Endeavour Silver Provides Q1 2024 Construction Progress Update on Terronera; Construction Progress Reaches 53% Completion

VANCOUVER, British Columbia, April 23, 2024 (GLOBE NEWSWIRE) -- Endeavour Silver Corp. (“Endeavour” or the “Company”) (NYSE: EXK; TSX: EDR) is pleased to provide a Q1 2024 construction progress update for its Terronera Project in Jalisco state, Mexico. A photo gallery presentation accompanies this news release and can be found here or on the Company website at Terronera Project Progress Photos. All dollar ($) references in this news release are United States dollars.

The Terronera project made significant progress in the first quarter, as concrete work was nearly complete on the Upper Plant Platform and erection of structural steel advanced for areas including crushing, coarse-ore storage, grinding, flotation, and thickening. Mechanical installation of major equipment continued to advance on schedule and the project remains on track for commissioning in Q4 2024.

“Site activities ramped up rapidly, as overall construction surpassed the halfway milestone,” commented Don Gray, Chief Operating Officer. “We’ve been very pleased with progress of structural steel erection and major equipment installation including the semi-autogenous grinding (“SAG”) and ball mills, apron feeders and flotation cells. Our procurement and materials management planning has been effective in keeping pace with site construction. We’ve been able to install many components upon immediate arrival to site, while making use of the limited laydown area. Underground mine development continues advancing very well, and we anticipate initial ore access in Q2. We are exceptionally pleased with the progress our Terronera team is making and remain committed to successfully completing and operating Endeavour's next core asset.”

Q1 2024 Construction and Development Highlights

As of March 31, 2024, site works and activities included:

• Safety – A strong onsite safety focus has enabled a notable 60% reduction in the lost-time injury frequency rate since Q2 2023, during a substantial increase in the workforce. Ongoing initiatives such as mandatory certification for working-at-heights, frequent field audits and inspections, rescue-team training, and regular emergency drills continue.
  
• Progress – Overall project progress reached 53% completion, with more than $158 million ⁽¹⁾ of the project’s budget spent to date. Project commitments total $225 million ^(1,2) which is 83% of the $271 million capital budget.
  
• Engineering – Efforts have been transitioning over to construction support. Detail design was completed for the Tailing Storage Facility (“TSF”), Portal 2 waste dump, and Lower Platform excavation.