Prototype·Built by Concourse for Arizona State Historic Preservation Office
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Arizona State Historic Preservation Office
State Parks Building · 1100 W Washington St · Phoenix, AZ 85007 · shpo@azstateparks.gov
Prototype letterhead — generated by SHOPP
March 23, 2026
FHWA via ADOT
Attn: contact210@example.gov
RE: Section 106 Consultation, Highway widening (NEPA/Section 106) — Pima Co. Phase II
SHPO File: PRJ-2026210 · Pima County, AZ
Received: 3/23/2026 · Deadline: 4/22/2026

Dear contact210@example.gov:

The Arizona State Historic Preservation Office (SHPO) has reviewed your highway widening (nepa/section 106) submission for the above-referenced undertaking pursuant to Section 106 of the National Historic Preservation Act and its implementing regulations at 36 CFR Part 800.

Project description. SYNTHETIC demonstration record. Highway widening (NEPA/Section 106) submitted by FHWA via ADOT.

Area of Potential Effects (APE). The APE includes a polygon of approximately 102.97 km² centered at 33.5995°, -111.0411° in Pima County, Arizona.

Federal nexus. The APE intersects the following surface management jurisdictions: Tonto N.F (USFS).

Flood hazard. The APE intersects FEMA flood zone(s) D, A (Special Flood Hazard Area).

Identified historic properties. The following NRHP-listed or eligible properties lie within or adjacent to the APE:

  • Theodore Roosevelt Dam National Register District (NRIS 98000144)7.25 km from APE centroid.

ADOT historic / scenic route(s). Quartzsite to Wickenburg to Phoenix to Globe to Show Low to Springerville; Desert to Tall Pines Scenic Road.

Determination. Based on the foregoing, SHPO concurs with a finding of ADVERSE EFFECT, with stipulations pursuant to 36 CFR 800.5. Stipulations to protect contributing resources during construction shall be incorporated into the project design and monitored by a qualified historic preservation specialist.

This determination is non-final until concurrence is received from all consulting parties. Should the scope of the undertaking change, please resubmit for re-review per 36 CFR 800.13.

Sincerely,

A. Whitman
reviewer · Arizona SHPO
This letter was auto-drafted by SHOPP using the unified GIS layer set and the project’s submitted polygon. Final review and signature by the assigned reviewer is required before issuance.