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 21, 2026
SWCA Environmental (synthetic)
Attn: contact236@example.gov
RE: Section 106 Consultation, Bridge rehabilitation — Pima Co. Phase I
SHPO File: PRJ-2026236 · Pima County, AZ
Received: 3/21/2026 · Deadline: 4/20/2026

Dear contact236@example.gov:

The Arizona State Historic Preservation Office (SHPO) has reviewed your bridge rehabilitation 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. Bridge rehabilitation submitted by SWCA Environmental (synthetic).

Area of Potential Effects (APE). The APE includes a polygon of approximately 103.53 km² centered at 33.1336°, -111.0291° in Pima County, Arizona.

Federal nexus. The APE intersects the following surface management jurisdictions: Private Land (Private); Bureau of Land Mgmt. (BLM); Tonto N.F (USFS); Bureau of Reclamation (BR).

Flood hazard. The APE intersects FEMA flood zone(s) D, X.

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

  • Mineral Creek Bridge (NRIS 88001648)5.09 km from APE centroid.
  • Kelvin Bridge (NRIS 88001646)6.12 km from APE centroid.

ADOT historic / scenic route(s). Winkelman to Superior; Copper Corridor Scenic Road West.

Determination. Based on the foregoing, SHPO concurs with a finding of NO ADVERSE EFFECT 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,

M. Tso
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.