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Draft NRMP Section 5.b Bassett Creek Bassett Creek Nature Area Location: 2130 Zane Avenue Nature Area Size: 7.61 Acres Description Bassett Creek Nature Area is a medium sized nature area that is centrally located, and provides a great connection between neighborhoods and commercial areas. It is located between residential neighborhoods on the north end near Vale Crest Road and Zane Avenue, and commercial areas on the south end along Duluth Street. The west side of the park abuts residential homes, while the east side is adjacent to a Minnesota Department of Transportation truck station and an office building. While the nature area is not considered large, it provides an important function by serving as a natural corridor along Bassett Creek, which is one of the primary features within the nature area. The adjacent uplands contain numerous specimen oak trees, and are a great example of the historic hardwood forests that were present in Golden Valley prior to settlement. The Bassett Creek Nature Area is separated by Bassett Creek, which flows from south to north through the nature area. It is Bassett Creek Nature Area's primary feature. Much of the Bassett Creek shoreline has been stabilized for erosion control. A storm water pond is partially located within the park on the north side. This pond treats water from Vale Crest Road prior to discharge into Bassett Creek. Access at the north side of the nature area is from Vale Crest Road or Zane Avenue. From Duluth Street, the park can be entered through a single trail and stairway. At the top of the stairway, the trail splits into an upper and lower segment, which joins at the north side to make small loop. The lower trail segment provides several vantage points in close proximity of the creek. The upper trail takes a higher path along the wooded area, and has views of the nature area, but also runs along a fenced property line. A picnic area is present on the northwest side of the park, and contains regularly mowed lawn and a few park amenities including as waste receptacle, picnic table, and educational sign. Bassett Creek separates the picnic area from the rest of the Nature Area. Forest and Woodlands The majority of Bassett Creek Nature Area is wooded. Along Bassett Creek, the woods are floodplain forest, dominated by mature box elder, silver maple, green ash, and American elm GVRM Plan 2015 BASSETT CREEK NATURE AREA page 1 trees. The eastern half of the park is located in a natural bluff, which is dominated by several very old bur oak trees, and other native hardwoods. The top of the bluff area is sparser, but also contains about 50% cover of native and nonnative hardwoods. The western portion of the park contains a number of large oak trees, and may also be part of an oak savanna along the edge of the historic floodplain. Buckthorn is prevalent along the bluff, and up to the edges of the creek, but is generally composed of younger individuals, and is at a relatively low density. Aquatic Resources Bassett Creek flows through the park, and is visible from numerous vantage points. The creek has been protected with a combination of stone and native vegetation to provide bank stability and erosion control. The channel also splits within the nature area to provide a small hardwood swamp island. Wetlands There is wetland along Bassett Creek, which is composed of a wooded swamp as part of the floodplain. The wetland floods during storm events,and is also near the water table, which assists in inhibiting buckthorn establishment. On the north side of the park, near the picnic area, there is an area that lacks trees and has developed into a shrub swamp. This is a moderate quality area for the composition of the vegetation, but it provides for diversity in habitat, and the dense shrubs protect the banks and slow down flows during flood events. Prairie and Grassland In addition to the wooded portions of the park, there are areas of prairie on the north side, associated with the creek and a berm around the storm water pond. The areas were planted recently and are currently being managed and maintained by a native landscaping company to ensure their success. The eastern portion of the park, at the top of the bluff, contains approximately 50% cover by mixed grassland species, approximately half is composed of native species. Invasive Species Within the nature area, the woods include a large percentage of common buckthorn, particularly on the slopes along Bassett Creek. Buckthorn density has increased since the 2004 inventory. GVRM Plan 2015 BASSETT CREEK NATURE AREA page 2 Reed canary grass is also present along the creek, but is mixed with native species, and is limited due to shading from large trees and shrubs. Table 5.3 Invasive Species Cover Percent Change 2003-2013 Descri•tion %Cover2003 % Cover 2013 % Chan.e Common Buckthorn 30 50 +20 Site Recommendations Natural Resources Manage buckthom (high priority) Buckthorn is prevalent along the east bank of the creek and within the wooded areas. It is a relatively young age of buckthorn, but numerous small individuals are present. The native understory remains present, which provides an opportunity for both management of buckthorn, and encouragement of a native assemblage which is discourage buckthorn establishment. Enhance the hardwood uplands (medium priority) The wooded slope between the two trail levels contains numerous mature oak trees, and some younger desirable hardwoods. In conjunction with buckthorn removal, the hardwood uplands could be enhanced through selective removal and reestablishment of more desirable species. Currently, there is insufficient age structure to allow replacement of the largest trees when they die of natural causes. A balanced age class would ensure that this high quality wooded area remains healthy. Reestablish oakv sa anna (low priority) The southeast portion of the park,near the upper trail, contains an area that is a mixture of grassland and small hardwood trees. Several bur oak trees are present, but most of the trees are of lesser quality. It is possible to remove some of the undesirable trees, and establish an area of prairie with fewer oak trees, and manage a small area of oak savanna. Stabilize erosion along bluff(Medium Priority) Stormwater runoff and erosion along the wooded bluffs in the Nature Area have formed several small channels, some of which have been stabilized through placement of concrete. These GVRM Plan 2015 BASSETT CREEK NATURE AREA page 3 -- I areas can be stabilized by diverting the concentrated flows that are causing the erosion, and reestablishing and revegetating the slopes, which will also improve the visual appeal. Amenities Install entry signs(high priority) Bassett Creek Nature Area has no entry signs. Signs should be installed at each of the main entrances using approved style type. This would be particularly beneficial on the south side, as Duluth Street provides high visibility, even if access is limited. Install interpretive sign (low) There are opportunities to educate the user on a number of topics including wildlife habitat, water quality protection of Bassett Creek and buckthorn removal and native woodland restoration. Upgrade bench (medium priority) The bench within the nature area on the Duluth side of the nature area is functional but worn and should be replaced. An additional bench should be installed on the north side. Both should adhere with an approved bench style for nature areas. This would provide visual continuity within the nature area system and also strengthen user distinction that Bassett Creek is a nature area versus a recreational park. Install trash/recyclable receptacle(medium priority) The trash receptacle is one of the first amenities viewed upon entering the nature area. As such, it should not only provide maintenance functionality and efficiency but should also be attractive and reflect the image of the Bassett Creek Nature Area. They should be located within the nature area; one on the north side on Zane Ave North and the other at Vale Crest Road and one at the Duluth Street Entry. Install pet waste disposal system (high priority) Bassett Creek Nature Area should include waste disposal systems for their dogs; one at each main entry. This not only keeps the park clean and attractive but it helps to maintain the water quality of Bassett Creek. Improve physical access (high priority) GVRM Plan 2015 BASSETT CREEK NATURE AREA page 4 One of the primary deficiencies of the Bassett Creek Nature Area is that it is not easily accessible from one side of Bassett Creek to the other and has an existing trail system that may limit use by people with disabilities. The trail system should be improved to allow greater user access. This may include rerouting the lower trail to avoid having to use the steep stairs, and allow greater opportunity to access the creek and the Nature Area. The City should continue to work with MnDOT to improve drainage and runoff into the Nature Area. Improve visual access (high priority) Another deficiency of the Bassett Creek Nature Area is that it is visible from only a few public areas, and is potentially overlooked due to lack of recognition that the area is there and public use in encouraged. More formal trailheads on the north side both from Zane Avenue and Vale Crest Road and from Duluth Street on the south side would help to make the nature area more visible. This can be done by installing entry signs and other trailhead amenities (See specific amenity options above.) Table 5.4 Bassett Creek Nature Area Improvement Priorities Priority Management Description Action Qty Unit Unit lost (H, M, L) Type Cost OrOnion Floodplain H forest, and Mixed hardwoods Remove/control 5 Acre $2,000 $10,000 adjacent buckthorn slopes Mixed hard Remove undesirable Forest health, trees, establish M woods, east diversity mixed age-class of 4 Acre $2,500 $10,000 side oak trees Southeast, Oak savanna Remove undesirable L trees, mixed age- 3 Acre $5,000 $15,000 upper trail establishment class of oak trees Regrade erosional Erosion channels along the Control M Erosion control bluff and remove 0.5 Acre $4,000 $2,000 concrete Entry sign design continuity through H Amenity nature area system Install signs at entry 3 Each $5,000 $15,000 and make nature points area more visible to the public M Amenity Natural resources Install additional 1 Each *$3,000 $3,000 education; design interpretive sign GVRM Plan 2015 BASSETT CREEK NATURE AREA page 5 continuity throughout along the creek nature area system Bench design Install new benches along the trail at M Amenity continuity throughout appropriate intervals 4 Each $1,500 $6,000 nature area system or at key viewpoints Trash/recyclable Install waste/ M Amenity receptacle design recyclable trash 3 Each $2,000 $6,000 continuity throughout nature area system receptacle at entries Pet waste disposal Install new pet waste M Amenity system at key access disposal system 3 Each $600 $1,800 point Formalize public use Amenity/Trail Improve physical of trail across LOGIS H Access access property at Duluth St NA entrance through easement/agreement Reroute lower trail, Amenity/Trail Improve physical Linear H consider pavement 500 $125 $70,000 Access access Feet improvements *Does not include design fees GVRM Plan 2015 BASSETT CREEK NATURE AREA page 6 �f-' ' ir.... ..,..._ ____,. i,-,_ .1 '''' 'Jr.i. . g .,.. •e..� .Y..r<,R YS M a R eiw Y Y r.s.e d..... tI. t r� + I I' f a 8 _. 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Basset Creek Nature Area- Invasive Speices FIGURE 5.9 Golden Valley Natural Resources Management Plan a d virraws 1.•44- ir•) 4. _ 4 to ._ _ Symbol Key ' t Q Pedestrian Access iE Educational Sign . 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