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State Highway 21

MAIN ROUTE: ASCENDING ROAD: JURISDICTION ITD DISTRICT 3: ADA COUNTY
Segment Code Milepost Description of Roadway City Name Intersecting Segment Code Intersecting Milepost Federal Aid Route Number
002140 
.000    
JCT I-84 EB ON/OFF RAMPS IC# 57                
BOISE          
001121 
 .140   
 29    
002140 
.082    
CTR I-84 UNDERPASS EBL IC# 57                  
BOISE          
001010 
 56.932 
 29    
002140 
.108    
CTR I-84 UNDERPASS WBL IC# 57                  
BOISE          
001010 
 56.933 
 29    
002140 
.200    
JCT I-84 WB ON/OFF RAMPS IC# 57                
BOISE          
001124 
 .000   
 29    
002140 
.410    
GOWEN RD & FEDERAL WAY RT & LT                 
BOISE          
002141 
 .410   
 29    
002141 
.410    
GOWEN RD & FEDERAL WAY RT & LT                 
               
015997 
 .410   
 29    
002141 
.788    
E GRAND FOREST DR LT & S TECHNOLOGY WAY RT     
               
       
        
 29    
002141 
.968    
PEDESTRIAN/BICYCLE PASS                        
               
       
        
 29    
002141 
.988    
FIRE STATION LT                                
               
       
        
 29    
002141 
1.225   
E ALTARIDGE DR LT                              
               
       
        
 29    
002141 
2.190   
PEDESTRIAN/BICYCLE PASS                        
               
015938 
 11.949 
 29    
002141 
2.220   
E GRAND FOREST DRIVE LT                        
               
       
        
 29    
002141 
2.487   
E LAKE FOREST DR LT                            
               
002142 
 12.710 
 29    
002141 
2.500   
RD TO OREGON TRAIL INFORMATION KIOSK RT        
               
       
        
 29    
002141 
3.032   
S SURPRISE WAY LT                              
               
       
        
 29    
002141 
3.069   
AUTOMATIC TRAFFIC COUNTER STA #103             
               
       
        
 29    
002141 
3.130   
BEG DIVERSION DAM BRIDGE                       
               
       
        
 29    
002141 
3.410   
END DIVERSION DAM BRIDGE                       
               
       
        
 29    
002141 
3.440   
>>> LEAVING-URBAN-LIMITS <<
               
       
        
 29    
002141 
3.480   
OLD SH-21 LT & ACCESS RD TO GREENBELT RT       
               
002140 
 8.121  
 29    
002141 
3.580   
MILEPOST EQUATION 3.58 BK = 8.252 AH           
               
002140 
 8.252  
 29    
002141 
8.252   
MILEPOST EQUATION MARKER                       
               
       
        
 29    
002140 
8.252   
MP EQ MARKER/END NEW ALIGNMNT N OF DIVERSION D 
               
002141 
 3.580  
 29    
002140 
8.405   
DIVERSION DAM RT; ENT/EXT HISTORIC SITE #343 L 
               
       
        
 29    
002140 
8.405   
>>> LEAVING-URBAN-LIMITS <<
               
       
        
 29    
002140 
8.405   
DIVERSION DAM RT; ENT/EXT HISTORIC SITE #343 L 
               
       
        
 29    
002140 
8.454   
ENT/EXT HISTORIC SITE #343 LT                  
               
       
        
 29    
002140 
8.467   
BEG DIVIDED HWY                                
               
       
        
 29    
002140 
9.918   
END DIVIDED HWY                                
               
       
        
 29    
002140 
10.065  
ENT DISCOVERY STATE PARK RT                    
               
       
        
 29    
002140 
10.190  
ENT SANDY POINT REC AREA RT                    
               
       
        
 29    
002140 
10.320  
BEG PASSING LANE RT                            
               
       
        
 29    
002140 
10.620  
SANDY POINT LN LT                              
               
       
        
 29    
002140 
11.195  
LUCKY PEAK DAM RD RT                           
               
       
        
 29    
002140 
11.300  
ENT LUCKY PEAK DAM VIEWPOINT RT                
               
       
        
 29    
002140 
13.615  
HIGHLAND VALLEY RD LT                          
               
       
        
 29    
002140 
14.450  
END PASSING LANE RT                            
               
       
        
 29    
002140 
14.540  
HIGHLAND VALLEY SUMMIT; ELEV 3782' (SIGN) RT   
               
       
        
 29    
002140 
14.965  
BEG BIT CURB SECTION N & S BD                  
               
       
        
 29    
002140 
16.415  
ENT LUCKY PEAK FOREST NURSERY RT               
               
       
        
 29    
002140 
16.425  
END PASSING LANE LT                            
               
       
        
 29    
002140 
16.860  
CTR FISH & GAME CHECK STATION LT               
               
       
        
 29    
002140 
17.140  
HISTORICAL SITES #318 & #376 RT                
               
       
        
 29    
002140 
17.160  
BEG MORES CR;LUCKY PEAK RES BR                 
               
       
        
 29    
002140 
17.325  
END MORES CR;LUCKY PEAK RES BR                 
               
       
        
 29    
002140 
17.340  
RD TO ARROWROCK DAM RT                         
               
000435 
100.000 
 29    
002140 
17.575  
>>> END-COUNTY-LIMITS <<<                      
               
       
        
 29    

MAIN ROUTE: ASCENDING ROAD: JURISDICTION ITD DISTRICT 3: BOISE COUNTY
Segment Code Milepost Description of Roadway City Name Intersecting Segment Code Intersecting Milepost Federal Aid Route Number
002140 
17.575  
>>> BEG-COUNTY-LIMITS <<<                      
               
       
        
 29    
002140 
18.150  
BOISE NATIONAL FOREST (SIGN) RT                
               
       
        
 29    
002140 
20.180  
BEG TURNOUT LT                                 
               
       
        
 29    
002140 
20.190  
HISTORICAL SITE #266 LT                        
               
       
        
 29    
002140 
20.200  
END TURNOUT LT                                 
               
       
        
 29    
002140 
20.855  
BEG BADGER GULCH BRIDGE                        
               
       
        
 29    
002140 
20.886  
AUTOMATIC TRAFFIC COUNTER STA #53              
               
       
        
 29    
002140 
20.992  
FS RD #237 RT                                  
               
013608 
100.000 
 29    
002140 
21.385  
BEG PASSING LANE LT                            
               
       
        
 29    
002140 
21.910  
END PASSING LN LT                              
               
       
        
 29    
002140 
21.990  
ROBIE CR RD LT                                 
               
       
        
 29    
002140 
21.990  
ROBIE CR RD LT                                 
               
       
        
 29    
002140 
23.040  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
23.105  
END TURNOUT RT                                 
               
       
        
 29    
002140 
23.987  
DAGGETT GRADE RD LT                            
               
013846 
100.000 
 29    
002140 
24.340  
BEG MORES CREEK BRIDGE                         
               
       
        
 29    
002140 
24.370  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
24.460  
END TURNOUT RT                                 
               
       
        
 29    
002140 
27.250  
BEG MORES CREEK BRIDGE                         
               
       
        
 29    
002140 
28.870  
BEG MORES CREEK BRIDGE                         
               
       
        
 29    
002140 
28.885  
GRIMES CR RD LT                                
               
000429 
100.000 
 29    
002140 
28.890  
HISTORICAL SITE #188 LT                        
               
       
        
 29    
002140 
29.665  
BEG MORES CREEK BRIDGE                         
               
       
        
 29    
002140 
30.165  
BEG MORES CREEK BRIDGE                         
               
       
        
 29    
002140 
30.450  
BEG MORES CREEK BRIDGE                         
               
       
        
 29    
002140 
30.670  
BEG TURNOUT LT                                 
               
       
        
 29    
002140 
30.700  
END TURNOUT LT                                 
               
       
        
 29    
002140 
31.235  
THORN CR RD RT                                 
               
013610 
112.857 
 29    
002140 
31.255  
BEG MORES CREEK BRIDGE                         
               
       
        
 29    
002140 
32.980  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
33.050  
END TURNOUT RT                                 
               
       
        
 29    
002140 
33.085  
BEG MORES CREEK BRIDGE                         
               
       
        
 29    
002140 
33.247  
BEG MORES CREEK BRIDGE                         
               
       
        
 29    
002140 
34.040  
BEG SLOW VEHICLE TURNOUT RT                    
               
       
        
 29    
002140 
34.690  
END SLOW VEHICLE TURNOUT RT                    
               
       
        
 29    
002140 
35.378  
BEG MORES CREEK BRIDGE                         
               
       
        
 29    
002140 
35.570  
BEG MORES CREEK BRIDGE                         
               
       
        
 29    
002140 
35.610  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
35.680  
END TURNOUT RT                                 
               
       
        
 29    
002140 
36.612  
ENT TO GRAYBACK CAMPGROUND RT                  
               
       
        
 29    
002140 
36.940  
BEG ELK CREEK BRIDGE                           
               
       
        
 29    
002140 
37.205  
ENT TO WARM SPRINGS RESORT                     
               
       
        
 29    
002140 
37.700  
BAVARIAN RD LT                                 
               
       
        
 29    
002140 
38.428  
>>> ENTERING-CITY-LIMITS <<<                   
IDAHO CITY     
       
        
 29    
002140 
38.645  
HISTORICAL SITE #186 LT                        
IDAHO CITY     
       
        
 29    
002140 
38.800  
COTTONWOOD ST LT                               
IDAHO CITY     
       
        
 29    
002140 
38.872  
MONTGOMERY ST LT                               
IDAHO CITY     
003780 
 .000   
 29    
002140 
38.908  
MAIN ST LT                                     
IDAHO CITY     
       
        
 29    
002140 
38.973  
>>>> LEAVING-CITY-LIMITS <<<                   
IDAHO CITY     
       
        
 29    
002140 
38.990  
ENT ITD MAINTENANCE YARD #33000 RT             
               
       
        
 29    
002140 
39.022  
KING RD LT                                     
               
       
        
 29    
002140 
39.050  
EAST HILL RD LT                                
               
       
        
 29    
002140 
39.970  
BANNOCK CR RD RT                               
               
       
        
 29    
002140 
40.510  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
40.540  
END TURNOUT RT                                 
               
       
        
 29    
002140 
41.090  
RABBIT CR RD RT                                
               
       
        
 29    
002140 
45.925  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
45.964  
END TURNOUT RT                                 
               
       
        
 29    
002140 
45.965  
WINTER CLOSING GATES RT & LT                   
               
       
        
 29    
002140 
47.700  
ENT TO TEN MILE REST AREA RT                   
               
       
        
 29    
002140 
48.050  
ENT TO BAD BEAR CAMPGROUND LT                  
               
       
        
 29    
002140 
48.160  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
48.310  
END TURNOUT RT                                 
               
       
        
 29    
002140 
48.915  
ENT TO HAYFORK CAMPGROUND RT                   
               
       
        
 29    
002140 
51.890  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
51.940  
END TURNOUT RT                                 
               
       
        
 29    
002140 
52.330  
MORES CR SUMMIT; ELEV 6117' (SIGN) RT          
               
       
        
 29    
002140 
56.755  
CROOKED RIVER RD RT                            
               
       
        
 29    
002140 
59.235  
ENT TO PARK 'N SKI AREA LT                     
               
       
        
 29    
002140 
62.920  
BEAVER CR SUMMIT; ELEV 6041' (SIGN) RT         
               
       
        
 29    
002140 
69.985  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
70.015  
END TURNOUT RT                                 
               
       
        
 29    
002140 
70.060  
BEG SCENIC VIEWPOINT RT                        
               
       
        
 29    
002140 
70.095  
END SCENIC VIEWPOINT RT                        
               
       
        
 29    
002140 
71.350  
WINTER CLOSING GATES RT & LT                   
               
       
        
 29    
002140 
72.163  
LOWMAN (SIGN RT; UNINCORPORATED)               
               
       
        
 29    
002140 
72.360  
BEG S FK PAYETTE RIVER BRIDGE                  
               
       
        
 29    
002140 
72.405  
END S FK PAYETTE RIVER BRIDGE                  
               
       
        
 29    
002140 
72.485  
ENT ITD MAINTENANCE YARD #31900 RT             
               
       
        
 29    
002140 
72.610  
GARDEN VALLEY RD (STC 3824) LT                 
               
003770 
 25.270 
 29    
002140 
72.680  
BEAR VALLEY RD LT                              
               
003770 
 25.270 
 29    
002140 
72.697  
BEG CLEAR CREEK BRIDGE                         
               
       
        
 29    
002140 
72.725  
END CLEAR CREEK BRIDGE                         
               
       
        
 29    
002140 
72.810  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
72.860  
END TURNOUT RT                                 
               
       
        
 29    
002140 
73.080  
MILLER MTN RD LT                               
               
       
        
 29    
002140 
73.225  
ENT TO MTN VIEW CAMPGROUND RT                  
               
       
        
 29    
002140 
73.600  
BOISE NATIONAL FOREST (SIGN) RT                
               
       
        
 29    
002140 
74.930  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
75.020  
END TURNOUT RT                                 
               
       
        
 29    
002140 
76.945  
ENT TO KIRKHAM HOT SPRS CAMPGROUND RT          
               
       
        
 29    
002140 
77.480  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
77.550  
END TURNOUT RT                                 
               
       
        
 29    
002140 
78.490  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
78.530  
END TURNOUT RT                                 
               
       
        
 29    
002140 
78.720  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
78.760  
END TURNOUT RT                                 
               
       
        
 29    
002140 
78.785  
ARCHIE CREEK RD RT                             
               
       
        
 29    
002140 
81.440  
ENT TO HELENDE CAMPGROUND RT                   
               
       
        
 29    
002140 
85.320  
BEG EIGHT MILE CREEK BRIDGE                    
               
       
        
 29    
002140 
85.457  
EIGHT MILE CR RD RT                            
               
       
        
 29    
002140 
85.500  
MILEPOST EQUATION                              
               
       
        
 29    
002140 
87.650  
BEG S FK PAYETTE RIVER BRIDGE                  
               
       
        
 29    
002140 
90.810  
BEG CHAPMAN CREEK BRIDGE                       
               
       
        
 29    
002140 
91.020  
BEG S FK PAYETTE RIVER BRIDGE                  
               
       
        
 29    
002140 
91.495  
RD TO WARM SPRINGS CR AIRPORT LT               
               
       
        
 29    
002140 
91.570  
BEG WARM SPRINGS CREEK BRIDGE                  
               
       
        
 29    
002140 
93.750  
GRANDJEAN RD RT                                
               
       
        
 29    
002140 
93.835  
EMERGENCY TELEPHONE RT                         
               
       
        
 29    
002140 
93.850  
LOWER AVALANCHE GATES RT & LT                  
               
       
        
 29    
002140 
93.950  
AUTOMATIC TRAFFIC COUNTER STA #81              
               
       
        
 29    
002140 
94.960  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
95.010  
END TURNOUT RT                                 
               
       
        
 29    
002140 
95.395  
ENT TO SCENIC OVERLOOK RT                      
               
       
        
 29    
002140 
95.440  
HISTORICAL SITE #435 RT                        
               
       
        
 29    
002140 
95.445  
ENT TO SCENIC OVERLOOK RT                      
               
       
        
 29    
002140 
95.655  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
95.690  
END TURNOUT RT                                 
               
       
        
 29    
002140 
95.710  
EMERGENCY CACHE LT; EMERGENCY HELIPORT RT      
               
       
        
 29    
002140 
96.640  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
96.675  
END TURNOUT RT                                 
               
       
        
 29    
002140 
97.460  
BEG CANYON CREEK BRIDGE                        
               
       
        
 29    
002140 
97.520  
BEG CANYON CREEK BRIDGE                        
               
       
        
 29    
002140 
97.700  
EMERGENCY CACHE LT                             
               
       
        
 29    
002140 
98.180  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
98.210  
END TURNOUT RT                                 
               
       
        
 29    
002140 
98.660  
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
98.710  
END TURNOUT RT                                 
               
       
        
 29    
002140 
100.470 
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
100.520 
END TURNOUT RT                                 
               
       
        
 29    
002140 
100.990 
BEG CANYON CREEK BRIDGE                        
               
       
        
 29    
002140 
101.380 
BEG CANYON CREEK                               
               
       
        
 29    
002140 
103.760 
BEG CANYON CREEK                               
               
       
        
 29    
002140 
105.200 
AUTOMATIC TRAFFIC COUNTER STA #86              
               
       
        
 29    
002140 
105.268 
CULVERT (CMP)                                  
               
       
        
 29    
002140 
105.440 
UPPER AVALANCHE GATE RT & LT; EMERGENCY CACHE  
               
       
        
 29    
002140 
105.450 
BEG TURNOUT RT                                 
               
       
        
 29    
002140 
105.487 
END TURNOUT RT                                 
               
       
        
 29    
002140 
105.490 
CHALLIS NATIONAL FOREST (SIGN) RT              
               
       
        
 29    
002140 
105.495 
BANNER CREEK SUMMIT; ELEV 7046' (SIGN) RT      
               
       
        
 29    
002140 
105.517 
>>> END-COUNTY-LIMITS <<<                      
               
       
        
 29    

MAIN ROUTE: ASCENDING ROAD: JURISDICTION ITD DISTRICT 4: CUSTER COUNTY
Segment Code Milepost Description of Roadway City Name Intersecting Segment Code Intersecting Milepost Federal Aid Route Number
002140 
105.517 
>>> BEG-COUNTY-LIMITS <<<                      
               
       
        
 29    
002140 
106.320 
ENT BENCH CREEK CAMPGROUND LT                  
               
       
        
 29    
002140 
106.570 
BEG TURNOUT LT                                 
               
       
        
 29    
002140 
106.650 
END TURNOUT LT                                 
               
       
        
 29    
002140 
106.655 
BULL TROUT LAKE RD LT                          
               
       
        
 29    
002140 
107.060 
ENT GRANITE CREEK CAMPGROUND RT                
               
       
        
 29    
002140 
107.110 
BENCH CREEK                                    
               
       
        
 29    
002140 
107.580 
BANNER CREEK                                   
               
       
        
 29    
002140 
107.697 
NEWMAN CREEK                                   
               
       
        
 29    
002140 
107.710 
BEG BANNER CREEK                               
               
       
        
 29    
002140 
108.770 
BEG BANNER CREEK                               
               
       
        
 29    
002140 
109.010 
ENT BANNER CREEK CAMPGROUND RT                 
               
       
        
 29    
002140 
109.262 
CAPE HORN CREEK                                
               
       
        
 29    
002140 
109.370 
BEAR VALLEY RD LT                              
               
       
        
 29    
002140 
109.759 
CREEK                                          
               
       
        
 29    
002140 
111.112 
CREEK                                          
               
       
        
 29    
002140 
112.505 
SEAFOAM RD (TO BRADLEY BOY SCOUT CAMP) LT      
               
       
        
 29    
002140 
112.510 
BEG TURNOUT LT                                 
               
       
        
 29    
002140 
112.550 
END TURNOUT LT                                 
               
       
        
 29    
002140 
112.685 
BEG CAPE HORN BRIDGE                           
               
       
        
 29    
002140 
114.955 
ENT THATCHER CREEK CAMPGROUND RT               
               
       
        
 29    
002140 
115.520 
SWAMP CREEK                                    
               
       
        
 29    
002140 
116.180 
BEG TURNOUT LT                                 
               
       
        
 29    
002140 
116.230 
END TURNOUT LT                                 
               
       
        
 29    
002140 
116.707 
VADER CREEK                                    
               
       
        
 29    
002140 
116.825 
ENT VADER CREEK CAMPGROUND LT                  
               
       
        
 29    
002140 
117.167 
FLAT CREEK                                     
               
       
        
 29    
002140 
118.355 
SAWTOOTH NATL RECREATION AREA BDRY (SIGN) RT   
               
       
        
 29    
002140 
118.900 
CULVERT                                        
               
       
        
 29    
002140 
119.000 
TRAP CREEK                                     
               
       
        
 29    
002140 
119.145 
ENT TRAP CREEK CAMPGROUND RT                   
               
       
        
 29    
002140 
119.450 
CULVERT                                        
               
       
        
 29    
002140 
119.540 
CAPE HORN RD LT                                
               
       
        
 29    
002140 
121.340 
ENT SHEEP TRAIL CMPGRND RT; ENT/EXIT VIEWPT LT 
               
001347 
112.000 
 29    
002140 
121.410 
BEG TRAP CREEK BRIDGE                          
               
       
        
 29    
002140 
123.015 
ENT ELK CREEK CAMPGROUND LT                    
               
       
        
 29    
002140 
123.060 
BEG ELK CREEK BRIDGE                           
               
       
        
 29    
002140 
123.490 
ENT/EXIT VIEWPOINT RT                          
               
       
        
 29    
002140 
123.885 
PARK CREEK                                     
               
       
        
 29    
002140 
124.480 
DRY CREEK                                      
               
       
        
 29    
002140 
125.080 
CULVERT                                        
               
       
        
 29    
002140 
125.810 
BEG STANLEY LAKE CR BRIDGE                     
               
       
        
 29    
002140 
125.905 
STANLEY LAKE RD RT; COW CAMP RD LT             
               
       
        
 29    
002140 
126.600 
JOB CREEK                                      
               
       
        
 29    
002140 
127.118 
BEG CROOKED CREEK BRIDGE                       
               
       
        
 29    
002140 
127.760 
ENT ITD MAINTENANCE YARD #41100 RT             
               
       
        
 29    
002140 
128.350 
IRON CR RD (TO CAMPGROUND) RT                  
               
       
        
 29    
002140 
129.230 
IRON CREEK                                     
               
       
        
 29    
002140 
129.748 
GOAT CREEK                                     
               
       
        
 29    
002140 
129.950 
>>> ENTERING-CITY-LIMITS <<<                   
STANLEY        
       
        
 29    
002140 
130.170 
MEADOW CREEK                                   
STANLEY        
       
        
 29    
002140 
130.435 
NIECE AVE RT                                   
STANLEY        
       
        
 29    
002140 
130.505 
WALLS ST/AIRPORT RD RT                         
STANLEY        
       
        
 29    
002140 
130.869 
JCT SH-75 RT & LT                              
STANLEY        
002230 
189.378 
 29    

Page Last Modified: 1/29/2008 3:36:04 PM

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Idaho Transportation Department
3311 W. State Street ยท P.O. Box 7129
Boise, ID 83707-1129