Friday, May 2, 2025 | University of Guam, SBPA Room 129
The Northern Guam Lens Aquifer Tour takes you to four sites, each of which is an example of the four basic components of the Northern Guam Lens Aquifer. Before embarking on the fieldtrip to these sites, the tour begins with a virtual tour of the NGLA, which is a computer graphics 3D model of the hydrology of Guam. During the field trip experience, we observe and discuss the geological features that form the aquifer components and the hydrological properties that allow water to flow through.
What to Expect
Bottled water will be available. No restrooms will be available except at Stops 3 (Agana Shopping Center) and 5 (Mataguac Hill).
There will be no hiking, but participants are advised to wear appropriate casual field clothes, headgear, and footwear. Be prepared for intense sunlight. Hats and sunscreen are advised.
In compliance to MSHA (Mine Safety & Health Administration), participants are required to wear hard hats, safety vests, pants, and closed-toe shoes (e.g., sneakers) at the quarry. Hard hats and safety vests will be provided on site. Sunglasses are also advised at the quarry.
For the visit at Mataguac Hill, bugs spray/repellent is advised.

What to Wear
Required Attire
Some sites require the following attire before entry. This is to comply with their safety measures.
- Closed-toe shoes (e.g., sneakers)
- Pants
Recommended Items
- Sunglasses
- Hats
- Sunscreen
- Bugs spray/repellent
- Umbrellas

What is Provided
The following items will be provided by WERI:
- Hard hats
- Safety vests
- Lunch
- Water

Tour Itinerary
Start – Participants meet at UOG’s SBPA Room 129 for the NGLA Virtual Tour and departure (See UOG campus map)
Stop 1 – Channel 10, Mt. Alutom (The Floor of the Aquifer)
Stop 2 – Agana Shopping Center (Break for lunch, restrooms)
Stop 3 – DPW Quarry, Dededo (The Core of the Aquifer)
Stop 4 – Mataguac Hill Peace Memorial Park, Yigo (The Plumbing of the Aquifer)
Stop 5 – Guam Korean Pacific Presbyteran Church, Barrigada (The Roof of the Aquifer)
End – Participants return to the point of departure, UOG