maclay bridge planning study · 2012. 7. 13. · flammulated owl s3b no bald eagle yes great blue...
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Maclay Bridge Planning Study
Informational Meeting No. 2July 10th, 2012
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Introduction
Introduction of local officials Partners
Missoula County MDT FHWA
Planning team members in attendance Consultant team
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Outline of this Evening’s Meeting
Existing and projected conditions in the Maclay Bridge vicinity
Resource considerations in the environmental scan boundary
Preliminary areas of concern Next steps & conclusion
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Study Vicinity Map
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Existing & Projected Conditions in the Maclay Bridge Vicinity
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Crosses Bitterroot River 2.75 miles west of Reserve Street
River Pines and North Avenue are functionally classified as “collector” roadways by Missoula County
Serves multiple users, including: local residents, landowners west of Bitterroot River, recreationalists, school buses and emergency responders
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Maclay Bridge
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Physical Characteristics Two‐lane roadways (North Avenue and River Pines Road)
One‐lane bridge (Maclay Bridge)
Asphalt surfacing throughout
Access density of 32.4 access/mile
Ten approaches are “public” approaches
Thirty‐seven are private approaches
Curved alignment into and out of existing bridge
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Traffic Counts Ranges from 2,610 vehicles per day (vpd) on River Pines
Road to 2,000 vpd on North Avenue (2010 counts)
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Street Location 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
RiverPines Rd
300 ft Wof MaclayBridge 2300 2060 2300 2130 2410 2460
(a)
2380 2610 2360
NorthAve
300 ft WofClementsRd 1660
(a)
2010
(a)
2140
(a) (a) (a)
2000
(a)
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Roadway Geometrics - Curves
Three horizontal curves do not meet current Missoula County standards
Vertical grades are within the Missoula County Standards (less than 6.0%)
Stopping sight distance acceptable
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Location Feature Value Standard
North Ave W / Edward Ave Intersection
450' SE of MaclayBridge Horizontal Curve 175' 525’
River Pines Rd / Riverside Dr
50' NW of MaclayBridge Horizontal Curve 125' 525’
River Pines Rd2300' SW of MaclayBridge Horizontal Curve 125' 525’
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Roadway Geometrics –Clear Zone
Clear zone is the total roadside border area available for safe use by errant vehicles
This area may consist of a shoulder, a recoverable slope, a non‐recoverable slope, and/or recovery area
Obstacles may be in the clear zone as well River Pines Road ‐ just southwest of the existing bridge
Top of roadway fill slope is between 2 and 4 feet from the edge of the travel lane
Trees and utility poles are found within this area Roadway fill slope in this area is steep and lined with riprap to the
river
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Roadway Geometrics - Widths Determined from field measurements
Surface width, lane width, shoulder width, and number of lanes
Widths Are Of Interest
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Location LanesSurface Width
(ft)Lane Width
(ft)Shoulder Width
(ft)
North Ave WClements Rd toMaclay Bridge 2 31 11 1 (north) / 8 (south)
Maclay Bridge On Bridge 1 14 14 0
River Pines RdMaclay Bridge toBlue Mountain Road 2 22 11 0
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Bridge Crossing
Rated as functionally obsolete, but not structurally deficient
Sufficiency rating (SR)
= 27.3
Health Index = 89.91 Ranks near the bottom
quartile of all off‐systembridges
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Safety (Reported Crashes)
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Future Traffic Volumes Two Methods Available
Average Annual Growth Rate (AAGR)
20 years ahead – look 20 years back…..
TransCad Travel Demand Model
Based on adopted planning documents (land use/zoning/growth policy) and existing transportation system
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Future Traffic Volumes -TransCad
TransCadmodel based on adopted planning documents
Incorporates land use in Target Range Neighborhood Plan and areas to the west of Bitterroot River
Typically preferred for areas with MPO’s
Results:
River Pines Road: 2,610 vpd (2010) to 3,650 vpd (2040)
North Avenue: 2,000 vpd (2010) to 3,100 vpd (2040)
Compared to AAGR: River Pines Rd 4,550/North Ave 2,350
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Resource Considerations in the Environmental Scan Area
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Environmental Resources Geographic Setting
Land Ownership/Management
Land Use
Geological Resources
Soils and Prime Farmland
Water Resources
Wetlands
Floodplains and Floodways
Hazardous Materials
Air Quality
Noise
Visual Resources
Biological Resources
Vegetation
Cultural and Archaeological Resources
Demographics
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Land Ownership/Management
Predominately privately owned land
Public land in environmental scan boundary includes:
MFWP – Kelly Island Fishing Access Site
Isolated Missoula County‐owned parcels
Lolo National Forest
Five Valleys Land Trust –Conservation Easement
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Water Resources
Three predominant surface waters:
Bitterroot River
Clark Fork River
O’Brien Creek
Bitterroot and Clark Fork Rivers are classified as impaired and are section 303(d) listed waterbodies
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Wetlands
National Wetland Inventory (NWI) ‐ based on aerial photo interpretation
NWI definition much broader than regulatory definition (COE)
If a project, or projects, advance, a wetland impact evaluation would be required
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Floodplains and Floodways
100 – Year Flood (base flood for floodplain management programs)
Most of the study corridor
Zone A (no Base Flood Elevations determined)
Zone AE (Base Flood Elevations determined)
Zone X (areas of 0.2% annual chance flood)
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Hazardous Materials
NRIS
Eight UST locations
One LUST locations
One petroleum release compensation site
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Visual Resources
Landscape Character
Visual Sensitivity
Scenic Integrity
Landscape Visibility
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Biological Resources Fish & Wildlife
Vegetation
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Fish and WildlifeThreatened and Endangered Species
Common Name USFWS Status Habitat Requirements
Bull TroutThreatened,Critical HabitatDesignated
Within the Environmental Scan Area, the BitterrootRiver, Clark Fork River, and O’Brien Creek aredesignated as Critical Habitat for bull trout.
Grizzly Bear ThreatenedIn Missoula County include the Seeley, Swan, andJocko Valleys, lower Mission Valley, and portions of theupper Rattlesnake watershed.
Canada LynxThreatened,Critical HabitatDesignated
Habitat for the species does not exist in theEnvironmental Scan Area.
Wolverine CandidateHabitat for the species does not exist in theEnvironmental Scan Area.
Yellow Billed Cuckoo(Western Population)
CandidateThis habitat may be present in the Environmental ScanArea.
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Fish and WildlifeSpecies of Concern
Common Name State RankMNHP Known Occurrences in Environmental Scan Area
Westslope Cutthroat Trout S2 Yes
Hoary Bat S3 Yes
Fisher S3 Possible on Lolo National Forest
Black-backed Woodpecker S3 Yes
Western Skink S3 Yes
Fringed Myotis S3 Yes
Grasshopper Sparrow S3B Yes
Cassin's Finch S3 Yes
Pileated Woodpecker S3 Yes
Lewis's Woodpecker S2B Yes
Flammulated Owl S3B No
Bald Eagle Yes
Great Blue Heron S3 Yes
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Vegetation
Threatened and Endangered Species
One threatened & one candidate identified in Missoula County
Species of Concern
Toothcup (Rotala ramosior)
Common Name
USFWS Status Habitat Requirements
WaterHowellia
ThreatenedKnown occurrences of the species in Montana are all within theSwan River drainage in the northeastern portion of MissoulaCounty.
WhitebarkPine
Candidate This habitat does not exist in the Environmental Scan Area.
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Cultural and Archaeological Resources
Resource NameSmithsonian
Site # Type of Resource National Register Eligibility Status
Stettler Property 24MO05l6 Historic Residence Ineligible
Rice Property 24MO05l7 Historic Residence and Outbuildings Consensus determination of eligibility
Maxwell Property 24MO05l8 Historic Residence and Outbuildings Ineligible
Maclay Property 24MO0519 Historic Residence and Outbuildings Recommended as eligible for National Register
Missoula Irrigation DistrictDitches
24MO0520 Historic Irrigation System Consensus determination of eligibility
Maclay Bridge 24MO0521 Historic Vehicular/Foot Bridge Determined eligible for National Register
Big Flat Ditch 24MO0587 Historic Irrigation System Consensus determination of eligibility
Maclay Ditch 24MO0954 Historic Irrigation System Undetermined
Target Range ElementarySchool
24MO0589 Historic School Listed on the National Register
Site in T13N, R20W, Sec. 35 24MO0209 Lithic Material Concentration Undetermined
Site in T13N, R20W, NW 1/4Sec. 35
24MO1388 Historic Residence Undetermined
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4(f) / 6(f) Name Type of 4(f) Resource Comments /Location
Kelly Island FAS Public Recreation Site 666-acres site located at confluence of Bitterroot and Clark Fork Rivers, managed by MFWP
Rosecrest Park Neighborhood Park9.6 acres located south Spurgin Road between Clement Road and 37th Avenue. Countyownership
Schmautz Park Neighborhood Park4.2 acre, undeveloped parcel located north of North Avenue and west of 42nd Avenue. Countyownership
Target Range School PlaygroundTarget Range School (24MO0589)
Neighborhood ParkHistoric School
10 acre area containing sports fields, basketball courts, and play equipment. Target Range Schoolis listed on National Register.
Dinsmore River Four Conservation Park Bitterroot River island habitat located south of existing Maclay Bridge County ownership
Double R Acres Conservation Park Clark Fork River riparian habitat adjoining Kelly Island FAS. County ownership
O’Brien Cr. Meadows Common Area Conservation ParkO’Brien Creek riparian area located near intersection of Big Flat Road and O’Brien Creek Road.County ownership. Identified in Missoula County Parks and Conservation Lands Plan (1997)
Capi Court Park Unimproved County Park North of Spurgin Road and east of Sierra Drive
Five Valley Land TrustConservation Easements
Wildlife Habitat/Public Use Various locations along Bitterroot River
Lolo National Forest Lands Public Multiple-use Property Southwestern portion of Environmental Scan Area, part of Blue Mountain Recreation Area
Rice Property (24MO05l7) Historic Residence and Outbuildings Consensus determination of eligibility for National Register
Maclay Property (24MO05l9) Historic Residence and Outbuildings Recommended as eligible for National Register
Maclay Bridge (24MO052l) Historic Vehicular/Foot Bridge Determined eligible for National Register. Owned by Missoula County
Big Flat Ditch (24MO0587)Missoula Irrigation District Ditches(24MO0520)
Historic Irrigation Systems Consensus determination of eligibility for National Register
FAS is 6(f) site
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Cultural and 4(f) Sites
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Preliminary Areas of Concern
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Areas of ConcernTransportationTraffic Volumes Existing traffic volumes exceed the AASHTO standard
for a single lane bridge Projected traffic volumes over the next thirty years
(year 2040) are expected to grow by 1,040 vpd (for River Pines Road) and 1,100 vpd (for North Avenue).
Safety A number of crash trends and areas of concern were
identified within the crash analysis area
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Areas of ConcernTransportationTravel Time Without the existing Maclay Bridge in service, travel
times between Community Medical Hospital and the intersection of Big Flat Road/Blue Mountain Road/O’Brien Creek Road/River Pines Road are expected to take:
4.5 minutes longer by travelling via Buckhouse Bridge 18.6 minutes longer by travelling via Kona Bridge.
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Areas of ConcernTransportationHorizontal Alignment Three horizontal curves do not meet current
Missoula County or MDT standards Clear Zones Numerous locations have features within the
horizontal clear zone and are unprotected with no guardrail A notable area of concern exists along River Pines Road
adjacent to the Bitterroot River, where the steep fill slope begins only 2 to 4 feet of the edge of the travel lane
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Areas of ConcernTransportationBridge Functionally obsolete due to the approach geometry
and the narrow single lane bridge width The existing bridge is “load restricted” due to its
present condition Oversize vehicles like school buses and fire engines
which cross the bridge are subject to speed restrictions
There are no dedicated bicycle or pedestrian features on the bridge
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Areas of ConcernTransportationParking Parking has and continues to be a concern in the
Maclay Bridge area Numerous parking resolutions passed by the
Missoula County Commission Numerous records of “911 calls” to the area
Criminal Mischief, Curfew and Loitering, Disorderly Conduct, Disturbance, Suspicious Activity
Extra Patrol Hazardous Vehicle Other Hazard
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Areas of ConcernTransportationWidths Single lane bridge width of 14 feet does not meet
current given existing and projected traffic volumes Roadway widths on River Pines Road, the Maclay
Bridge, and North Avenue do not meet current Missoula County standards for width
There are no shoulders on River Pines Road or the Maclay Bridge
Dedicated bicycle and pedestrian facilities are absent on River Pines Road
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Areas of ConcernEnvironmentalFish and Wildlife Five endangered, threatened, proposed, or
candidate species are listed for Missoula County Two may be likely to occur within the area:
Bull Trout (threatened, critical habitat designated) Yellow Billed Cuckoo (candidate species).
13 animal species of concern for Missoula County were listed
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Areas of ConcernOther ConsiderationsSpeeds Neighborhood residents have suggested that speeds
are an issue on North Avenue, River Pines Road and South Avenue
Traffic Growth Neighborhood residents have expressed concern
over traffic growth through the neighborhood in recent years, and the potential for that to continue
Safety Neighborhood residents have expressed concerns
over the potential for increased vehicle crashes if a new, two‐lane bridge is constructed
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Areas of ConcernOther ConsiderationsNoise Neighborhood residents have expressed concern
over noise impacts due to increasing vehicular traffic through the area
Social Considerations Neighborhood desire to maintain the rural character
of the area and limit traffic growth The Target Range Neighborhood Plan emphasizes
the importance of continued County maintenance of the structure to help preserve access for local and Missoula Valley residents seeking recreational opportunities on nearby lands
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Areas of ConcernOther ConsiderationsSocial Considerations (continued) The Target Range Neighborhood Plan does not
identify the need for a new bridge Project Nomination Missoula County has nominated the existing Maclay
Bridge for replacement using funding from FHWA’s Highway Bridge Replacement and Rehabilitation Program
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Next Steps and Conclusion
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Next Steps Continue study coordination and outreach
Finalize environmental scan
Finalize existing and projected conditions report
Develop transportation system needs & objectives
Identify potential improvement options
Screen potential improvement options based on screening process
Draft corridor study report
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Prepare Planning Study Report
Draft Study Report Available to the public
Posted on website In conjunction with Informational Meeting 4
Typically 3‐week review
Finalize the Study Report
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Conclusion
Questions, answers and/or comments?Study website:http://www.mdt.gov/pubinvolve/maclay/
Study contacts:
Sheila LudlowMontana Department of TransportationStatewide and Urban Planning PO Box 201001Helena, Montana 59620‐1001
Email:[email protected]:(406) 444‐9193
Lewis YellowRobeMissoula CountyOffice of Planning and Grants 435 Ryman StreetMissoula, MT 59802
Email:[email protected] Tel:(406) 258‐4651
Erik DicksonMissoula CountyDept. of Public Works 6089 Training DriveMissoula, MT 59808
Email:[email protected] Tel:(406) 258‐3772
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