Strategic Mountaintop Infrastructure & Hardened Vault Leasing
Perched at the apex of the Santa Cruz Mountains, Sierra Morena Tower offers California's most defensible, high-altitude terrestrial communications and blast-hardened edge computing facility.
Tower Crown & Top RAD Centers
Elevated 30% higher than neighboring ridge installations, our top antenna and microwave rad centers command an unobstructed 360-degree, 60–90 mile Line-of-Sight (LOS) spanning all 9 San Francisco Bay Area counties and the Monterey Bay.
- Ultra-Low Latency Microwave Relays: Direct point-to-point links between Silicon Valley, SF Financial District, East Bay hubs, and transcontinental routes.
- Carrier & WISP Distribution: High-capacity mmWave, 5G/6G small cell, and fixed-wireless backhaul connecting Coastside communities to main fiber rings.
- Federal & Aviation Precedent: Active FAA/L3Harris ADS-B distance measuring installations (Contract DTFAWA-07-C-00067).
Nuclear-Hardened Vault & AI Edge Compute
Built during the Cold War as a key AT&T Long-Lines telecommunications fortress, our subterranean bunker is engineered to withstand nuclear overpressures, EMP shocks, and seismic events while providing heavy industrial power.
- Air-Gapped Private AI Vaults: Secure, high-security colocation for NVIDIA H100/H200 clusters requiring off-grid physical sovereignty.
- Free-Air Mountain Cooling: Naturally cold ambient mountain air drastically reduces PUE and cooling overhead compared to valley data centers.
- Dual-Path Fiber & Backup Power: Carrier-neutral dark fiber pairs, automated emergency diesel generator stack, and battery banks.
5 MW High-Voltage Substation Interconnect
Situated adjacent to PG&E's 230 kV high-voltage transmission line, Sierra Morena Tower possesses an active upgrade corridor to support up to 5,000 kW of dedicated three-phase industrial power for high-density compute.
- Silicon Valley Power Solution: Solves the #1 roadblock for Bay Area enterprise computing—immediate access to high-capacity grid power.
- Step-Down Infrastructure: Engineering path for 230 kV to 480V 3-phase switchgear to power modular data center containers and microgrids.
- Offsite Solar Offset: Complementary green energy architecture producing clean power on the same PG&E grid.
Peninsula Tower Technical Comparison
Why Sierra Morena Tower (FCC ASR #1260084) is the benchmark choice for broadcast, telecom, and compute tenants:
| Specification | Sierra Morena Tower (Our Site) | Sutro Tower (San Francisco) | San Bruno Mountain | Typical Peninsula Rooftop |
|---|---|---|---|---|
| Physical Land Elevation | 2,547' MSL (Highest Point) | 977' MSL | 1,314' MSL | 50' - 200' MSL |
| Line-of-Sight Coverage | 360° Unobstructed (60–90 Miles) | SF & North/East Bay (Blocked South) | SF Airport & North (Blocked South) | Localized (< 5 Miles) |
| Facility Structure | Nuclear-Hardened Underground Bunker | Standard Surface Shelter | Standard Surface Shelter | Commercial Rooftop Penthouse |
| On-Site Electrical Service | 800A 3-Phase (5MW Upgrade Path) | Commercial Shared Utility | Commercial Shared Utility | Standard 100A - 200A Shared |
| Atmospheric Advantage | Above Marine Fog Layer (Less Attenuation) | Frequent Fog/Inversion Exposure | High Marine Layer Distortion | Dense Urban Multipath & Noise |
| FCC Registration | ASR #1260084 | ASR #1006526 | Multiple Commercial ASRs | Unregistered / Rooftop |
Radio Broadcaster Studio: Consolidate Boosters & Expand Upper Bay Reach
How Bay Area commercial FM broadcasters, station managers, and chief engineers eliminate 2–3 costly low-altitude ridge boosters while securing pristine 60 dBu line-of-sight coverage over the Upper Bay, Silicon Valley, and Pacific Coastline from a single 2,547' MSL summit.
Upper Bay Demographics
San Francisco • Oakland • Berkeley • East Bay Hills
At 2,547' MSL, Sierra Morena Tower commands an elevated, unobstructed angle of incidence over the San Francisco Bay, overcoming the severe terrain shadows created by San Bruno Mountain when broadcasting into high-density commercial and residential centers.
Silicon Valley & Peninsula
Palo Alto • Mountain View • Sunnyvale • San Jose
Direct downward line-of-sight along I-280, US-101, and Hwy 85. Reach the most affluent commuter audience in Northern California without the severe multipath echoes caused by low-altitude valley roof installations.
Coastside & Highway 1
Half Moon Bay • Pacifica • Coastside Communities
Urban transmitters at Sutro Tower and Mount Diablo are completely blocked from the Pacific Coast by the Santa Cruz Mountain range. SMT sits directly on the summit ridge, simultaneously broadcasting west to the coast and east to the Bay.
Fog Layer Immunity
Above Marine Inversion (800' – 1,500' MSL)
Sutro Tower (977' MSL) and San Bruno Mountain (1,314' MSL) are chronically enveloped by dense coastal marine fog, causing severe tropospheric ducting and RF attenuation. SMT's 2,547' MSL summit towers above the marine layer in clear mountain air.
Booster / Repeater Consolidation ROI Calculator
Calculate your station's potential annual savings by replacing fragmented low-altitude repeater leases with one summit installation:
FCC Part 73 Auxiliary Transmitter Facility
Major group broadcasters (Audacy, Cumulus, iHeart, Bonneville) and public stations (KQED, KALW, KCSM) require off-site emergency auxiliary transmitters. If Sutro Tower or San Bruno Mountain undergoes antenna re-lamping, structural painting, or experiences wildfire evacuation, SMT provides instant, high-elevation failover without taking your station off air.
Direct Studio Microwave Line-of-Sight
Clear visual line-of-sight to major studio facilities across San Francisco, Oakland, San Jose, and the Peninsula. Deploy low-latency Aural Microwave STL (Part 74) or dark-fiber IP audio cross-connects directly into our hardened subterranean racks.
Schedule Site Tour & Request Facility Topsheet
Whether you require a single high-elevation microwave dish position, an auxiliary FM/TV relay, or a secure private cage in our blast-hardened bunker, our technical team will prepare custom CAD mounting profiles and lease terms tailored to your hardware.