PDX Trees: Canopy Analytics – A New & Comprehensive Look at the Portland Metro Urban Forest! Stunning interactive LiDAR data.

Canopy Analytics

My friend Darvel Lloyd recently forwarded me a link to this fantastic new interactive map of the Portland metropolitan area’s urban canopy. Individual trees have been mapped and plotted from 2014 LiDAR data for the whole of the Portland area. This is the single most important contribution to tree height research ever made publicly available to the Portland area, and greatly exceeds in accuracy and ease of use earlier methods I had utilized using Google Earth’s 3D function starting 3 years ago in my attempt to locate Portland’s tallest trees. The new LiDAR tree heights are often a couple of feet taller than Google earth derived heights, but generally agree within 2%, plus or minus.

Credit is to be given to the fine researchers at Portland State University. Sustaining Urban Places Research (SUPR) Lab in the College of Urban and Public Affairs at Portland State University.

And a special thanks to Jackson Voelkel, Geospatial Research Analyst at the SUPR Lab, for stunning work on integrating LiDAR data for multiple complex GIS applications.

This interactive map makes big tree research a lot more fun, and more importantly adds immensely to the study of individual trees in the grand scheme of the environment & climate change research, as well as what role trees play in mitigating urban heat islands etc.

PDX TREES: Some new updates of tallest trees from 2014 LiDAR Canopy Analytics:

  • Oxbow Regional Park, Gresham: Douglas fir 289 ft
  • Forest Park, Balch canyon: Heritage Douglas fir 250 ft
  • Mt Tabor Park: Douglas fir 200 ft
  • Powell Butte Nature Park: Douglas fir 209 ft
  • Kelly Butte: Douglas fir 188 ft
  • Rocky Butte/ The Grotto: Douglas fir 192 ft
  • Lents Park: Douglas fir 153 ft
  • Mt Scott Park: Douglas fir 150 ft
  • Mt Scott / Lincoln Memorial Park: Douglas fir 197 ft
  • Leach Botanical Garden: Douglas fir 194 ft
  • Brentwood- Private Campground: Douglas fir 148 ft
  • Woodstock Park: Douglas fir 144 ft
  • Eastmoreland, Martin St. Sequoias: 156ft, 138ft, 146 ft
  • Crystal Springs: Douglas fir 158 ft
  • Kenilworth Park: Douglas fir 164 ft
  • Laurelhurst Park: Douglas fir 171 ft
  • Sellwood Park: Douglas fir 180 ft
  • Ross Island: Black Cottonwood 163 ft
  • Riverview Cemetary: Douglas fir 189 ft
  • Tryon Creek Park: Douglas fir 218 ft
  • Mary S Young Park: Douglas fir 211 ft
  • Private. Beaver Creek, near Sandy River: Douglas fir 214 ft
  • Scouter’s Mountain, Happy Valley: Douglas fir 204 ft
  • Private. Happy Valley #6, along Rock Creek: Douglas fir 215 ft
Posted in Eastmoreland Trees, Giant trees, PDX Trees, Redwood trees Portland, Sequoia Trees Portland | Tagged , , , , | 1 Comment

Jennings Lodge Trees still Threatened!

**Update: The property was logged in Sept.- Oct. of 2018, all the major Big 150-180 foot fir trees have been cut down to make way for a 72 unit development. The community has lost a vital green space, wild life habitat, and local park…Oh well. 😦

Image result for Jennings Lodge trees cut

Some of the oldest and tallest trees in Jennings Lodge may soon come down in a rather extensive logging operation if the latest 62 Lot development proposal by Lennar Corp succeeds. Jennings Lodge, Happy Valley citizens lose development appeals

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I just re-read the tree inventory from the preliminary plans. 77% of the 423 trees, or 326 total, are to be axed. 52% of the trees on the 16.7 acre site are Douglas fir (222 in total), and over 180 are slated to be removed for “improvements”- basically, 85% of the Douglas fir overstory, and all of the very largest mature and old growth ones, with the 45 to 62 inch diameters will be cut! Interestingly, of the total tree census, only 3 out of the 423 trees were deemed a real hazard, another 36 considered “unhealthy” making a grand total of about 9% of the forest arguably unsafe. The height of these massive firs hasn’t been discussed much, but most of them  range from 100 to 150 feet, with some really tall ones in the 160 to 180 ft range. I checked my measurements in 2 different survey methods on google earth:

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eastmoreland sequoia

eastmoreland sequoia

Most of the 222 Doug fir are from about 20 to 40 inches in diameter, but about 40 of them are very large mature and potentially Old Growth trees that range from 45 to 62 inches (3.8 to 5.2 feet) Diameter at DBH, making them probably between 125 and 200 years old by my estimates.  Also included in the list is a 61 inch Diameter Redwood. The realization that these are mostly healthy trees has already been computed by timber cruisers, suggesting 860,000 board feet and $500,000 in timber value– for the Douglas fir trees alone:

189 standing Douglas firs that could conservatively yield over 860,000 board feet of lumber or enough to frame 54 2,400-square-foot houses, with the logs delivered to mill having a current market value of around $500,000.Lennar proposal disappoints Jennings Lodge

The loss of so many large trees was even seen as a “misguided request” by one tree removal company reportedly asked to bid on cutting down the trees at the propety:

“At least one large, well respected, tree-removal company asked to bid on cutting down all the trees from the campground property refused the job and walked away saying they wouldn’t have anything to do with what was clearly a misguided request.History should inform Jennings Lodge development

Some of the larger examples of trees are listed below by DBH (diameter) and species:

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Jennings Lodge Tree inventory.jpg

jennings-lodge-tree-inventory-2

 

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Jennings Lodge Estate – Prelminary Plans.

The Jennings Lodge Evangelical center had been a campsite for church groups for 105 years. Local neighbors have reported seeing all manner of birds and animals;  Pileated woodpeckers, Bald Eagles have been seen in the trees,  and deer have even been known to occasionally frequent the area. Being part of the Willamette river watershed, I believe a substantial number of birds and wildlife depend on the site, being so close to the river. The site would make an ideal park, given the large size of nearly 17 acres, grass meadows, and tree groves.

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Stands of Tall Douglas fir – Oct. 2014 Photo by Friends of Jennings Lodge

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Nov. 2015 Photo by Friends of Jennings Lodge

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Large Douglas fir. Nov. 2015 Photo by Friends of Jennings Lodge

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Large mossy Deciduous tree. Nov. 2015 Photo by Friends of Jennings Lodge

Last year the Portland Audubon Society was even looking at the site as a potential wild life care center, “The Audubon folks were excited about all the trees, the idea of repurposing the current buildings rather than tearing them down, and sharing the site with a park.Jennings Lodge neighbors prepare for hearing on proposed 72-lot subdivision

For More info, and how to help please visit: Friends of Jennings Lodge

Important 5 hour audio of public testimony from the Oct. 1, 2015 Clackamas County Land Use hearing regarding the Jennings Lodge proposed development: Audio 1 & Audio 3

 

 

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Measuring Tree height in Google Earth. 3D canopy, and Street view.

Turn on Google Earth’s 3D Buildings Icon. Create a polygon filter and adjust at desired altitude to filter height and find tallest tree. Google 3D renderings are photo realistic, and tend to be better than 95% accurate on flat land.

eastmoreland sequoiaTreeCanopy

Jennings Lodge trees

Accurately measuring trees on slopes and steep terrain is much more difficult. In this instance, subtracting crown height from base Google DEM terrain (non 3D mode) elevation will give a good proxy of height, yet DEM data itself can be inaccurate by as much as 50 – 100 feet. 3D Mode has finer and more exact elevation data. It is also worthy to consult other elevation databases to ensure accurate elevation at the base of the tree.

To Measure trees in Google Street view first select the desired location of the tree’s trunk, or directly under where the tree’s highest point is.  Add a placemark at this location, then turn on the Google Street View mode. While in Street view mode, adjust the height of the placemark until it aligns with the top of the tree’s crown. This method is even more accurate than the 3D mode, as the 3D polygons some times do not render the top 5 or 10 feet or more in slender trees, steeples, etc:

tree heights

Martins sequoias

My post at Google’s forum: https://productforums.google.com/forum/#!topic/gec-open-forum/rsf8Ul4NPGo

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Portland used to have 300 foot tall Douglas fir!

Some Douglas fir trees reported up to nearly 300 feet tall, and 6 to 8-1/2 feet diameter once grew on the south slope of Mt Scott, Portland in 1912. Oregonian archives: The Sunday Oregonian. (Portland, Ore.) 1881-current, May 26, 1912, Image 13

The Sunday Oregonian. (Portland, Ore.) 1881-current, May 26, 1912, Image 13

The Sunday Oregonian. (Portland, Ore.) 1881-current, May 26, 1912, Image 13

The Sunday Oregonian. Portland, Ore. May 26, 1912, pg 13

The Sunday Oregonian. Portland, Ore. May 26, 1912, pg 13

The Antone Sechtem ranch was located in Happy Valley, sheltered between Mt Scott and Talbert Mountain, segmented by Sunnyside road, and was within a couple hundred yards of Mt. Scott Creek. A great sheltered valley for big trees. Very Large Cedar trees also once grew in this valley.

300 feet is about as tall as Portland’s newly built South Waterfront Apartments , and about twice the size of the tallest fir trees growing around most of inner Portland nowadays. Powell Butte & Forest Park do have some Doug firs over 200 feet (the tallest is 252 feet high in Macleay Park), and there are amazingly still some huge fir trees up to nearly 300 feet tall (280-290 ft) and 6 to 8.3 feet diameter at Oxbow Park, Gresham- 15 miles east of Portland- the tallest trees in the Metro. Lewis and Clark recorded in their journals a 318 feet tall fir tree, only 3.5 to 4 feet in diameter (pencil thin!) at the upper reaches of “Quicksand river” in 1806, around the present day Sandy River Delta Park, in Gresham.

1. Douglas fir in background over 300 ft. tall. low-res

Oxbow Park still has some Douglas fir approaching 300 feet tall! – [This one I estimated at over 270 ft. tall, and 7 ft diameter] – Photo by Darvel Lloyd, Nov. 2015

3. Micah at lower base of huge Douglas fir. low-res

Huge Douglas fir, Oxbow Park – 8.3 ft diameter, 280 ft tall. Photo by Darvel Lloyd, Nov. 2015

The 1852  survey map of the Portland basin shows evidence of a once great forest of Douglas fir, Hemlock, and Maple trees. A series of fires between 1825 and 1845 burnt much of this vast forest so that Portland had great open meadows with burnt and fallen timber along most of the central basin and east side, with swamps and marshland extending  from Powell blvd. southward down through Crystal springs, and Johnson creek.

However, large groves of old growth trees remained east of 82nd ave, near Rocky Butte, down to Mt Scott and Happy Valley.

The Honorable Andrew J. Dufur, (whose son later formed the town of Dufur, east of Mt. Hood) is quoted in an 1876 agriculture report that he had cut down a Douglas fir 321 feet in length and 6 feet 4 inches diameter, 30 feet from the ground. It can be assumed that this tree was removed by Mr. Dufur on his residence of East Portland, near the Columbia river, north-east of Rocky Butte, where he cleared his land of the tall timber, built his own cabin, and started farming along the Columbia slough between 1859 and 1872, in the present Parkrose neighborhood.

Report of the Commissioner of Agriculture for the Year 1876 - U.S. Government Printing Office, 1876 pg 181.jpg

Report of the Commissioner of Agriculture for the Year 1876 – pg 181.

Other big trees approaching 300 feet were eluded to by Portland pioneer Harvey Whitefield Scott, who wrote about the town’s remaining big trees, and how it looked in the early settlement period of the 1850’s and 60’s – in his book, “History of Portland” 1890 pg 93, Settlement and Early Times:

“How it looked at Portland then was about how it looks now at any one of the score of river villages in the woods to be seen on the lower Columbia. The forest was a little notched. Grand trees lay almost three hundred feet long on the ground, and so big and burly that the settler felt grimly after his day’s labor in chopping one down, that he had only made matters worse by getting it in the way…”

JamesRobertCardwell

Dr. James Robert Cardwell was Portland’s first dentist, and later became president of the Oregon Horticultural Society.

Dr. James Robert Cardwell, President of the Oregon Horticultural Society, and Portland’s first dentist, arrived in Oregon in 1852, living six years in Corvallis. In 1858 he moved to Portland, eventually acquiring some properties in the Portland area, and clearing the land for his gardens.  Of the Douglas fir trees, he wrote:

“The trees of our forests, owing to the favorable influences referred to, are of rich, dark green foliage, rapid growth to enormous proportions, commonly from 3 to 6 feet in diameter, 350 feet high, sometimes more, and 185 feet to the first limb. This I state from actual measurements from trees prone on the ground.”

– Our Conifers Economically Considered. By Dr J.R. Cardwell – 5th Biennial Report of the Oregon Board of Horticulture, 1899 pg. 544-549.

 

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Our Conifers Economically considered, Dr. J. R. Cardwell – 5th biennial report of the Oregon board of Horticulture, 1899 pg. 544-549

Dr. Cardwell continues, with a description of what the trees of Portland, Oregon looked like on his property:

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Our Conifers Economically considered, Dr. J. R. Cardwell – 5th biennial report of the Oregon board of Horticulture, 1899 pg. 546

Another great Douglas fir 330 feet tall was removed by W. F. Tracy, on his property north of Portland, in Camas, Washington along the Lacamas headwaters.

The Vancouver independent. (Vancouver, W.T. [Wash.]) May 06, 1880, pg 5

The Vancouver independent. (Vancouver, W.T. [Wash.]) May 06, 1880, pg 5

A 300 foot tall Douglas fir was also felled on the Ezra fisher land claim, east of present day Oregon City.

The Quarterly of the Oregon Historical Society - Oregon Historical Society, 1916 pg 297

The Quarterly for the Oregon Historical Society, 1916. pg 297.

Other Fir trees between 250  to 300 feet high were measured at present day Oregon City by early pioneers. Col. James Clyman, then residing at Willamette Falls, Oregon wrote a letter to Mr. Hiram Ross on Oct. 27, 1844 telling of the trees,

One tree that I measured a few days since, is six feet four inches in diameter and 268 feet long. The tree was felled with an axe last summer.

Then there is this amusing report of a boy free climbing a 260 foot Douglas fir out in Beaverton, Oregon in 1894!

Hillsboro independent.  September 14, 1894 Pg 3

Hillsboro independent. September 14, 1894 Pg 3

Accounts of fir and Cedar trees 350 to 400 feet tall, and 18 to 20 feet in diameter were even reported in some early newspapers – trees along Kalama, Washington, and a grove of enormous fir and cedars estimated at over 350 feet high and 20 feet diameter near Latourell, Oregon and the Hood river, north of Mt. Hood.

The Corvallis gazette.  July 04, 1890  Image 1

The Corvallis gazette. July 04, 1890 Image 1

Sangamo Journal - Illinois State Journal, 20 May 1847 pg 1

Sangamo Journal – Illinois State Journal, 20 May 1847 pg 1.

A report by L. Ferdinand Floss (A resident of Multnomah County, Oregon) of gigantic trees over 20 feet in diameter, and 350 to 400 feet high near Latourell, Oregon was printed in the Morning Oregonian, of Portland on June 14, 1900 page 10. A follow up article was printed in the Oregonian, the next day saying the find will no doubt be checked by an agent of the National Forestry Department. On November 29, 1912 the Oregonian printed a report from George T. Prather who confirmed that the big trees were still to be found standing, and that he had seen them.

The Cook County herald. (Grand Marais, Minn.) December 08, 1900, Image 1

The Cook County herald. (Grand Marais, Minn.) December 08, 1900, Image 1.

Portland too, may well have had some of these exceptional trees even higher than 300 – 350 feet, as occasional giants were encountered by pioneers settling the land around Seattle and Vancouver British Columbia over a century ago, sometimes 350 – 400 ft tall. (See my post on Tallest Douglas Fir, and claims of a 465-footer along the Nooksack river, Whatcom Wash. in 1896, and 415-footer north of Vancouver in 1902).

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Tallest Trees in Eastmoreland could be cut down ; Three 150 foot Sequoias

3 Historic Giant Sequoia Trees said to be 158  years old, up to 150+ feet tall, & 7 feet diameter could be cut down in Eastmoreland, S.E. Portland! – by MJ Ewers, 6-28-15.

Official flier to save the giants, from: https://www.facebook.com/PortlandRedwoods?fref=ts

Official flier to save the giants, from: Save the Portland Redwoods – Facebook page

These are the tallest trees in Eastmoreland, and possibly among the oldest. (based on my Google Earth canopy height survey project). I measured the foremost of the 3 giants, at 153- 154 ft with inclinometer from 4 different angles on June 24th. This confirms, and exceeds the Google Earth 3D model of 147 -150 ft. They are approx. 58 – 60 feet in spread, and range from 78 to 83 inches DBH, diameter. (Update: Darvel Lloyd and I measured the circumference of the tallest and largest Sequoia at about 23 -1/2  feet on 6/28/15 — giving an average diameter of 7 ft 6 inches at 4.5 feet above ground).  No trees in Eastmoreland match or exceed 150 feet, based on my survey. You have to go out 1 to 2 miles radius to find taller trees than this in South East Portland. See Map below:

Map 1

The tallest of these 3 Giant Sequoias may well be taller than any other tree in S.E. Portland for nearly a mile radius. Taller than any other trees in Eastmoreland proper, Woodstock Park, or the grove of Douglas firs at the Apostolic Campgrounds in Brentwood-Darlington, You don’t see trees higher than 150 feet except for one or two at Crystal Springs Rhododendron Garden,a few at Kenilworth Park, Mt Scott Park, and Sellwood Park has some firs up to 175+ ft — about 1 to 2 miles away.

Losing some of the tallest trees of inner S.E. Portland would be unfortunate. I figure, that if each of these trees is from 6-1/2 to 7-1/2 ft diameter, range from 140 – 154 feet tall, then they contain about 1,300 to 2,200 cubic feet of biomass in the trunks alone (volume of a cone). You would need a stand of about 15 – 20 big Douglas firs, 120 feet tall and 3 ft diameter each to equal the same amount of biomass as these 3 Sequoias!

  • Neighbors have raised $50,000 to protect the giant trees, but this only delays their harvest by a week! Neighbors and citizens are trying to raise an additional $900,000 to to puchase the property from the developer and possibly turn it into a small park or green space.
  • A Go Fund Me page was created to try and raise enough funds through donations to help save the Giant trees:  http://www.gofundme.com/SaveTheGiants

The Official Facebook page: Save the Portland Redwoods

And WordPress Page: Save the Portland Redwoods



  • My interest in saving these trees: Having been a resident of South East Portland all my life, I had always been impressed with these 3 massive Sequoias which loom high above the Eastmoreland urban canopy. Taking the Bus line 19 up Woodstock hill, these three “wise men” jut out of the Eastmoreland neighborhood with majesty, perched atop Martins street, overlooking the neighborhood — ancient Goliath sentinels, always on guard… to be poetic. I first became aware in 2013- 2014 that these were the tallest trees in the Eastmoreland Neighborhood, while perusing Google Earth’s 3D mode, attempting to find the tallest trees in Portland. (See project on portland’s urban canopy): PDX TREES – Some Notable & Tallest Trees of Portland, Oregon Metro
East Moreland Sequoias

My initial estimate placed these trees at 138 to 147 feet high, based on Google Earth 3D, subtracting the tops, 323 ft, from the DEM ground elevation of 176 ft. However, measuring the tallest of these 3 in person with inclinometer on 6/24/15, indicates they are slightly taller– the tallest approx. 153 ft.

There are dozens of similar old Giant Sequoias sprinkled throughout the Portland metro area– Seven of them are listed as Heritage trees: Heritage Trees of Portland- Sequoiadendron giganteum

PDX Courthouse Seuoia

156 ft + Sequoia at Lownsdale Square.

There are a similar number of giant Sequoias not yet nominated as Heritage trees: A 156+ foot tall Sequoia at Lownsdale Park, in front of the Multnomah County Court House, and a 164 ft tall Sequoia at the 2700 Block of S.E. Harrison, in Milwaukie , near the Crystal Lake Apartments.

2700 Block SE Harrison Sequoia

164 foot Sequoia, S.E. Harrison Street, Milwaukie, Ore.

Harrison St Sequoia, Milwaukie, Ore.

Harrison St Sequoia, Milwaukie, Ore. Subtracting polygon tree ht of 239 ft, from DEM elevation, 75 ft = 164 ft.

Posted in Eastmoreland Trees, Giant trees, PDX Trees, Redwood trees Portland, Sequoia Trees Portland | Tagged , , , , | Leave a comment

UPDATE – Largest Diameter Douglas-fir in Portland!

It now appears that the largest diameter Douglas-fir in the city of Portland resides on Powell Butte Nature Park! On “Earth Day” Tuesday, April 22, 2014 I met up with fellow big tree enthusiast, photographer, and outdoors-man Darvel Lloyd and we visited Powell Butte to measure the largest Douglas-fir trees in the park, the “Heritage tree” and “tree of merit” listed in the city of Portland’s tree registry:  http://www.portlandonline.com/shared/cfm/image.cfm?id=102686 and http://www.portlandoregon.gov/parks/article/461223.

Micah at largest Douglas-fir in Powell Butte Park,4-22-2014, low-res. Photographed by Darvel Lloyd.

Micah at largest Douglas-fir in Powell Butte Park,4-22-2014, low-res. Photographed by Darvel Lloyd.

Heritage Douglas-fir Tree, Powell Butte Nature Park, 4-22-2014, low-res. Photographed by Darvel Lloyd.

Heritage Douglas-fir Tree, Powell Butte Nature Park, 4-22-2014, low-res. Photographed by Darvel Lloyd.

Micah at large fir, off-trail in Powell Butte Park, low-res. Photographed by Darvel Lloyd.

Micah at large fir, off-trail in Powell Butte Park, low-res. Photographed by Darvel Lloyd.

Wading through the four foot high stinging nettles, I brought my elastic tape line and we both measured the circumference of several huge trees which ranged in size from about 18 to 20 feet in circumference! The heritage tree is the largest diameter Douglas-fir in the park, and measured about 20 feet 8 inches in circumference at chest height, or 6 feet 7 inches in diameter! The tree was on a bit of an incline, so the measure could be off by a few inches, but for all practical purposes it is a 6 -1/2 foot diameter tree! Both the heritage tree and tree of merit are 160 to 165 feet high to a broken top — suggesting they both may have been 200 feet tall originally before losing their tops! Not far from this little grove of monoliths, and towards the north side of the park there are numerous healthy 150 to 200 foot tall trees.

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Douglas fir trees of Mt. Tabor Park, Portland.

A Possible new largest diameter Douglas fir in Portland! * (Update: April 22, 2014, the largest diameter Douglas fir in Portland resides on Powell Butte, see follow-up blog post).

Big tree enthusiast, photographer, and outdoorsman Darvel Lloyd recently told me about a very large old Douglas fir he had found while hiking in Mt. Tabor park. Yesterday, Nov. 6, 2013 Darvel Lloyd and I decided to measure this old tree, and found what may be the largest circumference Douglas fir in the city! Using an elastic tape measure we got a reading of about 19 ft circumference, or 6.04 feet average diameter at breast height for an old rugged looking Douglas fir on the southern end of Mt Tabor Park. This tree was on quite a bit of a slope so the measurement was tricky. The top of this old tree had long ago been blown off, but it now has a healthy vibrant crown. There may well be thicker diameter Douglas fir trees in Forest Park, and the outlying parks of Portland, but as it stands the largest heritage Douglas fir trees officially recognized within city limits are all a trifle under 6 feet diameter, making this old Mt. Tabor tree a potential new record! Preliminary measurements with my inclinometer showed it to be about 166 feet high.* I brought along a 100 ft open tape reel, and Darvel and I measured down hill, a distance of 200 feet from the tree to get a measurement reference for my inclinometer.  The hill was quite steep, about 58 feet of rise over 200 feet distance, so I will go back to the site to get several more height readings from different angles.

Photo taken by Darvel Lloyd.

Big tree on Mt Tabor. Photo taken by Darvel Lloyd.

Big tree on Mt Tabor.

Big tree on Mt Tabor. Photo by Darvel Lloyd.

Micah at Mt. Tabor's largest Douglas fir, 11-6-13, low-res.

Micah at Mt. Tabor’s largest Douglas fir, 11-6-13, low-res.

Darvel at largest Douglas-fir in Mt. Tabor Park, 11-6-2013, low-res.

Darvel at largest Douglas-fir in Mt. Tabor Park, 11-6-2013, low-res.

Rare naturally regenerated DF seedling 20 ft SW of big Tabor Fir, 11-6-13, low-res.

Rare naturally regenerated DF seedling 20 ft SW of big Tabor Fir, 11-6-13, low-res. Photo by Darvel Lloyd.

The largest tree on Mt Tabor, 6 ft diameter, 19 ft circumference.

The largest tree on Mt Tabor, 6 ft diameter, 19 ft circumference. Approx. 166 ft tall*. (Ht was measured on a 30% slope, and the Google Earth 3D map shows this tree to be closer to 150 ft tall, so I need to re-measure its height again).

An interesting side note was a rare naturally regenerated Douglas fir seedling just 20 feet down the hill of the big tree! Darvel told me the park is entirely void of seedlings, so this is an encouraging find! We also measured several other large Douglas fir and found them to be in the 4.5 to 5.5 feet diameter range. A large fir just across from the Parking lot, and west of the covered picnic area was at least 5.5 feet DBH, and from a quick preliminary measurement I took it was about 160 feet tall. Several other trees Darvel and I measured in the park agreed very well with the Google Earth 3D heights to within a couple to several feet. So I think it’s safe to say the Google heights are often 95% accurate or more.

Some big trees I have mapped in Mt Tabor Park using Google earth 3D.

Some big trees I have mapped in Mt Tabor Park using Google earth 3D.

The tallest tree in Mt Tabor park that I have been able to locate using Google Earth is a 185 footer located in the bottom of the gulch on Salmon Way.

Tallest trees in Mt Tabor located in gulch on Salmon Way, just south of the picnic area.

Tallest tree in Mt Tabor located in low area on Salmon Way just south of the picnic area.

Tallest Mt Tabor fir

Tallest Mt Tabor fir

Using my inclinometer, I measured the tallest tree from 4 separate vantage points, and they all were within a couple to a few feet of the Google Earth measurement of 185 ft. This tree is only approx. 42 inches, or 3.5 feet in diameter. However, I am expecting that taller trees could be located in this park along the sides of the hills, or in this same ravine. I am hoping to find a 200 footer!

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