The Willamette Stone and the Baseline Rd Markers

The above stainless steel marker identifies the location of the Willamette Stone.

The Willamette Stone is a point of intersection where the Willamette Meridian and the Willamette Baseline meet. This intersection is located in Portland's West Hills. The intersection was established in June of 1851 by General Surveyor John Preston for the Territory of Oregon. All townships and sections of land in the States of Oregon and Washington are measured from this point.

The above plaque is located in Willamette Stone State Heritage Site Park off of Skyline Blvd in the West Hills of Portland, Oregon. This surveying point is the basis for all land claims in Oregon and Washington since 1851. The intersection between the lines on the map below represent the Willamette Stone.

The original Base Line survey was performed by William Ives in 1851. An east-west road was built adjacent to this survey line shortly after this. The road was called "Baseline Road" and was opened to the public on November 24, 1854. Sometime after this (probably during the 1870's), large stone markers carved from basalt rock were placed along this thoroughfare at every mile from the Multnomah County Courthouse (originally built in 1866) out to the Sandy River. There were 15 original stone markers. Nine stones remain while six have been lost. Each stone is approximately 6-feet long and weighs a hefty 500 pounds. The stones are tall, four-sided shafts of carved rock that taper towards the tip. Each is buried with only the top 2 to 3 feet above ground. Each stone is beveled at the top in a pyramidal fashion. These special stones or obelisks are very historical and remind us of how much travel has changed in the last 150 years.


Heading Out of Town

Imagine starting your journey from downtown Portland out to the Sandy River back in the day with a ferry ride across the Willamette River on the Stark Street Ferry. After docking on the east side of the river near SE Oak Street, you would depart the ferry and travel over a long, wooden trestle until you reached Base Line Rd (approximately where MLK Blvd and Stark Street are today). From here, you would follow the dirt road due east (with the aid of a horse or wagon) to the Sandy river using the stone mileposts as beacons to guide your way. These stones were welcome sights to road travelers acting like mileposts indicating your progress. Before Base Line Rd was built, there were only 2 roads leading from Portland on the east side of the Willamette River. Base Line Rd was later renamed Stark Street.

More about the Obelisks

Each stone marker is unique. Some of the stones are pointed at the top (P7), others are flattened (either by design or trauma over the years). Each has the "P" and the it's number hand carved so they are all different. The "P" stands for Portland. Some stones are weathered and some lean (P14, the one by Mt. Hood Community College). One stone has an iron rod attached to it (P5 on 78th). One has a banner above it (also P5) while another has a nice plaque next to it. The majority of the markers are located on the south side of Stark Street. The two exceptions are the markers at 61st (P4) and 117th (P7). When the mileposts were initially placed, they all occupied the south side of Baseline Road/Stark Street. Most of the stones have been painted yellow or white at some time. Some of the stones have a square, concrete base (P7 and P8). It is doubtful that any of the markers occupy their original location. Stark Street has been widened many times since the original construction of Baseline Road. It is thought that most of the stones are within a few feet of their original locations. Some of the obelisks seem to have a caretaker (Thank you David Douglas Historical Society!) while others persevere. These old mileposts are some of Oregon's oldest monuments. The stones are probably close to 150 years old! Mileposts P4 and P5 are listed as Historic Landmarks for the City of Portland. They are classified as street furniture.

There are many theories about the stones. No one is sure who put the stones in and when. According to available data, it is likely that the stones were laid out and set in the 1870's by the U. S. Army from the barracks/depot near S.W. Front and Madison. Measurement being made with a one-mile rope wound around the axle of a wagon. It also seems likely that there were mile markers in place along the four main routes from Portland. These routes would have been the most traveled roads leading from Portland in the main directions of north, south, east and west.

North Route: The north mileposts would have been laid out along St. Helens Road (current US Hwy 30). There is documentation that indicates the presence of 3 mileposts at the following locations: P3 at NW 31st Ave; P6 at 6600 block and P9 opposite of the playground north of Linnton. I have been unable to find these stones.

South Route: The presence of one remaining stone gives a clue to the possible existence of mile markers along Capitol Highway (one of the state's oldest paved roads). P7 is located at the Capitol Hill Branch of the Multnomah County Library at 10723 SW Capitol Highway.

East Route: The Stark Street Markers.

West Route: Speculation would lead to a route along the Sunset Highway, Burnside Street or Jefferson Street.

Finding the original alignment of these roads when these stones were set in place would give a idea where the missing markers could be found.