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Forest Research and Outreach Blog

Trends in Harvest Levels and Stumpage Prices in Coastal California

Volume Harvest Trends

California’s North Coast, covering the four counties of Sonoma, Mendocino, Humboldt and Del Norte, is an important forested region of the state, with redwood and Douglas-fir forests occupying a dominant place in these forests. Since 1948, harvest levels have ranged from a high of 2.8 billion board feet in 1955, to a low of 169 million board feet in 2009 (Figure 1). There have been significant fluctuations from year to year as a result of market variability, policy constraints, and changing landowner demographics.

Figure 1. Trends in timber harvest on the North Coast of California: 1948 to 2010

Figure 2 compares the total state harvest in California to harvest in the North Coast from 1978 to 2011. The North Coast represents 21 to 40 percent of the total statewide harvest over this time period. The species harvested changed from an predominance of old growth timber in the early part of this period, to an exclusively young growth timber harvest today. In California, the amount of timber harvest on federal lands has declined dramatically with changing federal policies, and currently represents slightly less than 12 percent of the total volume harvested statewide, despite the fact that around 50 percent of the total commercial forest acreage is in federal ownership. On the North Coast, virtually all volume harvested takes place on private land, with no year having over 2 percent public harvest since 1998.


Figure 2. Comparison of North Coast timber harvest to California Statewide harvest: 1978-2011

Stumpage Price Trends

Stumpage prices are reported annually by the State Board of Equalization as part of the basis for payment of yield taxes. Figure 3 shows the fluctuation of prices for young growth redwood and Douglas-fir, expressed in real 2011 dollars, after deflating with the Producer Price Index. These are the two major species harvested on the North Coast. The trend line is also shown for these price series.

Figure 3. Trends in redwood and Douglas-fir stumpage prices (real dollars, 2011).

From 1978 to 2011, there was a general upward trend for both redwood and Douglas-fir. On average, real redwood prices increased by 2.4 percent annually, and real Douglas-fir prices increased by 0.9 percent over this time period. There was a rapid increase in prices for redwood from 1984 to 2000, with real price increases over this time period of 10.2 percent. Douglas-fir also had rapid real price increases from 1984 to 1994 of 17 percent. However, prices been flat to declining since 2000 for redwood (9 percent real price decreases), and since 1994 for Douglas-fir (6 percent real price decreases).

Stumpage price trends have had a general upward trend over the past 30 plus years, although there has been tremendous price volatility over this period, amounting to year to year variability of minus 30% to positive 70 percent annually for these two species. This shows that landowners need to have flexibility in the timing of log sales from their properties in order to be responsive to market conditions.



Redwood represents the most valuable tree species in California, and has a unique niche for fencing, decking, and paneling, and is tied in with homeowner remodeling, and is less tied in with the housing market. Douglas-fir is more of a commodity species, and is closely linked with  pine and Douglas-fir from other regions of North America, and is highly correlated with the strength of the housing market.

The North Coast is a major forest products region in California, but has seen a very significant downturn in the amount of timber harvest over the past decade. Harvest constraints, brought about by endangered species and watershed protection standards have been partly the cause, as well as the economic recession in the country. These trends will have a major effect on the financial returns for private forest owners in the North Coast. 

Posted on Tuesday, October 30, 2012 at 2:27 PM

Forest lands may benefit from active restoration after wildfire

100 percent tree mortality caused by the Angora fire, August 2007.

In the many forested areas where wildfires are currently burning, the question will soon arise: What should be done after the fire goes out? That depends on the severity of the burn and land owner goals.

For high severity burns where very few or no live trees remain to provide seed for the next generation, forest recovery can take a very long time. Typically forest landowners want to restore their lands to a forested condition as quickly as possible. In that case, an active approach can help them reach their goal sooner.

The California Tahoe Conservancy has just released a report on the outcomes of active restoration of 40 acres of Conservancy lands where all trees were killed by the 2007 Angora fire in South Lake Tahoe. That fire burned 3,100 forested acres as well as 250 homes.

Fire-killed trees were skidded to a landing and taken to a lumber mill, September 2007.

Post-fire Conservancy goals were to re-establish a native forest, reduce hazards posed by dead trees, and avoid water quality impacts. Contractors cut large dead trees, skidded them to a landing, loaded them on a log truck and sent to a nearby mill. Some large dead trees were left on site to provide wildlife habitat. Small trees were ground up (masticated) and left on site to control erosion and suppress competing vegetation. Then one- to two-year-old native conifer seedlings were planted.

The report's authors estimate this active approach has hastened the return to a forested condition in the area by about 60 years. This is because planted seedlings are growing quickly while there are few naturally sprouting tree seedlings in adjacent untreated areas and these face competition from vigorously growing native brush that was stimulated by the wildfire. Soil monitoring showed no compaction by heavy equipment during tree removal and minimal soil erosion. Woody mulch left on site was also effective at suppressing brush to give newly planted tree seedlings a competitive edge.

Landowners looking for guidance on post-fire forest management are encouraged to download the free UC Cooperative Extension publication “Recovering from Wildfire: A Guide for California Landowners  and consult the UC Center for Forest Research and Outreach website at http://ucanr.edu/forestry.

Small trees being masticated to provide erosion control and brush suppression.
Replanting Conservancy land after dead tree removal, September 2007.
Jeffrey pine seedling planted after the Angora fire in 2007.
herbaceous growth on CTC land 2010
Herbaceous growth on California Tahoe Conservancy land in 2010.
Posted on Wednesday, August 22, 2012 at 11:42 AM

Tanoak and Sudden Oak Death

Will tanoak die out – is it worth saving? Tanoak (Lithocarpus densiflorus) is a California native hardwood tree common in the forest of Northern California and susceptible to Sudden Oak Death (SOD). Since tanoak is not a commercial tree should we just let it die? Tanoak has stumped manufacturers and researches alike trying to find a place for it in the market. It has many first-rate material properties but it has a reputation of being very difficult to dry without creating serious drying defects. The Fifth Sudden Oak Death Science Symposium was held in Petaluma, CA from June 19-22 to address the current knowledge of SOD and devoted a day to shed light on tanoak’s worth. The conference brought together scientists, researchers, and other experts to share information and solutions. More information on the conference presentations can be found at the conference website.

Friday’s session focused on tanoak’s importance and value. Its history and background were discussed first, summarizing its uses, advantages vs. disadvantages and economic viability. This was followed by a discussion of the efforts and studies being done to prevent tanoak trees from succumbing to SOD. The conference did an excellent job of connecting people, bringing people from different fields together to share knowledge and expertise on how to use and protect tanoak.

A presentation, titled “Tanoak as a Forest Product Recourse: Past, Present, and Future”, by John Shelly and Steve Quarles, two University of California forest products experts was presented by Steve, currently employed at the Insurance Institute for Business & Home. This presentation looked at tanoak as a potential lumber resource and compared it to more traditional hardwood species. Tanoak has a rich history as an acorn food source for Native Americans, a source of tannin—a natural chemical used to produce leather from animal hides, firewood, lumber, and pulp for paper. Compared to Northern red oak (a benchmark species), tanoak is stronger and harder, however it is more difficult to dry and exhibits greater tangential and radial shrinkage. More information is available at the UC Woody Biomass Hardwood Utilization webpage. An accumulation of experience from various researches and practitioners has led to core knowledge of best practices. These include avoiding the dark-colored core zone as it cannot be dried without defects, quarter-sawing lumber to improve dimensional stability, and using a drying schedule of air drying to 30% MC followed by a mild kiln-drying schedule. Additionally restraining the movement of wood as it dries by placing a uniform weight of about 150 lbs/ft2 on top of the lumber stack as it dries is known to be beneficial in reducing warp.

Some people are concerned that removing trees that are inflicted with the SOD tree disease pathogen will increase the risk of spreading the disease. Research reported by Shelly however, indicated that the very low risk of spreading the disease when fresh cut wood is transported to different locations disappears entirely once the wood is processed and dried. In fact, using diseased wood my even have some positive benefits. Further information is presented at: http://ucanr.org/sites/WoodyBiomass/HardwoodUtilization/SOD/ .

One such potential benefit is the presence of spalted wood –an early stage of decay—often found in SOD diseased trees. This, combined with the insect tunnels often associated with SOD infected trees creates an appealing aesthetic appearance, often called character wood. This character has the potential to set it apart from other woods. However, it was noted that spalted wood should not be used for flooring because the hardness of the wood with incipient decay is greatly reduced making it too soft for flooring. The interesting appearance of spalted wood can be very attractive in furniture, art, and craft uses. This could create a niche market for SOD-diseased tanoak that is unique, appealing to select buyers.

The participants in the tanoak session also had the opportunity to view an exhibit of a display of pictures, a slide show, and examples of tanoak lumber and finished products (e.g. flooring and furniture). The pictures and slide show depicted tanoak lumber being cut and quartered, then dried. Here the audience could see the preparation process—from forest to flooring—as well as examples of drying effects. Many people’s questions revolved around the option of using tanoak for flooring and its expected durability. Another common topic was the amount of unutilized tanoak in California forests. It is clear that there is continuing interest in finding uses for this tree. The UC experts concluded that with expansion of the market and improvements in the processing we could see a dramatic increase in the use of tanoak across California.

Posted on Friday, July 20, 2012 at 11:18 AM

The Forestry Institute for Teachers (FIT) provides fun and informative educational summer learning opportunities for California’s K-12 teachers

For almost 20 years now, UC Forest Advisors and Specialists, along with a dedicated group of volunteers, have been leading summer training opportunities to inspire K-12 teachers to teach about environmental issues.

Living in an urbanized state, few Californians recognize how much they depend on the forest for water, wood products and wildlife habitat, as well as their responsibility for its proper management. Through environmental learning integrated into the educational system, students can discover how to make critical choices about issues such as forest health, ecosystem management, consumerism and local economies.

The goal of the Forestry Institute for Teachers (FIT) is to provide California's K-12 teachers with knowledge, skills and tools to more effectively teach forest ecology and forest resource management practices. The program is co-sponsored by UCCE, the Northern California Society of American Foresters, US Forest Service and many other organizations. FIT brings natural resource specialists together with teachers from both rural and urban schools for one week, working side by side to explore the intricate interrelationship of forest ecosystems and human use of natural resources. The science-based curricula explore many subject areas, including environmental science, physical science, social science, biology, forestry and history. At each session, more than 40 local resource professionals representing many disciplines are invited to teach components of the course. UCCE advisors and specialists serve as co-directors and teachers. FIT offers annual institutes in three Northern California locations: Humboldt, Shasta and Plumas Counties. Back at their schools, FIT participants conduct in-service training for colleagues, and develop forestry education projects with their students.

Since 1993, over 1,300 K-12th grade teachers, evenly spread among grades, have participated in FIT. About one-third of the teachers come from Southern California, one-third from central and rural California and one-third from the Bay Area and Sacramento. Their responses to the course emphasize (1) new insight into the complexity of forest management and (2) activities and lessons that prove valuable in the classroom. Because teachers have utilized the activities and information gained from FIT in the classroom, students are improving their knowledge and decision-making skills. FIT has received a number of environmental education awards.

A graduate from the 2011 program shared, “I came up here expecting more of a science based workshop but left with so much more. Yes, science based but more of an understanding of our forest, the timber industry and ways to implement this information into the classroom- even when we don’t live near a “forest” environment. The web of involvement (people, agencies, policies, environmental groups, landowners) to most people is not known. I have gained a greater appreciation for those who are involved. Taking this back to the classroom will be much different than just teaching “the surface” (leaves, water, habitats). Now I will have the “meat” to all these lessons I have been teaching for years. Thank you for a wonderfully organized and extensive week! I will be taking what I have learned not only to my students but to the staff of my school, my friends and my family.”

While another stated; “Awesome! I really appreciate this opportunity. The FIT program is one of the BEST training courses I’ve ever participated in- great mix of perspectives & activities. It’s obvious that you’ve been offering the program for many years- it’s fine-tuned & perfect. Thank you!”

Four week-long sessions are offered in California.  To learn more about FIT visit:  www.forestryinstitute.org.

Learning how to read a tree core.


FIT teachers busy learning to identify amphibians.


Learning to measure the diameter of a redwood tree.


Sampling gravel to learn if conditions can support fish spawning.

Posted on Tuesday, July 3, 2012 at 9:45 AM

Improving Your Home? Consider Fire Risk When Planning Spring Home Improvements

Most people planning home improvement projects take into account how improvements will affect the home’s ability to withstand rain and weathering. In California we should also consider the threat of wildfire when planning home improvement projects this spring

Most homes that burn during wildfires are ignited by flying embers landing on combustible material on or near homes. A wildfire passes by a home quickly, usually in a few minutes, while the exposure to flying embers can last for an hour or more. Therefore, activities homeowners undertake to make their home less ignitable from embers do the most to ensure its survival.

The most important home upgrade homeowners can do to reduce wildfire risk is to replace wood shake roofs with Class A roofs. Single-paned windows should also be replaced with dual-pane windows (with at least one pane being tempered). Combustible siding can also be vulnerable, but replacing it with non-combustible siding is less important if you have done a good job of locating and maintaining vegetation near your home. Replacing combustible decks with noncombustible decking products will also reduce risk.

Even though these upgrades are expensive, they reduce the likelihood that you will experience the cost and trauma of losing a home in a wildfire. If you cannot afford to undertake these projects this year, there are less expensive projects you can take on to reduce wildfire risk. These center on maintaining your home in good condition by replacing worn boards , sealing cracks in locations where embers can enter the home, and protecting vulnerable areas with non-combustible materials and coverings.

Even if you have already upgraded your home to resist fire by installing a new roof, windows, or deck, it is important to maintain those home components in their proper condition so embers cannot gain entrance to the home. Creating defensible space by clearning flammable vegetation and debris is also crucial to reducing your wildfire risk. For more information on the performance of building materials in a wildfire, please see http://firecenter.berkeley.edu/ or www.extension.org/surviving_wildfire. For more on creation of defensible space, contact your local fire agency.

              Homeowner installing screens under a deck to reduce the likelihood of ember intrusion 
                                                during a wildfire. Photo by Steve Quarles.

                      Suggested home maintenance projects to reduce wildfire risk


  • Plug roof openings: Install end-stops (bird-stops) at the edge of your roof if it has a gap between the roof and the sheathing (as with a clay barrel tile roof).
  • Protect roof edges: Install metal angle flashing at the roof edge to protect the roof sheathing and fascia board, especially if there are gutters attached that can hold combustible pine needles. Even a Class A roof cannot protect the wood sheathing under it if the roof edge is unprotected.
  • Protect roof eaves: “Box in” your open eaves with sheathing, such as a fiber cement soffit or higher grade plywood.
  • Skylights: Particularly on steep or flat roofs, replace plastic skylights with skylights that use tempered glass in the outer pane.


  • Maintain siding: Fill gaps in siding and trim materials with a qood quality caulk help keep out embers. Replace warped or degraded siding.


  • Protect vents: Inspect the vents into your attic and crawl space. Make sure the screens are in good condition. Replace ¼ inch mesh screen with 1/8 inch mesh screening.


  • Maintain decks: Replace deck boards that are less than an inch thick with two inch thick boards. Remove combustible materials from under the deck.
  • Protect combustible siding: Install metal flashing between a deck and combustible siding to protect it from accumulated debris that can ignite during ember attack.
  • Remove flammable material from under decks: If your deck is made from wood or wood-plastic lumber decking, remove combustibles (firewood, lumber, etc.) from under the deck.


  • Replace gates: Replace combustible gates and sections of wooden fences within five feet of the house with noncombustible materials and components.


  • Adjust garage doors: Your garage door can be very “leaky” to embers. Since most people store combustibles in their garage, make sure your garage door is well sealed at the edges.
Posted on Monday, May 21, 2012 at 3:13 PM
Tags: California (7), home improvement (1), wildfire (39)

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