.96250833,-77.49218611, Determined - No Hazard, submitted 2024-07-11”
    FAA · July 2024 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “ASN 2024-AEA-7580-OE: BZI Crane, Mobile crane, 180 ft AGL, 476 ft AMSL, 38.96387222,-77.49178889, Determined - No Hazard, submitted 2024-07-11”
    FAA · July 2024 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “ASN 2024-AEA-7581-OE: BZI Crane, Mobile crane, 180 ft AGL, 476 ft AMSL, 38.96275556,-77.49128056, Determined - No Hazard, submitted 2024-07-11”
    FAA · July 2024 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “ASN 2024-AEA-7219-OE: Mobile Crane SE Corner - 43714 Efficiency Dr., Mobile crane, 187 ft AGL, 475 ft AMSL, 38.96118611,-77.48842222, Determined - No Hazard, submitted 2024-07-01”
    FAA · July 2024 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “ASN 2024-AEA-7221-OE: Mobile Crane NW Corner - 43714 Efficiency Dr., Mobile crane, 187 ft AGL, 480 ft AMSL, 38.964,-77.49166944, Determined - No Hazard, submitted 2024-07-01”
    FAA · July 2024 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “ASN 2024-AEA-7222-OE: Mobile Crane SW Corner - 43714 Efficiency Dr., Mobile crane, 187 ft AGL, 477 ft AMSL, 38.96073333,-77.49005556, Determined - No Hazard, submitted 2024-07-01”
    FAA · July 2024 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “ASN 2024-AEA-7226-OE: Mobile Crane NE Corner - 43714 Efficiency Dr, Mobile crane, 187 ft AGL, 478 ft AMSL, 38.96448333,-77.490025, Determined - No Hazard, submitted 2024-07-01”
    FAA · July 2024 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “ASN 2024-AEA-6563-OE: Digital Dulles BLDG 9 SE corner, Building, 54 ft AGL, 351 ft AMSL, 38.96136667,-77.48872222, Determined - No Hazard, submitted 2024-06-12”
    FAA · June 2024 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “ASN 2024-AEA-6564-OE: Digital Dulles BLDG 9 NE corner, Building, 54 ft AGL, 351 ft AMSL, 38.96428056,-77.49018611, Determined - No Hazard, submitted 2024-06-12”
    FAA · June 2024 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “ASN 2024-AEA-6565-OE: Digital Dulles BLDG 9 NW corner, Building, 54 ft AGL, 351 ft AMSL, 38.96394167,-77.49129167, Determined - No Hazard, submitted 2024-06-12”
    FAA · June 2024 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “ASN 2024-AEA-6566-OE: Digital Dulles BLDG 9 SW corner, Building, 54 ft AGL, 351 ft AMSL, 38.96099444,-77.48993333, Determined - No Hazard, submitted 2024-06-12”
    FAA · June 2024 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “ASN 2023-AEA-14507-OE: Crane IAD44, Crane, 230 ft AGL, 527 ft AMSL, 38.9596,-77.49011389, Determined - No Hazard, submitted 2023-10-24”
    FAA · Oct. 2023 · grade A
  • FAA OE/AAA: Determined - No Hazard
    “ASN 2022-AEA-6478-OE: IAD 44 - Crane, Mobile crane, 220 ft AGL, 517 ft AMSL, 38.9596,-77.49011389, Determined - No Hazard, submitted 2022-04-15”
    FAA · April 2022 · grade A
  • First announced: 2020
    “The District Commander has received a joint application for Federal and State permits as described below: APPLICANT Digital Western Lands LLC”
    State agency · July 2020 · grade A
  • Section 404 / joint permit application: public notice of joint permit application
    “The applicant proposes to construct a large scale, phased, data center campus and substations at the subject location”
    State agency · July 2020 · grade A
  • Land control date: Sept. 18, 2018
    “closing on the property is contingent upon Board of Directors approval of the sale”
    State agency · Sept. 2018 · grade A
  • MWAA Board of Directors: Approve sale of 424 acres at Washington Dulles International Airport (Western Lands) to Digital Realty Trust, L.P.
    “Staff recommends that the Strategic Development Committee approve and recommend that the Board approve the Airports Authority sale of 424 acres to Digital Realty Trust, LP for $236.5M”
    State agency · Sept. 2018 · grade A
  • FAA dlr crane cases within 1p5km: 6 cases
    “2026-AEA-9532-OE DLR Dulles BLDG 6 -Steel Crane; 2026-AEA-9528-OE DLR Dulles BLDG 6; 2026-AEA-9530-OE DLR Dulles BLDG 6; 2026-AEA-9529-OE DLR Dulles BLDG 6”
    FAA · Oct. 2026 · grade B
  • Construction stormwater general permit coverage (VAR10): Coverage recorded in EPA ECHO
    “DIGITAL DULLES BUILDINGS 7 AND 9 | STERLING | VAR10P220”
    State agency · Oct. 2026 · grade B
  • FAA obstruction evaluation (7460-1): Studying
    “ASN 2026-AEA-12326-OE: 2292/202B Crane, Crane, 99 ft AGL, 392 ft AMSL, 38.95604,-77.49376, Studying, submitted 2026-10-15”
    FAA · Oct. 2026 · grade B
  • Tallest structure filed with the FAA (ft): 60 ft
    “ASN 2026-AEA-9917-OE: IAD48 Shell and PBB, Commercial Use Building, 60 ft AGL, 352 ft AMSL, 38.95680,-77.49099, Evaluating, submitted 2026-08-20”
    FAA · Aug. 2026 · grade B
  • FAA obstruction evaluation (7460-1): Evaluating
    “ASN 2026-AEA-9917-OE: IAD48 Shell and PBB, Commercial Use Building, 60 ft AGL, 352 ft AMSL, 38.95680,-77.49099, Evaluating, submitted 2026-08-20”
    FAA · Aug. 2026 · grade B
  • FAA obstruction evaluation (7460-1): Determined - No Hazard
    “ASN 2026-AEA-9529-OE: DLR Dulles BLDG 6, Crane, 200 ft AGL, 487 ft AMSL, 38.95934,-77.49002, Determined - No Hazard, submitted 2026-08-11”
    FAA · Aug. 2026 · grade B
  • FAA obstruction evaluation (7460-1): Determined - No Hazard
    “ASN 2026-AEA-9530-OE: DLR Dulles BLDG 6, Crane, 200 ft AGL, 489 ft AMSL, 38.95901,-77.49109, Determined - No Hazard, submitted 2026-08-11”
    FAA · Aug. 2026 · grade B
  • FAA obstruction evaluation (7460-1): Determined - No Hazard
    “ASN 2026-AEA-9528-OE: DLR Dulles BLDG 6, Crane, 200 ft AGL, 482 ft AMSL, 38.95739,-77.48904, Determined - No Hazard, submitted 2026-08-11”
    FAA · Aug. 2026 · grade B
  • FAA obstruction evaluation (7460-1): Determined - No Hazard
    “ASN 2026-AEA-9532-OE: DLR Dulles BLDG 6 -Steel Crane, Crane, 200 ft AGL, 486 ft AMSL, 38.95706,-77.49011, Determined - No Hazard, submitted 2026-08-11”
    FAA · Aug. 2026 · grade B
  • FAA obstruction evaluation (7460-1): Determined - No Hazard
    “ASN 2026-AEA-4022-OE: Mobile Crane 43705 Efficiency Dr, Crane, 187 ft AGL, 474 ft AMSL, 38.95939,-77.48992, Determined - No Hazard, submitted 2026-03-31”
    FAA · March 2026 · grade B
  • FAA obstruction evaluation (7460-1): Determined - No Hazard
    “ASN 2026-AEA-4023-OE: Mobile Crane 43705 Efficiency Dr NW, Crane, 187 ft AGL, 476 ft AMSL, 38.95896,-77.49130, Determined - No Hazard, submitted 2026-03-31”
    FAA · March 2026 · grade B
  • FAA obstruction evaluation (7460-1): Determined - No Hazard
    “ASN 2026-AEA-4025-OE: Mobile Crane 43705 Efficiency Dr SE, Crane, 187 ft AGL, 474 ft AMSL, 38.95736,-77.48889, Determined - No Hazard, submitted 2026-03-31”
    FAA · March 2026 · grade B
  • FAA obstruction evaluation (7460-1): Determined - No Hazard
    “ASN 2026-AEA-4024-OE: Mobile Crane 43705 Efficiency Dr SW, Crane, 187 ft AGL, 474 ft AMSL, 38.95692,-77.49022, Determined - No Hazard, submitted 2026-03-31”
    FAA · March 2026 · grade B
  • FAA obstruction evaluation (7460-1): Determined - No Hazard
    “ASN 2026-AEA-3960-OE: Temporary Fabcon Precast Crane, Crane, 150 ft AGL, 453 ft AMSL, 38.95898,-77.49674, Determined - No Hazard, submitted 2026-03-31”
    FAA · March 2026 · grade B
  • FAA obstruction evaluation (7460-1): Determined - No Hazard
    “ASN 2026-AEA-3588-OE: LTM 1150-5.3, Crane, 155 ft AGL, 455 ft AMSL, 38.95744,-77.49777, Determined - No Hazard, submitted 2026-03-17”
    FAA · March 2026 · grade B
  • FAA obstruction evaluation (7460-1): Determined - No Hazard
    “ASN 2026-AEA-776-OE: DLR 45 Suite 200, Stationary/Fixed Crane, 206 ft AGL, 494 ft AMSL, 38.96097,-77.48922, Determined - No Hazard, submitted 2026-01-26”
    FAA · Jan. 2026 · grade B
  • FAA obstruction evaluation (7460-1): Determined - No Hazard
    “ASN 2026-AEA-778-OE: DLR 45 Suite 225, Stationary/Fixed Crane, 307 ft AGL, 599 ft AMSL, 38.96418,-77.49081, Determined - No Hazard, submitted 2026-01-26”
    FAA · Jan. 2026 · grade B
  • FAA OE/AAA crane filings under the campus developer's own name and address evidence continuing vertical construction at the Digital Realty Digital Dulles campus (Sterling VA): four 'DLR Dulles BLDG 6' cranes (200 ft, 202
    “ASN 2026-AEA-776-OE: DLR 45 Suite 200, Stationary/Fixed Crane, 206 ft AGL, 494 ft AMSL, 38.96097,-77.48922, Determined - No Hazard, submitted 2026-01-26”
    FAA · Jan. 2026 · grade B
  • Grandfathering status: Digital Dulles Phase 3 is one of the grandfathered legacy applications - reported as the largest of the 15 - and continues through administrative (by-right) review; the Oct 6, 2026 Board item to re
    “If passed, the bill would effectively strip those 15 projects of their by right zoning approval”
    News report · Oct. 2026 · grade C
  • Land-use status: Phase 3 application grandfathered - continues by-right through administrative review
    “If passed, the bill would effectively strip those 15 projects of their by right zoning approval”
    News report · Oct. 2026 · grade C
  • Loudoun County is actively debating rescission of the 2025 grandfathering resolution and a 12-month pause on legislative data center/substation applications (final pause vote scheduled Oct 20, 2026). Grandfathered projec
    “The measure stalled Tuesday after supervisors tabled the discussion without a vote”
    News report · Oct. 2026 · grade C
  • Loudoun County Board of Supervisors: Feasibility of rescinding the 2025 grandfathering resolution (15-17 legacy projects incl. Digital Dulles Phase 3); outside-audit compromise also proposed
    “The measure stalled Tuesday after supervisors tabled the discussion without a vote amid little support beyond the bill sponsors”
    News report · Oct. 2026 · grade C
  • Loudoun County Board of Supervisors: Resolution of intent to pause new legislative data center and substation applications for up to 12 months; staff directed to draft; final vote scheduled Oct 20, 2026
    “supervisors voted 7-1-1 on 15 September to direct staff to draft a resolution pausing consideration of certain legislative data-centre and substation applications for up to 12 months”
    News report · Sept. 2026 · grade C
  • Loudoun County Board of Supervisors: Direct county attorney to return Oct 6 with a legal opinion on amending/ending the grandfathering resolution
    “the board voted unanimously Tuesday to obtain the attorney opinion on whether it is legal to roll back protections narrowly”
    News report · Sept. 2026 · grade C
Site and other (15)
  • Development status note: JV data centers under development; stabilization expected H1 2027 (two of three) and H1 2028 (third)
    “Two of the data centers are expected to stabilize in the first half of 2027”
    SEC filing · June 2026 · grade A
  • Current target date: JV Building 9 stabilizes in 1H 2027 or 1H 2028 (filing does not say which); aggregator framing: expansion deliveries phased from 2027 through 2031
    “Two of the data centers are expected to stabilize in the first half of 2027, with the third anticipated to stabilize in the first half of 2028”
    SEC filing · June 2026 · grade A
  • The 2026 buyout covered ONLY the Dulles 9 and Brickyard JVs. Carver stacks for Dulles Buildings 5, 6 and 8 remain in the Blackstone JV (DLR CIO: work continues across the remaining JV investments in Northern Virginia), s
    “we continue to work together across the remaining data center investments in our joint ventures in Northern Virginia, Paris and Frankfurt”
    SEC filing · June 2026 · grade A
  • Land owner entity: Digital Western Lands, LLC
    “Digital Realty/Digital Western Lands, LLC is authorized to construct and operate emergency and non-emergency engine gen-sets”
    State agency · Oct. 2025 · grade A
  • Address: Buildings 5, 6, 7, 8, and 9 - 43695, 43704, 43705, 43714, and 43715 Efficiency Dr, Sterling, VA 20166
    “located at Buildings 5, 6, 7, 8, and 9 43695, 43704, 43705, 43714, and 43715 Efficiency Dr. Sterling, Virginia 20166 (Loudoun County)”
    State agency · Oct. 2025 · grade A
  • County: Loudoun County, VA (FIPS 51107)
    “Sterling, Virginia 20166 (Loudoun County)”
    State agency · Oct. 2025 · grade A
  • expansion grandfathered by-right)
    “DEQ deemed the application complete on October 7, 2025”
    State agency · Oct. 2025 · grade A
  • Name: Digital Dulles
    “The project is called Digital Dulles”
    State agency · July 2020 · grade A
  • Location: Southeast of Old Ox Road (Route 606) and Beaver Meadow Road (Route 614), Sterling, Loudoun County, VA; Stallion Branch / Broad Run watershed
    “The project is located within the Stallion Branch watershed, on an approximately 433 acre parcel southeast of the intersection of Old Ox Road (Route 606) and Beaver Meadow Road (Route 614)”
    State agency · July 2020 · grade A
  • Acres: 433 acres
    “on an approximately 433 acre parcel southeast of the intersection of Old Ox Road (Route 606) and Beaver Meadow Road (Route 614)”
    State agency · July 2020 · grade A
  • Buildings: 11
    “The impacts are associated with eleven, two-story buildings and associated infrastructure”
    State agency · July 2020 · grade A
  • Building operating: IAD44 - 43704 Efficiency Drive, Sterling (one of the Buildings 5-9 addresses); total building size 648,500 sq ft
    “Total building size: 648,500 ft² (60,250 m²)”
    Company · Oct. 2026 · grade B
  • Original target date: not stated
    “Digital acquired the site (previously known as Western Lands) in 2018 and filed plans to develop the campus in 2020, with the first building delivered in 2023”
    News report · Oct. 2026 · grade C
  • Dominion Energy Virginia reports approximately 70 GW of large-load delivery points in its interconnection queue (about 25 GW assigned projected connection dates through end-2031; a further 45 GW under study) under the qu
    “The utility, which serves most of Virginia, said it has approximately 70GW of large-load delivery points (DP) within its interconnection queue”
    News report · Oct. 2026 · grade C
  • Digital Realty bills Digital Dulles as the world's largest multi-tenant data center campus (11.7M sq ft framing) - a marketing claim that exceeds both the 2020 JPA (7.46M sq ft) and the county-document Phase 3 total (7.8
    “the company has billed it as the world largest multi-tenant data center campus”
    News report · Oct. 2026 · grade C

Imagery and records: Satellite imagery: Maxar via Esri World Imagery Wayback; Sentinel-2 (ESA Copernicus). County deeds: ATTOM.