Dark fiber pricing is famously opaque. Contracts vary by route, strand count, and term, and private carriers rarely publish rate cards. Still, enough public utilities and RFPs disclose figures to build realistic benchmarks. Use the calculators and tables below to estimate “per strand-mile per month” leases or IRUs in major U.S. metros right now, and pressure-test quotes against what public agencies and utilities actually charge.
How To Read Metro Prices
Dark pricing shifts with route length, right-of-way, competition, and who owns the plant. City utilities often publish tariffs. Private carriers quote case-by-case. Use public rates as anchors, then adjust for your route and term.
Published Reference Points – Current and Recent
Nashville – NES Dark Fiber
Clear per mile tariff with ring discount and O&M line item.
- Rate card: 0-15 mi $144, 16-30 mi $114, 31-50 mi $97, 51+ mi $80 per fiber per mile per month.
- Ring discount: 20 percent any distance. Minimum charge $500 per month.
- Maintenance: $5 per fiber per mile per month stated separately.
Huntsville – Utility Transport
Backbone ring and segment rates per strand with term tiers.
- Entire backbone ring – per strand: 3-yr $3,500 monthly, 5-yr $3,220, 10-yr $2,893, 20-yr $2,450.
- Segments: Published schedule for fiber hut to adjacent hut spans. Collocation extra.
Silicon Valley – Palo Alto Utilities
City dark fiber license with published ranges and discounts.
- Monthly license: City page cites roughly $635 to $2,400 per month depending on path and discounts.
- Discounts: Quantity, buffer tube, route length, ring topology, and term discounts are defined in the rate schedule.
- Drop and custom cable fees: Per foot monthly fees plus minimum apply to laterals.
Eugene – EWEB Comparator
Public presentation shows regional ranges per strand mile.
- Regional range: $19 to $295 per strand mile monthly depending on location, with common regional band $38 to $55.
- Class pricing example: 2017 proposal showed commercial $52.18 per strand mile. For context only.
Market Signals – 2024 to 2025
Demand, capacity, and inflation influences on pricing.
- Metro dark purchases climbed sharply year over year per Zayo research update.
- TeleGeography notes pricing updates across transport services and ongoing price pressure in several markets.
Note: Municipal postings are transparent anchors. Private carrier quotes can price higher or lower based on route uniqueness, splicing, hut access, and long terms with maintenance commitments.
Benchmark Calculator – Pair Pricing and IRU Equivalent
Use this to turn a per mile per fiber rate card into a monthly pair price, then compare to an IRU style upfront using discounting. Include your maintenance line if it is separate.
Interpretation: IRU-equivalent is the upfront that equals the NPV of monthly payments for a pair at your settings. Compare to actual IRU quotes, plus MRC for O&M if applicable.
Cheatsheet – How These Translate To A Pair
| Metro example | Reference | Illustrative inputs | Example monthly pair | Notes |
|---|---|---|---|---|
| Nashville | NES rate card | 25 miles, $114 per fiber per mile, ring discount 20 percent, O&M $5 | = 25 x 2 x ($114+$5) x 0.80 = $4,760 | Then add any cross-connect or hut fees. |
| Huntsville | Backbone ring strand tariff | 20-year term, $2,450 per strand per month | = $2,450 x 2 = $4,900 | Per strand pricing on entire ring. Collocation extra. |
| Silicon Valley | Palo Alto license | $635 to $2,400 monthly license per project with discounts | Varies by path and discounts | Use CPAU proposal for exact per-path number. |
| Regional comparator | EWEB presentation | $38 to $55 common band per strand mile | Pair per mile = 2 x band | Historic range – validate locally. |
Contract Checklist – Items That Move Price
- Route uniqueness and overlaps with bridges, rail, floodplain, or tunnels.
- Splice count, mid-span access, and any new laterals or handholes.
- Maintenance scope: routine patrols, emergency restoration, and SLA clocks.
- Hut or cabinet access, power, and cross-connect fees.
- Escalators, CPI ties, and renewal options or step downs at term lengths.
All numbers above come from publicly posted utility schedules and recent market commentary. Actual carrier quotes in major metros can price above or below these anchors based on route uniqueness, collocation needs, and term structure. Before you commit, request a map with exact splice points, confirm any separate O&M or make-ready fees, and run the calculator with your real miles and discounts so your budget reflects the working route and not a generic average.
