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Mad, NH

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2. Gorge (Secret Gorge)

Class III
1 Miles
Avg Gradient 73 fpm
Max Gradient 73 fpm

Typical drop


Typical drop
Photo of Mike Gatewood by Mark Lacroix taken 3/17/02 @ Minimum flow

Gauge Information

Mad
2. Gorge III
low
0.31
7/4 18:15

Min Sug. Level:  1.2 Feet Max Sug. Level:  2.8 Feet

River Description

This is a nice but short pool and drop river. There are many 2 and 3 foot ledge drops amongst large granite boulders through a steep sided gorge. At low levels it can be a little scratchy at the begining and the end. There is not much playing to be had on this river section but it is a good place to learn skills for steep creaking. If the dam is spilling water put in at the first location by the dam. Walk down a steep embankment on river left downstream from the bridge. This will give you access to two warm up rapids (Upper and Lower White Pine rapid), with some surfing waves to play in. If the water is marginal or being bypassed by the hydro station it will be necessary to put in 1/4 mile further downstream.

Technical info

Put in elevation........633'
Take out elevation......560'
Total drop..............73'
Average drop/mile.......73'
Distance................1.0 mile
River width average.....50'
River geology...........granite ledge, Large boulders, steep sided gorge 
River water quality.....Good to excellent, clarity excellent.
Scenery.................An isolated steep gorge next to NH route 49 and 
                        Campton village, but all are out of sight once you
                        enter the gorge.
Wildlife................Occasional Moose, deer, hawks. 

Directions


Put in (from interstate 93 Concord)

Interstate 93 north to exit 28.
Take a right at exit on NH 49 east approximately 1.5 miles.
Take a right (south) on NH 175 at the light.
Just after the bridge take a left and park close to the dam.
If the water is too low in this section, continue 1/4 mile to a small pull off where the river is close to the road on the right.

Take out

Head back to NH 49.
Take a left (west) at the light back towards Interstate 93
1 mile take a left at the Handyman True Value Hardeware store.
50 yards take a left and park behind the Embroidery factory building just before you enter the trailer park

StreamTeam Status: verified
Last Updated: 2008-05-04 10:08:12

Search Results

Photos/Videos 1- of 8

Typical drop


Typical drop  Mad NH
(146.49KB .jpeg)

Put in at the Dam


Put in at the Dam  Mad NH
(19.26KB .jpeg)

Below Big Pine


Below Big Pine  Mad River NH
(23.15KB .jpeg)

Tavern Drop


Tavern Drop  Mad River NH
(27.10KB .jpeg)

Tavern Drop #2


Tavern Drop #2  Mad River NH
(23.34KB .jpeg)

Sunset Ledge


Sunset Ledge  Mad River NH
(21.01KB .jpeg)

Sunset Ledge #2


Sunset Ledge #2  Mad River NH
(21.11KB .jpeg)

TC at Big Pine


TC at Big Pine  Mad River NH
(23.70KB .jpeg)

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Gauge

Gauge Description:

Note: The gauge referred to in this section is a virtual "regional" gauge. It is in a nearby watershed but the proximity of the gauge and the river characteristics are similar. This virtual gage is linked to the East Branch of the Pemi gage and is calculated for the Six Mile bridge gage located 4 miles upstream.  These gauges work best in the spring or wide area rain events. Do not rely on this gauge for localized rain events such as summertime thunderstorm activity. Current minimum run level for this stretch is still to be verified (see table below). Currently there is no gage actually on this section. If the Upper Mad is just below runnable levels than the gorge should be high enough. If there is 3" of water coming over the dam at the intersection of NH 49 and NH 175 then the river should be medium. The water is occasionally diverted downstream about 100 yards through a small hydro facility. When the hydro is on full then there should be a minimum flow level through the gorge. Check the first put in location and look downstream from the bridge, if this looks too low, drive south on 175 an additional .25 miles. Park on the right where the river is close to the road. Look downstream, if the ledge to the left of the channel is spilling water or just under then this is a minimum low level. If most all the water is spilling through the right channel then the water is too low.
Building a "Virtual" gauge for the Mad
In the table below visual observations have been matched with actual USGS gauge readings from three other nearby watersheds. This is an attempt to build a �Virtual� gauge for the Mad. Virtual gauges work best during spring runoff and widespread rain events but should not be relied upon for localized rain events such as thunderstorm activity. Once enough observations have been matched with the USGS gauge readings, we will determine which USGS gauge best matches the Mad river's runoff profile.
 

 

Gauge correlations for the� Mad river Thornton NH

Date

Time

6 mile bridge

Bearcamp USGS

East Branch USGS

Baker River� USGS Interpretation
4/3/02 6:00 pm 1.4 5.45 RR* 6.76 RR* 3.12 RR* Very low
4/4/02 6:50 am 1.5 5.68 FS* 7.06 FS* 3.47 FS* Very low
4/4/02 11:30 am 1.3 5.59 FS* 6.96 FS* 3.26 FS* Very low
4/10/02 9:30 am 1.4 5.16 S* 7.78 S* 3.40 S* Very low
4/13/02 6:15 am 1.6 4.83 S* 7.63 RS* 2.83 S* �low
4/14/02 6:00 am 3.5 6.19 FS* 13.13 FR* 8.81 FR* Very high
4/14/02 1:00 pm 2.8 5.81 FS* 10.72 FR* 5.68 FR* �high
4/16/02 9:00 am 2.0 5.55 FS* 8.74 S* 3.68 FS* Medium
4/16/02 3:00 pm 2.2 5.45 FS* 9.08 RS* 3.53 S* Medium

*RR=rising rapidly� RS=rising slowly� S=steady� FR=falling rapidly� FS=falling slowly

 

 

Mad 1 [ NH ]

Disclaimer Data Sources

Current Conditions

StageFlowUpdated
0.317/4 18:15

Station Graph

Linked Reaches

Search Results

Level Legend: Running Below Minimum Recommended Flow Above Maximum Recommended Flow Unknown
Descriptions of reaches with River Name in bold have been verified by a regional StreamTeam member.

State River Name/Section Class Level Rel. Level Updated
NH Mad— 1. Highway 49 Bridge (Waterville Valley) to Campton III-IV 0.31 Feet   low 7/4 18:15
NH Mad— 2. Gorge III 0.31 Feet   low 7/4 18:15

Station Description

AW Gauge ID: 11131
StreamTeam Member: Matt Muir
Mad 1 is a virtual gage that is linked to the East Branch of the Pemi gage. The stage number shown below is a best bet calculation of what the Six Mile Bridge gage should be reading.

Formula

$x=gauge(56,"flow")**.51697 *.04073

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Rapid Summary

Mile Rapid Name Class Features (Legend)
0.0Map of the Mid Pemi regionPutin Takeout Photo
0.0Put InPutin Photo
0.1Big PineIIPhoto
0.3Tavern DropIIIPhoto
0.7Sunset DropIIIPhoto
1.0Take Out

Rapid Descriptions

Map of the Mid Pemi region

Rivers of the Middle Pemigewasset region

Rivers of the Middle Pemigewasset region
Photo by Mark Lacroix


Put In

Put in at the Dam

Put in at the Dam
Photo of Mike Wevrick by Mark Lacroix taken 2008-05-02 @ 1.4 Six Mile Bridge

Put in at the Campton Dam at the street light a the intersection of NH rte 49 and NH rte 175. The best spot to carry down is river left just downstream of the dam and rte 175 bridge. Note that during low water much of the water is diverted form the dam through a penstock under rte 175 and re-enters the river at a micro hydro station about 500 ft downstream of the dam. If clear laminer flow continues 1/3 of the way, or greater, down the face of the dam then there should be enough water for the first couple rapids (i.e. upper and Lower Big Pine). Anything less will be a scratchy run at best.

Big Pine (Class II, Mile 0.1)

TC at Big Pine

TC at Big Pine
Photo of Tom Currier by Mark Lacroix taken 2008-05-02 @ 1.4 Six Mile Bridge

Upper and lower Big Pine rapeds are straight forward easy drops.  At the lower levels, such as when the water is diverted around these rapids, they can be quit boney.  Rapid is named for a large tall white pine tree on river left.



Tavern Drop (Class III, Mile 0.3)

Tavern Drop

Tavern Drop
Photo of Julie Smith by Mark Lacroix taken 2008-05-02 @ 1.4 Six Mile Bridge

As soon as you turn right away from NH rte 175 the Mad enters the gorge section.  You will immediately start encountering several ledge drops spaced only a dozen or so yards apart.  One of the major ones is a couple drops downstream of an old metal discharge culvert at a cliff overhang on river left.  The drop is somewhat blinded by large boulders but the river right side has a clear path.  Drop is named for the Mad River Tavern which is on river right (out of sight) on top of the gorge on NH rte 49.



Sunset Drop (Class III, Mile 0.7)

Sunset Ledge

Sunset Ledge
Photo of Richar Chaney by Mark Lacroix taken 2008-05-02 @ 1.4 Six Mile Bridge

Nice 3 foot ledge drop great for learning boofing manuevers.  Left side is more vertical and has a fairly mean hole in it at higher levels. Feature is named after Sunset Hill on river right above the gorge.



Take Out

As the river slows down to a few ripples look for an easy exit over the loose gravel and boulders on the river right bank.  The takeout from the road is located behind A&H Aoutomotive.  From exit 28 turn right on the road between A&H and the Handyman Hardware store.  Just past the harware store take a left at the Embroidery factory and park in the roadside clearings by the factory.  You should take a walk into the woods to the river to try and get visual marker so you can recognize the takeout from riverside.




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Disclaimer Data Sources

NPS NH Rivers Inventory


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