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
April 20, 2026
Private applicant (renewable)
Attn: contact290@example.gov
RE: Section 106 Consultation, Emergency stabilization — Pinal Co. Supplemental
SHPO File: PRJ-2026290 · Pinal County, AZ
Received: 4/20/2026 · Deadline: 5/20/2026

Dear contact290@example.gov:

The Arizona State Historic Preservation Office (SHPO) has reviewed your emergency stabilization 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. Emergency stabilization submitted by Private applicant (renewable).

Area of Potential Effects (APE). The APE includes a polygon of approximately 101.66 km² centered at 34.6861°, -112.0085° in Pinal County, Arizona.

Federal nexus. The APE intersects the following surface management jurisdictions: Private Land (Private); State Trust Land (State); Prescott N.F (USFS).

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

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

  • Thompson Ranch (NRIS 86002162)4.20 km from APE centroid.
  • Smelter Machine Shop (NRIS 86002154)5.39 km from APE centroid.
  • UVX Smelter Operations Complex (NRIS 86002164)5.41 km from APE centroid.
  • Master Mechanic's House (NRIS 86002152)5.49 km from APE centroid.
  • Superintendent's Residence (NRIS 86002159)5.52 km from APE centroid.
  • Clemenceau Public School (NRIS 86002149)6.20 km from APE centroid.
  • Strahan House (NRIS 86002157)6.50 km from APE centroid.
  • Building at 826 North Main Street (NRIS 86002147)6.88 km from APE centroid.
  • Cottonwood Commercial Historic District (NRIS 00000497100005549)7.06 km from APE centroid.
  • Edens House (NRIS 86002150)7.13 km from APE centroid.

Section 4(f) considerations. 1 pre-1945 bridge(s) lie within 5 km of the APE; ADOT and FHWA Section 4(f) eligibility should be confirmed prior to construction.

ADOT historic / scenic route(s). Prescott to Flagstaff Highway; Jerome-Clarkdale-Cottonwood Historic 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,

R. Alvarez
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.