2.13 High Priority Areas and Actions
Implementation funds for
watershed protection and restoration projects in the near future will be scarce. It
is important therefore, to prioritize efforts to achieve the most benefit. To
begin focusing efforts of the Johnson Creek Watershed Council in terms of restoring
watershed processes to maintain a healthy and sustainable watershed, high priority
areas were defined and include:
- Areas of existing high quality core habitats and refuge areas. These areas will be the focus of protection efforts to ensure no further degradation.
- Areas that contribute to or affect processes and watershed functions and provide the highest restoration benefit.
- Areas that are expected to see significant benefit if protected or restored and where existing opportunities exist:
- Implementation funds exist or significant planning efforts are already underway, or
- A key watershed function can currently be protected or restored and could significantly reduce future risks, or
- A focused concentrated effort could greatly benefit, open other doors, or provide additional opportunities.
- Areas that are known contributors of water quality problems or degradation to downstream core habitat areas or refuge areas.
High priority areas are shown on Figure 14 (PDF, 791 KB).
2.13.1 Protection
Protection values as used
within the EDT model are the values of protecting a stream section from further
degradation. The protection value indicates the decline in abundance in Johnson
Creek coho salmon populations that would occur if the section were degraded,
and represents the habitat value presently provided by the section.
Evaluations of habitat conditions
in Johnson Creek indicate that the best remaining habitat occurs in upper and
middle Johnson Creek sections. One of the highest priorities for bringing back
salmon in Johnson Creek is to protect these areas from further degradation. Priority
areas for protection include Reaches 4-5 (Tideman-Johnson), Reach 8 (82nd
to I-205), 10 (SE 106th to SE 110th), and Reaches 12-16 (Brookside to Palmblad
Road). Preliminary findings from the EDT Model point to the middle and upper
sections of the creek as providing the greatest capacity and productivity for
salmonids, and therefore the best areas for habitat protection efforts. Specifically,
the section of Johnson Creek from Butler Creek to Hogan Creek (ODFW Reach 16)
has the highest quality habitat along the entire mainstem and should receive
additional protection measures. In fact, the EDT assessment of Johnson Creek
habitat relative to coho salmon indicated that virtually all successful life
history trajectories calculated originated from a two-mile stretch of the creek
from about Gresham’s Main City Park up to Hogan Creek. Due to the fact that
overall productivity within Johnson Creek is relatively low and nearly all the
production is somewhat dependent on these areas, protecting them is a high priority
(McConnaha, 2002). The City of Gresham is proposing to develop an industrial
area just upstream of this reach. Planning efforts are underway for this area
and are critical for proactively protecting and minimizing downstream impacts
to high priority protection reaches. .
Other priorities include
the protection of additional high quality reaches in the middle sections of
Johnson Creek, finding additional funds for the willing seller programs, and
ensuring that future development in the Pleasant Valley, Damascus, and Springwater
annexation areas do not degrade habitat (Mudbug/Prescott 2002).
The highest priority protection
needs include:
- Protect the highest quality habitat core areas and current fish usage areas
- Johnson Creek (Tideman-Johnson – Reach 4-5)
- Johnson Creek (Butler Creek to Hogan Creek - Reach 15-16)
- Crystal Springs Creek
- Kelley Creek (mouth to Clatsop Creek), and
- Lower Hogan Creek
- Other refugia areas
- Protect those areas that are threatened by future development within the urban growth boundary and expansion areas.
- Protect to ensure a diversity of habitats exist so that there are multiple nodes with high quality habitat dispersed along Johnson Creek and throughout the watershed.
- Protect existing off-channel and known over-wintering habitat or areas with stable wintertime flows (Crystal Springs Creek, Brookside, etc.).
- Protect remaining “pristine” areas on slopes.
2.13.2 Restoration
Restoration value as described
within the EDT modeling process is the benefit that could be gained by restoring
a given section. It indicates the increase in abundance in Johnson Creek coho
salmon populations that would occur if the section were restored, and represents
the increase in watershed function gained by restoring each section. Evaluation
of habitat conditions in Johnson Creek indicate that middle and lower Johnson
Creek have lost much of their historical habitat potential, and would provide
the greatest benefit to salmon in Johnson Creek if restored. Specific reaches
that will provide the most benefit from restoration include Reaches 4-5, 8,
and 12-14 in Johnson Creek, Crystal Springs Creek, Kelley Creek from the mouth
to Clatsop Creek, and those areas that are presently contributing known and
ongoing water quality problems downstream including Johnson Creek Reaches 17-23,
Sunshine Creek, and Kelley Creek. Additional findings from the EDT Model point
to the middle and lower sections of Johnson Creek as the best locations to receive
the benefit of restoration efforts located nearby or upstream. Restoration activities
should address the lack of large wood in the creek, grading of banks and lining
of channels as a result of WPA work, high summer water temperatures, excessive
sediment loading and sedimentation, and lack of food sources. Restoration priorities
include funding projects identified in the Johnson Creek Restoration Plan, especially
those in the middle section of Johnson Creek, implementing the Westmoreland
Park Restoration project to remove a duck pond, and addressing other well-known
heat sources in Crystal Springs Creek (Middaugh/Prescott 2002).
The highest priority restoration
needs include:
- Expand and restore core habitat areas including Johnson Creek Reaches 4-5 and expand outward to include Crystal Springs Creek, and Johnson Creek Reaches 15-16 and expand outward to include Kelley Creek;
- Restore off-channel and over-wintering habitat areas;
- Improve quality of reaches that connect habitat core areas including Johnson Creek Reaches 12-14, and off-channel habitats to the main channel;
- Address watershed wide water quality problems such as sediment, temperature, toxics, and bacteria (focus on upstream sources including Johnson Creek Reaches 17-23, Sunshine Creek, and Kelley Creek that are contributing to problems in downstream habitat core, refuge, and high priority areas). Start with small early action and demonstration projects aimed at sediment and temperature control once sources are identified.
The following is a brief
summary of Habitat Attribute Priorities from EDT Model Analysis:
Lower Johnson Creek Segment
- Habitat Diversity
- removal of WPA
- add Large Wood
- restore riparian
- Temperature
- cool Crystal Springs
- Sediment
- probably derived from upstream sources but need to identify
any local sources
- Channel Stability
- removal of WPA lining
- add large wood
- Pollutants
- identify local sources
Middle Johnson Creek Segment
- Habitat Diversity
- removal of WPA lining
- add large wood
- restore riparian
- Sediment
- many upstream sources contributing to depositional
areas
- Temperature
- poor riparian areas
- no low flow channel due to WPA lining
- Flow
- little winter flow refugia. Remove WPA lining to form low flow channel
- Food
- minimal and more than likely a reflection of significant sediment and water quality problems
Upper Johnson Creek Segment
- Sediment
- many local sources need to be identified and controlled
- Habitat Diversity
- need to increase large wood
- Flow
- summer base flows are a problem could be buffered by increasing habitat, complexity, and protecting and restoring riparian areas
- Food
- minimal and more than likely a reflection of significant sediment and water quality problems
- Temperature
- downstream temperature problems start here. Protect and restore riparian especially in headwaters and tributaries.
2.13.3 Inventorying and Monitoring
The top-tier priority inventorying
and monitoring activities identified by the Watershed Assessment include (see
Chapter 5 for a list of all high priority monitoring projects):
- Conduct Total Suspended Solids (TSS) and Turbidity monitoring to identify point and nonpoint pollution sources.
- Baseline monitoring of E. coli bacteria levels to support establishment and implementation of Total Maximum Daily Load (TMDL).
- Identification of sources of toxics.
- Perform EDT modeling for Cutthroat Trout.
- Additional fish surveys to determine presence and extent of use of all tributaries.
2.13.4 Public Policy and Rules
The top-tier priority activities
for developing or implementing public policies and rules include (see Chapter
5 for a list of all high priority public policies and rules):
- Particpate in creation of concept and implementation plans for the Springwater Concept Plan.
- Support implementation of Clackamas County Water Environment Services (WES) new Development Standards related to Erosion Prevention and Sediment Control.
- Support implementation of new Development Standards related to City of Portland Title 10 – Erosion Control.
- Participate in creation of concept and implementation plans for the Damascus Concept Plan.
- Participate in creation of concept and implementation plans for the Pleasant Valley Concept Plan.
In addition, provide long-term sustainable funding sources for conservation
programs and land acquisition. Priority Land Protection and Acquisition areas
include:
- Confluence of Sunshine, Badger, North Fork Johnson Creek and the mainstem of Johnson Creek
- Just downstream in Reach 17 to connect to Reach 16
- Large wetland complex in the middle of Sunshine Creek
- Errol Heights Creek and Johnson Creek Oxbow areas
- Small perennial unnamed tributary (referred to as “Wheeler Creek”) and the confluence of the mainstem Johnson Creek
- Lents area east of Freeway Land Company and south of Foster
- Lents area west of I-205
2.13.5 Public Involvement and Education
The top-tier priority activities
to reach out and engage the public include (see Chapter 5
for a list of all high priority public policies and rules):
- Implement Lower Willamette Agricultural Water Quality Plan.
- Implement Landowner Outreach Program in Upper Johnson Creek.
- Work with private landowners to restore creek and riparian areas to provide flood storage and improve habitat and water quality in Middle Johnson Creek.
- Implement watershed wide construction BMP program.
- Implement a comprehensive stormwater/watershed Public Involvement & Education program that includes information, education, involvement, and stewardship.
2.13.6 Summary
For watershed action implementation
to be successful, restoration and protection actions need to be prioritized
in terms of need, effectiveness, and effect on future actions and programs. Actions
need to be sequenced so that implementing one doesn’t impact the effectiveness
of another. As suggested in the City of Portland’s Framework for Integrated
Management of Watershed and River Health the following elements and their order
is a matter of importance:
- Protect existing populations and their habitats. Rebuilding an existing population is far more likely to be successful than reintroducing a population that has been lost.
- Reconnect favorable habitats. This allows existing populations to provide ‘colonists” that can reestablish satellite populations in nearby habitat where populations have been extirpated.
- Identify and control sources of degradation. Causes of degradation should be identified and quantified before their impacts within the watershed are addressed.
- Restore the processes that maintain watershed health.
- Normalize flow and hydrology;
- Restore physical habitat;
- Improve water quality; and
- Reestablish biological communities.
Other activities that require
attention, program development, additional assessment and need to be implemented
generally include:
- Water quality improvements in areas that are upstream and contributing to high priority areas;
- Low flow augmentation and irrigation efficiency improvements;
- Channel and floodplain reconnection;
- Fish passage improvement and connectivity.