230713 OCS-PA034 Pre-Application Report (1).pdf

P.O. Box 2757 Portland, OR 97208-2757

825 NE Multnomah St., Suite 550 Portland, Oregon 97232 cc: _Transmission Contracts

June 20, 2023

OS ENGINEERING – Medford Floating Solar / CS-PA034 Pre-Application Report

Dear Mr. Corwin:

Pursuant to the request by OS ENGINEERING (“Applicant”) received on June 14, 2023, for an Oregon Community Solar Project Pre-Application Report, pursuant to PacifiCorp’s Community Solar Procedures, PacifiCorp has determined the following answers to the request by the Applicant to potentially interconnect to a point on PacifiCorp’s Distribution System.

Project Information:

Project Name: Medford Floating Solar Project Location:

Point of Interconnection: Circuit 5R285 out of Jacksonville substation Lat/Long: 42.321705, -122.947866

Site Map Attached: No Solar Generator Information: 800kW Solar

1. Total capacity (in MW) of substation transformer bus, bank, or circuit based on normal or operating ratings likely to serve the proposed Point of Interconnection

a. Substation Transformer/Bus: 25 MVA

b. Circuit: 16.3 MVA

2. Existing aggregate generation capacity (in MW) interconnected to a substation transformer bus, bank, or circuit (i.e., amount of generation online) serving the proposed Point of Interconnection.

a. Substation: 2.21 MW

b. Circuit: 1.16 MW

3. Aggregate queued generation capacity (in MW) for a substation transformer bus, bank, or circuit (i.e., amount of pending generation) serving the proposed Point of Interconnection.

a. Substation: 0 MW

b. Circuit: 0 MW

4. Available generation capacity (in MW) of substation transformer bus, bank, or circuit to serve the proposed Point of Interconnection (i.e., total capacity less the Aggregated Nameplate Capacity).

a. Substation: 22.79 MVA

b. Circuit: 15.14 MVA

5. Substation nominal distribution voltages and/or transmission nominal voltage if applicable. Nominal distribution circuit voltage at the proposed Point of Interconnection.

a. Substation: 12.47 kV

b. Circuit: 12.47 kV

6. Approximate circuit distance between the proposed Point of Interconnection and the substation.

a. 4432 feet identified pole location to substation.

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7. Annual peak daytime load and minimum daytime load on the substation and circuit:

a. Substation

i. Peak: 18.7 MVA

ii. Minimum: 4.5 MVA

b. Circuit:

i. Peak: 10,801 kVA

ii. Minimum: 2.0 MW

8. Number and rating of protective devices and number and type (standard, bi-directional) of voltage regulating devices between the proposed Point of Interconnection and the substation. Identify whether the substation has a load tap changer.

a. The circuit relay is an overcurrent relay. There are 15T line fuses to the location.

The substation has a load tap changer.

9. Number of phases available at the proposed Point of Interconnection. If a single phase, distance from the three-phase circuit.

a. Three-phase

10. Limiting conductor ratings from the proposed Point of Interconnection to the distribution substation.

a. Circuit: Three-phase #2 ACSR has a 3455 kVA limit, 160 amps per phase at

12.47 kV.

11. Whether the Point of Interconnection is located on a spot network, grid network, or radial supply.

a. Radial

12. Based on the proposed Point of Interconnection, existing or known constraints such as, but not limited to, electrical dependencies at that location, short circuit interrupting capacity issues, power quality or stability issues on the circuit, capacity constraints, or secondary networks.

a. The 15T line fuses are projected to be overloaded.

Does this project meet sizing requirements to apply as a Community Solar Project: YES

This report is intended to provide high level information on PacifiCorp’s Distribution System.

PacifiCorp will provide additional information related to this report, if requested by Applicant, in accordance with PacifiCorp’s Community Solar Procedures. Detailed analysis will require a Community Solar Project Application.

Thank you, John Sullivan Project Manager PacifiCorp Transmission mat.corwin Highlight mat.corwin Highlight mat.corwin Highlight mat.corwin Highlight mat.corwin Highlight mat.corwin Highlight mat.corwin Highlight mat.corwin Highlight mat.corwin Highlight