Proposals · Dark fiber · E-Rate
FWISD WAN specdraft — validation pending
Dark-fiber laterals from every FY2026 E-Rate WAN site to the nearest Fort Worth Fiber handhole — ROW-snapped routes with real billable footage (DIA router, EPSG:2276). Routed 2026-07-17.
151 sites in scope
69.4 clean lateral miles
96% tie-ins on planned plant
Laterals — every facility connects
Planned tie-in (FWF CP pending) 130 · 66.7 mi Built tie-in (connect today) 5 · 2.7 mi Flagged — >15k ft outliers 4 · 15.9 mi Near-net drop connectors 13 Proposed backbone extensions 3 · 9.2 mi Protection plan — r-spec arcs 4 arcs (superseded) uniform ring options 3 Sub-ring concept — Hemphill/Fairmount 13,689 ft
Purple trunks = trunk-and-branch optimization (see fwisd_optimization.md): −$1.72M gross ROW
construction, +8.5 mi net-new backbone, +3,184 near-net BSLs. Codex-reviewed draft, pending Egan.
r-spec protection plan (Will's rule: a single cut farther than r from a site
must not sever it; r = 2,000 ft for DCs/admin, 5,280 ft for HS/MS, 10,560 ft for others). Only 11 of 152
sites need protection work; 4 designed arcs cover 10 of them — East Handley's arc is cheaper than the
unprotected design . Waiver-priced (not drawn): Marine Creek +$268k, Valentine SC +$128k, SC4 +$137k.
Hemphill/Fairmount sub-ring : replaces 12,581 ft of parallel unprotected laterals
(De Zavala, Insights, TYR, 3× Daggett) with a 13,689-ft collector touching backbone at BOTH ends
(P03-CP02 north ↔ P06-CP02 south) — +$22k for full single-cut protection and +1,347 near-net BSLs.
$ Economics breakdown
Reference
FWISD sites (+ CFW DC anchor) 152 Tie-in handholes 124 Sprocket FWF network context
Footage (new-build ROW conduit)
Class Routes Billable ft
Built tie-in 5 14,472 Planned tie-in 130 352,001 Clean total 135 366,472 ft · 69.41 mi Flagged outliers 4 83,836 (excluded)
Median lateral 1,778 ft · mean 2,715 ft. 130 laterals tie into planned FWF plant across
42+ construction packages — connection follows CP completion. Anchors confirmed: District Service
Center (7060 Camp Bowie) 733 ft ; CFW Data Center (200 Texas St) 1,110 ft .
Every facility connects: dotted sky-blue connectors mark the 13 near-net sites whose handhole
is ≲900 ft (drop-scale, field-measure — not ROW footage). Marine Creek Collegiate routed via the
route-planner's osmnx fallback (DIA router blocked by an OSM graph island) — includes ~1,990 ft
on-campus lateral across the TCC NW campus; validate on Egan's pass.
Costing in fwisd_bom_draft.md (Dropbox FWISD dir) — $20-class blended $/ft vs Conterra's $48.85/ft.
Draft for Egan's validation pass — green/orange/red in the KMZ mirror built/planned/exception.