00017723 Exhibit E Material Source Narrative.pdf

DATE: July 23, 2026

TO: Ramon Alonso ODOT R4 Maintenance Operations Liaison

CC: Mike Davis ODOT District 11 Maintenance Manager

FROM: Scott Billings, CEG ODOT Senior Engineering Geologist

Micah Lederer, CEG ODOT Engineering Geologist

SUBJECT: Material Source Narrative Horseshoe Bar Reservoir Quarry ODOT Source #OR-13-068-5, DOGAMI #13-0039 US395D (Hwy 049), MP 16.27

Introduction This memo and attachments should be duplicated and distributed to all bidders that inquire about this prospective material source, as per Section 00120.25 of the Oregon Standard Specifications for Highway Construction, 2024 ed. The development plan can be found on Sheets GE01 and GE02 of the Plans, and the Special Provisions are in Section SP00235 and SP00335. The Contractor should review the information provided in this application package and consider variables in production and implementation to produce the required material quantities based on their knowledge of the project-specific development plan and experience with like materials. Any changes to the development plans or special provisions for the material source must receive written approval of the Engineer.

The current development plan for this source was prepared based upon the estimate of the project requiring approximately 16,000 cubic yards of produced 3/8” – No. 4 graded medium chip aggregate. The area identified in the plans as the Excavation Area contains adequate material necessary to complete the project with the above-proposed quantity.

The site area covers a total of 40 acres; however, only approximately 12 acres will be available for equipment setup, aggregate processing, and stockpiling and an additional 1 acre for new excavation area.

This prospective material source is a BLM-owned ODOT-controlled source of aggregate materials, located in the SW¼ SE¼ of Section 33, T. 25 S., R. 25 E., W.M., approximately 16 miles south of Riley, OR. To access the site, turn west onto Egli Ridge Road at MP

16.27 on US395D, then travel 2.2 miles to the source.

Department of Transportation ODOT GEEGH Section (Mountain Unit)

63055 N Hwy. 97 Bldg. M Bend, OR 97703

Phone: (541) 388-6186

Material Source Narrative Horseshoe Bar Reservoir Quarry ODOT Mountain Unit - Geology

Site Geology Horseshoe Bar Reservoir Quarry is located in an olivine basalt flow according to the published Geologic Map of Oregon East of the 121st Meridian by George W. Walker (Prepared in cooperation with the Oregon Department of Geology and Mineral Industries).

However, visual observation indicates this rock may be rhyolite, and obsidian interbeds are present in the quarry floor. Based on the description associated with this area known as the stratigraphic unit Tob on the geologic map, it grades laterally into Ts, a palagonite breccia and tuff unit.

Development Concept The area identified as the Excavation Area on the development plan map should be in-place material, topped with a thin layer of overburden toward undeveloped west and some previously loosened material on the existing working face. The concept for the current development is to move west into the hill, establishing a working bench at elev. 4,775 and clean stable working faces on the north, east, and west sides. The long-term plan will be to maximize the area available for future stockpiling by reconstructing the south wall with oversize and rejects to a 1V:1.5H slope or flatter, then redistributing the stockpiled overburden on top for final reclamation.

When developing the Erosion and Sediment Control Plan, the Contractor should be aware of a drainage southeast of the pit, beyond the work area boundary. Special attention should be given to make sure all water is contained within the work area boundary, controlling all run off from flowing beyond the work area boundary into this drainage.

Past Operations This quarry has been used to produce ACP aggregate and other associated paving aggregate products for numerous Agency projects, most recently in 2021-2022. Selected laboratory aggregate quality testing results for the quarry are presented in the attachments.

One issue we have on file associated with this site is the existence of some oversize material within the site. Special consideration should be given to the preparation of the bid and the blast plan, taking into account the need to handle or reduce oversize material to a usable size. Even with a successfully executed blast, special equipment or equipment setup may be necessary for secondary reduction, or to enable the Contractor to handle the larger material if it is created or exists in the source. As addressed in the Specifications, all loosened oversize material, with the exception of 100 cubic yards (maximum dimension of 2.5 feet), is to be reduced to a size no larger than 1 foot diameter;

therefore, Contractors should bid accordingly.

General Information Additional information for this material source, including (but not limited to) operational records, laboratory data, drill logs, and core photos, are available for review from the ODOT GEEGH Section (Mountain Unit) at the ODOT Region 4 Tech Center, 63055 N Hwy. 97 Bldg. M, Bend, OR 97703. Any Contractor interested in viewing documents or information not summarized or provided herein should contact the Engineer and schedule an appointment to review the material. An ODOT Geology staff representative must be

Material Source Narrative Horseshoe Bar Reservoir Quarry ODOT Mountain Unit - Geology present when information is being reviewed to ensure that content is disseminated accurately, fairly, and consistently throughout the bid process.

As per Oregon Standard Specifications Section 00120.15, Examination of Work Site and Solicitation Documents; Consideration of Conditions to be Encountered, Contractors shall carefully examine this site and become familiar with the existing conditions and appearance of the site prior to bid submittal. Based on the on-site visits and review of all available information, the Contractor will then be able to submit a bid based upon the existing site conditions, the conditions they expect to encounter at the time of the proposed operation, and the most accurate information available for the source. As stated in the operating specifications, any proposed development plan changes shall be submitted in writing for approval by the Engineer. Documentation contained within this Material Source Narrative Packet is for informational purposes only; it is not meant to replace those pages supplied in the Bid Packet.

Attachments

1. DOGAMI Operating Permit #13-0039

2. Laboratory Reports Nos. 22-001329, 22-000516, 21-000780, 11-001693

OREGON DEPARTMENT OF TRANSPORTATION Page 1 of 1

MATERIALS LABORATORY (503)986-3000

800 AIRPORT RD. SE SALEM, OR 97301-4792 FAX(503)986-3096

Contract No.: C15206 EA No.: CON04320 Lab No.: │ 22-000516 │ Project: US395: BIG STICK CREEK - ALKALI LAKE └───────────┘ Highway: LAKEVIEW-BURNS County: HARNEY/LAK Data Sheet No.: F44245 481 Contractor: OREGON MAINLINE PAVING LLC FA No.: S049(006) Project Manager: TOM FEELEY Org Unit: 4833 Bid Item No.: 0470 Submitted By: RAY CUNNINGHAM Org Unit: 4000 Sample No.:

Material Source: 13-068-5 HORSESHOE BAR RESERVOIR Qty Represented: 5000 TONS Sampled At: STOCKPILE Sampled By: Witnessed By:

DATE-Sampled: 22/ 3/ 9 Received: 22/ 3/21 Tested: 22/ 4/ 1 Date Reported: 22/ 4/ 1 Class/Type: COMPLIANCE Use: L2 3/8" ACP FINE AC AGGR Q or G: QUARRY AGGREGATE LABORATORY REPORT - FACAG Size: 1/4-0 ┌──── Test ───────┬────── Lab ──────┐ ┌─ T 84 F. Grav. ──────┬─ T 85 C. Grav. ────┐ │ T 176 S.E. │ │ │ Bulk: 2.445 │ Bulk: 2.346 │

│ T 89 L.L. │ ND │ │ S.S.D.: 2.482 │ S.S.D.: 2.422 │

│ T 90 P.I. │ NonPlastic │ │ Appar.: 2.541 │ Appar.: 2.539 │ │ T 335 Ttl Frac. │ │ │ Absorp.: 1.54 % │ Absorp.: 3.23 % │ │ TM226 Dust/Clay │ │ ├─ T 104 Soundness ────┼─ TM 208 Degrade ───┤ │ TM227 Cleanness │ │ │ C A: F A: 6% │ │ │ TM229 Elong pcs │ │ │ 1.5-3/4: │ │ │ T 304 │ │ │ 3/4-3/8: │ │ │ Uncomp. Voids │ │ │ 3/8- #4: 1.1 % │ Crse Ht: │ │ T 19 Unit Wt. │ │ │ #4- #8: 2.9 % │ P20: │ │ T 329 Moisture │ │ │ #8-#16: 0.8 % │ Fine Ht: │ ├──── T 27/11 ────┼─── 27 ──── 11 ──┤ │ #16-#30: 0.5 % │ P20: │ │ Sieve │ Passing │ │ #30-#50: 0.3 % │ │ │ 2.5" │ │ ├─ T 96 Abrasion ──────┼─ T 21 Impurity ────┤ │ 2 │ │ │ │ Plate #: │ │ 1.5 │ │ │ │ │ │ 1 │ │ ├─ T 335 Fracture ─────┼─ T 112 Friables ──┤ │ 3/4 │ │ │ DF: 1.0: │ Wt'd Avg : │ │ 1/2 │ 100 % │ │ 3/4: │ 1.5-3/4: │ │ 3/8 │ 100 % │ │ 1/2: │ 3/4-3/8: │ │ 1/4 │ 99 % │ │ #4: │ 3/8- #4: │

│ # 4 │ 93 % │ │ SF: #8: │ #4-#16: │

│ # 8 │ 55 % │ ├─ T 113 Lightweight ──┼─ TM 225 Woodwaste ─┤ │ # 10 │ │ │ Coarse: │ Lab: │ │ # 16 │ 34 % │ │ Fine: │ Field: │ │ # 30 │ 22 % │ └──────────────────────┴────────────────────┘ │ # 40 │ │ │ # 50 │ 14 % │ ┌──────────── T 327 Micro Deval ────────────┐ │ #100 │ 10 % │ │ Grading: Loss: % │ │ #200 │ 7.2 %│ └───────────────────────────────────────────┘

1 @ t27 =$ 61.00│ NSM = Not Sufficient Material │ TOTAL CHARGES: $ 0.00 │ 1 @ t11 = 30.00│ REMARKS: └──────────────────────────────┘ 1 @ t84 = 74.00│ Material represented by sample DOES comply with specifications.

1 @ t85 = 58.00│ 1 @ t89/90 = 105.00│ 5 @ t104 = 38.00│

└─────────────────────────── KEVIN BROPHY - LABORATORY SERVICES MANAGER

REPORT SHALL NOT BE REPRODUCED, EXCEPT IN FULL, WITHOUT WRITTEN APPROVAL OF THIS LABORATORY.

C: FILES ; PROJ MGR: TOM FEELEY ; OREGON MAINLINE PAVING LLC ; REG 4 Q.A.C. ; J CIESLAK - AGGREGATE

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